==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xd2/0x170 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc9000356eea0 by task syz.1.2202/15673
CPU: 0 PID: 15673 Comm: syz.1.2202 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:ffffc9000356eea0 EFLAGS: 00000206
RAX: 22b45d30fc62e500 RBX: 1ffff920006addd8 RCX: ffffffff8172d9ea
RDX: dffffc0000000000 RSI: ffffffff8bcabb40 RDI: 0000000000000001
RBP: ffffc9000356ef30 R08: ffffffff92fa85df R09: 1ffffffff25f50bb
R10: dffffc0000000000 R11: fffffbfff25f50bc R12: dffffc0000000000
R13: 1ffff920006addd4 R14: ffffc9000356eec0 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1636 [inline]
folio_batch_move_lru+0x5ba/0x690 mm/swap.c:226
folio_add_lru+0x475/0xd70 mm/swap.c:522
wp_page_copy mm/memory.c:3353 [inline]
do_wp_page+0x1c37/0x52f0 mm/memory.c:3677
handle_pte_fault+0x117e/0x7090 mm/memory.c:5397
__handle_mm_fault mm/memory.c:5524 [inline]
handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5689
do_user_addr_fault arch/x86/mm/fault.c:1389 [inline]
handle_page_fault arch/x86/mm/fault.c:1481 [inline]
exc_page_fault+0x2b9/0x8c0 arch/x86/mm/fault.c:1539
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0010:rep_movs_alternative+0x4a/0x70 arch/x86/lib/copy_user_64.S:71
Code: 75 f1 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 df 83 f9 08 73 e8 eb c9 a4 c3 cc cc cc cc 48 89 c8 48 c1 e9 03 83 e0 07 f3 48 a5 89 c1
RSP: 0018:ffffc9000356f958 EFLAGS: 00050206
RAX: ffff888012978001 RBX: 00000000205b1e80 RCX: 0000000000000e80
RDX: 0000000000000000 RSI: ffff888012978180 RDI: 00000000205b1000
RBP: ffffc9000356fad8 R08: ffff888012978fff R09: 1ffff1100252f1ff
R10: dffffc0000000000 R11: ffffed100252f200 R12: dffffc0000000000
R13: 1ffff920006adf40 R14: 0000000000001000 R15: ffff888012978000
copy_user_generic arch/x86/include/asm/uaccess_64.h:110 [inline]
raw_copy_to_user arch/x86/include/asm/uaccess_64.h:131 [inline]
copy_to_user_iter lib/iov_iter.c:25 [inline]
iterate_iovec include/linux/iov_iter.h:51 [inline]
iterate_and_advance2 include/linux/iov_iter.h:247 [inline]
iterate_and_advance include/linux/iov_iter.h:271 [inline]
_copy_to_iter+0x4c0/0x1960 lib/iov_iter.c:185
copy_page_to_iter+0xb1/0x160 lib/iov_iter.c:362
process_vm_rw_pages mm/process_vm_access.c:45 [inline]
process_vm_rw_single_vec mm/process_vm_access.c:118 [inline]
process_vm_rw_core mm/process_vm_access.c:216 [inline]
process_vm_rw+0x871/0xcf0 mm/process_vm_access.c:284
__do_sys_process_vm_readv mm/process_vm_access.c:296 [inline]
__se_sys_process_vm_readv mm/process_vm_access.c:292 [inline]
__x64_sys_process_vm_readv+0xe0/0x100 mm/process_vm_access.c:292
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: 0033:0x7f7195175b99
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:00007f7195eee048 EFLAGS: 00000246 ORIG_RAX: 0000000000000136
RAX: ffffffffffffffda RBX: 00007f7195304078 RCX: 00007f7195175b99
RDX: 0000000000000002 RSI: 0000000020008400 RDI: 000000000000003e
RBP: 00007f71951f677e R08: 0000000000000286 R09: 0000000000000000
R10: 0000000020008640 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7195304078 R15: 00007f719542fa68
The buggy address belongs to stack of task syz.1.2202/15673
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
[ffffc90003568000, ffffc90003571000) 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:0xffff88806ed93e58 pfn:0x6ed93
memcg:ffff88807eda4b82
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: ffff88806ed93e58 0000000000000000 00000001ffffffff ffff88807eda4b82
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 15670, tgid 15670 (syz.1.2202), ts 777318759784, free_ts 777016248113
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_clone3 kernel/fork.c:3098 [inline]
__se_sys_clone3+0x2cb/0x350 kernel/fork.c:3082
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 11421 tgid 11421 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
discard_slab mm/slub.c:2527 [inline]
__put_partials+0xeb/0x130 mm/slub.c:2995
put_cpu_partial+0x17c/0x250 mm/slub.c:3070
__slab_free+0x2ea/0x3d0 mm/slub.c:4308
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]
__do_kmalloc_node mm/slub.c:4122 [inline]
__kmalloc_noprof+0x1a3/0x400 mm/slub.c:4136
kmalloc_noprof include/linux/slab.h:664 [inline]
kzalloc_noprof include/linux/slab.h:778 [inline]
tomoyo_encode2 security/tomoyo/realpath.c:45 [inline]
tomoyo_encode+0x26f/0x540 security/tomoyo/realpath.c:80
tomoyo_path_perm+0x3ca/0x740 security/tomoyo/file.c:831
tomoyo_path_symlink+0xde/0x120 security/tomoyo/tomoyo.c:212
security_path_symlink+0xe3/0x140 security/security.c:1876
do_symlinkat+0x136/0x3a0 fs/namei.c:4513
__do_sys_symlink fs/namei.c:4536 [inline]
__se_sys_symlink fs/namei.c:4534 [inline]
__x64_sys_symlink+0x7e/0x90 fs/namei.c:4534
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
Memory state around the buggy address:
ffffc9000356ed80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000356ee00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000356ee80: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00
^
ffffc9000356ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000356ef80: f1 f1 f1 f1 00 f3 f3 f3 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