==================================================================
BUG: KASAN: slab-use-after-free in __lock_acquire+0x77/0x1fd0 kernel/locking/lockdep.c:5005
Read of size 8 at addr ffff888076a76338 by task syz-executor.1/27769
CPU: 0 PID: 27769 Comm: syz-executor.1 Not tainted 6.8.0-rc6-syzkaller-00238-g5ad3cb0ed525 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x167/0x540 mm/kasan/report.c:488
kasan_report+0x142/0x180 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/0x1470 kernel/sched/core.c:4253
call_timer_fn+0x17e/0x600 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+0x2bb/0x942 kernel/softirq.c:553
invoke_softirq kernel/softirq.c:427 [inline]
__irq_exit_rcu+0xf1/0x1c0 kernel/softirq.c:632
irq_exit_rcu+0x9/0x30 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:lock_acquire+0x25a/0x530 kernel/locking/lockdep.c:5758
Code: 2b 00 74 08 4c 89 f7 e8 c4 24 81 00 f6 44 24 61 02 0f 85 8e 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000dc77620 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff92001b8eed0 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffffffff8baac7e0 RDI: ffffffff8bfd9a20
RBP: ffffc9000dc77768 R08: ffffffff92c5947f R09: 1ffffffff258b28f
R10: dffffc0000000000 R11: fffffbfff258b290 R12: 1ffff92001b8eecc
R13: dffffc0000000000 R14: ffffc9000dc77680 R15: 0000000000000246
local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
folio_add_lru+0x297/0x9e0 mm/swap.c:515
shmem_alloc_and_add_folio+0xa84/0xde0 mm/shmem.c:1722
shmem_get_folio_gfp+0x7c3/0x1ef0 mm/shmem.c:2052
shmem_get_folio mm/shmem.c:2134 [inline]
shmem_write_begin+0x170/0x4d0 mm/shmem.c:2717
generic_perform_write+0x321/0x640 mm/filemap.c:3930
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2893
call_write_iter include/linux/fs.h:2087 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa81/0xcb0 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f7a9d67caef
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48
RSP: 002b:00007f7a9e323e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f7a9d67caef
RDX: 0000000001000000 RSI: 00007f7a93c00000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000009600
R10: 0000000020009682 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f7a9e323f80 R14: 00007f7a9e323f40 R15: 00007f7a93c00000
Allocated by task 2:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
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+0x5d5/0x3fc0 kernel/fork.c:2327
kernel_clone+0x222/0x840 kernel/fork.c:2902
kernel_thread+0x1bc/0x240 kernel/fork.c:2964
create_kthread kernel/kthread.c:411 [inline]
kthreadd+0x60c/0x810 kernel/kthread.c:764
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Freed by task 16:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:589
poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
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+0x115/0x2d0 kernel/exit.c:229
rcu_do_batch kernel/rcu/tree.c:2190 [inline]
rcu_core+0xd76/0x1810 kernel/rcu/tree.c:2465
__do_softirq+0x2bb/0x942 kernel/softirq.c:553
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:551
__call_rcu_common kernel/rcu/tree.c:2715 [inline]
call_rcu+0x167/0xa80 kernel/rcu/tree.c:2829
context_switch kernel/sched/core.c:5403 [inline]
__schedule+0x1787/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
do_nanosleep+0x196/0x600 kernel/time/hrtimer.c:2048
hrtimer_nanosleep+0x226/0x470 kernel/time/hrtimer.c:2101
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline]
__se_sys_clock_nanosleep+0x32a/0x3c0 kernel/time/posix-timers.c:1373
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
The buggy address belongs to the object at ffff888076a75940
which belongs to the cache task_struct of size 7360
The buggy address is located 2552 bytes inside of
freed 7360-byte region [ffff888076a75940, ffff888076a77600)
The buggy address belongs to the physical page:
page:ffffea0001da9c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76a70
head:ffffea0001da9c00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff8880742aa741
flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000840 ffff888015ae6500 ffffea0000a3a200 dead000000000002
raw: 0000000000000000 0000000000040004 00000001ffffffff ffff8880742aa741
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 4497, tgid 4497 (acpid), ts 18003384652, free_ts 15872183229
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
prep_new_page mm/page_alloc.c:1540 [inline]
get_page_from_freelist+0x33ea/0x3580 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+0xd17/0x13e0 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+0x245/0x380 mm/slub.c:3903
alloc_task_struct_node kernel/fork.c:174 [inline]
dup_task_struct+0x57/0x7d0 kernel/fork.c:1104
copy_process+0x5d5/0x3fc0 kernel/fork.c:2327
kernel_clone+0x222/0x840 kernel/fork.c:2902
__do_sys_clone kernel/fork.c:3045 [inline]
__se_sys_clone kernel/fork.c:3029 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:3029
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1140 [inline]
free_unref_page_prepare+0x95d/0xa80 mm/page_alloc.c:2346
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2486
free_contig_range+0x9e/0x160 mm/page_alloc.c:6535
destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1036
debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1416
do_one_initcall+0x238/0x830 init/main.c:1236
do_initcall_level+0x157/0x210 init/main.c:1298
do_initcalls+0x3f/0x80 init/main.c:1314
kernel_init_freeable+0x42f/0x5d0 init/main.c:1551
kernel_init+0x1d/0x2a0 init/main.c:1441
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
Memory state around the buggy address:
ffff888076a76200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888076a76280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888076a76300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888076a76380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888076a76400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess):
0: 2b 00 sub (%rax),%eax
2: 74 08 je 0xc
4: 4c 89 f7 mov %r14,%rdi
7: e8 c4 24 81 00 call 0x8124d0
c: f6 44 24 61 02 testb $0x2,0x61(%rsp)
11: 0f 85 8e 01 00 00 jne 0x1a5
17: 41 f7 c7 00 02 00 00 test $0x200,%r15d
1e: 74 01 je 0x21
20: fb sti
21: 48 c7 44 24 40 0e 36 movq $0x45e0360e,0x40(%rsp)
28: e0 45
* 2a: 4b c7 44 25 00 00 00 movq $0x0,0x0(%r13,%r12,1) <-- trapping instruction
31: 00 00
33: 43 c7 44 25 09 00 00 movl $0x0,0x9(%r13,%r12,1)
3a: 00 00
3c: 43 rex.XB
3d: c7 .byte 0xc7
3e: 44 rex.R
3f: 25 .byte 0x25