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Message-ID: <0000000000008023b805ff38a0af@google.com>
Date: Wed, 28 Jun 2023 16:05:59 -0700
From: syzbot <syzbot+f13a9546e229c1a6e378@...kaller.appspotmail.com>
To: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
reiserfs-devel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
tglx@...utronix.de
Subject: [syzbot] [reiserfs?] general protection fault in __hrtimer_run_queues (3)
Hello,
syzbot found the following issue on:
HEAD commit: e8f75c0270d9 Merge tag 'x86_sgx_for_v6.5' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13710670a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=a98ec7f738e43bd4
dashboard link: https://syzkaller.appspot.com/bug?extid=f13a9546e229c1a6e378
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1227af7b280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13803daf280000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f27c1d41217a/disk-e8f75c02.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/843ae5d5c810/vmlinux-e8f75c02.xz
kernel image: https://storage.googleapis.com/syzbot-assets/da48bc4c0ec1/bzImage-e8f75c02.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/667a76526623/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f13a9546e229c1a6e378@...kaller.appspotmail.com
==================================================================
BUG: KASAN: global-out-of-bounds in lookup_object lib/debugobjects.c:195 [inline]
BUG: KASAN: global-out-of-bounds in debug_object_deactivate lib/debugobjects.c:785 [inline]
BUG: KASAN: global-out-of-bounds in debug_object_deactivate+0x27b/0x300 lib/debugobjects.c:771
Read of size 8 at addr ffffffff8a49cd78 by task kauditd/27
CPU: 1 PID: 27 Comm: kauditd Not tainted 6.4.0-syzkaller-01406-ge8f75c0270d9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
print_report mm/kasan/report.c:462 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:572
lookup_object lib/debugobjects.c:195 [inline]
debug_object_deactivate lib/debugobjects.c:785 [inline]
debug_object_deactivate+0x27b/0x300 lib/debugobjects.c:771
debug_hrtimer_deactivate kernel/time/hrtimer.c:427 [inline]
debug_deactivate kernel/time/hrtimer.c:483 [inline]
__run_hrtimer kernel/time/hrtimer.c:1656 [inline]
__hrtimer_run_queues+0x3f3/0xbe0 kernel/time/hrtimer.c:1752
hrtimer_interrupt+0x320/0x7b0 kernel/time/hrtimer.c:1814
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1098 [inline]
__sysvec_apic_timer_interrupt+0x14a/0x430 arch/x86/kernel/apic/apic.c:1115
sysvec_apic_timer_interrupt+0x92/0xc0 arch/x86/kernel/apic/apic.c:1109
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:645
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:200
Code: 66 d4 8f 02 66 0f 1f 44 00 00 f3 0f 1e fa 48 8b be b0 01 00 00 e8 b0 ff ff ff 31 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 <f3> 0f 1e fa 65 8b 05 3d 3a 7f 7e 89 c1 48 8b 34 24 81 e1 00 01 00
RSP: 0018:ffffc90000a3faa8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000000000
RDX: ffff88801724bb80 RSI: ffffffff81686965 RDI: 0000000000000007
RBP: ffffffff8d26a498 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000200 R11: 205d373254202020 R12: 0000000000000000
R13: ffffffff8d26a440 R14: dffffc0000000000 R15: 0000000000000001
console_emit_next_record arch/x86/include/asm/irqflags.h:42 [inline]
console_flush_all+0x61b/0xcc0 kernel/printk/printk.c:2933
console_unlock+0xb8/0x1f0 kernel/printk/printk.c:3007
vprintk_emit+0x1bd/0x600 kernel/printk/printk.c:2307
vprintk+0x84/0xa0 kernel/printk/printk_safe.c:50
_printk+0xbf/0xf0 kernel/printk/printk.c:2328
kauditd_printk_skb kernel/audit.c:536 [inline]
kauditd_hold_skb+0x1fb/0x240 kernel/audit.c:571
kauditd_send_queue+0x220/0x280 kernel/audit.c:756
kauditd_thread+0x617/0xaa0 kernel/audit.c:880
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
The buggy address belongs to the variable:
ds.0+0x218/0x580
The buggy address belongs to the physical page:
page:ffffea0000292700 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa49c
flags: 0xfff00000001000(reserved|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000001000 ffffea0000292708 ffffea0000292708 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner info is not present (never set?)
Memory state around the buggy address:
ffffffff8a49cc00: f9 f9 f9 f9 00 00 00 00 03 f9 f9 f9 f9 f9 f9 f9
ffffffff8a49cc80: 07 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 00 05 f9 f9
>ffffffff8a49cd00: f9 f9 f9 f9 00 00 03 f9 f9 f9 f9 f9 00 00 01 f9
^
ffffffff8a49cd80: f9 f9 f9 f9 00 00 00 00 00 00 00 00 06 f9 f9 f9
ffffffff8a49ce00: f9 f9 f9 f9 00 00 00 03 f9 f9 f9 f9 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 66 d4 data16 (bad)
2: 8f 02 popq (%rdx)
4: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
a: f3 0f 1e fa endbr64
e: 48 8b be b0 01 00 00 mov 0x1b0(%rsi),%rdi
15: e8 b0 ff ff ff callq 0xffffffca
1a: 31 c0 xor %eax,%eax
1c: c3 retq
1d: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
24: 00 00 00 00
28: 66 90 xchg %ax,%ax
* 2a: f3 0f 1e fa endbr64 <-- trapping instruction
2e: 65 8b 05 3d 3a 7f 7e mov %gs:0x7e7f3a3d(%rip),%eax # 0x7e7f3a72
35: 89 c1 mov %eax,%ecx
37: 48 8b 34 24 mov (%rsp),%rsi
3b: 81 .byte 0x81
3c: e1 00 loope 0x3e
3e: 01 00 add %eax,(%rax)
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to change bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
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