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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…

…/git/viro/vfs

Pull third pile of VFS updates from Al Viro:
 "Stuff from Jeff Layton, mostly.  Sanitizing interplay between audit
  and namei, removing a lot of insanity from audit_inode() mess and
  getting things ready for his ESTALE patchset."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  procfs: don't need a PATH_MAX allocation to hold a string representation of an int
  vfs: embed struct filename inside of names_cache allocation if possible
  audit: make audit_inode take struct filename
  vfs: make path_openat take a struct filename pointer
  vfs: turn do_path_lookup into wrapper around struct filename variant
  audit: allow audit code to satisfy getname requests from its names_list
  vfs: define struct filename and have getname() return it
  vfs: unexport getname and putname symbols
  acct: constify the name arg to acct_on
  vfs: allocate page instead of names_cache buffer in mount_block_root
  audit: overhaul __audit_inode_child to accomodate retrying
  audit: optimize audit_compare_dname_path
  audit: make audit_compare_dname_path use parent_len helper
  audit: remove dirlen argument to audit_compare_dname_path
  audit: set the name_len in audit_inode for parent lookups
  audit: add a new "type" field to audit_names struct
  audit: reverse arguments to audit_inode_child
  audit: no need to walk list in audit_inode if name is NULL
  audit: pass in dentry to audit_copy_inode wherever possible
  audit: remove unnecessary NULL ptr checks from do_path_lookup
  • Loading branch information...
commit 8418263e3547ed3816475e4c55a77004f0426ee6 2 parents ccff9b1 + f81700b
@torvalds torvalds authored
Showing with 544 additions and 312 deletions.
  1. +8 −8 arch/alpha/kernel/osf_sys.c
  2. +2 −2 arch/arm64/kernel/sys.c
  3. +3 −3 arch/arm64/kernel/sys_compat.c
  4. +2 −2 arch/avr32/kernel/process.c
  5. +2 −2 arch/blackfin/kernel/process.c
  6. +2 −2 arch/cris/arch-v10/kernel/process.c
  7. +2 −2 arch/cris/arch-v32/kernel/process.c
  8. +2 −2 arch/h8300/kernel/process.c
  9. +2 −2 arch/hexagon/kernel/syscall.c
  10. +2 −2 arch/ia64/kernel/process.c
  11. +2 −2 arch/m32r/kernel/process.c
  12. +2 −2 arch/microblaze/kernel/sys_microblaze.c
  13. +2 −2 arch/mips/kernel/linux32.c
  14. +2 −2 arch/mips/kernel/syscall.c
  15. +2 −2 arch/openrisc/kernel/process.c
  16. +2 −2 arch/parisc/hpux/fs.c
  17. +2 −2 arch/parisc/kernel/process.c
  18. +2 −2 arch/parisc/kernel/sys_parisc32.c
  19. +2 −2 arch/score/kernel/sys_score.c
  20. +2 −2 arch/sh/kernel/process_32.c
  21. +2 −2 arch/sh/kernel/process_64.c
  22. +2 −2 arch/sparc/kernel/process_32.c
  23. +2 −2 arch/sparc/kernel/process_64.c
  24. +2 −2 arch/sparc/kernel/sys_sparc32.c
  25. +4 −4 arch/tile/kernel/process.c
  26. +2 −2 arch/unicore32/kernel/sys.c
  27. +2 −2 arch/xtensa/kernel/process.c
  28. +1 −1  fs/btrfs/ioctl.c
  29. +6 −6 fs/compat.c
  30. +8 −6 fs/exec.c
  31. +2 −2 fs/filesystems.c
  32. +2 −2 fs/internal.h
  33. +141 −72 fs/namei.c
  34. +2 −2 fs/namespace.c
  35. +23 −6 fs/open.c
  36. +3 −2 fs/proc/base.c
  37. +2 −2 fs/quota/quota.c
  38. +4 −4 fs/xattr.c
  39. +50 −19 include/linux/audit.h
  40. +16 −5 include/linux/fs.h
  41. +4 −4 include/linux/fsnotify.h
  42. +4 −3 init/do_mounts.c
  43. +9 −8 ipc/mqueue.c
  44. +3 −3 kernel/acct.c
  45. +5 −2 kernel/audit.h
  46. +2 −1  kernel/audit_watch.c
  47. +42 −23 kernel/auditfilter.c
  48. +147 −70 kernel/auditsc.c
  49. +5 −6 mm/swapfile.c
View
16 arch/alpha/kernel/osf_sys.c
@@ -449,7 +449,7 @@ osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
{
int retval;
struct cdfs_args tmp;
- char *devname;
+ struct filename *devname;
retval = -EFAULT;
if (copy_from_user(&tmp, args, sizeof(tmp)))
@@ -458,7 +458,7 @@ osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
retval = PTR_ERR(devname);
if (IS_ERR(devname))
goto out;
- retval = do_mount(devname, dirname, "ext2", flags, NULL);
+ retval = do_mount(devname->name, dirname, "ext2", flags, NULL);
putname(devname);
out:
return retval;
@@ -469,7 +469,7 @@ osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
{
int retval;
struct cdfs_args tmp;
- char *devname;
+ struct filename *devname;
retval = -EFAULT;
if (copy_from_user(&tmp, args, sizeof(tmp)))
@@ -478,7 +478,7 @@ osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
retval = PTR_ERR(devname);
if (IS_ERR(devname))
goto out;
- retval = do_mount(devname, dirname, "iso9660", flags, NULL);
+ retval = do_mount(devname->name, dirname, "iso9660", flags, NULL);
putname(devname);
out:
return retval;
@@ -499,7 +499,7 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
int, flag, void __user *, data)
{
int retval;
- char *name;
+ struct filename *name;
name = getname(path);
retval = PTR_ERR(name);
@@ -507,13 +507,13 @@ SYSCALL_DEFINE4(osf_mount, unsigned long, typenr, const char __user *, path,
goto out;
switch (typenr) {
case 1:
- retval = osf_ufs_mount(name, data, flag);
+ retval = osf_ufs_mount(name->name, data, flag);
break;
case 6:
- retval = osf_cdfs_mount(name, data, flag);
+ retval = osf_cdfs_mount(name->name, data, flag);
break;
case 9:
- retval = osf_procfs_mount(name, data, flag);
+ retval = osf_procfs_mount(name->name, data, flag);
break;
default:
retval = -EINVAL;
View
4 arch/arm64/kernel/sys.c
@@ -50,13 +50,13 @@ asmlinkage long sys_execve(const char __user *filenamei,
struct pt_regs *regs)
{
long error;
- char * filename;
+ struct filename *filename;
filename = getname(filenamei);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, argv, envp, regs);
+ error = do_execve(filename->name, argv, envp, regs);
putname(filename);
out:
return error;
View
6 arch/arm64/kernel/sys_compat.c
@@ -56,14 +56,14 @@ asmlinkage int compat_sys_execve(const char __user *filenamei,
struct pt_regs *regs)
{
int error;
- char * filename;
+ struct filename *filename;
filename = getname(filenamei);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = compat_do_execve(filename, compat_ptr(argv), compat_ptr(envp),
- regs);
+ error = compat_do_execve(filename->name, compat_ptr(argv),
+ compat_ptr(envp), regs);
putname(filename);
out:
return error;
View
4 arch/avr32/kernel/process.c
@@ -388,14 +388,14 @@ asmlinkage int sys_execve(const char __user *ufilename,
struct pt_regs *regs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname(ufilename);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, uargv, uenvp, regs);
+ error = do_execve(filename->name, uargv, uenvp, regs);
putname(filename);
out:
View
4 arch/blackfin/kernel/process.c
@@ -213,14 +213,14 @@ asmlinkage int sys_execve(const char __user *name,
const char __user *const __user *envp)
{
int error;
- char *filename;
+ struct filename *filename;
struct pt_regs *regs = (struct pt_regs *)((&name) + 6);
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
return error;
- error = do_execve(filename, argv, envp, regs);
+ error = do_execve(filename->name, argv, envp, regs);
putname(filename);
return error;
}
View
4 arch/cris/arch-v10/kernel/process.c
@@ -212,14 +212,14 @@ asmlinkage int sys_execve(const char *fname,
struct pt_regs *regs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname(fname);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, argv, envp, regs);
+ error = do_execve(filename->name, argv, envp, regs);
putname(filename);
out:
return error;
View
4 arch/cris/arch-v32/kernel/process.c
@@ -224,7 +224,7 @@ sys_execve(const char *fname,
struct pt_regs *regs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname(fname);
error = PTR_ERR(filename);
@@ -232,7 +232,7 @@ sys_execve(const char *fname,
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, argv, envp, regs);
+ error = do_execve(filename->name, argv, envp, regs);
putname(filename);
out:
return error;
View
4 arch/h8300/kernel/process.c
@@ -217,14 +217,14 @@ asmlinkage int sys_execve(const char *name,
int dummy, ...)
