==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xd2/0x170 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc900001e76a0 by task kworker/1:0/24
CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events free_ipc
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
profile_pc+0xd2/0x170 arch/x86/kernel/time.c:42
profile_tick+0xd7/0x150 kernel/profile.c:339
tick_sched_handle kernel/time/tick-sched.c:274 [inline]
tick_nohz_handler+0x3a8/0x540 kernel/time/tick-sched.c:294
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x54b/0xd00 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x107/0x3a0 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd8/0x140 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 fe 9e 7e f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 c3 94 ee f5 65 8b 05 d4 79 8d 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc900001e76a0 EFLAGS: 00000206
RAX: f84a17b1fab1c500 RBX: 1ffff9200003ced8 RCX: ffffffff81720b2a
RDX: dffffc0000000000 RSI: ffffffff8baac1e0 RDI: 0000000000000001
RBP: ffffc900001e7730 R08: ffffffff92cae517 R09: 1ffffffff2595ca2
R10: dffffc0000000000 R11: fffffbfff2595ca3 R12: dffffc0000000000
R13: 1ffff9200003ced4 R14: ffffc900001e76c0 R15: 0000000000000246
kthread_queue_work+0x110/0x180 kernel/kthread.c:1024
synchronize_rcu_expedited_queue_work kernel/rcu/tree_exp.h:469 [inline]
synchronize_rcu_expedited+0x593/0x820 kernel/rcu/tree_exp.h:949
synchronize_rcu+0x136/0x3e0 kernel/rcu/tree.c:3611
free_ipc+0xb7/0x280 ipc/namespace.c:176
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa00/0x1770 kernel/workqueue.c:3335
worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
The buggy address belongs to stack of task kworker/1:0/24
and is located at offset 0 in frame:
_raw_spin_unlock_irqrestore+0x0/0x140 kernel/locking/spinlock.c:187
This frame has 1 object:
[32, 40) 'flags.i.i.i.i'
The buggy address belongs to the virtual mapping at
[ffffc900001e0000, ffffc900001e9000) created by:
copy_process+0x5d1/0x3df0 kernel/fork.c:2219
The buggy address belongs to the physical page:
page:ffffea00005da6c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1769b
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 2, tgid 2 (kthreadd), ts 4233659110, free_ts 0
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+0x256/0x680 mm/page_alloc.c:4569
__alloc_pages_node include/linux/gfp.h:238 [inline]
alloc_pages_node include/linux/gfp.h:261 [inline]
vm_area_alloc_pages mm/vmalloc.c:3137 [inline]
__vmalloc_area_node mm/vmalloc.c:3211 [inline]
__vmalloc_node_range+0x9c2/0x14a0 mm/vmalloc.c:3392
alloc_thread_stack_node kernel/fork.c:309 [inline]
dup_task_struct+0x3e9/0x7d0 kernel/fork.c:1114
copy_process+0x5d1/0x3df0 kernel/fork.c:2219
kernel_clone+0x223/0x840 kernel/fork.c:2796
kernel_thread+0x1bc/0x240 kernel/fork.c:2858
create_kthread kernel/kthread.c:411 [inline]
kthreadd+0x60d/0x810 kernel/kthread.c:764
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
page_owner free stack trace missing
Memory state around the buggy address:
ffffc900001e7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900001e7600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900001e7680: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00
^
ffffc900001e7700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900001e7780: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 f2 f2 f2
==================================================================
----------------
Code disassembly (best guess):
0: 9c pushf
1: 8f 44 24 20 pop 0x20(%rsp)
5: 42 80 3c 23 00 cmpb $0x0,(%rbx,%r12,1)
a: 74 08 je 0x14
c: 4c 89 f7 mov %r14,%rdi
f: e8 fe 9e 7e f6 call 0xf67e9f12
14: f6 44 24 21 02 testb $0x2,0x21(%rsp)
19: 75 52 jne 0x6d
1b: 41 f7 c7 00 02 00 00 test $0x200,%r15d
22: 74 01 je 0x25
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 c3 94 ee f5 call 0xf5ee94f2 <-- trapping instruction
2f: 65 8b 05 d4 79 8d 74 mov %gs:0x748d79d4(%rip),%eax # 0x748d7a0a
36: 85 c0 test %eax,%eax
38: 74 43 je 0x7d
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss