loop0: detected capacity change from 0 to 40
loop1: detected capacity change from 0 to 40
==================================================================
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x1aa1/0x22d0
Read of size 8 at addr ffff888039427c00 by task syz-executor.5/5999
CPU: 1 PID: 5999 Comm: syz-executor.5 Not tainted 6.2.0-rc7-next-20230213 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
dump_stack_lvl+0x91/0xf0
print_report+0xcc/0x620
kasan_report+0xc0/0xf0
unwind_next_frame+0x1aa1/0x22d0
arch_stack_walk+0x87/0xf0
stack_trace_save+0x90/0xd0
kasan_save_stack+0x22/0x50
kasan_set_track+0x25/0x30
kasan_save_free_info+0x2e/0x50
__kasan_slab_free+0x10a/0x190
kmem_cache_free+0xff/0x510
rcu_core+0x822/0x1d40
__do_softirq+0x258/0x8a2
__irq_exit_rcu+0xcc/0x110
irq_exit_rcu+0x9/0x20
sysvec_apic_timer_interrupt+0x6e/0x90
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:strlen+0x6d/0xa0
Code: 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a 38 ca 7f 04 84 d2 75 27 80 38 00 75 de 48 83 c4 08 48 29 e8 5b <5d> e9 91 b8 05 00 48 83 c4 08 31 c0 5b 5d e9 84 b8 05 00 e8 3b b9
RSP: 0018:ffff888039427b60 EFLAGS: 00000202
RAX: 0000000000000004 RBX: ffff888037803610 RCX: 0000000000000004
RDX: 0000000000000005 RSI: ffff88806cf35700 RDI: ffffffff848e99e0
RBP: ffffffff848e99e0 R08: 0000000000000000 R09: 0000000000000001
R10: fffffbfff0ba2b9a R11: 0000000000000001 R12: 0000000000000000
R13: 1ffff11007284f75 R14: ffff888039427c28 R15: ffffffff8550d7e0
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0003:find_held_lock+0x2c/0x110
RSP: 8165f0e6:ffff88806cf35000 EFLAGS: 1ffff11007284f89 ORIG_RAX: 0000000000000002
RAX: 0000000000000001 RBX: ffff88806cf35700 RCX: 0000000000000001
RDX: 0000000000000001 RSI: ffffffff8446b09f RDI: 0000000000000246
RBP: 1ffff11007284f75 R08: 0000000000000000 R09: ffffffff812b6390
R10: ffffffff851c2450 R11: 0000000041b58ab3 R12: ffff88806cf35718
R13: 0000000000000000 R14: 0007ffffffffffff R15: ffffea0000fbee00
The buggy address belongs to stack of task syz-executor.5/5999
and is located at offset 88 in frame:
perf_trace_lock_acquire+0x0/0x500
This frame has 2 objects:
[48, 52) 'rctx'
[64, 72) '__regs'
The buggy address belongs to the physical page:
page:000000005e8d2df3 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x39427
flags: 0x100000000000000(node=0|zone=1)
raw: 0100000000000000 0000000000000000 ffffea0000e509c8 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888039427b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888039427b80: 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 00 f3 f3
>ffff888039427c00: f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
^
ffff888039427c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888039427d00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
==================================================================
loop4: detected capacity change from 0 to 40
loop0: detected capacity change from 0 to 40
loop1: detected capacity change from 0 to 40
loop1: detected capacity change from 0 to 40
loop1: detected capacity change from 0 to 40
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
random: crng reseeded on system resumption
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
random: crng reseeded on system resumption
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
random: crng reseeded on system resumption
random: crng reseeded on system resumption
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
random: crng reseeded on system resumption
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun entered promiscuous mode
device syz_tun left promiscuous mode
device syz_tun left promiscuous mode
----------------
Code disassembly (best guess):
0: 48 83 c0 01 add $0x1,%rax
4: 48 89 c2 mov %rax,%rdx
7: 48 89 c1 mov %rax,%rcx
a: 48 c1 ea 03 shr $0x3,%rdx
e: 83 e1 07 and $0x7,%ecx
11: 0f b6 14 1a movzbl (%rdx,%rbx,1),%edx
15: 38 ca cmp %cl,%dl
17: 7f 04 jg 0x1d
19: 84 d2 test %dl,%dl
1b: 75 27 jne 0x44
1d: 80 38 00 cmpb $0x0,(%rax)
20: 75 de jne 0x0
22: 48 83 c4 08 add $0x8,%rsp
26: 48 29 e8 sub %rbp,%rax
29: 5b pop %rbx
* 2a: 5d pop %rbp <-- trapping instruction
2b: e9 91 b8 05 00 jmpq 0x5b8c1
30: 48 83 c4 08 add $0x8,%rsp
34: 31 c0 xor %eax,%eax
36: 5b pop %rbx
37: 5d pop %rbp
38: e9 84 b8 05 00 jmpq 0x5b8c1
3d: e8 .byte 0xe8
3e: 3b .byte 0x3b
3f: b9 .byte 0xb9