Hello, syzbot found the following issue on: HEAD commit: fa02fcd9 Merge tag 'media/v5.10-2' of git://git.kernel.org.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14a36fa5500000 kernel config: https://syzkaller.appspot.com/x/.config?x=7be70951fca93701 dashboard link: https://syzkaller.appspot.com/bug?extid=e7edf1d784c283324076 compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project.git ca2dcbd030eadbf0aa9b660efe864ff08af6e18b) 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+e7edf1d784c283324076@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc000000005a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000002d0-0x00000000000002d7] CPU: 1 PID: 16756 Comm: kworker/1:8 Not tainted 5.10.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events l2cap_chan_timeout RIP: 0010:__mutex_lock_common+0x9b/0x2f20 kernel/locking/mutex.c:938 Code: 8a bc 24 28 01 00 00 83 3d 01 69 0f 06 00 75 34 48 8b 44 24 08 48 8d 78 60 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 ba 7f 77 f8 48 8b 44 24 08 48 39 40 60 0f 85 RSP: 0018:ffffc9000245fb78 EFLAGS: 00010206 RAX: 000000000000005a RBX: ffff8880708d8110 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000002d0 RBP: 0000000000000000 R08: ffffffff8876a063 R09: 0000000000000000 R10: fffffbfff1a1c3ee R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b9d33c00 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffde459fd3c CR3: 00000000186a5000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mutex_lock kernel/locking/mutex.c:1103 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:1118 l2cap_chan_timeout+0x53/0x280 net/bluetooth/l2cap_core.c:422 process_one_work+0x789/0xfc0 kernel/workqueue.c:2272 worker_thread+0xaa4/0x1460 kernel/workqueue.c:2418 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Modules linked in: ---[ end trace c01f537d4b85904a ]--- RIP: 0010:__mutex_lock_common+0x9b/0x2f20 kernel/locking/mutex.c:938 Code: 8a bc 24 28 01 00 00 83 3d 01 69 0f 06 00 75 34 48 8b 44 24 08 48 8d 78 60 48 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 05 e8 ba 7f 77 f8 48 8b 44 24 08 48 39 40 60 0f 85 RSP: 0018:ffffc9000245fb78 EFLAGS: 00010206 RAX: 000000000000005a RBX: ffff8880708d8110 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000002d0 RBP: 0000000000000000 R08: ffffffff8876a063 R09: 0000000000000000 R10: fffffbfff1a1c3ee R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880b9d33c00 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbbcfa32740 CR3: 000000006d47f000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
