From: syzbot <syzbot+0abcc185100dc8ec6541@syzkaller.appspotmail.com>
To: amir73il@gmail.com, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-unionfs@vger.kernel.org,
miklos@szeredi.hu, syzkaller-bugs@googlegroups.com
Subject: [syzbot] [overlayfs?] WARNING in ovl_workdir_create (2)
Date: Mon, 13 Nov 2023 17:55:21 -0800 [thread overview]
Message-ID: <000000000000544c4b060a13147a@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 4bbdb725a36b Merge tag 'iommu-updates-v6.7' of git://git.k..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=103c14a8e80000
kernel config: https://syzkaller.appspot.com/x/.config?x=beb32a598fd79db9
dashboard link: https://syzkaller.appspot.com/bug?extid=0abcc185100dc8ec6541
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8e84be2b8c53/disk-4bbdb725.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ee6cfe1eb699/vmlinux-4bbdb725.xz
kernel image: https://storage.googleapis.com/syzbot-assets/86d1021e070d/bzImage-4bbdb725.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0abcc185100dc8ec6541@syzkaller.appspotmail.com
------------[ cut here ]------------
DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff888043a7c590, owner = 0x0, curr 0xffff88801f6b8000, list empty
WARNING: CPU: 1 PID: 5298 at kernel/locking/rwsem.c:1370 __up_write kernel/locking/rwsem.c:1369 [inline]
WARNING: CPU: 1 PID: 5298 at kernel/locking/rwsem.c:1370 up_write+0x4f4/0x580 kernel/locking/rwsem.c:1632
Modules linked in:
CPU: 1 PID: 5298 Comm: syz-executor.3 Not tainted 6.6.0-syzkaller-15601-g4bbdb725a36b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:__up_write kernel/locking/rwsem.c:1369 [inline]
RIP: 0010:up_write+0x4f4/0x580 kernel/locking/rwsem.c:1632
Code: 48 c7 c7 40 a3 6a 8b 48 c7 c6 80 a5 6a 8b 48 8b 54 24 28 48 8b 4c 24 18 4d 89 e0 4c 8b 4c 24 30 53 e8 b0 db e7 ff 48 83 c4 08 <0f> 0b e9 75 fd ff ff 48 c7 c1 00 00 01 8f 80 e1 07 80 c1 03 38 c1
RSP: 0018:ffffc9000535f500 EFLAGS: 00010296
RAX: 512c164c8d25da00 RBX: ffffffff8b6aa420 RCX: 0000000000040000
RDX: ffffc9000bd1f000 RSI: 000000000001d66e RDI: 000000000001d66f
RBP: ffffc9000535f5d0 R08: ffffffff81547c82 R09: 1ffff92000a6be40
R10: dffffc0000000000 R11: fffff52000a6be41 R12: 0000000000000000
R13: ffff888043a7c590 R14: 1ffff92000a6bea8 R15: dffffc0000000000
FS: 00007fa12d7f86c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3202a000 CR3: 000000001ed61000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
inode_unlock include/linux/fs.h:807 [inline]
ovl_workdir_create+0x8e1/0x970 fs/overlayfs/super.c:367
ovl_make_workdir fs/overlayfs/super.c:662 [inline]
ovl_get_workdir+0x2fb/0x1a10 fs/overlayfs/super.c:820
ovl_fill_super+0x12cb/0x35c0 fs/overlayfs/super.c:1376
vfs_get_super fs/super.c:1338 [inline]
get_tree_nodev+0xb4/0x140 fs/super.c:1357
vfs_get_tree+0x8c/0x280 fs/super.c:1771
do_new_mount+0x28f/0xae0 fs/namespace.c:3337
do_mount fs/namespace.c:3677 [inline]
__do_sys_mount fs/namespace.c:3886 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa12ca7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa12d7f80c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa12cb9c050 RCX: 00007fa12ca7cae9
RDX: 0000000020000340 RSI: 0000000020000100 RDI: 0000000000000000
RBP: 00007fa12cac847a R08: 0000000020000080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa12cb9c050 R15: 00007fff601bc678
</TASK>
---
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reply other threads:[~2023-11-14 1:55 UTC|newest]
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