{
int error;
- char * filename;
+ struct filename *filename;
struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4);
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
return error;
- error = do_execve(filename, argv, envp, regs);
+ error = do_execve(filename->name, argv, envp, regs);
putname(filename);
return error;
}
View
4 arch/hexagon/kernel/syscall.c
@@ -40,7 +40,7 @@ asmlinkage int sys_execve(char __user *ufilename,
const char __user *const __user *envp)
{
struct pt_regs *pregs = current_thread_info()->regs;
- char *filename;
+ struct filename *filename;
int retval;
filename = getname(ufilename);
@@ -48,7 +48,7 @@ asmlinkage int sys_execve(char __user *ufilename,
if (IS_ERR(filename))
return retval;
- retval = do_execve(filename, argv, envp, pregs);
+ retval = do_execve(filename->name, argv, envp, pregs);
putname(filename);
return retval;
View
4 arch/ia64/kernel/process.c
@@ -614,14 +614,14 @@ sys_execve (const char __user *filename,
const char __user *const __user *envp,
struct pt_regs *regs)
{
- char *fname;
+ struct filename *fname;
int error;
fname = getname(filename);
error = PTR_ERR(fname);
if (IS_ERR(fname))
goto out;
- error = do_execve(fname, argv, envp, regs);
+ error = do_execve(fname->name, argv, envp, regs);
putname(fname);
out:
return error;
View
4 arch/m32r/kernel/process.c
@@ -296,14 +296,14 @@ asmlinkage int sys_execve(const char __user *ufilename,
unsigned long r6, struct pt_regs regs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname(ufilename);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, uargv, uenvp, &regs);
+ error = do_execve(filename->name, uargv, uenvp, &regs);
putname(filename);
out:
return error;
View
4 arch/microblaze/kernel/sys_microblaze.c
@@ -54,13 +54,13 @@ asmlinkage long microblaze_execve(const char __user *filenamei,
struct pt_regs *regs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname(filenamei);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, argv, envp, regs);
+ error = do_execve(filename->name, argv, envp, regs);
putname(filename);
out:
return error;
View
4 arch/mips/kernel/linux32.c
@@ -83,13 +83,13 @@ SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
{
int error;
- char * filename;
+ struct filename *filename;
filename = getname(compat_ptr(regs.regs[4]));
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
+ error = compat_do_execve(filename->name, compat_ptr(regs.regs[5]),
compat_ptr(regs.regs[6]), &regs);
putname(filename);
View
4 arch/mips/kernel/syscall.c
@@ -133,13 +133,13 @@ _sys_clone(nabi_no_regargs struct pt_regs regs)
asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
{
int error;
- char * filename;
+ struct filename *filename;
filename = getname((const char __user *) (long)regs.regs[4]);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename,
+ error = do_execve(filename->name,
(const char __user *const __user *) (long)regs.regs[5],
(const char __user *const __user *) (long)regs.regs[6],
&regs);
View
4 arch/openrisc/kernel/process.c
@@ -271,7 +271,7 @@ asmlinkage long _sys_execve(const char __user *name,
struct pt_regs *regs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname(name);
error = PTR_ERR(filename);
@@ -279,7 +279,7 @@ asmlinkage long _sys_execve(const char __user *name,
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, argv, envp, regs);
+ error = do_execve(filename->name, argv, envp, regs);
putname(filename);
out:
View
4 arch/parisc/hpux/fs.c
@@ -34,14 +34,14 @@
int hpux_execve(struct pt_regs *regs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname((const char __user *) regs->gr[26]);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename,
+ error = do_execve(filename->name,
(const char __user *const __user *) regs->gr[25],
(const char __user *const __user *) regs->gr[24],
regs);
View
4 arch/parisc/kernel/process.c
@@ -342,13 +342,13 @@ unsigned long thread_saved_pc(struct task_struct *t)
asmlinkage int sys_execve(struct pt_regs *regs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname((const char __user *) regs->gr[26]);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename,
+ error = do_execve(filename->name,
(const char __user *const __user *) regs->gr[25],
(const char __user *const __user *) regs->gr[24],
regs);
View
4 arch/parisc/kernel/sys_parisc32.c
@@ -60,14 +60,14 @@
asmlinkage int sys32_execve(struct pt_regs *regs)
{
int error;
- char *filename;
+ struct filename *filename;
DBG(("sys32_execve(%p) r26 = 0x%lx\n", regs, regs->gr[26]));
filename = getname((const char __user *) regs->gr[26]);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = compat_do_execve(filename, compat_ptr(regs->gr[25]),
+ error = compat_do_execve(filename->name, compat_ptr(regs->gr[25]),
compat_ptr(regs->gr[24]), regs);
putname(filename);
out:
View
4 arch/score/kernel/sys_score.c
@@ -92,14 +92,14 @@ asmlinkage long
score_execve(struct pt_regs *regs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname((char __user*)regs->regs[4]);
error = PTR_ERR(filename);
if (IS_ERR(filename))
return error;
- error = do_execve(filename,
+ error = do_execve(filename->name,
(const char __user *const __user *)regs->regs[5],
(const char __user *const __user *)regs->regs[6],
regs);
View
4 arch/sh/kernel/process_32.c
@@ -298,14 +298,14 @@ asmlinkage int sys_execve(const char __user *ufilename,
{
struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
int error;
- char *filename;
+ struct filename *filename;
filename = getname(ufilename);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, uargv, uenvp, regs);
+ error = do_execve(filename->name, uargv, uenvp, regs);
putname(filename);
out:
return error;
View
4 arch/sh/kernel/process_64.c
@@ -491,14 +491,14 @@ asmlinkage int sys_execve(const char *ufilename, char **uargv,
struct pt_regs *pregs)
{
int error;
- char *filename;
+ struct filename *filename;
filename = getname((char __user *)ufilename);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename,
+ error = do_execve(filename->name,
(const char __user *const __user *)uargv,
(const char __user *const __user *)uenvp,
pregs);
View
4 arch/sparc/kernel/process_32.c
@@ -482,7 +482,7 @@ int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs)
asmlinkage int sparc_execve(struct pt_regs *regs)
{
int error, base = 0;
- char *filename;
+ struct filename *filename;
/* Check for indirect call. */
if(regs->u_regs[UREG_G1] == 0)
@@ -492,7 +492,7 @@ asmlinkage int sparc_execve(struct pt_regs *regs)
error = PTR_ERR(filename);
if(IS_ERR(filename))
goto out;
- error = do_execve(filename,
+ error = do_execve(filename->name,
(const char __user *const __user *)
regs->u_regs[base + UREG_I1],
(const char __user *const __user *)
View
4 arch/sparc/kernel/process_64.c
@@ -722,7 +722,7 @@ EXPORT_SYMBOL(dump_fpu);
asmlinkage int sparc_execve(struct pt_regs *regs)
{
int error, base = 0;
- char *filename;
+ struct filename *filename;
/* User register window flush is done by entry.S */
@@ -734,7 +734,7 @@ asmlinkage int sparc_execve(struct pt_regs *regs)
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename,
+ error = do_execve(filename->name,
(const char __user *const __user *)
regs->u_regs[base + UREG_I1],
(const char __user *const __user *)
View
4 arch/sparc/kernel/sys_sparc32.c
@@ -403,7 +403,7 @@ asmlinkage long compat_sys_rt_sigaction(int sig,
asmlinkage long sparc32_execve(struct pt_regs *regs)
{
