------------[ cut here ]------------ percpu_ref_kill_and_confirm called more than once on io_ring_ctx_ref_free! WARNING: CPU: 1 PID: 30256 at lib/percpu-refcount.c:382 percpu_ref_kill_and_confirm+0x126/0x180 lib/percpu-refcount.c:382 Modules linked in: CPU: 1 PID: 30256 Comm: syz-executor.2 Not tainted 5.10.0-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 a0 90 9d 89 48 c7 c7 00 90 9d 89 e8 e3 af fa 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:ffffc900174d7be8 EFLAGS: 00010082 RAX: 0000000000000000 RBX: ffff88801adaa500 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff81594d05 RDI: fffff52002e9af6f RBP: ffff888026fe6000 R08: 0000000000000001 R09: ffff8880b9f2015b R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000212 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88805177f780 FS: 00007f725a167700(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000074c698 CR3: 0000000034f4e000 CR4: 0000000000350ee0 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:168 get_signal+0xd90/0x1fb0 kernel/signal.c:2596 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x124/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 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:00007f725a166c68 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 RAX: fffffffffffffff4 RBX: 0000000000000002 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 000000000000107b RBP: 000000000119c060 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034 R13: 00007ffcdf7f888f R14: 00007f725a1679c0 R15: 000000000119c034