==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xd2/0x170 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc900036bf880 by task syz-executor162/5083
CPU: 1 PID: 5083 Comm: syz-executor162 Not tainted 6.9.0-rc6-syzkaller-00113-g49a73b1652c5 #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 ee 8f 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 8c da f5 65 8b 05 34 a8 78 74 85 c0 74 43 48 c7 04 24 0e 36
RSP: 0018:ffffc900036bf880 EFLAGS: 00000206
RAX: 7c801f6a8be4c700 RBX: 1ffff920006d7f14 RCX: ffffffff8172ffba
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: 0000000000000001
RBP: ffffc900036bf910 R08: ffffffff92f355cf R09: 1ffffffff25e6ab9
R10: dffffc0000000000 R11: fffffbfff25e6aba R12: dffffc0000000000
R13: 1ffff920006d7f10 R14: ffffc900036bf8a0 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
ida_alloc_range+0x821/0xa80 lib/idr.c:453
proc_alloc_inum fs/proc/generic.c:205 [inline]
proc_register+0x3f/0x4f0 fs/proc/generic.c:369
proc_create_data fs/proc/generic.c:577 [inline]
proc_create+0x230/0x2c0 fs/proc/generic.c:585
create_proc_profile+0xba/0x120 kernel/profile.c:442
profiling_store+0x81/0xc0 kernel/ksysfs.c:107
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: 0033:0x7fb250b7e379
Code: d8 5b 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffce2b0a3d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007ffce2b0a4f0 RCX: 00007fb250b7e379
RDX: 0000000000000015 RSI: 0000000020000280 RDI: 0000000000000003
RBP: 00007ffce2b0a4f0 R08: 00007ffce2b0a164 R09: 0000000000000000
R10: 0000000000000014 R11: 0000000000000246 R12: 00007ffce2b0a4f8
R13: 000000000000000c R14: 0000000000000003 R15: 0000000000000004
The buggy address belongs to stack of task syz-executor162/5083
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
[ffffc900036b8000, ffffc900036c1000) 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:0x786ea
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 5081, tgid 492802309 (sshd), ts 5081, free_ts 67844067814
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 5078 tgid 5078 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_folios+0x1f2/0xc10 mm/page_alloc.c:2536
folios_put_refs+0x93a/0xa60 mm/swap.c:1034
free_pages_and_swap_cache+0x5c8/0x690 mm/swap_state.c:332
__tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
tlb_flush_mmu_free mm/mmu_gather.c:366 [inline]
tlb_flush_mmu+0x3a3/0x680 mm/mmu_gather.c:373
tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:465
exit_mmap+0x4bb/0xd60 mm/mmap.c:3280
__mmput+0x115/0x3c0 kernel/fork.c:1346
exit_mm+0x220/0x310 kernel/exit.c:569
do_exit+0x99e/0x27e0 kernel/exit.c:865
do_group_exit+0x207/0x2c0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
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:
ffffc900036bf780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900036bf800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900036bf880: f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00 00 00 00 00
^
ffffc900036bf900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900036bf980: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 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 ee 8f 6f f6 call 0xf66f9002
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 8c da f5 call 0xf5da8d02 <-- trapping instruction
2f: 65 8b 05 34 a8 78 74 mov %gs:0x7478a834(%rip),%eax # 0x7478a86a
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