int error, base = 0;
- char *filename;
+ struct filename *filename;
/* User register window flush is done by entry.S */
@@ -416,7 +416,7 @@ asmlinkage long sparc32_execve(struct pt_regs *regs)
if (IS_ERR(filename))
goto out;
- error = compat_do_execve(filename,
+ error = compat_do_execve(filename->name,
compat_ptr(regs->u_regs[base + UREG_I1]),
compat_ptr(regs->u_regs[base + UREG_I2]), regs);
View
8 arch/tile/kernel/process.c
@@ -594,13 +594,13 @@ SYSCALL_DEFINE4(execve, const char __user *, path,
struct pt_regs *, regs)
{
long error;
- char *filename;
+ struct filename *filename;
filename = getname(path);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, argv, envp, regs);
+ error = do_execve(filename->name, argv, envp, regs);
putname(filename);
if (error == 0)
single_step_execve();
@@ -615,13 +615,13 @@ long compat_sys_execve(const char __user *path,
struct pt_regs *regs)
{
long error;
- char *filename;
+ struct filename *filename;
filename = getname(path);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = compat_do_execve(filename, argv, envp, regs);
+ error = compat_do_execve(filename->name, argv, envp, regs);
putname(filename);
if (error == 0)
single_step_execve();
View
4 arch/unicore32/kernel/sys.c
@@ -51,13 +51,13 @@ asmlinkage long __sys_execve(const char __user *filename,
struct pt_regs *regs)
{
int error;
- char *fn;
+ struct filename *fn;
fn = getname(filename);
error = PTR_ERR(fn);
if (IS_ERR(fn))
goto out;
- error = do_execve(fn, argv, envp, regs);
+ error = do_execve(fn->name, argv, envp, regs);
putname(fn);
out:
return error;
View
4 arch/xtensa/kernel/process.c
@@ -328,13 +328,13 @@ long xtensa_execve(const char __user *name,
struct pt_regs *regs)
{
long error;
- char * filename;
+ struct filename *filename;
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
goto out;
- error = do_execve(filename, argv, envp, regs);
+ error = do_execve(filename->name, argv, envp, regs);
putname(filename);
out:
return error;
View
2  fs/btrfs/ioctl.c
@@ -638,7 +638,7 @@ static int btrfs_may_delete(struct inode *dir,struct dentry *victim,int isdir)
return -ENOENT;
BUG_ON(victim->d_parent->d_inode != dir);
- audit_inode_child(victim, dir);
+ audit_inode_child(dir, victim, AUDIT_TYPE_CHILD_DELETE);
error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
View
12 fs/compat.c
@@ -776,16 +776,16 @@ asmlinkage long compat_sys_mount(const char __user * dev_name,
char *kernel_type;
unsigned long data_page;
char *kernel_dev;
- char *dir_page;
+ struct filename *dir;
int retval;
retval = copy_mount_string(type, &kernel_type);
if (retval < 0)
goto out;
- dir_page = getname(dir_name);
- retval = PTR_ERR(dir_page);
- if (IS_ERR(dir_page))
+ dir = getname(dir_name);
+ retval = PTR_ERR(dir);
+ if (IS_ERR(dir))
goto out1;
retval = copy_mount_string(dev_name, &kernel_dev);
@@ -807,7 +807,7 @@ asmlinkage long compat_sys_mount(const char __user * dev_name,
}
}
- retval = do_mount(kernel_dev, dir_page, kernel_type,
+ retval = do_mount(kernel_dev, dir->name, kernel_type,
flags, (void*)data_page);
out4:
@@ -815,7 +815,7 @@ asmlinkage long compat_sys_mount(const char __user * dev_name,
out3:
kfree(kernel_dev);
out2:
- putname(dir_page);
+ putname(dir);
out1:
kfree(kernel_type);
out:
View
14 fs/exec.c
@@ -105,7 +105,7 @@ static inline void put_binfmt(struct linux_binfmt * fmt)
SYSCALL_DEFINE1(uselib, const char __user *, library)
{
struct file *file;
- char *tmp = getname(library);
+ struct filename *tmp = getname(library);
int error = PTR_ERR(tmp);
static const struct open_flags uselib_flags = {
.open_flag = O_LARGEFILE | O_RDONLY | __FMODE_EXEC,
@@ -751,13 +751,14 @@ struct file *open_exec(const char *name)
{
struct file *file;
int err;
+ struct filename tmp = { .name = name };
static const struct open_flags open_exec_flags = {
.open_flag = O_LARGEFILE | O_RDONLY | __FMODE_EXEC,
.acc_mode = MAY_EXEC | MAY_OPEN,
.intent = LOOKUP_OPEN
};
- file = do_filp_open(AT_FDCWD, name, &open_exec_flags, LOOKUP_FOLLOW);
+ file = do_filp_open(AT_FDCWD, &tmp, &open_exec_flags, LOOKUP_FOLLOW);
if (IS_ERR(file))
goto out;
@@ -1664,10 +1665,10 @@ SYSCALL_DEFINE3(execve,
const char __user *const __user *, argv,
const char __user *const __user *, envp)
{
- const char *path = getname(filename);
+ struct filename *path = getname(filename);
int error = PTR_ERR(path);
if (!IS_ERR(path)) {
- error = do_execve(path, argv, envp, current_pt_regs());
+ error = do_execve(path->name, argv, envp, current_pt_regs());
putname(path);
}
return error;
@@ -1677,10 +1678,11 @@ asmlinkage long compat_sys_execve(const char __user * filename,
const compat_uptr_t __user * argv,
const compat_uptr_t __user * envp)
{
- const char *path = getname(filename);
+ struct filename *path = getname(filename);
int error = PTR_ERR(path);
if (!IS_ERR(path)) {
- error = compat_do_execve(path, argv, envp, current_pt_regs());
+ error = compat_do_execve(path->name, argv, envp,
+ current_pt_regs());
putname(path);
}
return error;
View
4 fs/filesystems.c
@@ -124,7 +124,7 @@ EXPORT_SYMBOL(unregister_filesystem);
static int fs_index(const char __user * __name)
{
struct file_system_type * tmp;
- char * name;
+ struct filename *name;
int err, index;
name = getname(__name);
@@ -135,7 +135,7 @@ static int fs_index(const char __user * __name)
err = -EINVAL;
read_lock(&file_systems_lock);
for (tmp=file_systems, index=0 ; tmp ; tmp=tmp->next, index++) {
- if (strcmp(tmp->name,name) == 0) {
+ if (strcmp(tmp->name, name->name) == 0) {
err = index;
break;
}
View
4 fs/internal.h
@@ -97,8 +97,8 @@ struct open_flags {
int acc_mode;
int intent;
};
-extern struct file *do_filp_open(int dfd, const char *pathname,
- const struct open_flags *op, int lookup_flags);
+extern struct file *do_filp_open(int dfd, struct filename *pathname,
+ const struct open_flags *op, int flags);
extern struct file *do_file_open_root(struct dentry *, struct vfsmount *,
const char *, const struct open_flags *, int lookup_flags);
View
213 fs/namei.c
@@ -117,18 +117,70 @@
* POSIX.1 2.4: an empty pathname is invalid (ENOENT).
* PATH_MAX includes the nul terminator --RR.
*/
-static char *getname_flags(const char __user *filename, int flags, int *empty)
+void final_putname(struct filename *name)
{
- char *result = __getname(), *err;
+ if (name->separate) {
+ __putname(name->name);
+ kfree(name);
+ } else {
+ __putname(name);
+ }
+}
+
+#define EMBEDDED_NAME_MAX (PATH_MAX - sizeof(struct filename))
+
+static struct filename *
+getname_flags(const char __user *filename, int flags, int *empty)
+{
+ struct filename *result, *err;
int len;
+ long max;
+ char *kname;
+ result = audit_reusename(filename);
+ if (result)
+ return result;
+
+ result = __getname();
if (unlikely(!result))
return ERR_PTR(-ENOMEM);
- len = strncpy_from_user(result, filename, PATH_MAX);
- err = ERR_PTR(len);
- if (unlikely(len < 0))
+ /*
+ * First, try to embed the struct filename inside the names_cache
+ * allocation
+ */
+ kname = (char *)result + sizeof(*result);
+ result->name = kname;
+ result->separate = false;
+ max = EMBEDDED_NAME_MAX;
+
+recopy:
+ len = strncpy_from_user(kname, filename, max);
+ if (unlikely(len < 0)) {
+ err = ERR_PTR(len);
goto error;
+ }
+
+ /*
+ * Uh-oh. We have a name that's approaching PATH_MAX. Allocate a
+ * separate struct filename so we can dedicate the entire
+ * names_cache allocation for the pathname, and re-do the copy from
+ * userland.
