R10: 0000000020000080 R11: 0000000000000202 R12: 00000000200000c0
R13: 0000000020ffd000 R14: 0000000020000080 R15: 0000000020ffc000
==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x334f/0x4360
Read of size 8 at addr ffff88803ce6c100 by task syz-executor.0/11624
CPU: 1 UID: 0 PID: 11624 Comm: syz-executor.0 Not tainted 6.13.0-rc1-next-20241206 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xca/0x120
print_report+0xcb/0x620
kasan_report+0xbd/0xf0
__lock_acquire+0x334f/0x4360
lock_acquire.part.0+0xeb/0x320
_raw_spin_lock_irqsave+0x3a/0x60
try_to_wake_up+0x9f/0x1880
io_sq_thread_park+0xac/0xe0
io_sq_thread_finish+0x64/0x290
io_sq_offload_create+0x162/0x1110
io_uring_setup+0x17da/0x32f0
__x64_sys_io_uring_setup+0x99/0x160
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f334795bb19
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:00007f3344ed1108 EFLAGS: 00000202 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 00007f3347a6ef60 RCX: 00007f334795bb19
RDX: 0000000020ffd000 RSI: 0000000020000000 RDI: 00000000000060e0
RBP: 0000000020000000 R08: 00000000200000c0 R09: 00000000200000c0
R10: 0000000020000080 R11: 0000000000000202 R12: 00000000200000c0
R13: 0000000020ffd000 R14: 0000000020000080 R15: 0000000020ffc000
Allocated by task 11624:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
__kasan_slab_alloc+0x59/0x70
kmem_cache_alloc_node_noprof+0x14c/0x3e0
copy_process+0x440/0x70e0
create_io_thread+0xac/0xf0
io_sq_offload_create+0xaf7/0x1110
io_uring_setup+0x17da/0x32f0
__x64_sys_io_uring_setup+0x99/0x160
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack+0x24/0x50
kasan_save_track+0x14/0x30
kasan_save_free_info+0x3a/0x60
__kasan_slab_free+0x38/0x50
kmem_cache_free+0x138/0x470
delayed_put_task_struct+0x108/0x2b0
rcu_core+0x7c9/0x17a0
handle_softirqs+0x1b1/0x770
run_ksoftirqd+0x2e/0x60
smpboot_thread_fn+0x3eb/0x930
kthread+0x2c2/0x3a0
ret_from_fork+0x48/0x80
ret_from_fork_asm+0x1a/0x30
Last potentially related work creation:
kasan_save_stack+0x24/0x50
kasan_record_aux_stack+0x89/0xa0
__call_rcu_common.constprop.0+0x6a/0xaa0
put_task_struct_rcu_user+0x75/0xc0
__schedule+0xc53/0x3030
schedule+0xdb/0x340
worker_thread+0x14c/0xe70
kthread+0x2c2/0x3a0
ret_from_fork+0x48/0x80
ret_from_fork_asm+0x1a/0x30
The buggy address belongs to the object at ffff88803ce6b780
which belongs to the cache task_struct of size 6848
The buggy address is located 2432 bytes inside of
freed 6848-byte region [ffff88803ce6b780, ffff88803ce6d240)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3ce68
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88800e336a81
anon flags: 0x100000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0100000000000040 ffff888008ff0640 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff88800e336a81
head: 0100000000000040 ffff888008ff0640 0000000000000000 dead000000000001
head: 0000000000000000 0000000000040004 00000000f5000000 ffff88800e336a81
head: 0100000000000003 ffffea0000f39a01 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88803ce6c000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88803ce6c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88803ce6c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88803ce6c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88803ce6c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
loop7: detected capacity change from 0 to 2888
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 UID: 0 PID: 11645 Comm: syz-executor.5 Tainted: G B 6.13.0-rc1-next-20241206 #1
Tainted: [B]=BAD_PAGE
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0xfa/0x120
should_fail_ex+0x4b1/0x5b0
should_failslab+0xc2/0x120
kmem_cache_alloc_lru_noprof+0x74/0x3c0
__d_alloc+0x31/0x990
d_alloc_pseudo+0x1d/0xc0
alloc_file_pseudo+0xcc/0x200
__shmem_file_setup+0x214/0x310
__do_sys_memfd_create+0x4d7/0x980
do_syscall_64+0xbf/0x1d0
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf297b9b19
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:00007fcf26d2ef48 EFLAGS: 00000246 ORIG_RAX: 000000000000013f
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007fcf297b9b19
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fcf298130fb
RBP: 0000000000000003 R08: 0000000000000000 R09: ffffffffffffffff
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000008100000
R13: 0000000020000100 R14: 00000000000003c0 R15: 0000000020010f00