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Date: Fri, 08 Sep 2023 01:46:57 -0700
From: syzbot <syzbot+bbc59256015533127d80@...kaller.appspotmail.com>
To: andriy.shevchenko@...ux.intel.com, gregkh@...uxfoundation.org,
linux-kernel@...r.kernel.org, rafael@...nel.org,
syzkaller-bugs@...glegroups.com
Subject: [syzbot] [kernel?] general protection fault in serio_handle_event
Hello,
syzbot found the following issue on:
HEAD commit: db906f0ca6bb Merge tag 'phy-for-6.6' of git://git.kernel.o..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=11f66447a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=3bd57a1ac08277b0
dashboard link: https://syzkaller.appspot.com/bug?extid=bbc59256015533127d80
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=138b9848680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1537ea00680000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3c57e6e58eb2/disk-db906f0c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f999d9f3cd94/vmlinux-db906f0c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9d9c5e553ff2/bzImage-db906f0c.xz
The issue was bisected to:
commit d21fdd07cea418c0d98c8a15fc95b8b8970801e7
Author: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Date: Thu Aug 17 09:12:21 2023 +0000
driver core: Return proper error code when dev_set_name() fails
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=122032f0680000
final oops: https://syzkaller.appspot.com/x/report.txt?x=112032f0680000
console output: https://syzkaller.appspot.com/x/log.txt?x=162032f0680000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+bbc59256015533127d80@...kaller.appspotmail.com
Fixes: d21fdd07cea4 ("driver core: Return proper error code when dev_set_name() fails")
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 774 Comm: kworker/0:2 Not tainted 6.5.0-syzkaller-11275-gdb906f0ca6bb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: events_long serio_handle_event
RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329
Code: 01 ae f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89
RSP: 0018:ffffc90003ccfa58 EFLAGS: 00010282
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000
RBP: ffffc90003ccfae8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003ccfae8
R13: 0000000000000cc0 R14: 0000000000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7335610882 CR3: 000000006e989000 CR4: 0000000000350ef0
Call Trace:
<TASK>
kvasprintf_const+0x25/0x190 lib/kasprintf.c:45
kobject_set_name_vargs+0x5a/0x130 lib/kobject.c:272
kobject_add_varg lib/kobject.c:366 [inline]
kobject_add+0x12a/0x240 lib/kobject.c:424
device_add+0x290/0x1ac0 drivers/base/core.c:3560
serio_add_port drivers/input/serio/serio.c:539 [inline]
serio_handle_event+0x63b/0xa90 drivers/input/serio/serio.c:207
process_one_work+0x887/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strchr+0x1b/0xb0 lib/string.c:329
Code: 01 ae f7 48 8b 74 24 08 48 8b 14 24 eb 89 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 48 89 fa 55 48 c1 ea 03 53 48 83 ec 10 <0f> b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 51 0f b6 07 89
RSP: 0018:ffffc90003ccfa58 EFLAGS: 00010282
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000025 RDI: 0000000000000000
RBP: ffffc90003ccfae8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90003ccfae8
R13: 0000000000000cc0 R14: 0000000000000000 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f733558f000 CR3: 0000000078402000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: 01 ae f7 48 8b 74 add %ebp,0x748b48f7(%rsi)
6: 24 08 and $0x8,%al
8: 48 8b 14 24 mov (%rsp),%rdx
c: eb 89 jmp 0xffffff97
e: 90 nop
f: f3 0f 1e fa endbr64
13: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
1a: fc ff df
1d: 48 89 fa mov %rdi,%rdx
20: 55 push %rbp
21: 48 c1 ea 03 shr $0x3,%rdx
25: 53 push %rbx
26: 48 83 ec 10 sub $0x10,%rsp
* 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction
2e: 48 89 fa mov %rdi,%rdx
31: 83 e2 07 and $0x7,%edx
34: 38 d0 cmp %dl,%al
36: 7f 04 jg 0x3c
38: 84 c0 test %al,%al
3a: 75 51 jne 0x8d
3c: 0f b6 07 movzbl (%rdi),%eax
3f: 89 .byte 0x89
---
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.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
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 overwrite 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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