==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x4208/0x5de0 kernel/locking/lockdep.c:5012
Read of size 8 at addr ffff888029196bc0 by task syz-executor300/5160
CPU: 1 PID: 5160 Comm: syz-executor300 Not tainted 6.5.0-rc3-syzkaller-00283-g12214540ad87 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
__lock_acquire+0x4208/0x5de0 kernel/locking/lockdep.c:5012
lock_acquire kernel/locking/lockdep.c:5761 [inline]
lock_acquire+0x1ae/0x510 kernel/locking/lockdep.c:5726
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x50 kernel/locking/spinlock.c:162
try_to_wake_up+0xab/0x15a0 kernel/sched/core.c:4229
call_timer_fn+0x1a0/0x580 kernel/time/timer.c:1700
expire_timers kernel/time/timer.c:1751 [inline]
__run_timers+0x764/0xb10 kernel/time/timer.c:2022
run_timer_softirq+0x58/0xd0 kernel/time/timer.c:2035
__do_softirq+0x218/0x965 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu kernel/softirq.c:632 [inline]
irq_exit_rcu+0xb7/0x120 kernel/softirq.c:644
sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1109
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1972 [inline]
RIP: 0010:vprintk_emit+0x3f6/0x640 kernel/printk/printk.c:2306
Code: 00 00 e8 dd 1d 1c 00 9c 8f 45 d0 48 8b 45 d0 31 ff 25 00 02 00 00 49 89 c6 48 89 c6 e8 53 19 1c 00 4d 85 f6 0f 85 fa 01 00 00 0f 1e fa e8 b1 1d 1c 00 45 31 c9 41 b8 01 00 00 00 31 c9 68 b6
RSP: 0018:ffffc9000381f7f8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000037 RCX: 0000000000000000
RDX: ffff888029364180 RSI: ffffffff81696daa RDI: 0000000000000007
RBP: ffffc9000381f830 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 206b6361626c6c6f R12: 0000000000000200
R13: ffff8880244560c0 R14: 0000000000000001 R15: 0000000000000000
vprintk+0x89/0xa0 kernel/printk/printk_safe.c:50
_printk+0xc8/0x100 kernel/printk/printk.c:2328
__nilfs_msg+0x159/0x2c0 fs/nilfs2/super.c:78
load_nilfs+0xa38/0x12d0 fs/nilfs2/the_nilfs.c:265
nilfs_fill_super fs/nilfs2/super.c:1090 [inline]
nilfs_mount+0xa8c/0x1120 fs/nilfs2/super.c:1343
legacy_get_tree+0x109/0x220 fs/fs_context.c:611
vfs_get_tree+0x88/0x350 fs/super.c:1519
do_new_mount fs/namespace.c:3335 [inline]
path_mount+0x1492/0x1ed0 fs/namespace.c:3662
do_mount fs/namespace.c:3675 [inline]
__do_sys_mount fs/namespace.c:3884 [inline]
__se_sys_mount fs/namespace.c:3861 [inline]
__x64_sys_mount+0x293/0x310 fs/namespace.c:3861
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f426494565a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffe15d0268 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f426494565a
RDX: 0000000020000dc0 RSI: 0000000020000100 RDI: 00007fffe15d02b0
RBP: 0000000000000004 R08: 00007fffe15d02f0 R09: 0000000000000da0
R10: 0000000000010018 R11: 0000000000000286 R12: 00007fffe15d02b0
R13: 00007fffe15d02f0 R14: 0000000000200000 R15: 0000000000000003
Allocated by task 2:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
__kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:762 [inline]
slab_alloc_node mm/slab.c:3237 [inline]
kmem_cache_alloc_node+0x179/0x540 mm/slab.c:3509
alloc_task_struct_node kernel/fork.c:173 [inline]
dup_task_struct kernel/fork.c:1105 [inline]
copy_process+0x41c/0x7400 kernel/fork.c:2330
kernel_clone+0xfd/0x8f0 kernel/fork.c:2912
kernel_thread+0xc0/0x100 kernel/fork.c:2974
create_kthread kernel/kthread.c:412 [inline]
kthreadd+0x4fc/0x7b0 kernel/kthread.c:747
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
Last potentially related work creation:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
__kasan_record_aux_stack+0x78/0x80 mm/kasan/generic.c:492
__call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2649
put_task_struct_rcu_user kernel/exit.c:232 [inline]
put_task_struct_rcu_user+0x87/0xc0 kernel/exit.c:229
context_switch kernel/sched/core.c:5384 [inline]
__schedule+0xee9/0x59f0 kernel/sched/core.c:6710
schedule+0xe7/0x1b0 kernel/sched/core.c:6786
nilfs_segctor_thread+0xb77/0xe90 fs/nilfs2/segment.c:2629
kthread+0x33a/0x430 kernel/kthread.c:389
ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
