Hello,
syzbot found the following issue on:
HEAD commit: c2e7554e Merge tag 'gfs2-v5.10-rc4-fixes' of git://git.ker..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=13264506500000
kernel config:
https://syzkaller.appspot.com/x/.config?x=e9a6e9171a00e85a
dashboard link:
https://syzkaller.appspot.com/bug?extid=eb0bb2eb0097bddc9fea
compiler: clang version 12.0.0 (
https://github.com/llvm/llvm-project.git 913f6005669cfb590c99865a90bc51ed0983d09d)
CC: [
john....@linaro.org linux-...@vger.kernel.org sb...@kernel.org tg...@linutronix.de]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+eb0bb2...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in ktime_get_real_seconds / timekeeping_inject_offset
read-write to 0xffffffff882f98f8 of 8 bytes by task 20327 on cpu 0:
tk_xtime_add kernel/time/timekeeping.c:144 [inline]
timekeeping_inject_offset+0x468/0x6a0 kernel/time/timekeeping.c:1369
do_adjtimex+0x569/0x660 kernel/time/timekeeping.c:2406
posix_clock_realtime_adj+0x11/0x20 kernel/time/posix-timers.c:191
do_clock_adjtime kernel/time/posix-timers.c:1109 [inline]
__do_sys_clock_adjtime kernel/time/posix-timers.c:1121 [inline]
__se_sys_clock_adjtime kernel/time/posix-timers.c:1112 [inline]
__x64_sys_clock_adjtime+0x12c/0x1b0 kernel/time/posix-timers.c:1112
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
read to 0xffffffff882f98f8 of 8 bytes by task 20326 on cpu 1:
ktime_get_real_seconds+0x11/0x20 kernel/time/timekeeping.c:1013
recently_deleted fs/ext4/ialloc.c:703 [inline]
find_inode_bit+0x231/0x3a0 fs/ext4/ialloc.c:728
__ext4_new_inode+0xd22/0x3060 fs/ext4/ialloc.c:1062
ext4_symlink+0x2bc/0x770 fs/ext4/namei.c:3336
vfs_symlink+0x216/0x2d0 fs/namei.c:3960
do_symlinkat+0xee/0x280 fs/namei.c:3987
__do_sys_symlink fs/namei.c:4006 [inline]
__se_sys_symlink fs/namei.c:4004 [inline]
__x64_sys_symlink+0x32/0x40 fs/namei.c:4004
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 20326 Comm: syz-executor.5 Not tainted 5.10.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
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