==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xa8/0xe0 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc900056ff100 by task syz-executor.0/5391
CPU: 0 PID: 5391 Comm: syz-executor.0 Not tainted 6.4.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:351 [inline]
print_report+0x163/0x540 mm/kasan/report.c:462
kasan_report+0x176/0x1b0 mm/kasan/report.c:572
profile_pc+0xa8/0xe0 arch/x86/kernel/time.c:42
profile_tick+0xd8/0x130 kernel/profile.c:339
tick_sched_handle kernel/time/tick-sched.c:244 [inline]
tick_sched_timer+0x383/0x550 kernel/time/tick-sched.c:1481
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x562/0xd10 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x396/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x13f/0x480 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
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 2e 12 31 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 d3 3f ad f6 65 8b 05 64 26 53 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc900056ff100 EFLAGS: 00000206
RAX: 10ae7791e2ffe700 RBX: 1ffff92000adfe24 RCX: ffffffff816a4dea
RDX: dffffc0000000000 RSI: ffffffff8aea5f00 RDI: 0000000000000001
RBP: ffffc900056ff190 R08: dffffc0000000000 R09: fffffbfff205fe19
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000adfe20 R14: ffffc900056ff120 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:405 [inline]
rmqueue_bulk mm/page_alloc.c:2351 [inline]
__rmqueue_pcplist+0x1e3e/0x2150 mm/page_alloc.c:2958
rmqueue_pcplist mm/page_alloc.c:3000 [inline]
rmqueue mm/page_alloc.c:3043 [inline]
get_page_from_freelist+0x791/0x33a0 mm/page_alloc.c:3499
__alloc_pages+0x255/0x670 mm/page_alloc.c:4768
__get_free_pages+0xc/0x30 mm/page_alloc.c:4818
kasan_populate_vmalloc_pte+0x2e/0xd0 mm/kasan/shadow.c:323
apply_to_pte_range mm/memory.c:2584 [inline]
apply_to_pmd_range mm/memory.c:2628 [inline]
apply_to_pud_range mm/memory.c:2664 [inline]
apply_to_p4d_range mm/memory.c:2700 [inline]
__apply_to_page_range+0x9c5/0xcc0 mm/memory.c:2734
alloc_vmap_area+0x1acb/0x1c00 mm/vmalloc.c:1642
__get_vm_area_node+0x16e/0x370 mm/vmalloc.c:2551
__vmalloc_node_range+0x3e5/0x14e0 mm/vmalloc.c:3217
__vmalloc_node mm/vmalloc.c:3322 [inline]
vzalloc+0x79/0x90 mm/vmalloc.c:3395
profile_init+0xee/0x130 kernel/profile.c:131
profiling_store+0x5e/0xc0 kernel/ksysfs.c:104
kernfs_fop_write_iter+0x3a6/0x4f0 fs/kernfs/file.c:334
call_write_iter include/linux/fs.h:1868 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x790/0xb20 fs/read_write.c:584
ksys_write+0x1a0/0x2c0 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fae9d88c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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:00007fae9e6c0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fae9d9abf80 RCX: 00007fae9d88c0f9
RDX: 0000000000000012 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007fae9d8e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcca481b8f R14: 00007fae9e6c0300 R15: 0000000000022000
The buggy address belongs to stack of task syz-executor.0/5391
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
[ffffc900056f8000, ffffc90005701000) created by:
copy_process+0x5c8/0x42f0 kernel/fork.c:2333
The buggy address belongs to the physical page:
page:ffffea00007e7140 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1f9c5
memcg:ffff888029f5c882
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888029f5c882
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 5347, tgid 5347 (dhcpcd-run-hook), ts 76215808025, free_ts 76214274562
prep_new_page mm/page_alloc.c:1738 [inline]
get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3502
__alloc_pages+0x255/0x670 mm/page_alloc.c:4768
vm_area_alloc_pages mm/vmalloc.c:3009 [inline]
__vmalloc_area_node mm/vmalloc.c:3085 [inline]
__vmalloc_node_range+0x9ab/0x14e0 mm/vmalloc.c:3257
alloc_thread_stack_node kernel/fork.c:313 [inline]
dup_task_struct+0x3e5/0x7d0 kernel/fork.c:1116
copy_process+0x5c8/0x42f0 kernel/fork.c:2333
kernel_clone+0x222/0x800 kernel/fork.c:2918
__do_sys_clone kernel/fork.c:3061 [inline]
__se_sys_clone kernel/fork.c:3045 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:3045
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1302 [inline]
free_unref_page_prepare+0x8fe/0xa10 mm/page_alloc.c:2564
free_unref_page_list+0x596/0x830 mm/page_alloc.c:2705
release_pages+0x2193/0x2470 mm/swap.c:1042
tlb_batch_pages_flush mm/mmu_gather.c:97 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:292 [inline]
tlb_flush_mmu+0x100/0x210 mm/mmu_gather.c:299
tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:391
exit_mmap+0x3da/0xaf0 mm/mmap.c:3123
__mmput+0x115/0x3c0 kernel/fork.c:1351
exit_mm+0x227/0x310 kernel/exit.c:564
do_exit+0x612/0x2290 kernel/exit.c:858
do_group_exit+0x206/0x2c0 kernel/exit.c:1021
__do_sys_exit_group kernel/exit.c:1032 [inline]
__se_sys_exit_group kernel/exit.c:1030 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1030
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Memory state around the buggy address:
ffffc900056ff000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900056ff080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900056ff100: f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00 00 00 00 00
^
ffffc900056ff180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900056ff200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 9c pushfq
1: 8f 44 24 20 popq 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 2e 12 31 f7 callq 0xf7311242
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 d3 3f ad f6 callq 0xf6ad4002 <-- trapping instruction
2f: 65 8b 05 64 26 53 75 mov %gs:0x75532664(%rip),%eax # 0x7553269a
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