#0 generic_permission (inode=0xffff88001db8e498, mask=1) at ../fs/namei.c:337
#1 0xffffffff812afc1d in proc_pid_permission (inode=0xffff88001db8e498, mask=1) at ../fs/proc/base.c:721
#2 0xffffffff812441f7 in do_inode_permission (mask=<optimised out>, inode=<optimised out>) at ../fs/namei.c:382
#3 __inode_permission (inode=0xffff88001db8e498, mask=1) at ../fs/namei.c:424
#4 0xffffffff81244264 in inode_permission (inode=<optimised out>, mask=<optimised out>) at ../fs/namei.c:475
#5 0xffffffff81246370 in may_lookup (nd=<optimised out>) at ../fs/namei.c:1676
#6 link_path_walk (name=0xffff88001d1cb026 "cgroup", nd=0xffffc900000d7dc0) at ../fs/namei.c:2056
#7 0xffffffff81248147 in path_openat (nd=0xffffc900000d7dc0, op=0xffffc900000d7ef4, flags=<optimised out>) at ../fs/namei.c:3520
#8 0xffffffff8124a739 in do_filp_open (dfd=<optimised out>, pathname=<optimised out>, op=0xffffc900000d7ef4) at ../fs/namei.c:3555
#9 0xffffffff81236974 in do_sys_open (dfd=-100, filename=<optimised out>, flags=<optimised out>, mode=<optimised out>) at ../fs/open.c:1055
#10 0xffffffff81236a7e in SYSC_open (mode=<optimised out>, flags=<optimised out>, filename=<optimised out>) at ../fs/open.c:1073
#11 SyS_open (filename=<optimised out>, flags=<optimised out>, mode=<optimised out>) at ../fs/open.c:1068
#12 0xffffffff818aae7b in entry_SYSCALL_64 () at ../arch/x86/entry/entry_64.S:203
(gdb) f 5
#5 0xffffffff81246370 in may_lookup (nd=<optimised out>) at ../fs/namei.c:1676
1676 return inode_permission(nd->inode, MAY_EXEC);
(gdb) f 6
#6 link_path_walk (name=0xffff88001d1cb026 "cgroup", nd=0xffffc900000d7dc0) at ../fs/namei.c:2056
2056 err = may_lookup(nd);
(gdb) f 7
#7 0xffffffff81248147 in path_openat (nd=0xffffc900000d7dc0, op=0xffffc900000d7ef4, flags=<optimised out>) at ../fs/namei.c:3520
3520 while (!(error = link_path_walk(s, nd)) &&
(gdb) f 8
#8 0xffffffff8124a739 in do_filp_open (dfd=<optimised out>, pathname=<optimised out>, op=0xffffc900000d7ef4) at ../fs/namei.c:3555
3555 filp = path_openat(&nd, op, flags | LOOKUP_RCU);
(gdb) f 9
#9 0xffffffff81236974 in do_sys_open (dfd=-100, filename=<optimised out>, flags=<optimised out>, mode=<optimised out>) at ../fs/open.c:1055
1055 struct file *f = do_filp_open(dfd, tmp, &op);
(gdb) p/x op
$40 = {open_flag = 0x8000, mode = 0x0, acc_mode = 0x4, intent = 0x100, lookup_flags = 0x1}
(gdb) ptype op
type = struct open_flags {
int open_flag;
umode_t mode;
int acc_mode;
int intent;
int lookup_flags;
}
(gdb) ptype tmp
type = struct filename {
const char *name;
const char *uptr;
struct audit_names *aname;
int refcnt;
const char iname[];
} *
#0 generic_permission (inode=0xffff88001dbdd7a0, mask=36) at ../fs/namei.c:337
#1 0xffffffff812441ab in do_inode_permission (mask=<optimised out>, inode=<optimised out>) at ../fs/namei.c:389
#2 __inode_permission (inode=0xffff88001dbdd7a0, mask=36) at ../fs/namei.c:424
#3 0xffffffff81244264 in inode_permission (inode=<optimised out>, mask=<optimised out>) at ../fs/namei.c:475
#4 0xffffffff8124447a in may_open (path=<optimised out>, acc_mode=<optimised out>, flag=32768) at ../fs/namei.c:2934
