==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc900047cf8e0 by task kworker/u4:9/5830
CPU: 0 PID: 5830 Comm: kworker/u4:9 Not tainted 5.15.103-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: bat_events batadv_nc_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description+0x63/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:434 [inline]
kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
profile_tick+0xd4/0x130 kernel/profile.c:416
tick_sched_handle kernel/time/tick-sched.c:227 [inline]
tick_sched_timer+0x237/0x3c0 kernel/time/tick-sched.c:1420
__run_hrtimer kernel/time/hrtimer.c:1685 [inline]
__hrtimer_run_queues+0x5d9/0xeb0 kernel/time/hrtimer.c:1749
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
__sysvec_apic_timer_interrupt+0x17b/0x570 arch/x86/kernel/apic/apic.c:1103
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1097
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:161 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xd4/0x130 kernel/locking/spinlock.c:194
Code: 9c 8f 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 52 d3 9d f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 37 44 2b f7 65 8b 05 b8 40 d6 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc900047cf8e0 EFLAGS: 00000206
RAX: b72bd0dfbeda1200 RBX: 1ffff920008f9f20 RCX: ffffffff81633238
RDX: dffffc0000000000 RSI: ffffffff8a8afc80 RDI: 0000000000000001
RBP: ffffc900047cf970 R08: dffffc0000000000 R09: fffffbfff1f76631
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff920008f9f1c R14: ffffc900047cf900 R15: 0000000000000246
rcu_preempt_deferred_qs_irqrestore+0x879/0xc50
rcu_read_unlock_special+0x43f/0x520 kernel/rcu/tree_plugin.h:670
__rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422
rcu_read_unlock include/linux/rcupdate.h:728 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:416 [inline]
batadv_nc_worker+0x234/0x5b0 net/batman-adv/network-coding.c:723
process_one_work+0x90d/0x1270 kernel/workqueue.c:2306
worker_thread+0xaca/0x1280 kernel/workqueue.c:2453
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
addr ffffc900047cf8e0 is located in stack of task kworker/u4:9/5830 at offset 0 in frame:
_raw_spin_unlock_irqrestore+0x0/0x130 kernel/locking/spinlock.c:187
this frame has 1 object:
[32, 40) 'flags.i.i.i.i'
Memory state around the buggy address:
ffffc900047cf780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900047cf800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900047cf880: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
^
ffffc900047cf900: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
ffffc900047cf980: 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 52 d3 9d f7 callq 0xf79dd366
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 37 44 2b f7 callq 0xf72b4466 <-- trapping instruction
2f: 65 8b 05 b8 40 d6 75 mov %gs:0x75d640b8(%rip),%eax # 0x75d640ee
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