==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc9000492f7c0 by task syz-executor/9142
CPU: 1 PID: 9142 Comm: syz-executor Not tainted 6.1.96-syzkaller #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+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15f/0x4f0 mm/kasan/report.c:395
kasan_report+0x136/0x160 mm/kasan/report.c:495
profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
profile_tick+0xee/0x170 kernel/profile.c:339
tick_sched_handle kernel/time/tick-sched.c:255 [inline]
tick_sched_timer+0x390/0x550 kernel/time/tick-sched.c:1501
__run_hrtimer kernel/time/hrtimer.c:1686 [inline]
__hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 c2 b8 4c f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 67 06 c9 f6 65 8b 05 08 13 6d 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc9000492f7c0 EFLAGS: 00000206
RAX: eeb00f7b1ebe4e00 RBX: 1ffff92000925efc RCX: ffffffff91c94103
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001
RBP: ffffc9000492f850 R08: dffffc0000000000 R09: ffffed10050adc0d
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000925ef8 R14: ffffc9000492f7e0 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
__wake_up_common_lock kernel/sched/wait.c:140 [inline]
__wake_up+0x128/0x1c0 kernel/sched/wait.c:160
fsnotify_insert_event+0x345/0x410 fs/notify/notification.c:127
fsnotify_add_event include/linux/fsnotify_backend.h:627 [inline]
inotify_handle_inode_event+0x3b2/0x530 fs/notify/inotify/inotify_fsnotify.c:126
fsnotify_handle_inode_event fs/notify/fsnotify.c:264 [inline]
fsnotify_handle_event fs/notify/fsnotify.c:316 [inline]
send_to_group fs/notify/fsnotify.c:364 [inline]
fsnotify+0x1c13/0x2470 fs/notify/fsnotify.c:570
__fsnotify_parent+0x4bb/0x730 fs/notify/fsnotify.c:230
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:99 [inline]
fsnotify_close include/linux/fsnotify.h:341 [inline]
__fput+0x2c6/0x890 fs/file_table.c:306
task_work_run+0x246/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa2aef748ca
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 73 8a 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 d3 8a 02 00 8b 44 24
RSP: 002b:00007ffc606b3ef0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007fa2aef748ca
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007ffc606b3f6c R08: 0000000000000000 R09: 00007ffc606b3c57
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 0000000000058572 R14: 000000000005855e R15: 0000000000000002
The buggy address belongs to stack of task syz-executor/9142
and is located at offset 0 in frame:
_raw_spin_unlock_irqrestore+0x0/0x130
This frame has 1 object:
[32, 40) 'flags.i.i.i.i'
The buggy address belongs to the virtual mapping at
[ffffc90004928000, ffffc90004931000) created by:
copy_process+0x637/0x4060 kernel/fork.c:2098
The buggy address belongs to the physical page:
page:ffffea000198e680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6639a
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 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 9135, tgid 9135 (syz-executor), ts 319014968437, free_ts 277165625880
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513
prep_new_page mm/page_alloc.c:2520 [inline]
get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279
__alloc_pages+0x28d/0x770 mm/page_alloc.c:5547
vm_area_alloc_pages mm/vmalloc.c:2992 [inline]
__vmalloc_area_node mm/vmalloc.c:3068 [inline]
__vmalloc_node_range+0x92b/0x1490 mm/vmalloc.c:3240
alloc_thread_stack_node kernel/fork.c:311 [inline]
dup_task_struct+0x3e5/0x6d0 kernel/fork.c:988
copy_process+0x637/0x4060 kernel/fork.c:2098
kernel_clone+0x222/0x920 kernel/fork.c:2682
__do_sys_clone kernel/fork.c:2823 [inline]
__se_sys_clone kernel/fork.c:2807 [inline]
__x64_sys_clone+0x231/0x280 kernel/fork.c:2807
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1440 [inline]
free_pcp_prepare mm/page_alloc.c:1490 [inline]
free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358
free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453
__vunmap+0x834/0x9a0 mm/vmalloc.c:2717
kcov_put kernel/kcov.c:428 [inline]
kcov_close+0x27/0x50 kernel/kcov.c:524
__fput+0x3b7/0x890 fs/file_table.c:320
task_work_run+0x246/0x300 kernel/task_work.c:179
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa73/0x26a0 kernel/exit.c:869
do_group_exit+0x202/0x2b0 kernel/exit.c:1019
get_signal+0x16f7/0x17d0 kernel/signal.c:2862
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
Memory state around the buggy address:
ffffc9000492f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000492f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000492f780: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3
^
ffffc9000492f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000492f880: f1 f1 f1 f1 00 00 00 00 00 f3 f3 f3 f3 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 c2 b8 4c f7 call 0xf74cb8d6
14: f6 44 24 21 02 testb $0x2,0x21(%rsp)
19: 75 4e jne 0x69
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 67 06 c9 f6 call 0xf6c90696 <-- trapping instruction
2f: 65 8b 05 08 13 6d 75 mov %gs:0x756d1308(%rip),%eax # 0x756d133e
36: 85 c0 test %eax,%eax
38: 74 3f je 0x79
3a: 48 rex.W
3b: c7 .byte 0xc7
3c: 04 24 add $0x24,%al
3e: 0e (bad)
3f: 36 ss