==================================================================
BUG: KASAN: stack-out-of-bounds in profile_pc+0xa4/0xe0 arch/x86/kernel/time.c:42
Read of size 8 at addr ffffc900033776a0 by task dhcpcd/3175
CPU: 0 PID: 3175 Comm: dhcpcd Not tainted 5.15.161-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 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:255 [inline]
tick_sched_timer+0x390/0x550 kernel/time/tick-sched.c:1473
__run_hrtimer kernel/time/hrtimer.c:1686 [inline]
__hrtimer_run_queues+0x55b/0xcf0 kernel/time/hrtimer.c:1750
hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1085 [inline]
__sysvec_apic_timer_interrupt+0x139/0x470 arch/x86/kernel/apic/apic.c:1102
sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1096
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 62 6c a2 f7 f6 44 24 21 02 75 4e 41 f7 c7 00 02 00 00 74 01 fb bf 01 00 00 00 57 ac 2f f7 65 8b 05 d8 b2 da 75 85 c0 74 3f 48 c7 04 24 0e 36
RSP: 0018:ffffc900033776a0 EFLAGS: 00000206
RAX: 20cb37aa66d9a700 RBX: 1ffff9200066eed8 RCX: ffffffff913f0f03
RDX: dffffc0000000000 RSI: ffffffff8a8b2a00 RDI: 0000000000000001
RBP: ffffc90003377730 R08: ffffffff8186db40 R09: ffffed10037f5b49
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 1ffff9200066eed4 R14: ffffc900033776c0 R15: 0000000000000246
spin_unlock_irqrestore include/linux/spinlock.h:418 [inline]
__wake_up_common_lock kernel/sched/wait.c:140 [inline]
__wake_up_sync_key+0x121/0x1c0 kernel/sched/wait.c:205
sock_def_readable+0x135/0x240 net/core/sock.c:3092
unix_dgram_sendmsg+0x15fc/0x2090 net/unix/af_unix.c:1947
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
sock_write_iter+0x39b/0x530 net/socket.c:1079
do_iter_readv_writev+0x594/0x7a0
do_iter_write+0x1ea/0x760 fs/read_write.c:855
vfs_writev fs/read_write.c:928 [inline]
do_writev+0x281/0x470 fs/read_write.c:971
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f60ad87ee03
Code: 89 c7 48 89 44 24 08 e8 6a f2 f9 ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6d 48 8b 15 f6 5f 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff4e4cbc38 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fff4e4dc1f8 RCX: 00007f60ad87ee03
RDX: 0000000000000005 RSI: 00007fff4e4cbc50 RDI: 000000000000000a
RBP: 00007fff4e4dc1f8 R08: 000000000000000a R09: 00007fff4e4cbc90
R10: 00007fff4e4cbc98 R11: 0000000000000246 R12: 00007fff4e4cbdd8
R13: 0000000000000040 R14: 00007fff4e4cbf18 R15: 0000564be79e6010
addr ffffc900033776a0 is located in stack of task dhcpcd/3175 at offset 0 in frame:
_raw_spin_unlock_irqrestore+0x0/0x130
this frame has 1 object:
[32, 40) 'flags.i.i.i.i'
Memory state around the buggy address:
ffffc90003377580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90003377600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90003377680: 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 00 00 00 00
^
ffffc90003377700: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
ffffc90003377780: 00 00 00 00 00 f3 f3 f3 f3 f3 f3 f3 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 62 6c a2 f7 call 0xf7a26c76
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 57 ac 2f f7 call 0xf72fac86 <-- trapping instruction
2f: 65 8b 05 d8 b2 da 75 mov %gs:0x75dab2d8(%rip),%eax # 0x75dab30e
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