==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc900001071a0 by task kworker/u4:1/11
CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.96-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_address_description mm/kasan/report.c:284 [inline]
print_report+0x15f/0x4f0 mm/kasan/report.c:395
kasan_report+0x136/0x160 mm/kasan/report.c:495
profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
profile_tick+0xee/0x170 kernel/profile.c:339
tick_sched_handle kernel/time/tick-sched.c:255 [inline]
tick_sched_timer+0x390/0x550 kernel/time/tick-sched.c:1501
__run_hrtimer kernel/time/hrtimer.c:1686 [inline]
__hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1750
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
__sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [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 c2 b8 4c f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 67 06 c9 f6 65 8b 05 08 13 6d 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc900001071a0 EFLAGS: 00000206
RAX: 3fbaf6e86be80700 RBX: 1ffff92000020e38 RCX: ffffffff816ad45a
RDX: dffffc0000000000 RSI: ffffffff8aec0240 RDI: 0000000000000001
RBP: ffffc90000107230 R08: dffffc0000000000 R09: fffffbfff2093861
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff92000020e34 R14: ffffc900001071c0 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
ref_tracker_alloc+0x2b5/0x470 lib/ref_tracker.c:96
__netdev_tracker_alloc include/linux/netdevice.h:4008 [inline]
netdev_hold include/linux/netdevice.h:4037 [inline]
dst_init+0xee/0x440 net/core/dst.c:52
dst_alloc+0x155/0x190 net/core/dst.c:92
ip6_dst_alloc net/ipv6/route.c:345 [inline]
ip6_rt_pcpu_alloc net/ipv6/route.c:1375 [inline]
rt6_make_pcpu_route net/ipv6/route.c:1424 [inline]
ip6_pol_route+0xbeb/0x14e0 net/ipv6/route.c:2261
pol_lookup_func include/net/ip6_fib.h:579 [inline]
fib6_rule_lookup+0x265/0x620 net/ipv6/fib6_rules.c:116
ip6_route_output_flags+0xe1/0x350 net/ipv6/route.c:2645
ip6_route_output include/net/ip6_route.h:98 [inline]
ip6_dst_lookup_tail+0x196/0x11f0 net/ipv6/ip6_output.c:1116
ip6_dst_lookup_flow+0xb5/0x170 net/ipv6/ip6_output.c:1246
send6+0x5b0/0xac0 drivers/net/wireguard/socket.c:139
wg_socket_send_skb_to_peer+0x111/0x1d0 drivers/net/wireguard/socket.c:178
wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:40 [inline]
wg_packet_handshake_send_worker+0x1d9/0x310 drivers/net/wireguard/send.c:51
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to stack of task kworker/u4:1/11
and is located at offset 0 in frame:
_raw_spin_unlock_irqrestore+0x0/0x130
This frame has 1 object:
[32, 40) 'flags.i.i.i.i'
The buggy address belongs to the virtual mapping at
[ffffc90000100000, ffffc90000109000) created by:
copy_process+0x637/0x4060 kernel/fork.c:2098
The buggy address belongs to the physical page:
page:ffffea0004ffb680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13feda
flags: 0x17ff00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 017ff00000000000 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 0x0(), pid 1, tgid 1 (swapper/0), ts 2514533560, free_ts 0
create_dummy_stack mm/page_owner.c:67 [inline]
register_early_stack+0x86/0xe0 mm/page_owner.c:83
init_page_owner+0x3a/0x7db mm/page_owner.c:93
invoke_init_callbacks mm/page_ext.c:126 [inline]
page_ext_init+0x727/0x782 mm/page_ext.c:518
kernel_init_freeable+0x450/0x60f init/main.c:1624
page_owner free stack trace missing
Memory state around the buggy address:
ffffc90000107080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90000107100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90000107180: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00
^
ffffc90000107200: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
ffffc90000107280: 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 c2 b8 4c f7 call 0xf74cb8d6
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 67 06 c9 f6 call 0xf6c90696 <-- trapping instruction
2f: 65 8b 05 08 13 6d 75 mov %gs:0x756d1308(%rip),%eax # 0x756d133e
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