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Commits on Feb 9, 2019
  1. dashboard/config: enable WITNESS_LOCKTRACE on OpenBSD (#987)

    mptre authored and blackgnezdo committed Feb 9, 2019
    This option will print all lock acquisition paths once a lock violation
    is identified by witness[1].
    
    [1] https://marc.info/?l=openbsd-cvs&m=154955230813384&w=2
Commits on Feb 8, 2019
  1. sys/linux: prohibit opening /proc/self/exe

    dvyukov committed Feb 8, 2019
    Fuzzer manages to open it and do bad things with it.
    Prevent it from doing so.
  2. pkg/ipc: generate better temp name for executor

    dvyukov committed Feb 8, 2019
    Just appending the pid number can produce conflicting names
    if the name itself ends with digits (standard temp file naming convention).
    So append ".PID".
    Also remove beginning from too long names instead of ending.
    Temp files in tests has unique numbers at the end, we need to preserve them
    to avoid file name conflicts.
  3. pkg/runtest: run syz tests in non-repeat mode

    dvyukov committed Feb 8, 2019
    Turns out it can affect some tests,
    e.g. some things manifest only after executor restart
    (executor binary marked as non-executable by the test).
  4. sys/linux: prohibit EXT4_IOC_RESIZE_FS

    dvyukov committed Feb 7, 2019
    When we run with sandbox=none, test program can do EXT4_IOC_RESIZE_FS which
    shrinks rootfs basically to 0. This breaks the machine as all tests then fail with:
    
    failed to create temp dir: mkdir syzkaller-testdir077269498: no space left on device
    
    This is the most common source of "lost connection" crashes overall and
    they are not actually kernel bugs.
    
    Prohibit EXT4_IOC_RESIZE_FS for now.
    Alternatively we can mount tmpfs with sandbox=none.
    
    Update #971
Commits on Feb 7, 2019
  1. sys/linux: extend key descriptions

    dvyukov committed Jan 30, 2019
Commits on Feb 6, 2019
  1. sys/fuchsia: fix fidlgen issues

    mvanotti authored and dvyukov committed Feb 6, 2019
    * sys/fuchsia: fix fidlgen issues.
    
    This change modifies fidlgen removing fuchsia.mediacodec and renaming
    zircon-ethernet to fuchsia-hardware-ethernet.
    
    fuchsia.mediacodec has most of its functionality merged into
    fuchsia.media and it's not included in the default amd64 builds.
    
    zircon-ethernet has been renamed to fuchsia-hardware-ethernet
    recently:
    
    https://fuchsia-review.googlesource.com/c/zircon/+/237178
    
    * docs/fuchsia: Add troubleshooting sections
    
    This commit adds a troubleshooting section in the fuchsia syzkaller docs
    that mentions how to solve fidlgen issues when fidl interfaces are
    removed or renamed.
    
    * sys/fuchsia: remove stale autogenerated files.
    
    * sys/fucsia run make extract && make generate.
Commits on Feb 4, 2019
  1. Create CODE_OF_CONDUCT.md

    dvyukov committed Feb 4, 2019
Commits on Feb 2, 2019
  1. sys/openbsd: add missing wscons descriptions (#976)

    mptre authored and blackgnezdo committed Feb 2, 2019
Commits on Feb 1, 2019
  1. pkg/report: add simple version of netbsd crash parser

    dvyukov committed Feb 1, 2019
    Just something to start with. Plus some test cases.
  2. executor: add missing include

    dvyukov committed Feb 1, 2019
    thread_start now uses errno, so include <errno.h>
  3. docs: move netbsd.md into own dir

    dvyukov committed Feb 1, 2019
    The latest trend is to create a dir per OS as we now have too many of them.
    Create a dir netbsd and move the existing doc into it.
  4. dashboard/config: add lsm= cmdline arg for stacked modules

    dvyukov committed Feb 1, 2019
    It won't take effect right now as security= has precedence over lsm=.
    But it won't harm too and later we will only need to remove security=.
    Also it will work with this custom patch for syzbot:
    https://groups.google.com/d/msg/syzkaller/BSgVCTSShRQ/E6lFuiDpFwAJ
    
