==================================================================
BUG: KASAN: use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock+0x261/0x2a0 kernel/locking/spinlock_debug.c:114
Read of size 4 at addr ffff888025a026b4 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15e/0x45d mm/kasan/report.c:395
kasan_report+0xbb/0x1f0 mm/kasan/report.c:495
debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline]
do_raw_spin_lock+0x261/0x2a0 kernel/locking/spinlock_debug.c:114
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
_raw_spin_lock_irqsave+0x41/0x50 kernel/locking/spinlock.c:162
try_to_wake_up+0xb2/0x20f0 kernel/sched/core.c:4076
call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1474
expire_timers kernel/time/timer.c:1519 [inline]
__run_timers.part.0+0x6a2/0xaf0 kernel/time/timer.c:1790
__run_timers kernel/time/timer.c:1768 [inline]
run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803
__do_softirq+0x1f7/0xad8 kernel/softirq.c:571
invoke_softirq kernel/softirq.c:445 [inline]
__irq_exit_rcu+0x123/0x180 kernel/softirq.c:650
irq_exit_rcu+0x5/0x20 kernel/softirq.c:662
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [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+0x1fd/0x2a0 drivers/acpi/processor_idle.c:572
Code: 89 de e8 06 f9 ea f7 84 db 75 ac e8 6d fc ea f7 e8 28 73 f1 f7 eb 0c e8 61 fc ea f7 0f 00 2d da fd c2 00 e8 55 fc ea f7 fb f4 <9c> 5b 81 e3 00 02 00 00 fa 31 ff 48 89 de e8 30 f9 ea f7 48 85 db
RSP: 0018:ffffc90000177d10 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888011a81d40 RSI: ffffffff8991a02b RDI: ffffffff8991a018
RBP: ffff8881458a3864 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: ffff8881458a3800 R14: ffff8881458a3864 R15: ffff88801ba71004
acpi_idle_enter+0x364/0x500 drivers/acpi/processor_idle.c:709
cpuidle_enter_state+0x1ab/0xd30 drivers/cpuidle/cpuidle.c:239
cpuidle_enter+0x4a/0xa0 drivers/cpuidle/cpuidle.c:356
call_cpuidle kernel/sched/idle.c:155 [inline]
cpuidle_idle_call kernel/sched/idle.c:236 [inline]
do_idle+0x3f7/0x590 kernel/sched/idle.c:303
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:400
start_secondary+0x252/0x300 arch/x86/kernel/smpboot.c:262
secondary_startup_64_no_verify+0xce/0xdb
Allocated by task 2:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
kasan_set_track+0x21/0x30 mm/kasan/common.c:52
__kasan_slab_alloc+0x7e/0x80 mm/kasan/common.c:325
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slab.h:737 [inline]
slab_alloc_node mm/slub.c:3398 [inline]
kmem_cache_alloc_node+0x2fc/0x400 mm/slub.c:3443
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct kernel/fork.c:966 [inline]
copy_process+0x5c2/0x7190 kernel/fork.c:2084
kernel_clone+0xe7/0x980 kernel/fork.c:2671
kernel_thread+0xb5/0xf0 kernel/fork.c:2731
create_kthread kernel/kthread.c:399 [inline]
kthreadd+0x4ea/0x750 kernel/kthread.c:746
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Freed by task 15:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
kasan_set_track+0x21/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2a/0x40 mm/kasan/generic.c:511
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1750
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0xea/0x5b0 mm/slub.c:3683
put_task_struct include/linux/sched/task.h:119 [inline]
delayed_put_task_struct+0x26a/0x3d0 kernel/exit.c:178
rcu_do_batch kernel/rcu/tree.c:2250 [inline]
rcu_core+0x81f/0x1980 kernel/rcu/tree.c:2510
__do_softirq+0x1f7/0xad8 kernel/softirq.c:571
Last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481
call_rcu+0x99/0x820 kernel/rcu/tree.c:2798
put_task_struct_rcu_user+0x7f/0xc0 kernel/exit.c:184
context_switch kernel/sched/core.c:5194 [inline]