+ */
+ if (len == EMBEDDED_NAME_MAX && max == EMBEDDED_NAME_MAX) {
+ kname = (char *)result;
+
+ result = kzalloc(sizeof(*result), GFP_KERNEL);
+ if (!result) {
+ err = ERR_PTR(-ENOMEM);
+ result = (struct filename *)kname;
+ goto error;
+ }
+ result->name = kname;
+ result->separate = true;
+ max = PATH_MAX;
+ goto recopy;
+ }
/* The empty path is special. */
if (unlikely(!len)) {
@@ -140,30 +192,32 @@ static char *getname_flags(const char __user *filename, int flags, int *empty)
}
err = ERR_PTR(-ENAMETOOLONG);
- if (likely(len < PATH_MAX)) {
- audit_getname(result);
- return result;
- }
+ if (unlikely(len >= PATH_MAX))
+ goto error;
+
+ result->uptr = filename;
+ audit_getname(result);
+ return result;
error:
- __putname(result);
+ final_putname(result);
return err;
}
-char *getname(const char __user * filename)
+struct filename *
+getname(const char __user * filename)
{
return getname_flags(filename, 0, NULL);
}
+EXPORT_SYMBOL(getname);
#ifdef CONFIG_AUDITSYSCALL
-void putname(const char *name)
+void putname(struct filename *name)
{
if (unlikely(!audit_dummy_context()))
- audit_putname(name);
- else
- __putname(name);
+ return audit_putname(name);
+ final_putname(name);
}
-EXPORT_SYMBOL(putname);
#endif
static int check_acl(struct inode *inode, int mask)
@@ -1963,24 +2017,29 @@ static int path_lookupat(int dfd, const char *name,
return err;
}
-static int do_path_lookup(int dfd, const char *name,
+static int filename_lookup(int dfd, struct filename *name,
unsigned int flags, struct nameidata *nd)
{
- int retval = path_lookupat(dfd, name, flags | LOOKUP_RCU, nd);
+ int retval = path_lookupat(dfd, name->name, flags | LOOKUP_RCU, nd);
if (unlikely(retval == -ECHILD))
- retval = path_lookupat(dfd, name, flags, nd);
+ retval = path_lookupat(dfd, name->name, flags, nd);
if (unlikely(retval == -ESTALE))
- retval = path_lookupat(dfd, name, flags | LOOKUP_REVAL, nd);
+ retval = path_lookupat(dfd, name->name,
+ flags | LOOKUP_REVAL, nd);
- if (likely(!retval)) {
- if (unlikely(!audit_dummy_context())) {
- if (nd->path.dentry && nd->inode)
- audit_inode(name, nd->path.dentry);
- }
- }
+ if (likely(!retval))
+ audit_inode(name, nd->path.dentry, flags & LOOKUP_PARENT);
return retval;
}
+static int do_path_lookup(int dfd, const char *name,
+ unsigned int flags, struct nameidata *nd)
+{
+ struct filename filename = { .name = name };
+
+ return filename_lookup(dfd, &filename, flags, nd);
+}
+
/* does lookup, returns the object with parent locked */
struct dentry *kern_path_locked(const char *name, struct path *path)
{
@@ -2098,13 +2157,13 @@ int user_path_at_empty(int dfd, const char __user *name, unsigned flags,
struct path *path, int *empty)
{
struct nameidata nd;
- char *tmp = getname_flags(name, flags, empty);
+ struct filename *tmp = getname_flags(name, flags, empty);
int err = PTR_ERR(tmp);
if (!IS_ERR(tmp)) {
BUG_ON(flags & LOOKUP_PARENT);
- err = do_path_lookup(dfd, tmp, flags, &nd);
+ err = filename_lookup(dfd, tmp, flags, &nd);
putname(tmp);
if (!err)
*path = nd.path;
@@ -2118,22 +2177,28 @@ int user_path_at(int dfd, const char __user *name, unsigned flags,
return user_path_at_empty(dfd, name, flags, path, NULL);
}
-static int user_path_parent(int dfd, const char __user *path,
- struct nameidata *nd, char **name)
+/*
+ * NB: most callers don't do anything directly with the reference to the
+ * to struct filename, but the nd->last pointer points into the name string
+ * allocated by getname. So we must hold the reference to it until all
+ * path-walking is complete.
+ */
+static struct filename *
+user_path_parent(int dfd, const char __user *path, struct nameidata *nd)
{
- char *s = getname(path);
+ struct filename *s = getname(path);
int error;
if (IS_ERR(s))
- return PTR_ERR(s);
+ return s;
- error = do_path_lookup(dfd, s, LOOKUP_PARENT, nd);
- if (error)
+ error = filename_lookup(dfd, s, LOOKUP_PARENT, nd);
+ if (error) {
putname(s);
- else
- *name = s;
+ return ERR_PTR(error);
+ }
- return error;
+ return s;
}
/*
@@ -2180,7 +2245,7 @@ static int may_delete(struct inode *dir,struct dentry *victim,int isdir)
return -ENOENT;
BUG_ON(victim->d_parent->d_inode != dir);
- audit_inode_child(victim, dir);
+ audit_inode_child(dir, victim, AUDIT_TYPE_CHILD_DELETE);
error = inode_permission(dir, MAY_WRITE | MAY_EXEC);
if (error)
@@ -2625,7 +2690,7 @@ static int lookup_open(struct nameidata *nd, struct path *path,
*/
static int do_last(struct nameidata *nd, struct path *path,
struct file *file, const struct open_flags *op,
- int *opened, const char *pathname)
+ int *opened, struct filename *name)
{
struct dentry *dir = nd->path.dentry;
int open_flag = op->open_flag;
@@ -2652,7 +2717,7 @@ static int do_last(struct nameidata *nd, struct path *path,
error = complete_walk(nd);
if (error)
return error;
- audit_inode(pathname, nd->path.dentry);
+ audit_inode(name, nd->path.dentry, 0);
if (open_flag & O_CREAT) {
error = -EISDIR;
goto out;
@@ -2662,7 +2727,7 @@ static int do_last(struct nameidata *nd, struct path *path,
error = complete_walk(nd);
if (error)
return error;
- audit_inode(pathname, dir);
+ audit_inode(name, dir, 0);
goto finish_open;
}
@@ -2691,7 +2756,7 @@ static int do_last(struct nameidata *nd, struct path *path,
if (error)
return error;
- audit_inode(pathname, dir);
+ audit_inode(name, dir, 0);
error = -EISDIR;
/* trailing slashes? */
if (nd->last.name[nd->last.len])
@@ -2721,7 +2786,7 @@ static int do_last(struct nameidata *nd, struct path *path,
!S_ISREG(file->f_path.dentry->d_inode->i_mode))
will_truncate = false;
- audit_inode(pathname, file->f_path.dentry);
+ audit_inode(name, file->f_path.dentry, 0);
goto opened;
}
@@ -2738,7 +2803,7 @@ static int do_last(struct nameidata *nd, struct path *path,
* create/update audit record if it already exists.