    Update #973
  5. docs/openbsd: update found_bugs.md

    mptre authored and dvyukov committed Feb 1, 2019
  6. Update found_bugs.md

    dvyukov committed Feb 1, 2019
  7. prog: fix checksum dependencies

    xairy committed Feb 1, 2019
    Make pseudo checksums depend (via csumUses) on the arg it requires for
    calculation. Otherwise we fail to assign addrs to those args during encoding
    for execution. Also add a test.
  8. sys/linux: rename dev descriptions files

    xairy committed Feb 1, 2019
    Prefix file names of descriptions of /dev/* files with dev_.
    And give some of them more appropriate names.
  9. dashboard/config: prepare for stacked security modules

    dvyukov committed Feb 1, 2019
    In linux-next security modules can be stacked.
    TOMOYO is compatible with other modules and SAFESETID
    module is added. But this is not yet in mainline.
    
    Enable TOMOYO and SAFESETID.
    There is no way to enable stacked modules in linux-next
    while preserving the current behavior in mainline.
    Once these changes reach mainline, we will need to replace
    security cmdline arguments with lsm as follows:
    
    lsm=yama,safesetid,integrity,selinux,tomoyo
    lsm=yama,safesetid,integrity,smack,tomoyo
    lsm=yama,safesetid,integrity,tomoyo,apparmor
  10. syz-manager: restore disabled syscall logging

    dvyukov committed Feb 1, 2019
    We reset disabled syscalls before checking them.
    As the result no diagnostics printed. Reset them after checking.
  11. docs/trusty: add instructions on running syzkaller

    dvyukov committed Feb 1, 2019
    Update #933
Commits on Jan 31, 2019
  1. executor, pkg/ipc: simplify retry handling

    dvyukov committed Jan 31, 2019
    Remove kRetryStatus, it's effectively the same as exiting with 0.
    Remove ipc.ExecutorFailure, nobody uses it.
    Simplify few other minor things around exit status handling.
  2. executor: remove ability to detect kernel bugs

    dvyukov committed Jan 31, 2019
    This ability was never used but we maintain a bunch of code for it.
    syzkaller also recently learned to spoof this error code
    with some ptrace magic (probably intercepted control flow again
    and exploited executor binary).
    Drop all of it.
  3. executor: fix do_sandbox_none on akaros and test

    dvyukov committed Jan 31, 2019
    do_sandbox_none must not exit, it needs to return.
  4. executor: handle pthread_create errors better

    dvyukov committed Jan 31, 2019
    See the added comment for explanation.
  5. pkg/csource: write tracing output to stderr

    dvyukov committed Jan 31, 2019
    stdout is not flushed on abnormal exit.
  6. pkg/compiler: don't warn about the same len twice

    dvyukov committed Jan 29, 2019
    Also add tests for warnings while we are here.
  7. prog: fix escaping of C strings

    dvyukov committed Jan 28, 2019
    C's \xHH hex constants in strings accept any number of hex digits
    (not just 2 or 4). So later non-hex escaped chars glue to the \x construct.
    Use \OOO instead as it accepts at most 3 octal digits.
Commits on Jan 28, 2019
  1. sys: use -march=armv6 instead of -march=armv6t2

    xairy authored and dvyukov committed Jan 28, 2019
    The latter doesn't work on Raspberry Pi Zero.
  2. executor: fix remote coverage area size

    xairy authored and dvyukov committed Jan 28, 2019
    It should be in number of words not in bytes.
  3. pkg/report: improved witness handling

    mptre authored and dvyukov committed Jan 27, 2019
    Possible now since the output is consistently prefixed[1].
    
    [1] https://marc.info/?l=openbsd-cvs&m=154850328128727&w=2
  4. docs/openbsd: update found_bugs.md

    mptre authored and dvyukov committed Jan 28, 2019
Commits on Jan 26, 2019
  1. sys/openbsd: add wscons descriptions, limited to wsdisplay for now

    mptre authored and dvyukov committed Jan 9, 2019
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