From: syzbot <syzbot+1aa04f53a21b8994067f@syzkaller.appspotmail.com>
To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org,
daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com,
john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org,
martin.lau@linux.dev, sdf@fomichev.me, song@kernel.org,
syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev
Subject: [syzbot] [usb?] general protection fault in count_matching_names
Date: Fri, 31 Jan 2025 12:35:27 -0800 [thread overview]
Message-ID: <679d340f.050a0220.163cdc.000e.GAE@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 69e858e0b8b2 Merge tag 'uml-for-linus-6.14-rc1' of git://g..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1523f6b0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=d033b14aeef39158
dashboard link: https://syzkaller.appspot.com/bug?extid=1aa04f53a21b8994067f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1323f6b0580000
Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-69e858e0.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a53b888c1f3f/vmlinux-69e858e0.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6b5e17edafc0/bzImage-69e858e0.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/6e8041af9503/mount_1.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1aa04f53a21b8994067f@syzkaller.appspotmail.com
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000060: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000300-0x0000000000000307]
CPU: 0 UID: 0 PID: 6160 Comm: syz.3.224 Not tainted 6.13.0-syzkaller-09760-g69e858e0b8b2 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:strcmp+0x42/0xa0 lib/string.c:277
Code: 00 fc ff df 31 db 49 8d 3c 1c 48 89 f8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 29 41 0f b6 2c 1c 49 8d 3c 1e 48 89 f8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 20 41 3a 2c 1e 75 2a 48 ff c3 40 84 ed 75
RSP: 0018:ffffc900000077f8 EFLAGS: 00010006
RAX: 0000000000000060 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000300 RDI: 0000000000000300
RBP: 0000000000000026 R08: ffffffff942f696f R09: 1ffffffff285ed2d
R10: dffffc0000000000 R11: fffffbfff285ed2e R12: ffffffff8c608700
R13: ffffffff93cd6c88 R14: 0000000000000300 R15: dffffc0000000000
FS: 00007f97c077e6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e6ddd1000 CR3: 0000000058d3a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
count_matching_names+0xfa/0x1c0 kernel/locking/lockdep.c:877
register_lock_class+0x450/0x980 kernel/locking/lockdep.c:1342
__lock_acquire+0xf3/0x2100 kernel/locking/lockdep.c:5103
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
call_timer_fn+0xdd/0x650 kernel/time/timer.c:1786
expire_timers kernel/time/timer.c:1835 [inline]
__run_timers kernel/time/timer.c:2414 [inline]
__run_timer_base+0x695/0x8e0 kernel/time/timer.c:2426
run_timer_base kernel/time/timer.c:2435 [inline]
run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2445
handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xf7/0x220 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5855
Code: 2b 00 74 08 4c 89 f7 e8 8a 2b 8b 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25
RSP: 0018:ffffc9000ce9f040 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 1ffff920019d3e14 RCX: ffff8880347e0ae8
RDX: dffffc0000000000 RSI: ffffffff8c0ab8e0 RDI: ffffffff8c608060
RBP: ffffc9000ce9f190 R08: ffffffff942f6847 R09: 1ffffffff285ed08
R10: dffffc0000000000 R11: fffffbfff285ed09 R12: 1ffff920019d3e10
R13: dffffc0000000000 R14: ffffc9000ce9f0a0 R15: 0000000000000246
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock include/linux/rcupdate.h:849 [inline]
is_bpf_text_address+0x46/0x2a0 kernel/bpf/core.c:772
kernel_text_address+0xa7/0xe0 kernel/extable.c:125
__kernel_text_address+0xd/0x40 kernel/extable.c:79
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xfd/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x76/0x430 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_folios+0xe40/0x18b0 mm/page_alloc.c:2707
folios_put_refs+0x76c/0x860 mm/swap.c:994
folio_batch_release include/linux/pagevec.h:101 [inline]
shmem_undo_range+0x593/0x1820 mm/shmem.c:1112
shmem_truncate_range mm/shmem.c:1224 [inline]
shmem_evict_inode+0x29b/0xa80 mm/shmem.c:1352
evict+0x4e8/0x9a0 fs/inode.c:796
__dentry_kill+0x20d/0x630 fs/dcache.c:643
dput+0x19f/0x2b0 fs/dcache.c:885
__fput+0x60b/0x9f0 fs/file_table.c:458
__do_sys_close fs/open.c:1579 [inline]
__se_sys_close fs/open.c:1564 [inline]
__x64_sys_close+0x7f/0x110 fs/open.c:1564
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f97bf98ba0a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 43 91 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 a3 91 02 00 8b 44 24
RSP: 002b:00007f97c077de00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f97bf98ba0a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000005939
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f97c077def0 R14: 00007f97c077deb0 R15: 00007f97b6600000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strcmp+0x42/0xa0 lib/string.c:277
Code: 00 fc ff df 31 db 49 8d 3c 1c 48 89 f8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 29 41 0f b6 2c 1c 49 8d 3c 1e 48 89 f8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 75 20 41 3a 2c 1e 75 2a 48 ff c3 40 84 ed 75
RSP: 0018:ffffc900000077f8 EFLAGS: 00010006
RAX: 0000000000000060 RBX: 0000000000000000 RCX: dffffc0000000000
RDX: 0000000000000001 RSI: 0000000000000300 RDI: 0000000000000300
RBP: 0000000000000026 R08: ffffffff942f696f R09: 1ffffffff285ed2d
R10: dffffc0000000000 R11: fffffbfff285ed2e R12: ffffffff8c608700
R13: ffffffff93cd6c88 R14: 0000000000000300 R15: dffffc0000000000
FS: 00007f97c077e6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e6ddd1000 CR3: 0000000058d3a000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 3 bytes skipped:
0: df 31 fbstp (%rcx)
2: db 49 8d fisttpl -0x73(%rcx)
5: 3c 1c cmp $0x1c,%al
7: 48 89 f8 mov %rdi,%rax
a: 48 c1 e8 03 shr $0x3,%rax
e: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax
13: 84 c0 test %al,%al
15: 75 29 jne 0x40
17: 41 0f b6 2c 1c movzbl (%r12,%rbx,1),%ebp
1c: 49 8d 3c 1e lea (%r14,%rbx,1),%rdi
20: 48 89 f8 mov %rdi,%rax
23: 48 c1 e8 03 shr $0x3,%rax
* 27: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction
2c: 84 c0 test %al,%al
2e: 75 20 jne 0x50
30: 41 3a 2c 1e cmp (%r14,%rbx,1),%bpl
34: 75 2a jne 0x60
36: 48 ff c3 inc %rbx
39: 40 84 ed test %bpl,%bpl
3c: 75 .byte 0x75
---
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@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, 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 overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
reply other threads:[~2025-01-31 20:35 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=679d340f.050a0220.163cdc.000e.GAE@google.com \
--to=syzbot+1aa04f53a21b8994067f@syzkaller.appspotmail.com \
--cc=andrii@kernel.org \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=daniel@iogearbox.net \
--cc=eddyz87@gmail.com \
--cc=haoluo@google.com \
--cc=john.fastabend@gmail.com \
--cc=jolsa@kernel.org \
--cc=kpsingh@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-usb@vger.kernel.org \
--cc=martin.lau@linux.dev \
--cc=sdf@fomichev.me \
--cc=song@kernel.org \
--cc=syzkaller-bugs@googlegroups.com \
--cc=yonghong.song@linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.