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Message-ID: <0000000000000cede205dbf052bc@google.com>
Date: Tue, 05 Apr 2022 16:08:18 -0700
From: syzbot <syzbot+17404da5afdf21e8d612@...kaller.appspotmail.com>
To: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: [syzbot] general protection fault in simple_recursive_removal (2)
Hello,
syzbot found the following issue on:
HEAD commit: ce4c854ee868 Merge tag 'for-5.18-rc1-tag' of git://git.ker..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15339f9b700000
kernel config: https://syzkaller.appspot.com/x/.config?x=595bcd2109a73f9c
dashboard link: https://syzkaller.appspot.com/bug?extid=17404da5afdf21e8d612
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=16e820b0f00000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+17404da5afdf21e8d612@...kaller.appspotmail.com
sd 1:0:0:1: [sdb] Test Unit Ready failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
general protection fault, probably for non-canonical address 0xdffffc000000002a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000150-0x0000000000000157]
CPU: 1 PID: 3660 Comm: udevd Not tainted 5.18.0-rc1-syzkaller-00009-gce4c854ee868 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0xd85/0x56c0 kernel/locking/lockdep.c:4899
Code: 1a 0e 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 21 8d 1a 0e e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 15 31 00 00 48 81 3b 20 d4 22 8f 0f 84 4f f3 ff
RSP: 0018:ffffc90003e7f9f0 EFLAGS: 00010012
RAX: dffffc0000000000 RBX: 0000000000000150 RCX: 0000000000000000
RDX: 000000000000002a RSI: 0000000000000000 RDI: 0000000000000150
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88801b90d700 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f9eb648e840(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdb4657128 CR3: 0000000075f97000 CR4: 0000000000350ee0
Call Trace:
<TASK>
lock_acquire kernel/locking/lockdep.c:5641 [inline]
lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5606
down_write+0x90/0x150 kernel/locking/rwsem.c:1514
inode_lock include/linux/fs.h:748 [inline]
simple_recursive_removal+0x171/0x830 fs/libfs.c:276
debugfs_remove fs/debugfs/inode.c:742 [inline]
debugfs_remove+0x59/0x80 fs/debugfs/inode.c:736
blk_mq_debugfs_unregister_queue_rqos+0x34/0x70 block/blk-mq-debugfs.c:840
rq_qos_exit+0x1e/0xf0 block/blk-rq-qos.c:297
disk_release_mq block/genhd.c:1142 [inline]
disk_release+0x191/0x420 block/genhd.c:1168
device_release+0x9f/0x240 drivers/base/core.c:2229
kobject_cleanup lib/kobject.c:705 [inline]
kobject_release lib/kobject.c:736 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c8/0x540 lib/kobject.c:753
put_device+0x1b/0x30 drivers/base/core.c:3512
blkdev_close+0x64/0x80 block/fops.c:512
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:164
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:294
do_syscall_64+0x42/0x80 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f9eb65a9fc3
Code: 48 ff ff ff b8 ff ff ff ff e9 3e ff ff ff 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8
RSP: 002b:00007ffdb465f5d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 00007f9eb648e6a8 RCX: 00007f9eb65a9fc3
RDX: 000000000000001c RSI: 00007ffdb465edd8 RDI: 0000000000000008
RBP: 000055bf88f240c0 R08: 0000000000000007 R09: 000055bf88f36110
R10: 00007f9eb6638fc0 R11: 0000000000000246 R12: 0000000000000002
R13: 000055bf88f34760 R14: 0000000000000008 R15: 000055bf88efe910
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__lock_acquire+0xd85/0x56c0 kernel/locking/lockdep.c:4899
Code: 1a 0e 41 be 01 00 00 00 0f 86 c8 00 00 00 89 05 21 8d 1a 0e e9 bd 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 15 31 00 00 48 81 3b 20 d4 22 8f 0f 84 4f f3 ff
RSP: 0018:ffffc90003e7f9f0 EFLAGS: 00010012
RAX: dffffc0000000000 RBX: 0000000000000150 RCX: 0000000000000000
RDX: 000000000000002a RSI: 0000000000000000 RDI: 0000000000000150
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: ffff88801b90d700 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f9eb648e840(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffdb4657128 CR3: 0000000075f97000 CR4: 0000000000350ee0
----------------
Code disassembly (best guess):
0: 1a 0e sbb (%rsi),%cl
2: 41 be 01 00 00 00 mov $0x1,%r14d
8: 0f 86 c8 00 00 00 jbe 0xd6
e: 89 05 21 8d 1a 0e mov %eax,0xe1a8d21(%rip) # 0xe1a8d35
14: e9 bd 00 00 00 jmpq 0xd6
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 da mov %rbx,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 15 31 00 00 jne 0x3149
34: 48 81 3b 20 d4 22 8f cmpq $0xffffffff8f22d420,(%rbx)
3b: 0f .byte 0xf
3c: 84 4f f3 test %cl,-0xd(%rdi)
3f: ff .byte 0xff
---
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.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
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