------------[ cut here ]------------ WARNING: CPU: 0 PID: 15157 at fs/io_uring.c:1499 req_ref_sub_and_test fs/io_uring.c:1499 [inline] WARNING: CPU: 0 PID: 15157 at fs/io_uring.c:1499 io_put_req_deferred fs/io_uring.c:2191 [inline] WARNING: CPU: 0 PID: 15157 at fs/io_uring.c:1499 io_link_timeout_fn+0x96c/0xb20 fs/io_uring.c:6369 Modules linked in: CPU: 0 PID: 15157 Comm: syz-executor.2 Not tainted 5.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:req_ref_sub_and_test fs/io_uring.c:1499 [inline] RIP: 0010:io_put_req_deferred fs/io_uring.c:2191 [inline] RIP: 0010:io_link_timeout_fn+0x96c/0xb20 fs/io_uring.c:6369 Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 84 f9 fd ff ff e8 ae ff da ff e9 ef fd ff ff e8 f4 03 96 ff <0f> 0b e9 6a fc ff ff e8 e8 03 96 ff 4c 89 ef e8 10 96 ff ff 48 8d RSP: 0018:ffffc90000007d70 EFLAGS: 00010046 RAX: 0000000080010000 RBX: ffff88808780edc0 RCX: 0000000000000000 RDX: ffff888079181c40 RSI: ffffffff81dece4c RDI: 0000000000000003 RBP: ffff88808780ee1c R08: 000000000000007f R09: ffff88808780ee1f R10: ffffffff81decab3 R11: 0000000000000000 R12: 000000000000007f R13: 0000000000000000 R14: ffff888079532000 R15: ffff888079532680 FS: 00007f8c91a4b700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c01c41bfc8 CR3: 000000009bd1c000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __run_hrtimer kernel/time/hrtimer.c:1537 [inline] __hrtimer_run_queues+0x609/0xe40 kernel/time/hrtimer.c:1601 hrtimer_interrupt+0x330/0xa00 kernel/time/hrtimer.c:1663 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x146/0x540 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 RIP: 0010:kasan_poison+0xa/0x60 mm/kasan/shadow.c:73 Code: 00 00 31 f6 48 89 ef e8 c4 82 f6 ff 48 c7 c7 08 ff 09 8c e8 48 da 5e 07 31 c0 5b 5d c3 0f 1f 00 48 89 f9 48 2b 0d de 9e 54 09 <48> 89 f0 48 81 f9 ff ff 1f 00 77 05 48 85 ff 75 38 40 f6 c7 07 0f RSP: 0018:ffffc90002037b50 EFLAGS: 00000287 RAX: fffffffdfc176800 RBX: ffff888037d76800 RCX: fffffffdfc176800 RDX: 0000000000000000 RSI: 0000000000000060 RDI: ffff888037d76800 RBP: 0000000000000060 R08: 0000000000000001 R09: ffffffff902249bf R10: 0000000000000001 R11: 0000000000000000 R12: ffff888011041780 R13: 0000000000000cc0 R14: 0000000000000060 R15: 0000000000000cc0 kasan_unpoison mm/kasan/shadow.c:132 [inline] kasan_unpoison+0x3c/0x60 mm/kasan/shadow.c:109 __kasan_slab_alloc+0x41/0xa0 mm/kasan/common.c:457 kasan_slab_alloc include/linux/kasan.h:236 [inline] slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:2912 [inline] slab_alloc mm/slub.c:2920 [inline] __kmalloc+0x1f7/0x330 mm/slub.c:4063 kmalloc include/linux/slab.h:561 [inline] io_alloc_async_data fs/io_uring.c:3115 [inline] io_timeout_prep+0x3d9/0x500 fs/io_uring.c:5636 io_req_prep fs/io_uring.c:5907 [inline] io_submit_sqe fs/io_uring.c:6575 [inline] io_submit_sqes+0x4e4c/0x6c50 fs/io_uring.c:6733 __do_sys_io_uring_enter+0xeaf/0x1d50 fs/io_uring.c:9318 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8c91a4b188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 000000000000450c RDI: 0000000000000003 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 0000000000a9fb1f R14: 00007f8c91a4b300 R15: 0000000000022000