#5 0xffffffff812482cc in do_last (opened=<optimised out>, op=<optimised out>, file=<optimised out>, nd=<optimised out>) at ../fs/namei.c:3375
#6 path_openat (nd=0xffffc900000d7dc0, op=0xffffc900000d7ef4, flags=<optimised out>) at ../fs/namei.c:3520
#7 0xffffffff8124a739 in do_filp_open (dfd=<optimised out>, pathname=<optimised out>, op=0xffffc900000d7ef4) at ../fs/namei.c:3555
#8 0xffffffff81236974 in do_sys_open (dfd=-100, filename=<optimised out>, flags=<optimised out>, mode=<optimised out>) at ../fs/open.c:1055
#9 0xffffffff81236a7e in SYSC_open (mode=<optimised out>, flags=<optimised out>, filename=<optimised out>) at ../fs/open.c:1073
#10 SyS_open (filename=<optimised out>, flags=<optimised out>, mode=<optimised out>) at ../fs/open.c:1068
#11 0xffffffff818aae7b in entry_SYSCALL_64 () at ../arch/x86/entry/entry_64.S:203
#0 generic_permission (inode=0xffff88001dae8520, mask=129) at ../fs/namei.c:337
#1 0xffffffff812441ab in do_inode_permission (mask=<optimised out>, inode=<optimised out>) at ../fs/namei.c:389
#2 __inode_permission (inode=0xffff88001dae8520, mask=129) at ../fs/namei.c:424
#3 0xffffffff81244264 in inode_permission (inode=<optimised out>, mask=<optimised out>) at ../fs/namei.c:475
#4 0xffffffff812460f5 in may_lookup (nd=<optimised out>) at ../fs/namei.c:1670
#5 link_path_walk (name=0xffff88001d1cb01d "run/systemd/notify", nd=0x81 <irq_stack_union+129>) at ../fs/namei.c:2056
#6 0xffffffff8124675c in path_lookupat (nd=0xffffc900005a3ab0, flags=0, path=0xffffc900005a3c10) at ../fs/namei.c:2301
#7 0xffffffff81249a28 in filename_lookup (dfd=<optimised out>, name=0xffff88001d1cb000, flags=0, path=0x2 <irq_stack_union+2>, root=<optimised out>) at ../fs/namei.c:2336
#8 0xffffffff81249b3b in kern_path (name=<optimised out>, flags=1, path=0xffffc900005a3c10) at ../fs/namei.c:2425
#9 0xffffffff8183c7a5 in unix_find_other (net=<optimised out>, sunname=<optimised out>, len=<optimised out>, type=2, hash=<optimised out>, error=0x746f6e2f646d6574) at ../net/unix/af_unix.c:914
#10 0xffffffff8183d479 in unix_dgram_sendmsg (sock=0xffff88001dbe2d00, msg=<optimised out>, len=10) at ../net/unix/af_unix.c:1721
#11 0xffffffff8176de18 in sock_sendmsg_nosec (msg=<optimised out>, sock=<optimised out>) at ../net/socket.c:633
#12 sock_sendmsg (sock=0xffff88001dbe2d00, msg=0xffffc900005a3ec0) at ../net/socket.c:643
#13 0xffffffff8176e8f6 in ___sys_sendmsg (sock=0xffff88001dbe2d00, msg=<optimised out>, msg_sys=0xffffc900005a3ec0, flags=<optimised out>, used_address=<optimised out>,
allowed_msghdr_flags=<optimised out>) at ../net/socket.c:1997
#14 0xffffffff8176f294 in __sys_sendmsg (fd=<optimised out>, msg=0x7ffc902d2f30, flags=16384) at ../net/socket.c:2031
#15 0xffffffff8176f2e2 in SYSC_sendmsg (flags=<optimised out>, msg=<optimised out>, fd=<optimised out>) at ../net/socket.c:2042
#16 SyS_sendmsg (fd=<optimised out>, msg=<optimised out>, flags=<optimised out>) at ../net/socket.c:2038
#17 0xffffffff818aae7b in entry_SYSCALL_64 () at ../arch/x86/entry/entry_64.S:203