RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441629
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000003
RBP: 00007ffd815bb640 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
BUG: KASAN: use-after-free in io_queue_sqe fs/io_uring.c:2513 [inline]
BUG: KASAN: use-after-free in io_queue_link_head+0x37a/0x5c0 fs/io_uring.c:2528
Read of size 8 at addr ffff8881e8c70050 by task syz-executor579/360

CPU: 0 PID: 360 Comm: syz-executor579 Not tainted 5.4.91-syzkaller-00438-g15cec007c4a8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1dd/0x24e lib/dump_stack.c:118
 print_address_description+0x96/0x640 mm/kasan/report.c:374
 __kasan_report+0x177/0x1f0 mm/kasan/report.c:506
 kasan_report+0x30/0x60 mm/kasan/common.c:634
 io_queue_sqe fs/io_uring.c:2513 [inline]
 io_queue_link_head+0x37a/0x5c0 fs/io_uring.c:2528
 io_ring_submit fs/io_uring.c:2970 [inline]
 __do_sys_io_uring_enter fs/io_uring.c:3852 [inline]
 __se_sys_io_uring_enter+0xbd1/0x1df0 fs/io_uring.c:3813
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x441629
Code: e8 5c ae 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 3b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd815bb618 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441629
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000003
RBP: 00007ffd815bb640 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000

Allocated by task 360:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 __kasan_kmalloc+0x129/0x1c0 mm/kasan/common.c:510
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc_node mm/slub.c:2803 [inline]
 slab_alloc mm/slub.c:2811 [inline]
 kmem_cache_alloc+0x1e0/0x270 mm/slub.c:2816
 io_get_req+0x11b/0x5c0 fs/io_uring.c:644
 io_submit_sqe+0x83/0xe90 fs/io_uring.c:2578
 io_ring_submit fs/io_uring.c:2966 [inline]
 __do_sys_io_uring_enter fs/io_uring.c:3852 [inline]
 __se_sys_io_uring_enter+0x8b6/0x1df0 fs/io_uring.c:3813
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 360:
 save_stack mm/kasan/common.c:69 [inline]
 set_track mm/kasan/common.c:77 [inline]
 kasan_set_free_info mm/kasan/common.c:332 [inline]
 __kasan_slab_free+0x17e/0x230 mm/kasan/common.c:471
 slab_free_hook mm/slub.c:1453 [inline]
 slab_free_freelist_hook+0xd0/0x150 mm/slub.c:1486
 slab_free mm/slub.c:3051 [inline]
 kmem_cache_free+0xac/0x610 mm/slub.c:3067
 io_queue_sqe fs/io_uring.c:2512 [inline]
 io_queue_link_head+0x364/0x5c0 fs/io_uring.c:2528
 io_ring_submit fs/io_uring.c:2970 [inline]
 __do_sys_io_uring_enter fs/io_uring.c:3852 [inline]
 __se_sys_io_uring_enter+0xbd1/0x1df0 fs/io_uring.c:3813
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff8881e8c70000
 which belongs to the cache io_kiocb of size 264
The buggy address is located 80 bytes inside of
 264-byte region [ffff8881e8c70000, ffff8881e8c70108)
The buggy address belongs to the page:
page:ffffea0007a31c00 refcount:1 mapcount:0 mapping:ffff8881f418c280 index:0x0 compound_mapcount: 0
flags: 0x8000000000010200(slab|head)
raw: 8000000000010200 dead000000000100 dead000000000122 ffff8881f418c280
raw: 0000000000000000 0000000080150015 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881e8c6ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881e8c6ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff8881e8c70000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff8881e8c70080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881e8c70100: fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
CPU: 0 PID: 360 Comm: syz-executor579 Tainted: G    B             5.4.91-syzkaller-00438-g15cec007c4a8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1dd/0x24e lib/dump_stack.c:118
 panic+0x285/0x750 kernel/panic.c:221
 end_report mm/kasan/report.c:96 [inline]
 __kasan_report+0x1e8/0x1f0 mm/kasan/report.c:513
 kasan_report+0x30/0x60 mm/kasan/common.c:634
 io_queue_sqe fs/io_uring.c:2513 [inline]
 io_queue_link_head+0x37a/0x5c0 fs/io_uring.c:2528
 io_ring_submit fs/io_uring.c:2970 [inline]
 __do_sys_io_uring_enter fs/io_uring.c:3852 [inline]
 __se_sys_io_uring_enter+0xbd1/0x1df0 fs/io_uring.c:3813
 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x441629
Code: e8 5c ae 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 3b 0a fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd815bb618 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441629
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000003
RBP: 00007ffd815bb640 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffff
R13: 0000000000000004 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..