*/
if (path->dentry->d_inode)
- audit_inode(pathname, path->dentry);
+ audit_inode(name, path->dentry, 0);
/*
* If atomic_open() acquired write access it is dropped now due to
@@ -2803,7 +2868,7 @@ static int do_last(struct nameidata *nd, struct path *path,
error = -ENOTDIR;
if ((nd->flags & LOOKUP_DIRECTORY) && !nd->inode->i_op->lookup)
goto out;
- audit_inode(pathname, nd->path.dentry);
+ audit_inode(name, nd->path.dentry, 0);
finish_open:
if (!S_ISREG(nd->inode->i_mode))
will_truncate = false;
@@ -2871,7 +2936,7 @@ static int do_last(struct nameidata *nd, struct path *path,
goto retry_lookup;
}
-static struct file *path_openat(int dfd, const char *pathname,
+static struct file *path_openat(int dfd, struct filename *pathname,
struct nameidata *nd, const struct open_flags *op, int flags)
{
struct file *base = NULL;
@@ -2886,12 +2951,12 @@ static struct file *path_openat(int dfd, const char *pathname,
file->f_flags = op->open_flag;
- error = path_init(dfd, pathname, flags | LOOKUP_PARENT, nd, &base);
+ error = path_init(dfd, pathname->name, flags | LOOKUP_PARENT, nd, &base);
if (unlikely(error))
goto out;
current->total_link_count = 0;
- error = link_path_walk(pathname, nd);
+ error = link_path_walk(pathname->name, nd);
if (unlikely(error))
goto out;
@@ -2937,7 +3002,7 @@ static struct file *path_openat(int dfd, const char *pathname,
return file;
}
-struct file *do_filp_open(int dfd, const char *pathname,
+struct file *do_filp_open(int dfd, struct filename *pathname,
const struct open_flags *op, int flags)
{
struct nameidata nd;
@@ -2956,6 +3021,7 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
{
struct nameidata nd;
struct file *file;
+ struct filename filename = { .name = name };
nd.root.mnt = mnt;
nd.root.dentry = dentry;
@@ -2965,11 +3031,11 @@ struct file *do_file_open_root(struct dentry *dentry, struct vfsmount *mnt,
if (dentry->d_inode->i_op->follow_link && op->intent & LOOKUP_OPEN)
return ERR_PTR(-ELOOP);
- file = path_openat(-1, name, &nd, op, flags | LOOKUP_RCU);
+ file = path_openat(-1, &filename, &nd, op, flags | LOOKUP_RCU);
if (unlikely(file == ERR_PTR(-ECHILD)))
- file = path_openat(-1, name, &nd, op, flags);
+ file = path_openat(-1, &filename, &nd, op, flags);
if (unlikely(file == ERR_PTR(-ESTALE)))
- file = path_openat(-1, name, &nd, op, flags | LOOKUP_REVAL);
+ file = path_openat(-1, &filename, &nd, op, flags | LOOKUP_REVAL);
return file;
}
@@ -3044,11 +3110,11 @@ EXPORT_SYMBOL(done_path_create);
struct dentry *user_path_create(int dfd, const char __user *pathname, struct path *path, int is_dir)
{
- char *tmp = getname(pathname);
+ struct filename *tmp = getname(pathname);
struct dentry *res;
if (IS_ERR(tmp))
return ERR_CAST(tmp);
- res = kern_path_create(dfd, tmp, path, is_dir);
+ res = kern_path_create(dfd, tmp->name, path, is_dir);
putname(tmp);
return res;
}
@@ -3253,13 +3319,13 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
static long do_rmdir(int dfd, const char __user *pathname)
{
int error = 0;
- char * name;
+ struct filename *name;
struct dentry *dentry;
struct nameidata nd;
- error = user_path_parent(dfd, pathname, &nd, &name);
- if (error)
- return error;
+ name = user_path_parent(dfd, pathname, &nd);
+ if (IS_ERR(name))
+ return PTR_ERR(name);
switch(nd.last_type) {
case LAST_DOTDOT:
@@ -3348,14 +3414,14 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry)
static long do_unlinkat(int dfd, const char __user *pathname)
{
int error;
- char *name;
+ struct filename *name;
struct dentry *dentry;
struct nameidata nd;
struct inode *inode = NULL;
- error = user_path_parent(dfd, pathname, &nd, &name);
- if (error)
- return error;
+ name = user_path_parent(dfd, pathname, &nd);
+ if (IS_ERR(name))
+ return PTR_ERR(name);
error = -EISDIR;
if (nd.last_type != LAST_NORM)
@@ -3439,7 +3505,7 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
int, newdfd, const char __user *, newname)
{
int error;
- char *from;
+ struct filename *from;
struct dentry *dentry;
struct path path;
@@ -3452,9 +3518,9 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
if (IS_ERR(dentry))
goto out_putname;
- error = security_path_symlink(&path, dentry, from);
+ error = security_path_symlink(&path, dentry, from->name);
if (!error)
- error = vfs_symlink(path.dentry->d_inode, dentry, from);
+ error = vfs_symlink(path.dentry->d_inode, dentry, from->name);
done_path_create(&path, dentry);
out_putname:
putname(from);
@@ -3734,17 +3800,21 @@ SYSCALL_DEFINE4(renameat, int, olddfd, const char __user *, oldname,
struct dentry *old_dentry, *new_dentry;
struct dentry *trap;
struct nameidata oldnd, newnd;
- char *from;
- char *to;
+ struct filename *from;
+ struct filename *to;
int error;
- error = user_path_parent(olddfd, oldname, &oldnd, &from);
- if (error)
+ from = user_path_parent(olddfd, oldname, &oldnd);
+ if (IS_ERR(from)) {
+ error = PTR_ERR(from);
goto exit;
+ }
- error = user_path_parent(newdfd, newname, &newnd, &to);
- if (error)
+ to = user_path_parent(newdfd, newname, &newnd);
+ if (IS_ERR(to)) {
+ error = PTR_ERR(to);
goto exit1;
+ }
error = -EXDEV;
if (oldnd.path.mnt != newnd.path.mnt)
@@ -3968,7 +4038,6 @@ EXPORT_SYMBOL(follow_down_one);
EXPORT_SYMBOL(follow_down);
EXPORT_SYMBOL(follow_up);
EXPORT_SYMBOL(get_write_access); /* nfsd */
-EXPORT_SYMBOL(getname);
EXPORT_SYMBOL(lock_rename);
EXPORT_SYMBOL(lookup_one_len);
EXPORT_SYMBOL(page_follow_link_light);
View
4 fs/namespace.c
@@ -2408,7 +2408,7 @@ SYSCALL_DEFINE5(mount, char __user *, dev_name, char __user *, dir_name,
{
int ret;
char *kernel_type;
- char *kernel_dir;
+ struct filename *kernel_dir;
char *kernel_dev;
unsigned long data_page;
@@ -2430,7 +2430,7 @@ SYSCALL_DEFINE5(mount, char __user *, dev_name, char __user *, dir_name,
if (ret < 0)
goto out_data;
- ret = do_mount(kernel_dev, kernel_dir, kernel_type, flags,
+ ret = do_mount(kernel_dev, kernel_dir->name, kernel_type, flags,
(void *) data_page);
free_page(data_page);
View
29 fs/open.c
@@ -478,7 +478,7 @@ SYSCALL_DEFINE2(fchmod, unsigned int, fd, umode_t, mode)
file = fget(fd);
if (file) {
- audit_inode(NULL, file->f_path.dentry);
+ audit_inode(NULL, file->f_path.dentry, 0);
err = chmod_common(&file->f_path, mode);
fput(file);
}
@@ -588,7 +588,7 @@ SYSCALL_DEFINE3(fchown, unsigned int, fd, uid_t, user, gid_t, group)
error = mnt_want_write_file(f.file);
if (error)
goto out_fput;
- audit_inode(NULL, f.file->f_path.dentry);
+ audit_inode(NULL, f.file->f_path.dentry, 0);
error = chown_common(&f.file->f_path, user, group);
mnt_drop_write_file(f.file);
out_fput:
@@ -859,6 +859,24 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
}
/**
+ * file_open_name - open file and return file pointer
+ *
+ * @name: struct filename containing path to open
+ * @flags: open flags as per the open(2) second argument
+ * @mode: mode for the new file if O_CREAT is set, else ignored
+ *
+ * This is the helper to open a file from kernelspace if you really
+ * have to. But in generally you should not do this, so please move
+ * along, nothing to see here..
