NILFS (loop0): disposed unprocessed dirty file(s) when stopping log writer
NILFS (loop2): disposed unprocessed dirty file(s) when stopping log writer
NILFS (loop4): disposed unprocessed dirty file(s) when stopping log writer
==================================================================
BUG: KASAN: use-after-free in __lock_acquire+0x2c57/0x3f20 kernel/locking/lockdep.c:3369
Read of size 8 at addr ffff88804c9ace20 by task swapper/0/0
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.305-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:251
kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:350
kasan_report mm/kasan/report.c:408 [inline]
__asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:429
__lock_acquire+0x2c57/0x3f20 kernel/locking/lockdep.c:3369
lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160
try_to_wake_up+0x6a/0x1100 kernel/sched/core.c:2000
call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280
expire_timers+0x232/0x4d0 kernel/time/timer.c:1319
__run_timers kernel/time/timer.c:1637 [inline]
run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650
__do_softirq+0x24d/0x9ff kernel/softirq.c:288
invoke_softirq kernel/softirq.c:368 [inline]
irq_exit+0x193/0x240 kernel/softirq.c:409
exiting_irq arch/x86/include/asm/apic.h:638 [inline]
smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106
apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:796
</IRQ>
RIP: 0010:native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:61
RSP: 0018:ffffffff88e07e78 EFLAGS: 000002c6 ORIG_RAX: ffffffffffffff10
RAX: 1ffffffff11e13dc RBX: dffffc0000000000 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff88e74d04
RBP: ffffffff88f09ed0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: fffffbfff11ce890
R13: ffffffff88e74480 R14: 0000000000000000 R15: 0000000000000000
arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline]
default_idle+0x47/0x370 arch/x86/kernel/process.c:558
cpuidle_idle_call kernel/sched/idle.c:156 [inline]
do_idle+0x250/0x3c0 kernel/sched/idle.c:246
cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:351
start_kernel+0x743/0x763 init/main.c:712
secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240
Allocated by task 2:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
kmem_cache_alloc_node+0x146/0x410 mm/slab.c:3642
alloc_task_struct_node kernel/fork.c:156 [inline]
dup_task_struct kernel/fork.c:515 [inline]
copy_process.part.0+0x17d3/0x71c0 kernel/fork.c:1631
copy_process kernel/fork.c:1606 [inline]
_do_fork+0x184/0xc80 kernel/fork.c:2092
kernel_thread+0x2f/0x40 kernel/fork.c:2154
create_kthread kernel/kthread.c:255 [inline]
kthreadd+0x51a/0x770 kernel/kthread.c:592
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
Freed by task 9571:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
__cache_free mm/slab.c:3496 [inline]
kmem_cache_free+0x7c/0x2b0 mm/slab.c:3758
__put_task_struct+0x276/0x470 kernel/fork.c:420
put_task_struct include/linux/sched/task.h:99 [inline]
delayed_put_task_struct+0x1fb/0x2e0 kernel/exit.c:227
__rcu_reclaim kernel/rcu/rcu.h:195 [inline]
rcu_do_batch kernel/rcu/tree.c:2699 [inline]
invoke_rcu_callbacks kernel/rcu/tree.c:2962 [inline]
__rcu_process_callbacks kernel/rcu/tree.c:2929 [inline]
rcu_process_callbacks+0x780/0x1180 kernel/rcu/tree.c:2946
__do_softirq+0x24d/0x9ff kernel/softirq.c:288
The buggy address belongs to the object at ffff88804c9ac640
which belongs to the cache task_struct of size 6144
The buggy address is located 2016 bytes inside of
6144-byte region [ffff88804c9ac640, ffff88804c9ade40)
The buggy address belongs to the page:
page:ffffea0001326b00 count:1 mapcount:0 mapping:ffff88804c9ac640 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff88804c9ac640 0000000000000000 0000000100000001
raw: ffffea00028eefa0 ffffea0001326ea0 ffff88823f8307c0 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88804c9acd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804c9acd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88804c9ace00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88804c9ace80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804c9acf00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================