On 9/8/21 10:45 AM, Thomas Gleixner wrote: > On Mon, Sep 06 2021 at 03:28, syzbot wrote: >> syzbot found the following issue on: >> >> HEAD commit: 835d31d319d9 Merge tag 'media/v5.15-1' of git://git.kernel.. >> git tree: upstream >> console output: https://syzkaller.appspot.com/x/log.txt?x=14489886300000 >> kernel config: https://syzkaller.appspot.com/x/.config?x=d793523866f2daea >> dashboard link: https://syzkaller.appspot.com/bug?extid=b935db3fe409625cca1b >> compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.1 >> >> 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+b935db3fe409625cca1b@xxxxxxxxxxxxxxxxxxxxxxxxx >> >> general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN >> KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] >> CPU: 0 PID: 12936 Comm: iou-sqp-12929 Not tainted 5.14.0-syzkaller #0 >> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 >> RIP: 0010:lock_hrtimer_base kernel/time/hrtimer.c:173 [inline] > > That's almost certainly deferencing hrtimer->base and as that is NULL > this looks like a not initialized hrtimer. Does certainly look like that, I'll take a look. And agree the next one looks like the same thing. -- Jens Axboe
