WARNING in io_try_cancel

Title	Replies (including bot)	Last reply
[PATCH 5.15 000/179] 5.15.6-rc1 review	189 (189)	2021/12/01 02:29
[PATCH 0/2] 5.16 fixes for syz reports	6 (6)	2021/11/26 15:36
[syzbot] WARNING in io_try_cancel_userdata (2)	0 (1)	2021/11/26 02:27

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in io_try_cancel_userdata fs io-uring	syz	unreliable		4	973d	977d	20/26	fixed on 2021/11/10 00:50

upstream

WARNING in io_try_cancel_userdata fs io-uring

syz

unreliable

973d

977d

20/26

fixed on 2021/11/10 00:50

------------[ cut here ]------------ WARNING: CPU: 1 PID: 20 at fs/io_uring.c:6269 io_try_cancel_userdata+0x3c5/0x640 fs/io_uring.c:6269 Modules linked in: CPU: 1 PID: 20 Comm: kworker/1:0 Not tainted 5.16.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events io_fallback_req_func RIP: 0010:io_try_cancel_userdata+0x3c5/0x640 fs/io_uring.c:6269 Code: 44 89 f0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 92 db 95 ff 65 48 8b 04 25 40 70 02 00 49 39 c6 0f 84 a0 fd ff ff e8 7b db 95 ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 4c 89 fa 48 c1 ea 03 80 3c 02 RSP: 0018:ffffc90000da7bc8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88803a80d3c0 RCX: 0000000000000000 RDX: ffff888011a38000 RSI: ffffffff81e1bde5 RDI: 0000000000000003 RBP: 1ffff920001b4f7a R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff81e1bb37 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88807eaf7000 R14: ffff88803b203a00 R15: ffff88803a80d420 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2d3db37718 CR3: 000000001c339000 CR4: 0000000000350ee0 Call Trace: <TASK> io_req_task_link_timeout+0x6b/0x1e0 fs/io_uring.c:6886 io_fallback_req_func+0xf9/0x1ae fs/io_uring.c:1334 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 worker_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 </TASK>