==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xd2/0x170 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc90002e1ef20 by task syz-executor296/5091
CPU: 1 PID: 5091 Comm: syz-executor296 Not tainted 6.9.0-rc7-syzkaller-00012-gdccb07f2914c #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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:1692 [inline]
__hrtimer_run_queues+0x55b/0xd50 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+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 de b8 6f f6 f6 44 24 21 02 75 52 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 d3 b4 da f5 65 8b 05 74 d8 78 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc90002e1ef20 EFLAGS: 00000206
RAX: 2d29de2c57b4c900 RBX: 1ffff920005c3de8 RCX: ffffffff8172f77a
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001
RBP: ffffc90002e1efb0 R08: ffffffff92f35507 R09: 1ffffffff25e6aa0
R10: dffffc0000000000 R11: fffffbfff25e6aa1 R12: dffffc0000000000
R13: 1ffff920005c3de4 R14: ffffc90002e1ef40 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
rmqueue_bulk mm/page_alloc.c:2155 [inline]
__rmqueue_pcplist+0x216d/0x2620 mm/page_alloc.c:2826
rmqueue_pcplist mm/page_alloc.c:2868 [inline]
rmqueue mm/page_alloc.c:2905 [inline]
get_page_from_freelist+0x856/0x35b0 mm/page_alloc.c:3314
__alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
alloc_pages_mpol+0x3e8/0x680 mm/mempolicy.c:2264
__get_free_pages+0xc/0x30 mm/page_alloc.c:4622
kasan_populate_vmalloc_pte+0x38/0xe0 mm/kasan/shadow.c:304
apply_to_pte_range mm/memory.c:2744 [inline]
apply_to_pmd_range mm/memory.c:2788 [inline]
apply_to_pud_range mm/memory.c:2824 [inline]
apply_to_p4d_range mm/memory.c:2860 [inline]
__apply_to_page_range+0x8ec/0xe40 mm/memory.c:2894
alloc_vmap_area+0x1c35/0x22c0 mm/vmalloc.c:2010
__get_vm_area_node+0x16e/0x3c0 mm/vmalloc.c:3093
__vmalloc_node_range+0x3df/0x1490 mm/vmalloc.c:3778
__vmalloc_node mm/vmalloc.c:3883 [inline]
vzalloc+0x79/0x90 mm/vmalloc.c:3956
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
call_write_iter include/linux/fs.h:2110 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa84/0xcb0 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+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa70dbe4669
Code: 48 83 c4 28 c3 e8 17 1a 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffed68db388 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffed68db530 RCX: 00007fa70dbe4669
RDX: 0000000000000015 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007fa70dc261e7 R08: 00007ffed68db127 R09: 00007fa70dc261e7
R10: 0000000000000014 R11: 0000000000000246 R12: 00007ffed68db530
R13: 00007fa70dc26200 R14: 0000000000000001 R15: 0000000000000001
The buggy address belongs to stack of task syz-executor296/5091
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
[ffffc90002e18000, ffffc90002e21000) created by:
copy_process+0x5d1/0x3df0 kernel/fork.c:2220
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2f3c6
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 4945, tgid 2004897411 (dhcpcd-run-hook), ts 4945, free_ts 57549498435
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317
__alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575
alloc_pages_mpol+0x3e8/0x680 mm/mempolicy.c:2264
vm_area_alloc_pages mm/vmalloc.c:3561 [inline]
__vmalloc_area_node mm/vmalloc.c:3637 [inline]
__vmalloc_node_range+0x9a4/0x1490 mm/vmalloc.c:3818
alloc_thread_stack_node kernel/fork.c:309 [inline]
dup_task_struct+0x3e9/0x7d0 kernel/fork.c:1115
copy_process+0x5d1/0x3df0 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+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 4943 tgid 4943 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x986/0xab0 mm/page_alloc.c:2347
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487
__folio_put_small mm/swap.c:119 [inline]
__folio_put+0x22b/0x390 mm/swap.c:142
pipe_buf_release include/linux/pipe_fs_i.h:219 [inline]
pipe_update_tail fs/pipe.c:224 [inline]
pipe_read+0x6f2/0x13e0 fs/pipe.c:344
call_read_iter include/linux/fs.h:2104 [inline]
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0x97b/0xb70 fs/read_write.c:476
ksys_read+0x1a0/0x2c0 fs/read_write.c:619
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffffc90002e1ee00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90002e1ee80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90002e1ef00: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00
^
ffffc90002e1ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90002e1f000: 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 de b8 6f f6 call 0xf66fb8f2
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 b4 da f5 call 0xf5dab502 <-- trapping instruction
2f: 65 8b 05 74 d8 78 74 mov %gs:0x7478d874(%rip),%eax # 0x7478d8aa
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