+ */
+struct file *file_open_name(struct filename *name, int flags, umode_t mode)
+{
+ struct open_flags op;
+ int lookup = build_open_flags(flags, mode, &op);
+ return do_filp_open(AT_FDCWD, name, &op, lookup);
+}
+
+/**
* filp_open - open file and return file pointer
*
* @filename: path to open
@@ -871,9 +889,8 @@ static inline int build_open_flags(int flags, umode_t mode, struct open_flags *o
*/
struct file *filp_open(const char *filename, int flags, umode_t mode)
{
- struct open_flags op;
- int lookup = build_open_flags(flags, mode, &op);
- return do_filp_open(AT_FDCWD, filename, &op, lookup);
+ struct filename name = {.name = filename};
+ return file_open_name(&name, flags, mode);
}
EXPORT_SYMBOL(filp_open);
@@ -895,7 +912,7 @@ long do_sys_open(int dfd, const char __user *filename, int flags, umode_t mode)
{
struct open_flags op;
int lookup = build_open_flags(flags, mode, &op);
- char *tmp = getname(filename);
+ struct filename *tmp = getname(filename);
int fd = PTR_ERR(tmp);
if (!IS_ERR(tmp)) {
View
5 fs/proc/base.c
@@ -2258,7 +2258,8 @@ static void *proc_self_follow_link(struct dentry *dentry, struct nameidata *nd)
pid_t tgid = task_tgid_nr_ns(current, ns);
char *name = ERR_PTR(-ENOENT);
if (tgid) {
- name = __getname();
+ /* 11 for max length of signed int in decimal + NULL term */
+ name = kmalloc(12, GFP_KERNEL);
if (!name)
name = ERR_PTR(-ENOMEM);
else
@@ -2273,7 +2274,7 @@ static void proc_self_put_link(struct dentry *dentry, struct nameidata *nd,
{
char *s = nd_get_link(nd);
if (!IS_ERR(s))
- __putname(s);
+ kfree(s);
}
static const struct inode_operations proc_self_inode_operations = {
View
4 fs/quota/quota.c
@@ -331,11 +331,11 @@ static struct super_block *quotactl_block(const char __user *special, int cmd)
#ifdef CONFIG_BLOCK
struct block_device *bdev;
struct super_block *sb;
- char *tmp = getname(special);
+ struct filename *tmp = getname(special);
if (IS_ERR(tmp))
return ERR_CAST(tmp);
- bdev = lookup_bdev(tmp);
+ bdev = lookup_bdev(tmp->name);
putname(tmp);
if (IS_ERR(bdev))
return ERR_CAST(bdev);
View
8 fs/xattr.c
@@ -412,7 +412,7 @@ SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name,
if (!f.file)
return error;
dentry = f.file->f_path.dentry;
- audit_inode(NULL, dentry);
+ audit_inode(NULL, dentry, 0);
error = mnt_want_write_file(f.file);
if (!error) {
error = setxattr(dentry, name, value, size, flags);
@@ -507,7 +507,7 @@ SYSCALL_DEFINE4(fgetxattr, int, fd, const char __user *, name,
if (!f.file)
return error;
- audit_inode(NULL, f.file->f_path.dentry);
+ audit_inode(NULL, f.file->f_path.dentry, 0);
error = getxattr(f.file->f_path.dentry, name, value, size);
fdput(f);
return error;
@@ -586,7 +586,7 @@ SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t, size)
if (!f.file)
return error;
- audit_inode(NULL, f.file->f_path.dentry);
+ audit_inode(NULL, f.file->f_path.dentry, 0);
error = listxattr(f.file->f_path.dentry, list, size);
fdput(f);
return error;
@@ -655,7 +655,7 @@ SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
if (!f.file)
return error;
dentry = f.file->f_path.dentry;
- audit_inode(NULL, dentry);
+ audit_inode(NULL, dentry, 0);
error = mnt_want_write_file(f.file);
if (!error) {
error = removexattr(dentry, name);
View
69 include/linux/audit.h
@@ -452,6 +452,16 @@ struct audit_field {
extern int __init audit_register_class(int class, unsigned *list);
extern int audit_classify_syscall(int abi, unsigned syscall);
extern int audit_classify_arch(int arch);
+
+/* audit_names->type values */
+#define AUDIT_TYPE_UNKNOWN 0 /* we don't know yet */
+#define AUDIT_TYPE_NORMAL 1 /* a "normal" audit record */
+#define AUDIT_TYPE_PARENT 2 /* a parent audit record */
+#define AUDIT_TYPE_CHILD_DELETE 3 /* a child being deleted */
+#define AUDIT_TYPE_CHILD_CREATE 4 /* a child being created */
+
+struct filename;
+
#ifdef CONFIG_AUDITSYSCALL
/* These are defined in auditsc.c */
/* Public API */
@@ -461,11 +471,14 @@ extern void __audit_syscall_entry(int arch,
int major, unsigned long a0, unsigned long a1,
unsigned long a2, unsigned long a3);
extern void __audit_syscall_exit(int ret_success, long ret_value);
-extern void __audit_getname(const char *name);
-extern void audit_putname(const char *name);
-extern void __audit_inode(const char *name, const struct dentry *dentry);
-extern void __audit_inode_child(const struct dentry *dentry,
- const struct inode *parent);
+extern struct filename *__audit_reusename(const __user char *uptr);
+extern void __audit_getname(struct filename *name);
+extern void audit_putname(struct filename *name);
+extern void __audit_inode(struct filename *name, const struct dentry *dentry,
+ unsigned int parent);
+extern void __audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry,
+ const unsigned char type);
extern void __audit_seccomp(unsigned long syscall, long signr, int code);
extern void __audit_ptrace(struct task_struct *t);
@@ -495,19 +508,27 @@ static inline void audit_syscall_exit(void *pt_regs)
__audit_syscall_exit(success, return_code);
}
}
-static inline void audit_getname(const char *name)
+static inline struct filename *audit_reusename(const __user char *name)
+{
+ if (unlikely(!audit_dummy_context()))
+ return __audit_reusename(name);
+ return NULL;
+}
+static inline void audit_getname(struct filename *name)
{
if (unlikely(!audit_dummy_context()))
__audit_getname(name);
}
-static inline void audit_inode(const char *name, const struct dentry *dentry) {
+static inline void audit_inode(struct filename *name, const struct dentry *dentry,
+ unsigned int parent) {
if (unlikely(!audit_dummy_context()))
- __audit_inode(name, dentry);
+ __audit_inode(name, dentry, parent);
}
-static inline void audit_inode_child(const struct dentry *dentry,
- const struct inode *parent) {
+static inline void audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry,
+ const unsigned char type) {
if (unlikely(!audit_dummy_context()))
- __audit_inode_child(dentry, parent);
+ __audit_inode_child(parent, dentry, type);
}
void audit_core_dumps(long signr);
@@ -651,19 +672,29 @@ static inline int audit_dummy_context(void)
{
return 1;
}
-static inline void audit_getname(const char *name)
+static inline struct filename *audit_reusename(const __user char *name)
+{
+ return NULL;
+}
+static inline void audit_getname(struct filename *name)
{ }
-static inline void audit_putname(const char *name)
+static inline void audit_putname(struct filename *name)
{ }
-static inline void __audit_inode(const char *name, const struct dentry *dentry)
+static inline void __audit_inode(struct filename *name,
+ const struct dentry *dentry,
+ unsigned int parent)
{ }
-static inline void __audit_inode_child(const struct dentry *dentry,
- const struct inode *parent)
+static inline void __audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry,
+ const unsigned char type)
{ }
-static inline void audit_inode(const char *name, const struct dentry *dentry)
+static inline void audit_inode(struct filename *name,
+ const struct dentry *dentry,
+ unsigned int parent)
{ }
-static inline void audit_inode_child(const struct dentry *dentry,
- const struct inode *parent)
+static inline void audit_inode_child(const struct inode *parent,
+ const struct dentry *dentry,
+ const unsigned char type)
{ }
static inline void audit_core_dumps(long signr)
{ }
View
21 include/linux/fs.h
@@ -2196,6 +2196,13 @@ static inline int break_lease(struct inode *inode, unsigned int mode)
#endif /* CONFIG_FILE_LOCKING */
/* fs/open.c */
+struct audit_names;
+struct filename {
+ const char *name; /* pointer to actual string */
+ const __user char *uptr; /* original userland pointer */
+ struct audit_names *aname;
+ bool separate; /* should "name" be freed? */
+};
extern int do_truncate(struct dentry *, loff_t start, unsigned int time_attrs,
struct file *filp);
@@ -2203,12 +2210,15 @@ extern int do_fallocate(struct file *file, int mode, loff_t offset,
loff_t len);
extern long do_sys_open(int dfd, const char __user *filename, int flags,
umode_t mode);
+extern struct file *file_open_name(struct filename *, int, umode_t);
extern struct file *filp_open(const char *, int, umode_t);
extern struct file *file_open_root(struct dentry *, struct vfsmount *,
const char *, int);
extern struct file * dentry_open(const struct path *, int, const struct cred *);
extern int filp_close(struct file *, fl_owner_t id);
-extern char * getname(const char __user *);
+
