==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44
Read of size 8 at addr ffffc9000340fba0 by task syz-executor393/5184
CPU: 0 PID: 5184 Comm: syz-executor393 Not tainted 6.9.0-rc5-syzkaller-00296-g5eb4573ea63d #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
print_address_description mm/kasan/report.c:377 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:488
kasan_report+0xd9/0x110 mm/kasan/report.c:601
profile_pc+0x186/0x1a0 arch/x86/kernel/time.c:44
profile_tick+0xd3/0x140 kernel/profile.c:339
tick_sched_handle kernel/time/tick-sched.c:277 [inline]
tick_nohz_handler+0x380/0x530 kernel/time/tick-sched.c:297
__run_hrtimer kernel/time/hrtimer.c:1692 [inline]
__hrtimer_run_queues+0x657/0xcc0 kernel/time/hrtimer.c:1756
hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1818
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
__sysvec_apic_timer_interrupt+0x10f/0x450 arch/x86/kernel/apic/apic.c:1049
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1043
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:queued_read_lock_slowpath+0x135/0x2b1 kernel/locking/qrwlock.c:51
Code: 00 8b 03 84 c0 74 36 48 b8 00 00 00 00 00 fc ff df 49 89 de 48 89 dd 49 c1 ee 03 83 e5 07 49 01 c6 83 c5 03 f3 90 41 0f b6 06 <40> 38 c5 7c 08 84 c0 0f 85 1f 01 00 00 8b 03 84 c0 75 e7 48 c7 c0
RSP: 0018:ffffc9000340fb98 EFLAGS: 00000286
RAX: 0000000000000000 RBX: ffffffff8d40a080 RCX: ffffffff8adf460b
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff8d40a080
RBP: 0000000000000003 R08: 0000000000000001 R09: fffffbfff1a81410
R10: ffffffff8d40a083 R11: 0000000000000000 R12: 1ffff92000681f74
R13: ffffffff8d40a084 R14: fffffbfff1a81410 R15: ffffffff8151cdb9
__do_wait+0x105/0x890 kernel/exit.c:1587
do_wait+0x219/0x570 kernel/exit.c:1631
kernel_wait4+0x16c/0x280 kernel/exit.c:1790
__do_sys_wait4+0x15f/0x170 kernel/exit.c:1818
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f161a1f07f3
Code: fe ff e9 41 ff ff ff 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 80 3d 71 a8 07 00 00 49 89 ca 74 14 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5d c3 0f 1f 40 00 48 83 ec 28 89 54 24 14 48
RSP: 002b:00007fffdbddb318 EFLAGS: 00000202 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 0000000000005f33 RCX: 00007f161a1f07f3
RDX: 0000000040000001 RSI: 00007fffdbddb32c RDI: 00000000ffffffff
RBP: 00000000000f4240 R08: 0000000000000042 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000000102b5
R13: 00007fffdbddb32c R14: 00007fffdbddb340 R15: 00007fffdbddb330
</TASK>
The buggy address belongs to stack of task syz-executor393/5184
and is located at offset 0 in frame:
queued_read_lock_slowpath+0x0/0x2b1 arch/x86/include/asm/paravirt.h:584
This frame has 1 object:
[32, 36) 'val'
The buggy address belongs to the virtual mapping at
[ffffc90003408000, ffffc90003411000) created by:
kernel_clone+0xfd/0x980 kernel/fork.c:2797
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27677
flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff)
page_type: 0xffffffff()
raw: 00fff80000000000 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 5179, tgid 1424133170 (syz-executor393), ts 5179, free_ts 43431676692
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534
prep_new_page mm/page_alloc.c:1541 [inline]
get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317
__alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575
alloc_pages_mpol+0x275/0x610 mm/mempolicy.c:2264
vm_area_alloc_pages mm/vmalloc.c:3561 [inline]
__vmalloc_area_node mm/vmalloc.c:3637 [inline]
__vmalloc_node_range+0xa26/0x14b0 mm/vmalloc.c:3818
alloc_thread_stack_node kernel/fork.c:309 [inline]
dup_task_struct kernel/fork.c:1115 [inline]
copy_process+0xe56/0x9090 kernel/fork.c:2220
kernel_clone+0xfd/0x980 kernel/fork.c:2797
__do_sys_clone+0xba/0x100 kernel/fork.c:2940
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5142 tgid 5142 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+0x527/0xb10 mm/page_alloc.c:2347
free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487
__folio_put_small mm/swap.c:119 [inline]
__folio_put+0x166/0x290 mm/swap.c:142
folio_put include/linux/mm.h:1508 [inline]
free_page_and_swap_cache+0x1eb/0x250 mm/swap_state.c:305
__tlb_remove_table arch/x86/include/asm/tlb.h:34 [inline]
__tlb_remove_table_free mm/mmu_gather.c:227 [inline]
tlb_remove_table_rcu+0x89/0xe0 mm/mmu_gather.c:282
rcu_do_batch kernel/rcu/tree.c:2196 [inline]
rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2471
__do_softirq+0x218/0x922 kernel/softirq.c:554
Memory state around the buggy address:
ffffc9000340fa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000340fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000340fb80: 00 00 00 00 f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00
^
ffffc9000340fc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc9000340fc80: 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 00 8b 03 84 c0 74 add %cl,0x74c08403(%rbx)
6: 36 48 b8 00 00 00 00 ss movabs $0xdffffc0000000000,%rax
d: 00 fc ff df
11: 49 89 de mov %rbx,%r14
14: 48 89 dd mov %rbx,%rbp
17: 49 c1 ee 03 shr $0x3,%r14
1b: 83 e5 07 and $0x7,%ebp
1e: 49 01 c6 add %rax,%r14
21: 83 c5 03 add $0x3,%ebp
24: f3 90 pause
26: 41 0f b6 06 movzbl (%r14),%eax
* 2a: 40 38 c5 cmp %al,%bpl <-- trapping instruction
2d: 7c 08 jl 0x37
2f: 84 c0 test %al,%al
31: 0f 85 1f 01 00 00 jne 0x156
37: 8b 03 mov (%rbx),%eax
39: 84 c0 test %al,%al
3b: 75 e7 jne 0x24
3d: 48 rex.W
3e: c7 .byte 0xc7
3f: c0 .byte 0xc0