On 7/12/21 10:28 AM, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: e2f74b13 Add linux-next specific files for 20210708 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=14fc6fb4300000 > kernel config: https://syzkaller.appspot.com/x/.config?x=59e1e3bbc3afca75 > dashboard link: https://syzkaller.appspot.com/bug?extid=d50e4f20cfad4510ec22 > > 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+d50e4f20cfad4510ec22@xxxxxxxxxxxxxxxxxxxxxxxxx [...] > __io_queue_sqe+0x913/0xf10 fs/io_uring.c:6444 Shouldn't have got here from fallback, so very similar to a bug fixed by an already sent "io_uring: use right task for exiting checks" > io_req_task_submit+0x100/0x120 fs/io_uring.c:2020 > io_fallback_req_func+0x81/0xb0 fs/io_uring.c:2437 > process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 > worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 > kthread+0x3e5/0x4d0 kernel/kthread.c:319 > ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 > Modules linked in: > ---[ end trace 4d51acadba583174 ]--- > RIP: 0010:io_queue_async_work+0x539/0x5f0 fs/io_uring.c:1293 > Code: 89 be 89 00 00 00 48 c7 c7 00 8a 9a 89 c6 05 28 5f 77 0b 01 e8 be e9 06 07 e9 6e ff ff ff e8 be 1e 95 ff 0f 0b e8 b7 1e 95 ff <0f> 0b e8 b0 1e 95 ff 0f 0b e9 1a fd ff ff e8 d4 2f db ff e9 47 fb > RSP: 0018:ffffc900032efba8 EFLAGS: 00010293 > RAX: 0000000000000000 RBX: ffff88802840c800 RCX: 0000000000000000 > RDX: ffff888082e09c80 RSI: ffffffff81e07d49 RDI: ffff8880224da498 > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000043736500 > R10: ffffffff81e222ff R11: 0000000000000000 R12: ffff8880782e78c0 > R13: 0000000000000019 R14: ffff88802840c8b0 R15: ffff8880782e7918 > FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f3dee45e000 CR3: 000000002dd4e000 CR4: 00000000001506f0 > 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. > -- Pavel Begunkov
