RBP: 00007fb4f9827ca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000017 R13: 00007fff404f654f R14: 00007fb4f98289c0 R15: 000000000119bf8c ------------[ cut here ]------------ percpu_ref_kill_and_confirm called more than once on io_ring_ctx_ref_free! WARNING: CPU: 0 PID: 20210 at lib/percpu-refcount.c:382 percpu_ref_kill_and_confirm+0x126/0x180 lib/percpu-refcount.c:382 Modules linked in: CPU: 0 PID: 20210 Comm: syz-executor.4 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 00 5d 9d 89 48 c7 c7 60 5c 9d 89 e8 8c f5 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:ffffc9000fd9fe18 EFLAGS: 00010082 RAX: 0000000000000000 RBX: ffff888085b19a00 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff81592ba5 RDI: fffff52001fb3fb5 RBP: ffff888011116000 R08: 0000000000000001 R09: ffff8880b9e2015b R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000246 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880311b78f8 FS: 00007fb4f9828700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000749138 CR3: 000000001189b000 CR4: 0000000000350ef0 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 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 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:00007fb4f9827c68 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 RAX: fffffffffffffff4 RBX: 0000000000000003 RCX: 000000000045e159 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000003d67 RBP: 00007fb4f9827ca0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000017 R13: 00007fff404f654f R14: 00007fb4f98289c0 R15: 000000000119bf8c