==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xd2/0x170 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc900090df3e0 by task syz.2.2400/16200
CPU: 0 PID: 16200 Comm: syz.2.2400 Not tainted 6.10.0-rc5-syzkaller-00243-g6c0483dbfe72 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
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+0x551/0xd50 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+0x110/0x3f0 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 0e 1a 6b f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 83 d7 d4 f5 65 8b 05 14 0f 73 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc900090df3e0 EFLAGS: 00000206
RAX: de4c250fa6557800 RBX: 1ffff9200121be80 RCX: ffffffff8172d9ea
RDX: dffffc0000000000 RSI: ffffffff8bcabb40 RDI: 0000000000000001
RBP: ffffc900090df478 R08: ffffffff92fa8587 R09: 1ffffffff25f50b0
R10: dffffc0000000000 R11: fffffbfff25f50b1 R12: dffffc0000000000
R13: 1ffff9200121be7c R14: ffffc900090df400 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
rmqueue_bulk mm/page_alloc.c:2261 [inline]
__rmqueue_pcplist+0x1e66/0x22c0 mm/page_alloc.c:2934
rmqueue_pcplist mm/page_alloc.c:2976 [inline]
rmqueue mm/page_alloc.c:3013 [inline]
get_page_from_freelist+0x85a/0x2f10 mm/page_alloc.c:3422
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
vm_area_alloc_pages mm/vmalloc.c:3575 [inline]
__vmalloc_area_node mm/vmalloc.c:3651 [inline]
__vmalloc_node_range_noprof+0x971/0x1460 mm/vmalloc.c:3832
__vmalloc_node_noprof mm/vmalloc.c:3897 [inline]
vzalloc_noprof+0x79/0x90 mm/vmalloc.c:3970
profile_init+0xee/0x130 kernel/profile.c:131
profiling_store+0x5e/0xc0 kernel/ksysfs.c:104
kernfs_fop_write_iter+0x3a1/0x500 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa72/0xc90 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4094f75b99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4095d5c048 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f4095104078 RCX: 00007f4094f75b99
RDX: 0000000000000015 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 00007f4094ff677e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f4095104078 R15: 00007f409522fa68
The buggy address belongs to stack of task syz.2.2400/16200
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
[ffffc900090d8000, ffffc900090e1000) 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:0xffff88802c5f6980 pfn:0x2c5f6
memcg:ffff888021e8a782
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: ffff88802c5f6980 0000000000000000 00000001ffffffff ffff888021e8a782
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 15784, tgid 15784 (syz-executor), ts 647224289363, free_ts 646982340277
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473
prep_new_page mm/page_alloc.c:1481 [inline]
get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425
__alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
vm_area_alloc_pages mm/vmalloc.c:3575 [inline]
__vmalloc_area_node mm/vmalloc.c:3651 [inline]
__vmalloc_node_range_noprof+0x971/0x1460 mm/vmalloc.c:3832
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
__do_sys_clone kernel/fork.c:2940 [inline]
__se_sys_clone kernel/fork.c:2924 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:2924
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 11 tgid 11 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1093 [inline]
free_unref_page+0xd22/0xea0 mm/page_alloc.c:2588
__slab_free+0x31b/0x3d0 mm/slub.c:4349
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3940 [inline]
slab_alloc_node mm/slub.c:4002 [inline]
kmem_cache_alloc_node_noprof+0x16b/0x320 mm/slub.c:4045
__alloc_skb+0x1c3/0x440 net/core/skbuff.c:656
alloc_skb include/linux/skbuff.h:1308 [inline]
nlmsg_new include/net/netlink.h:1015 [inline]
br_vlan_notify+0x284/0x770 net/bridge/br_vlan.c:1899
nbp_vlan_flush+0x108/0x1b0 net/bridge/br_vlan.c:1373
del_nbp+0x651/0xb40 net/bridge/br_if.c:356
br_dev_delete+0x6e/0x100 net/bridge/br_if.c:386
br_net_exit_batch_rtnl+0xf2/0x1a0 net/bridge/br.c:369
cleanup_net+0x709/0xcc0 net/core/net_namespace.c:633
process_one_work kernel/workqueue.c:3248 [inline]
process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
kthread+0x2f0/0x390 kernel/kthread.c:389
Memory state around the buggy address:
ffffc900090df280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900090df300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900090df380: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
^
ffffc900090df400: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900090df480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
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 0e 1a 6b f6 call 0xf66b1a22
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 83 d7 d4 f5 call 0xf5d4d7b2 <-- trapping instruction
2f: 65 8b 05 14 0f 73 74 mov %gs:0x74730f14(%rip),%eax # 0x74730f4a
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