__schedule+0xaf1/0x53f0 kernel/sched/core.c:6503
schedule+0xda/0x1b0 kernel/sched/core.c:6579
schedule_hrtimeout_range_clock+0x195/0x390 kernel/time/hrtimer.c:2305
ep_poll fs/eventpoll.c:1878 [inline]
do_epoll_wait+0x12ba/0x1950 fs/eventpoll.c:2256
__do_sys_epoll_wait fs/eventpoll.c:2268 [inline]
__se_sys_epoll_wait fs/eventpoll.c:2263 [inline]
__x64_sys_epoll_wait+0x158/0x270 fs/eventpoll.c:2263
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Second to last potentially related work creation:
kasan_save_stack+0x1e/0x40 mm/kasan/common.c:45
__kasan_record_aux_stack+0xbc/0xd0 mm/kasan/generic.c:481
call_rcu+0x99/0x820 kernel/rcu/tree.c:2798
put_task_struct_rcu_user+0x7f/0xc0 kernel/exit.c:184
context_switch kernel/sched/core.c:5194 [inline]
__schedule+0xaf1/0x53f0 kernel/sched/core.c:6503
preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6672
preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34
vprintk_emit+0x1ea/0x5f0 kernel/printk/printk.c:2269
vprintk+0x80/0x90 kernel/printk/printk_safe.c:50
_printk+0xba/0xed kernel/printk/printk.c:2289
__nilfs_msg+0x1f7/0x25c fs/nilfs2/super.c:78
nilfs_segctor_thread+0x216/0xf30 fs/nilfs2/segment.c:2550
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
The buggy address belongs to the object at ffff888025a01d40
which belongs to the cache task_struct of size 7232
The buggy address is located 2420 bytes inside of
7232-byte region [ffff888025a01d40, ffff888025a03980)
The buggy address belongs to the physical page:
page:ffffea0000968000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25a00
head:ffffea0000968000 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0000820e00 dead000000000002 ffff8880119d53c0
raw: 0000000000000000 0000000080040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 51, tgid 51 (kworker/u4:3), ts 8817484297, free_ts 0
prep_new_page mm/page_alloc.c:2538 [inline]
get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4287
__alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5554
alloc_pages+0x1a6/0x270 mm/mempolicy.c:2285
alloc_slab_page mm/slub.c:1794 [inline]
allocate_slab+0x213/0x300 mm/slub.c:1939
new_slab mm/slub.c:1992 [inline]
___slab_alloc+0xa91/0x1400 mm/slub.c:3180
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3279
slab_alloc_node mm/slub.c:3364 [inline]
kmem_cache_alloc_node+0x189/0x400 mm/slub.c:3443
alloc_task_struct_node kernel/fork.c:171 [inline]
dup_task_struct kernel/fork.c:966 [inline]
copy_process+0x5c2/0x7190 kernel/fork.c:2084
kernel_clone+0xe7/0x980 kernel/fork.c:2671
user_mode_thread+0xad/0xe0 kernel/fork.c:2747
call_usermodehelper_exec_work kernel/umh.c:175 [inline]
call_usermodehelper_exec_work+0xcc/0x180 kernel/umh.c:161
process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
page_owner free stack trace missing
Memory state around the buggy address:
ffff888025a02580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888025a02600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888025a02680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888025a02700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888025a02780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 89 de mov %ebx,%esi
2: e8 06 f9 ea f7 callq 0xf7eaf90d
7: 84 db test %bl,%bl
9: 75 ac jne 0xffffffb7
b: e8 6d fc ea f7 callq 0xf7eafc7d
10: e8 28 73 f1 f7 callq 0xf7f1733d
15: eb 0c jmp 0x23
17: e8 61 fc ea f7 callq 0xf7eafc7d
1c: 0f 00 2d da fd c2 00 verw 0xc2fdda(%rip) # 0xc2fdfd
23: e8 55 fc ea f7 callq 0xf7eafc7d
28: fb sti
29: f4 hlt
* 2a: 9c pushfq <-- trapping instruction
2b: 5b pop %rbx
2c: 81 e3 00 02 00 00 and $0x200,%ebx
32: fa cli
33: 31 ff xor %edi,%edi
35: 48 89 de mov %rbx,%rsi
38: e8 30 f9 ea f7 callq 0xf7eaf96d
3d: 48 85 db test %rbx,%rbx