Second to last potentially related work creation:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
__kasan_record_aux_stack+0x78/0x80 mm/kasan/generic.c:492
__call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2649
put_task_struct_rcu_user kernel/exit.c:232 [inline]
put_task_struct_rcu_user+0x87/0xc0 kernel/exit.c:229
release_task+0xf0a/0x1b90 kernel/exit.c:282
wait_task_zombie kernel/exit.c:1210 [inline]
wait_consider_task+0x17c9/0x3f70 kernel/exit.c:1437
do_wait_thread kernel/exit.c:1500 [inline]
do_wait+0x72b/0xc70 kernel/exit.c:1617
kernel_wait4+0x16d/0x280 kernel/exit.c:1780
__do_sys_wait4+0x15b/0x170 kernel/exit.c:1808
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
The buggy address belongs to the object at ffff8880291961c0
which belongs to the cache task_struct of size 7360
The buggy address is located 2560 bytes inside of
freed 7360-byte region [ffff8880291961c0, ffff888029197e80)
The buggy address belongs to the physical page:
page:ffffea0000a46580 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x29196
head:ffffea0000a46580 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0x1()
raw: 00fff00000010200 ffff888140051500 ffffea0000a4d910 ffffea0000a64110
raw: 0000000000000000 ffff8880291961c0 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 4787, tgid 4787 (dhcpcd-run-hook), ts 37936572759, free_ts 37910020491
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1570
prep_new_page mm/page_alloc.c:1577 [inline]
get_page_from_freelist+0x10a9/0x31e0 mm/page_alloc.c:3221
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4477
__alloc_pages_node include/linux/gfp.h:237 [inline]
kmem_getpages mm/slab.c:1356 [inline]
cache_grow_begin+0x99/0x3a0 mm/slab.c:2550
cache_alloc_refill+0x294/0x3a0 mm/slab.c:2923
____cache_alloc mm/slab.c:2999 [inline]
____cache_alloc mm/slab.c:2982 [inline]
__do_cache_alloc mm/slab.c:3182 [inline]
slab_alloc_node mm/slab.c:3230 [inline]
kmem_cache_alloc_node+0x487/0x540 mm/slab.c:3509
alloc_task_struct_node kernel/fork.c:173 [inline]
dup_task_struct kernel/fork.c:1105 [inline]
copy_process+0x41c/0x7400 kernel/fork.c:2330
kernel_clone+0xfd/0x8f0 kernel/fork.c:2912
__do_sys_clone+0xba/0x100 kernel/fork.c:3055
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1161 [inline]
free_unref_page_prepare+0x508/0xb90 mm/page_alloc.c:2348
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2443
slab_destroy mm/slab.c:1608 [inline]
slabs_destroy+0x85/0xc0 mm/slab.c:1628
cache_flusharray mm/slab.c:3341 [inline]
___cache_free+0x2b6/0x420 mm/slab.c:3404
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x4c/0x1b0 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x18b/0x1d0 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook mm/slab.h:762 [inline]
slab_alloc_node mm/slab.c:3237 [inline]
slab_alloc mm/slab.c:3246 [inline]
__kmem_cache_alloc_lru mm/slab.c:3423 [inline]
kmem_cache_alloc+0x15e/0x400 mm/slab.c:3432
getname_flags.part.0+0x50/0x4d0 fs/namei.c:140
getname_flags+0x9c/0xf0 include/linux/audit.h:319
vfs_fstatat+0x77/0xb0 fs/stat.c:275
__do_sys_newfstatat+0x98/0x110 fs/stat.c:446
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffff888029196a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888029196b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888029196b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888029196c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888029196c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: e8 dd 1d 1c 00 call 0x1c1de4
7: 9c pushf
8: 8f 45 d0 pop -0x30(%rbp)
b: 48 8b 45 d0 mov -0x30(%rbp),%rax
f: 31 ff xor %edi,%edi
11: 25 00 02 00 00 and $0x200,%eax
16: 49 89 c6 mov %rax,%r14
19: 48 89 c6 mov %rax,%rsi
1c: e8 53 19 1c 00 call 0x1c1974
21: 4d 85 f6 test %r14,%r14
24: 0f 85 fa 01 00 00 jne 0x224
* 2a: f3 0f 1e fa endbr64 <-- trapping instruction
2e: e8 b1 1d 1c 00 call 0x1c1de4
33: 45 31 c9 xor %r9d,%r9d
36: 41 b8 01 00 00 00 mov $0x1,%r8d
3c: 31 c9 xor %ecx,%ecx
3e: 68 .byte 0x68
3f: b6 .byte 0xb6