==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x77/0x1f80 kernel/locking/lockdep.c:4919
Read of size 8 at addr ffff88805430e358 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.88-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15f/0x4f0 mm/kasan/report.c:395
kasan_report+0x136/0x160 mm/kasan/report.c:495
__lock_acquire+0x77/0x1f80 kernel/locking/lockdep.c:4919
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
try_to_wake_up+0xad/0x12e0 kernel/sched/core.c:4112
call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
expire_timers kernel/time/timer.c:1549 [inline]
__run_timers+0x67c/0x890 kernel/time/timer.c:1820
run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x155/0x240 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:113 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:572
Code: b1 f5 f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 e4 6f fc f6 0f 1f 44 00 00 e8 8a ad f5 f6 0f 00 2d 83 7b b2 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 2b 25 4d f7
RSP: 0018:ffffc90000177b80 EFLAGS: 000002d3
RAX: ffffffff8a94e1d6 RBX: 0000000000000000 RCX: ffff888012731dc0
RDX: 0000000000000000 RSI: ffffffff8aec01c0 RDI: ffffffff8b3d42e0
RBP: ffffc90000177c10 R08: ffffffff8a94e1b8 R09: ffffed10024e63b9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200002ef70
R13: ffff888015f21804 R14: ffffc90000177ba0 R15: dffffc0000000000
acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:709
cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3ce/0x680 kernel/sched/idle.c:303
cpu_startup_entry+0x3d/0x60 kernel/sched/idle.c:401
start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:281
secondary_startup_64_no_verify+0xcf/0xdb
Allocated by task 2:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x65/0x70 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook+0x52/0x3a0 mm/slab.h:737
slab_alloc_node mm/slub.c:3398 [inline]
kmem_cache_alloc_node+0x136/0x310 mm/slub.c:3443
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x57/0x6d0 kernel/fork.c:980
copy_process+0x637/0x4060 kernel/fork.c:2098
kernel_clone+0x222/0x920 kernel/fork.c:2682
kernel_thread+0x152/0x1d0 kernel/fork.c:2742
create_kthread kernel/kthread.c:399 [inline]
kthreadd+0x596/0x760 kernel/kthread.c:746
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Freed by task 0:
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0x292/0x510 mm/slub.c:3683
rcu_do_batch kernel/rcu/tree.c:2296 [inline]
rcu_core+0xad5/0x1810 kernel/rcu/tree.c:2556
__do_softirq+0x2e9/0xa4c kernel/softirq.c:571
Last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486
call_rcu+0x163/0xa10 kernel/rcu/tree.c:2844
context_switch kernel/sched/core.c:5248 [inline]
__schedule+0x1435/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
do_nanosleep+0x192/0x5f0 kernel/time/hrtimer.c:2045
hrtimer_nanosleep+0x24d/0x490 kernel/time/hrtimer.c:2098
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1308 [inline]
__se_sys_clock_nanosleep+0x323/0x3b0 kernel/time/posix-timers.c:1285
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Second to last potentially related work creation:
kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
__kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:486
call_rcu+0x163/0xa10 kernel/rcu/tree.c:2844
context_switch kernel/sched/core.c:5248 [inline]
__schedule+0x1435/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
worker_thread+0xe9d/0x1200 kernel/workqueue.c:2460
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to the object at ffff88805430d940
which belongs to the cache task_struct of size 7360
The buggy address is located 2584 bytes inside of
7360-byte region [ffff88805430d940, ffff88805430f600)
The buggy address belongs to the physical page:
page:ffffea000150c200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x54308
head:ffffea000150c200 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff88805a852781
flags: 0xfff80000010200(slab|head|node=0|zone=1|lastcpupid=0xfff)
raw: 00fff80000010200 0000000000000000 dead000000000001 ffff888140008500
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff88805a852781
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 3930, tgid 3930 (syz-executor.1), ts 71120575976, free_ts 71085828814
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513
prep_new_page mm/page_alloc.c:2520 [inline]
get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5547
alloc_slab_page+0x6a/0x150 mm/slub.c:1794
allocate_slab mm/slub.c:1939 [inline]
new_slab+0x84/0x2d0 mm/slub.c:1992
___slab_alloc+0xc20/0x1270 mm/slub.c:3180
__slab_alloc mm/slub.c:3279 [inline]
slab_alloc_node mm/slub.c:3364 [inline]
kmem_cache_alloc_node+0x1cf/0x310 mm/slub.c:3443
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct+0x57/0x6d0 kernel/fork.c:980
copy_process+0x637/0x4060 kernel/fork.c:2098
kernel_clone+0x222/0x920 kernel/fork.c:2682
__do_sys_clone3 kernel/fork.c:2981 [inline]
__se_sys_clone3+0x373/0x410 kernel/fork.c:2965
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1440 [inline]
__free_pages_ok+0xcee/0xe20 mm/page_alloc.c:1696
io_ring_ctx_free+0x757/0x99f io_uring/io_uring.c:2643
io_ring_exit_work+0x72a/0x794 io_uring/io_uring.c:2818
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Memory state around the buggy address:
ffff88805430e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805430e280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88805430e300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805430e380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805430e400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: b1 f5 mov $0xf5,%cl
2: f6 48 83 e3 testb $0xe3,-0x7d(%rax)
6: 08 0f or %cl,(%rdi)
8: 85 0b test %ecx,(%rbx)
a: 01 00 add %eax,(%rax)
c: 00 4c 8d 74 add %cl,0x74(%rbp,%rcx,4)
10: 24 20 and $0x20,%al
12: e8 e4 6f fc f6 call 0xf6fc6ffb
17: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1c: e8 8a ad f5 f6 call 0xf6f5adab
21: 0f 00 2d 83 7b b2 00 verw 0xb27b83(%rip) # 0xb27bab
28: fb sti
29: f4 hlt
* 2a: 4c 89 f3 mov %r14,%rbx <-- trapping instruction
2d: 48 c1 eb 03 shr $0x3,%rbx
31: 42 80 3c 3b 00 cmpb $0x0,(%rbx,%r15,1)
36: 74 08 je 0x40
38: 4c 89 f7 mov %r14,%rdi
3b: e8 2b 25 4d f7 call 0xf74d256b