+extern struct filename *getname(const char __user *);
+
enum {
FILE_CREATED = 1,
FILE_OPENED = 2
@@ -2228,13 +2238,14 @@ extern void __init vfs_caches_init(unsigned long);
extern struct kmem_cache *names_cachep;
-#define __getname_gfp(gfp) kmem_cache_alloc(names_cachep, (gfp))
-#define __getname() __getname_gfp(GFP_KERNEL)
+extern void final_putname(struct filename *name);
+
+#define __getname() kmem_cache_alloc(names_cachep, GFP_KERNEL)
#define __putname(name) kmem_cache_free(names_cachep, (void *)(name))
#ifndef CONFIG_AUDITSYSCALL
-#define putname(name) __putname(name)
+#define putname(name) final_putname(name)
#else
-extern void putname(const char *name);
+extern void putname(struct filename *name);
#endif
#ifdef CONFIG_BLOCK
View
8 include/linux/fsnotify.h
@@ -109,7 +109,7 @@ static inline void fsnotify_move(struct inode *old_dir, struct inode *new_dir,
if (source)
fsnotify(source, FS_MOVE_SELF, moved->d_inode, FSNOTIFY_EVENT_INODE, NULL, 0);
- audit_inode_child(moved, new_dir);
+ audit_inode_child(new_dir, moved, AUDIT_TYPE_CHILD_CREATE);
}
/*
@@ -155,7 +155,7 @@ static inline void fsnotify_inoderemove(struct inode *inode)
*/
static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
{
- audit_inode_child(dentry, inode);
+ audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
fsnotify(inode, FS_CREATE, dentry->d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
}
@@ -168,7 +168,7 @@ static inline void fsnotify_create(struct inode *inode, struct dentry *dentry)
static inline void fsnotify_link(struct inode *dir, struct inode *inode, struct dentry *new_dentry)
{
fsnotify_link_count(inode);
- audit_inode_child(new_dentry, dir);
+ audit_inode_child(dir, new_dentry, AUDIT_TYPE_CHILD_CREATE);
fsnotify(dir, FS_CREATE, inode, FSNOTIFY_EVENT_INODE, new_dentry->d_name.name, 0);
}
@@ -181,7 +181,7 @@ static inline void fsnotify_mkdir(struct inode *inode, struct dentry *dentry)
__u32 mask = (FS_CREATE | FS_ISDIR);
struct inode *d_inode = dentry->d_inode;
- audit_inode_child(dentry, inode);
+ audit_inode_child(inode, dentry, AUDIT_TYPE_CHILD_CREATE);
fsnotify(inode, mask, d_inode, FSNOTIFY_EVENT_INODE, dentry->d_name.name, 0);
}
View
7 init/do_mounts.c
@@ -353,8 +353,9 @@ static int __init do_mount_root(char *name, char *fs, int flags, void *data)
void __init mount_block_root(char *name, int flags)
{
- char *fs_names = __getname_gfp(GFP_KERNEL
- | __GFP_NOTRACK_FALSE_POSITIVE);
+ struct page *page = alloc_page(GFP_KERNEL |
+ __GFP_NOTRACK_FALSE_POSITIVE);
+ char *fs_names = page_address(page);
char *p;
#ifdef CONFIG_BLOCK
char b[BDEVNAME_SIZE];
@@ -406,7 +407,7 @@ void __init mount_block_root(char *name, int flags)
#endif
panic("VFS: Unable to mount root fs on %s", b);
out:
- putname(fs_names);
+ put_page(page);
}
#ifdef CONFIG_ROOT_NFS
View
17 ipc/mqueue.c
@@ -772,7 +772,7 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
{
struct path path;
struct file *filp;
- char *name;
+ struct filename *name;
struct mq_attr attr;
int fd, error;
struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
@@ -795,7 +795,7 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
ro = mnt_want_write(mnt); /* we'll drop it in any case */
error = 0;
mutex_lock(&root->d_inode->i_mutex);
- path.dentry = lookup_one_len(name, root, strlen(name));
+ path.dentry = lookup_one_len(name->name, root, strlen(name->name));
if (IS_ERR(path.dentry)) {
error = PTR_ERR(path.dentry);
goto out_putfd;
@@ -804,7 +804,7 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
if (oflag & O_CREAT) {
if (path.dentry->d_inode) { /* entry already exists */
- audit_inode(name, path.dentry);
+ audit_inode(name, path.dentry, 0);
if (oflag & O_EXCL) {
error = -EEXIST;
goto out;
@@ -824,7 +824,7 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
error = -ENOENT;
goto out;
}
- audit_inode(name, path.dentry);
+ audit_inode(name, path.dentry, 0);
filp = do_open(&path, oflag);
}
@@ -849,7 +849,7 @@ SYSCALL_DEFINE4(mq_open, const char __user *, u_name, int, oflag, umode_t, mode,
SYSCALL_DEFINE1(mq_unlink, const char __user *, u_name)
{
int err;
- char *name;
+ struct filename *name;
struct dentry *dentry;
struct inode *inode = NULL;
struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
@@ -863,7 +863,8 @@ SYSCALL_DEFINE1(mq_unlink, const char __user *, u_name)
if (err)
goto out_name;
mutex_lock_nested(&mnt->mnt_root->d_inode->i_mutex, I_MUTEX_PARENT);
- dentry = lookup_one_len(name, mnt->mnt_root, strlen(name));
+ dentry = lookup_one_len(name->name, mnt->mnt_root,
+ strlen(name->name));
if (IS_ERR(dentry)) {
err = PTR_ERR(dentry);
goto out_unlock;
@@ -978,7 +979,7 @@ SYSCALL_DEFINE5(mq_timedsend, mqd_t, mqdes, const char __user *, u_msg_ptr,
goto out_fput;
}
info = MQUEUE_I(inode);
- audit_inode(NULL, f.file->f_path.dentry);
+ audit_inode(NULL, f.file->f_path.dentry, 0);
if (unlikely(!(f.file->f_mode & FMODE_WRITE))) {
ret = -EBADF;
@@ -1094,7 +1095,7 @@ SYSCALL_DEFINE5(mq_timedreceive, mqd_t, mqdes, char __user *, u_msg_ptr,
goto out_fput;
}
info = MQUEUE_I(inode);
- audit_inode(NULL, f.file->f_path.dentry);
+ audit_inode(NULL, f.file->f_path.dentry, 0);
if (unlikely(!(f.file->f_mode & FMODE_READ))) {
ret = -EBADF;
View
6 kernel/acct.c
@@ -193,7 +193,7 @@ static void acct_file_reopen(struct bsd_acct_struct *acct, struct file *file,
}
}
-static int acct_on(char *name)
+static int acct_on(struct filename *pathname)
{
struct file *file;
struct vfsmount *mnt;
@@ -201,7 +201,7 @@ static int acct_on(char *name)
struct bsd_acct_struct *acct = NULL;
/* Difference from BSD - they don't do O_APPEND */
- file = filp_open(name, O_WRONLY|O_APPEND|O_LARGEFILE, 0);
+ file = file_open_name(pathname, O_WRONLY|O_APPEND|O_LARGEFILE, 0);
if (IS_ERR(file))
return PTR_ERR(file);
@@ -260,7 +260,7 @@ SYSCALL_DEFINE1(acct, const char __user *, name)
return -EPERM;
if (name) {
- char *tmp = getname(name);
+ struct filename *tmp = getname(name);
if (IS_ERR(tmp))
return (PTR_ERR(tmp));
error = acct_on(tmp);
View
7 kernel/audit.h
@@ -74,12 +74,15 @@ static inline int audit_hash_ino(u32 ino)
return (ino & (AUDIT_INODE_BUCKETS-1));
}
+/* Indicates that audit should log the full pathname. */
+#define AUDIT_NAME_FULL -1
+
extern int audit_match_class(int class, unsigned syscall);
extern int audit_comparator(const u32 left, const u32 op, const u32 right);
extern int audit_uid_comparator(kuid_t left, u32 op, kuid_t right);
extern int audit_gid_comparator(kgid_t left, u32 op, kgid_t right);
-extern int audit_compare_dname_path(const char *dname, const char *path,
- int *dirlen);
+extern int parent_len(const char *path);
+extern int audit_compare_dname_path(const char *dname, const char *path, int plen);
extern struct sk_buff * audit_make_reply(int pid, int seq, int type,
int done, int multi,
const void *payload, int size);
View
3  kernel/audit_watch.c
@@ -265,7 +265,8 @@ static void audit_update_watch(struct audit_parent *parent,
/* Run all of the watches on this parent looking for the one that
* matches the given dname */
list_for_each_entry_safe(owatch, nextw, &parent->watches, wlist) {
- if (audit_compare_dname_path(dname, owatch->path, NULL))
+ if (audit_compare_dname_path(dname, owatch->path,
+ AUDIT_NAME_FULL))
continue;
/* If the update involves invalidating rules, do the inode-based
View
65 kernel/auditfilter.c
@@ -1298,41 +1298,60 @@ int audit_gid_comparator(kgid_t left, u32 op, kgid_t right)
}
}
-/* Compare given dentry name with last component in given path,
- * return of 0 indicates a match. */
-int audit_compare_dname_path(const char *dname, const char *path,
- int *dirlen)
+/**
+ * parent_len - find the length of the parent portion of a pathname
+ * @path: pathname of which to determine length
+ */
+int parent_len(const char *path)
{
- int dlen, plen;
+ int plen;
const char *p;
- if (!dname || !path)
- return 1;
-
- dlen = strlen(dname);
plen = strlen(path);
- if (plen < dlen)
- return 1;
+
+ if (plen == 0)
+ return plen;
/* disregard trailing slashes */
p = path + plen - 1;
while ((*p == '/') && (p > path))
p--;
- /* find last path component */
- p = p - dlen + 1;
- if (p < path)
+ /* walk backward until we find the next slash or hit beginning */
+ while ((*p != '/') && (p > path))
+ p--;
+
+ /* did we find a slash? Then increment to include it in path */
+ if (*p == '/')
+ p++;
+
+ return p - path;
+}
+
+/**
+ * audit_compare_dname_path - compare given dentry name with last component in
+ * given path. Return of 0 indicates a match.
