warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow
==================================================================
BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x1aa1/0x22d0
Read of size 8 at addr ffff888044e8f900 by task syz-executor.7/4579
CPU: 1 PID: 4579 Comm: syz-executor.7 Not tainted 6.2.0-rc8-next-20230214 #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 1b 96
loop5: detected capacity change from 0 to 512
RSP: 0018:ffff888044e8f860 EFLAGS: 00000202
RAX: 0000000000000023 RBX: ffff888034fb4e90 RCX: 0000000000000003
RDX: 0000000000000004 RSI: ffffffff856cb300 RDI: ffffffff848f8480
RBP: ffffffff848f8480 R08: 0000000000000000 R09: 0000000000000001
R10: fffffbfff0ba4882 R11: 0000000000000001 R12: 0000000000000000
R13: 1ffff110089d1f15 R14: ffff888044e8f928 R15: ffffffff8550e1c0
asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire.part.0+0x10f/0x320
Code: b6 c9 e8 e4 86 ff ff b8 ff ff ff ff 48 83 c4 28 65 0f c1 05 f3 29 d5 7e 83 f8 01 0f 85 ab 01 00 00 48 85 ed 0f 85 9c 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7
RSP: 0018:ffff888044e8f920 EFLAGS: 00000206
RAX: 0000000000000001 RBX: ffffffff856cb300 RCX: 0000000000000001
RDX: 1ffff1100339a483 RSI: 0000000000000008 RDI: ffffffff87103598
RBP: 1ffff110089d1f15 R08: 0000000000000000 R09: ffffffff812b6390
R10: ffffffff851c2b50 R11: 0000000041b58ab3 R12: ffffffff856cb318
R13: 0000000000000000 R14: ffff888019cd1ac0 R15: ffffffff81ef09f8
fs_reclaim_acquire+0xda/0x170
The buggy address belongs to stack of task syz-executor.7/4579
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:000000001a243dea refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x44e8f
flags: 0x100000000000000(node=0|zone=1)
raw: 0100000000000000 0000000000000000 ffffea000113a3c8 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888044e8f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888044e8f880: 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 00 f3 f3
>ffff888044e8f900: f3 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
^
ffff888044e8f980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888044e8fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'.
loop5: detected capacity change from 0 to 512
9pnet_fd: Insufficient options for proto=fd
loop5: detected capacity change from 0 to 512
9pnet_fd: Insufficient options for proto=fd
----------------
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: 1b .byte 0x1b
3f: 96 xchg %eax,%esi