==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xd2/0x170 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc9000bcd7260 by task kworker/u8:8/3883
CPU: 0 PID: 3883 Comm: kworker/u8:8 Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: netns cleanup_net
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:277 [inline]
tick_nohz_handler+0x386/0x500 kernel/time/tick-sched.c:297
__run_hrtimer kernel/time/hrtimer.c:1687 [inline]
__hrtimer_run_queues+0x553/0xd50 kernel/time/hrtimer.c:1751
hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1813
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x112/0x3f0 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 1e 21 6b f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 d3 e9 d4 f5 65 8b 05 44 23 73 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc9000bcd7260 EFLAGS: 00000206
RAX: bbc8f4d5797fbc00 RBX: 1ffff9200179ae50 RCX: ffffffff8172d80a
RDX: dffffc0000000000 RSI: ffffffff8bcabb80 RDI: 0000000000000001
RBP: ffffc9000bcd72f0 R08: ffffffff92fa758f R09: 1ffffffff25f4eb1
R10: dffffc0000000000 R11: fffffbfff25f4eb2 R12: dffffc0000000000
R13: 1ffff9200179ae4c R14: ffffc9000bcd7280 R15: 0000000000000246
debug_object_active_state+0x239/0x360 lib/debugobjects.c:945
debug_rcu_head_queue kernel/rcu/rcu.h:228 [inline]
__call_rcu_common kernel/rcu/tree.c:3057 [inline]
call_rcu+0xb5/0xa70 kernel/rcu/tree.c:3176
kernfs_put+0x1dc/0x370 fs/kernfs/dir.c:578
kernfs_remove_by_name_ns+0xe4/0x160 fs/kernfs/dir.c:1695
kernfs_remove_by_name include/linux/kernfs.h:625 [inline]
remove_files fs/sysfs/group.c:28 [inline]
sysfs_remove_group+0xfe/0x2c0 fs/sysfs/group.c:319
sysfs_remove_groups+0x54/0xb0 fs/sysfs/group.c:343
device_remove_groups drivers/base/core.c:2833 [inline]
device_remove_attrs+0x1dc/0x290 drivers/base/core.c:2963
device_del+0x572/0x9b0 drivers/base/core.c:3867
unregister_netdevice_many_notify+0x11b7/0x16b0 net/core/dev.c:11249
unregister_netdevice_many net/core/dev.c:11277 [inline]
default_device_exit_batch+0xa0f/0xa90 net/core/dev.c:11760
ops_exit_list net/core/net_namespace.c:178 [inline]
cleanup_net+0x89f/0xcc0 net/core/net_namespace.c:640
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to stack of task kworker/u8:8/3883
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
[ffffc9000bcd0000, ffffc9000bcd9000) created by:
copy_process+0x5d1/0x3dc0 kernel/fork.c:2220
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2d5ad
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
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 12, tgid 12 (kworker/u8:1), ts 19866162866, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468
prep_new_page mm/page_alloc.c:1476 [inline]
get_page_from_freelist+0x2e43/0x2f00 mm/page_alloc.c:3420
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4678
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
vm_area_alloc_pages mm/vmalloc.c:3566 [inline]
__vmalloc_area_node mm/vmalloc.c:3642 [inline]
__vmalloc_node_range_noprof+0x971/0x1460 mm/vmalloc.c:3823
alloc_thread_stack_node kernel/fork.c:309 [inline]
dup_task_struct+0x444/0x8c0 kernel/fork.c:1115
copy_process+0x5d1/0x3dc0 kernel/fork.c:2220
kernel_clone+0x226/0x8f0 kernel/fork.c:2797
user_mode_thread+0x132/0x1a0 kernel/fork.c:2875
call_usermodehelper_exec_work+0x5c/0x230 kernel/umh.c:172
process_one_work kernel/workqueue.c:3231 [inline]
process_scheduled_works+0xa2e/0x1830 kernel/workqueue.c:3312
worker_thread+0x86d/0xd70 kernel/workqueue.c:3393
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
page_owner free stack trace missing
Memory state around the buggy address:
ffffc9000bcd7100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000bcd7180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000bcd7200: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
^
ffffc9000bcd7280: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000bcd7300: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 f3 f3 f3
==================================================================
----------------
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 1e 21 6b f6 call 0xf66b2132
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 d3 e9 d4 f5 call 0xf5d4ea02 <-- trapping instruction
2f: 65 8b 05 44 23 73 74 mov %gs:0x74732344(%rip),%eax # 0x7473237a
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