+ * @dname: dentry name that we're comparing
+ * @path: full pathname that we're comparing
+ * @parentlen: length of the parent if known. Passing in AUDIT_NAME_FULL
+ * here indicates that we must compute this value.
+ */
+int audit_compare_dname_path(const char *dname, const char *path, int parentlen)
+{
+ int dlen, pathlen;
+ const char *p;
+
+ dlen = strlen(dname);
+ pathlen = strlen(path);
+ if (pathlen < dlen)
return 1;
- else if (p > path) {
- if (*--p != '/')
- return 1;
- else
- p++;
- }
- /* return length of path's directory component */
- if (dirlen)
- *dirlen = p - path;
+ parentlen = parentlen == AUDIT_NAME_FULL ? parent_len(path) : parentlen;
+ if (pathlen - parentlen != dlen)
+ return 1;
+
+ p = path + parentlen;
+
return strncmp(p, dname, dlen);
}
View
217 kernel/auditsc.c
@@ -81,9 +81,6 @@
* a name dynamically and also add those to the list anchored by names_list. */
#define AUDIT_NAMES 5
-/* Indicates that audit should log the full pathname. */
-#define AUDIT_NAME_FULL -1
-
/* no execve audit message should be longer than this (userspace limits) */
#define MAX_EXECVE_AUDIT_LEN 7500
@@ -106,27 +103,29 @@ struct audit_cap_data {
* we don't let putname() free it (instead we free all of the saved
* pointers at syscall exit time).
*
- * Further, in fs/namei.c:path_lookup() we store the inode and device. */
+ * Further, in fs/namei.c:path_lookup() we store the inode and device.
+ */
struct audit_names {
- struct list_head list; /* audit_context->names_list */
- const char *name;
- unsigned long ino;
- dev_t dev;
- umode_t mode;
- kuid_t uid;
- kgid_t gid;
- dev_t rdev;
- u32 osid;
- struct audit_cap_data fcap;
- unsigned int fcap_ver;
- int name_len; /* number of name's characters to log */
- bool name_put; /* call __putname() for this name */
+ struct list_head list; /* audit_context->names_list */
+ struct filename *name;
+ unsigned long ino;
+ dev_t dev;
+ umode_t mode;
+ kuid_t uid;
+ kgid_t gid;
+ dev_t rdev;
+ u32 osid;
+ struct audit_cap_data fcap;
+ unsigned int fcap_ver;
+ int name_len; /* number of name's characters to log */
+ unsigned char type; /* record type */
+ bool name_put; /* call __putname() for this name */
/*
* This was an allocated audit_names and not from the array of
* names allocated in the task audit context. Thus this name
* should be freed on syscall exit
*/
- bool should_free;
+ bool should_free;
};
struct audit_aux_data {
@@ -998,7 +997,7 @@ static inline void audit_free_names(struct audit_context *context)
context->ino_count);
list_for_each_entry(n, &context->names_list, list) {
printk(KERN_ERR "names[%d] = %p = %s\n", i,
- n->name, n->name ?: "(null)");
+ n->name, n->name->name ?: "(null)");
}
dump_stack();
return;
@@ -1555,7 +1554,7 @@ static void audit_log_name(struct audit_context *context, struct audit_names *n,
case AUDIT_NAME_FULL:
/* log the full path */
audit_log_format(ab, " name=");
- audit_log_untrustedstring(ab, n->name);
+ audit_log_untrustedstring(ab, n->name->name);
break;
case 0:
/* name was specified as a relative path and the
@@ -1565,7 +1564,7 @@ static void audit_log_name(struct audit_context *context, struct audit_names *n,
default:
/* log the name's directory component */
audit_log_format(ab, " name=");
- audit_log_n_untrustedstring(ab, n->name,
+ audit_log_n_untrustedstring(ab, n->name->name,
n->name_len);
}
} else
@@ -1995,7 +1994,8 @@ static void handle_path(const struct dentry *dentry)
#endif
}
-static struct audit_names *audit_alloc_name(struct audit_context *context)
+static struct audit_names *audit_alloc_name(struct audit_context *context,
+ unsigned char type)
{
struct audit_names *aname;
@@ -2010,6 +2010,7 @@ static struct audit_names *audit_alloc_name(struct audit_context *context)
}
aname->ino = (unsigned long)-1;
+ aname->type = type;
list_add_tail(&aname->list, &context->names_list);
context->name_count++;
@@ -2020,13 +2021,36 @@ static struct audit_names *audit_alloc_name(struct audit_context *context)
}
/**
+ * audit_reusename - fill out filename with info from existing entry
+ * @uptr: userland ptr to pathname
+ *
+ * Search the audit_names list for the current audit context. If there is an
+ * existing entry with a matching "uptr" then return the filename
+ * associated with that audit_name. If not, return NULL.
+ */
+struct filename *
+__audit_reusename(const __user char *uptr)
+{
+ struct audit_context *context = current->audit_context;
+ struct audit_names *n;
+
+ list_for_each_entry(n, &context->names_list, list) {
+ if (!n->name)
+ continue;
+ if (n->name->uptr == uptr)
+ return n->name;
+ }
+ return NULL;
+}
+
+/**
* audit_getname - add a name to the list
* @name: name to add
*
* Add a name to the list of audit names for this context.
* Called from fs/namei.c:getname().
*/
-void __audit_getname(const char *name)
+void __audit_getname(struct filename *name)
{
struct audit_context *context = current->audit_context;
struct audit_names *n;
@@ -2040,13 +2064,19 @@ void __audit_getname(const char *name)
return;
}
- n = audit_alloc_name(context);
+#if AUDIT_DEBUG
+ /* The filename _must_ have a populated ->name */
+ BUG_ON(!name->name);
+#endif
+
+ n = audit_alloc_name(context, AUDIT_TYPE_UNKNOWN);
if (!n)
return;
n->name = name;
n->name_len = AUDIT_NAME_FULL;
n->name_put = true;
+ name->aname = n;
if (!context->pwd.dentry)
get_fs_pwd(current->fs, &context->pwd);
@@ -2059,7 +2089,7 @@ void __audit_getname(const char *name)
* then we delay the putname until syscall exit.
* Called from include/linux/fs.h:putname().
*/
-void audit_putname(const char *name)
+void audit_putname(struct filename *name)
{
struct audit_context *context = current->audit_context;