==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
Read of size 8 at addr ffff88801ebaa7b8 by task swapper/1/0
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0-rc1-syzkaller-00026-g7ed2632ec7d7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x163/0x540 mm/kasan/report.c:488
kasan_report+0x142/0x170 mm/kasan/report.c:601
__lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:553 [inline]
try_to_wake_up+0xaf/0x1460 kernel/sched/core.c:4253
call_timer_fn+0x17a/0x5f0 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x621/0x830 kernel/time/timer.c:2038
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2051
__do_softirq+0x2b8/0x939 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu+0xf1/0x1b0 kernel/softirq.c:632
irq_exit_rcu+0x9/0x20 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x97/0xb0 arch/x86/kernel/apic/apic.c:1076
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:acpi_safe_halt+0x20/0x30 drivers/acpi/processor_idle.c:113
Code: 7f 04 eb 36 66 0f 1f 44 00 00 65 48 8b 05 78 0e dd 74 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d e6 7d a1 00 f3 0f 1e fa fb f4 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 89 fa ec 48 8b 05
RSP: 0018:ffffc90000187d08 EFLAGS: 00000246
RAX: ffff8880156ebb80 RBX: ffff8880131e0064 RCX: 00000000000a6cc9
RDX: 0000000000000001 RSI: ffff8880131e0000 RDI: ffff8880131e0064
RBP: 0000000000038f78 R08: ffff8880b9936d8b R09: 1ffff11017326db1
R10: dffffc0000000000 R11: ffffed1017326db2 R12: ffff888016b7e000
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8e090c00
acpi_idle_enter+0xe4/0x140 drivers/acpi/processor_idle.c:707
cpuidle_enter_state+0x114/0x480 drivers/cpuidle/cpuidle.c:267
cpuidle_enter+0x5d/0x90 drivers/cpuidle/cpuidle.c:388
call_cpuidle kernel/sched/idle.c:134 [inline]
cpuidle_idle_call kernel/sched/idle.c:215 [inline]
do_idle+0x374/0x5d0 kernel/sched/idle.c:312
cpu_startup_entry+0x41/0x60 kernel/sched/idle.c:410
start_secondary+0xee/0xf0 arch/x86/kernel/smpboot.c:336
secondary_startup_64_no_verify+0x171/0x17b
Allocated by task 2:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x70 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:314 [inline]
__kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:340
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3813 [inline]
slab_alloc_node mm/slub.c:3860 [inline]
kmem_cache_alloc_node+0x18f/0x380 mm/slub.c:3903
alloc_task_struct_node kernel/fork.c:174 [inline]
dup_task_struct+0x57/0x7d0 kernel/fork.c:1104
copy_process+0x5d1/0x3fb0 kernel/fork.c:2326
kernel_clone+0x222/0x840 kernel/fork.c:2901
kernel_thread+0x1bc/0x230 kernel/fork.c:2963
create_kthread kernel/kthread.c:411 [inline]
kthreadd+0x60c/0x810 kernel/kthread.c:764
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Freed by task 5092:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x70 mm/kasan/common.c:68
kasan_save_free_info+0x4e/0x60 mm/kasan/generic.c:640
poison_slab_object+0xa6/0xe0 mm/kasan/common.c:241
__kasan_slab_free+0x34/0x60 mm/kasan/common.c:257
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2121 [inline]
slab_free mm/slub.c:4299 [inline]
kmem_cache_free+0x102/0x2a0 mm/slub.c:4363
put_task_struct include/linux/sched/task.h:138 [inline]
delayed_put_task_struct+0x115/0x2c0 kernel/exit.c:229
rcu_do_batch kernel/rcu/tree.c:2158 [inline]
rcu_core+0xad8/0x17c0 kernel/rcu/tree.c:2433
__do_softirq+0x2b8/0x939 kernel/softirq.c:553
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xae/0x100 mm/kasan/generic.c:586
__call_rcu_common kernel/rcu/tree.c:2683 [inline]
call_rcu+0x167/0xa80 kernel/rcu/tree.c:2797
context_switch kernel/sched/core.c:5403 [inline]
__schedule+0x1787/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
nilfs_segctor_kill_thread fs/nilfs2/segment.c:2680 [inline]
nilfs_segctor_destroy fs/nilfs2/segment.c:2762 [inline]
nilfs_detach_log_writer+0x2e8/0xbe0 fs/nilfs2/segment.c:2851
nilfs_put_super+0x4d/0x160 fs/nilfs2/super.c:499
generic_shutdown_super+0x132/0x2c0 fs/super.c:646
kill_block_super+0x44/0x90 fs/super.c:1680
deactivate_locked_super+0xc1/0x130 fs/super.c:477
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267
task_work_run+0x24a/0x300 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:108 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x167/0x370 kernel/entry/common.c:212
do_syscall_64+0x102/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
The buggy address belongs to the object at ffff88801eba9dc0
which belongs to the cache task_struct of size 7360
The buggy address is located 2552 bytes inside of
freed 7360-byte region [ffff88801eba9dc0, ffff88801ebaba80)
The buggy address belongs to the physical page:
page:ffffea00007aea00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1eba8
head:ffffea00007aea00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88802c84de81
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff8880146a1500 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff88802c84de81
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 12, tgid 12 (kworker/u4:1), ts 7044743080, free_ts 0
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1533
prep_new_page mm/page_alloc.c:1540 [inline]
get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3311
__alloc_pages+0x255/0x680 mm/page_alloc.c:4567
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
alloc_slab_page+0x5f/0x160 mm/slub.c:2190
allocate_slab mm/slub.c:2354 [inline]
new_slab+0x84/0x2f0 mm/slub.c:2407
___slab_alloc+0xd17/0x13d0 mm/slub.c:3540
__slab_alloc mm/slub.c:3625 [inline]
__slab_alloc_node mm/slub.c:3678 [inline]
slab_alloc_node mm/slub.c:3850 [inline]
kmem_cache_alloc_node+0x241/0x380 mm/slub.c:3903
alloc_task_struct_node kernel/fork.c:174 [inline]
dup_task_struct+0x57/0x7d0 kernel/fork.c:1104
copy_process+0x5d1/0x3fb0 kernel/fork.c:2326
kernel_clone+0x222/0x840 kernel/fork.c:2901
user_mode_thread+0x132/0x190 kernel/fork.c:2979
call_usermodehelper_exec_work+0x5c/0x220 kernel/umh.c:172
process_one_work kernel/workqueue.c:2633 [inline]
process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2706
worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
page_owner free stack trace missing
Memory state around the buggy address:
ffff88801ebaa680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801ebaa700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88801ebaa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801ebaa800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88801ebaa880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 7f 04 jg 0x6
2: eb 36 jmp 0x3a
4: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
a: 65 48 8b 05 78 0e dd mov %gs:0x74dd0e78(%rip),%rax # 0x74dd0e8a
11: 74
12: 48 f7 00 08 00 00 00 testq $0x8,(%rax)
19: 75 10 jne 0x2b
1b: 66 90 xchg %ax,%ax
1d: 0f 00 2d e6 7d a1 00 verw 0xa17de6(%rip) # 0xa17e0a
24: f3 0f 1e fa endbr64
28: fb sti
29: f4 hlt
* 2a: fa cli <-- trapping instruction
2b: c3 ret
2c: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1)
33: 00 00 00
36: 0f 1f 40 00 nopl 0x0(%rax)
3a: 89 fa mov %edi,%edx
3c: ec in (%dx),%al
3d: 48 rex.W
3e: 8b .byte 0x8b
3f: 05 .byte 0x5