------------[ cut here ]------------ kernel BUG at fs/io_uring.c:1293! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 22931 Comm: kworker/0:5 Tainted: G W 5.14.0-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_queue_async_work+0x539/0x5f0 fs/io_uring.c:1293 Code: 89 be 89 00 00 00 48 c7 c7 40 53 9a 89 c6 05 de 38 78 0b 01 e8 72 6b 08 07 e9 6e ff ff ff e8 ee 68 95 ff 0f 0b e8 e7 68 95 ff <0f> 0b e8 e0 68 95 ff 0f 0b e9 1a fd ff ff e8 34 0f db ff e9 47 fb RSP: 0018:ffffc9000438fba8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88802d73fc00 RCX: 0000000000000000 RDX: ffff8880865a0080 RSI: ffffffff81df55c9 RDI: ffff88803da20990 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000019 R10: ffffffff81df517c R11: 000000000000000f R12: ffff88807f3c7680 R13: 0000000000000019 R14: ffff88802d73fcb0 R15: ffff88807f3c76d8 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4da2 CR3: 0000000080282000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __io_queue_sqe+0x913/0xf10 fs/io_uring.c:6448 io_req_task_submit+0x100/0x120 fs/io_uring.c:2020 io_fallback_req_func+0x81/0xb0 fs/io_uring.c:2441 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 76f7259c70259c42 ]--- RIP: 0010:io_queue_async_work+0x539/0x5f0 fs/io_uring.c:1293 Code: 89 be 89 00 00 00 48 c7 c7 40 53 9a 89 c6 05 de 38 78 0b 01 e8 72 6b 08 07 e9 6e ff ff ff e8 ee 68 95 ff 0f 0b e8 e7 68 95 ff <0f> 0b e8 e0 68 95 ff 0f 0b e9 1a fd ff ff e8 34 0f db ff e9 47 fb RSP: 0018:ffffc9000438fba8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff88802d73fc00 RCX: 0000000000000000 RDX: ffff8880865a0080 RSI: ffffffff81df55c9 RDI: ffff88803da20990 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000019 R10: ffffffff81df517c R11: 000000000000000f R12: ffff88807f3c7680 R13: 0000000000000019 R14: ffff88802d73fcb0 R15: ffff88807f3c76d8 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc603a94000 CR3: 000000006aab6000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400