------------[ cut here ]------------ percpu_ref_kill_and_confirm called more than once on io_ring_ctx_ref_free! WARNING: CPU: 0 PID: 23452 at lib/percpu-refcount.c:382 percpu_ref_kill_and_confirm+0x126/0x180 lib/percpu-refcount.c:382 Modules linked in: CPU: 0 PID: 23452 Comm: syz-executor.2 Not tainted 5.10.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:percpu_ref_kill_and_confirm+0x126/0x180 lib/percpu-refcount.c:382 Code: 5d 08 48 8d 7b 08 48 89 fa 48 c1 ea 03 80 3c 02 00 75 5d 48 8b 53 08 48 c7 c6 00 f1 9c 89 48 c7 c7 60 f0 9c 89 e8 16 9d f6 04 <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 80 3c 02 RSP: 0018:ffffc900096c7be8 EFLAGS: 00010082 RAX: 0000000000000000 RBX: ffff888029918200 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff8158c855 RDI: fffff520012d8f6f RBP: ffff888029695000 R08: 0000000000000001 R09: ffff8880b9e2011b R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000212 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888037dada48 FS: 00007f509c819700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2eb29000 CR3: 0000000071df3000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: percpu_ref_kill include/linux/percpu-refcount.h:149 [inline] io_ring_ctx_wait_and_kill+0x2b/0x450 fs/io_uring.c:8382 io_uring_release+0x3e/0x50 fs/io_uring.c:8420 __fput+0x285/0x920 fs/file_table.c:281 task_work_run+0xdd/0x190 kernel/task_work.c:151 get_signal+0xd8f/0x1f10 kernel/signal.c:2562 arch_do_signal+0x82/0x2390 arch/x86/kernel/signal.c:811 exit_to_user_mode_loop kernel/entry/common.c:161 [inline] exit_to_user_mode_prepare+0x100/0x1a0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x38/0x260 kernel/entry/common.c:266 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e159 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f509c818be8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9 RAX: fffffffffffffff4 RBX: 0000000020000080 RCX: 000000000045e159 RDX: 00000000206d4000 RSI: 0000000020000080 RDI: 0000000000000086 RBP: 000000000119c128 R08: 0000000020000040 R09: 0000000020000040 R10: 0000000020000000 R11: 0000000000000206 R12: 00000000206d4000 R13: 0000000020ee7000 R14: 0000000020000040 R15: 0000000020000000