[v6.1] WARNING in do_mkdirat (2)

0 views
Skip to first unread message

syzbot

unread,
Mar 26, 2024, 10:15:26 PMMar 26
to syzkaller...@googlegroups.com
Hello,

syzbot found the following issue on:

HEAD commit: e5cd595e23c1 Linux 6.1.83
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=173c9c41180000
kernel config: https://syzkaller.appspot.com/x/.config?x=638c7154137d2582
dashboard link: https://syzkaller.appspot.com/bug?extid=93acc44f8f50ebc6566f
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a9b3de36bd43/disk-e5cd595e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2af9bc6e6ea4/vmlinux-e5cd595e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/7f58381bafc0/Image-e5cd595e.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+93acc4...@syzkaller.appspotmail.com

DEBUG_RWSEMS_WARN_ON((rwsem_owner(sem) != current) && !rwsem_test_oflags(sem, RWSEM_NONSPINNABLE)): count = 0x0, magic = 0xffff0000f27180e0, owner = 0x0, curr 0xffff0000d9ee0000, list empty
WARNING: CPU: 1 PID: 8371 at kernel/locking/rwsem.c:1372 __up_write kernel/locking/rwsem.c:1371 [inline]
WARNING: CPU: 1 PID: 8371 at kernel/locking/rwsem.c:1372 up_write+0x5c4/0x76c kernel/locking/rwsem.c:1626
Modules linked in:
CPU: 1 PID: 8371 Comm: syz-executor.1 Not tainted 6.1.83-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __up_write kernel/locking/rwsem.c:1371 [inline]
pc : up_write+0x5c4/0x76c kernel/locking/rwsem.c:1626
lr : __up_write kernel/locking/rwsem.c:1371 [inline]
lr : up_write+0x5c4/0x76c kernel/locking/rwsem.c:1626
sp : ffff80001e427b80
x29: ffff80001e427c00 x28: 1ffff00003c84f90 x27: 1fffe0001e4e3029
x26: dfff800000000000 x25: 1fffe0001e4e301d x24: ffff0000f2718138
x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000d9ee0000
x20: ffff0000f27180e0 x19: ffff0000f27180e0 x18: 1fffe0003686f976
x17: ffff80001583d000 x16: ffff800008304e88 x15: ffff0001b437cbbc
x14: 1ffff00002b080b0 x13: dfff800000000000 x12: 0000000000000001
x11: 1fffe00019051910 x10: 0000000000000000 x9 : fbd2c4d647382d00
x8 : fbd2c4d647382d00 x7 : ffff80000827c8d4 x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff80000826a620
x2 : 0000000000000001 x1 : 0000000000000004 x0 : 0000000000000001
Call trace:
__up_write kernel/locking/rwsem.c:1371 [inline]
up_write+0x5c4/0x76c kernel/locking/rwsem.c:1626
inode_unlock include/linux/fs.h:763 [inline]
done_path_create fs/namei.c:3929 [inline]
do_mkdirat+0x26c/0x510 fs/namei.c:4136
__do_sys_mkdirat fs/namei.c:4148 [inline]
__se_sys_mkdirat fs/namei.c:4146 [inline]
__arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4146
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
irq event stamp: 304
hardirqs last enabled at (303): [<ffff80000827c974>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1366 [inline]
hardirqs last enabled at (303): [<ffff80000827c974>] finish_lock_switch+0xbc/0x1e8 kernel/sched/core.c:5004
hardirqs last disabled at (304): [<ffff80001214d10c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (296): [<ffff800008020d7c>] softirq_handle_end kernel/softirq.c:414 [inline]
softirqs last enabled at (296): [<ffff800008020d7c>] __do_softirq+0xc1c/0xe38 kernel/softirq.c:600
softirqs last disabled at (283): [<ffff80000802a99c>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80
---[ end trace 0000000000000000 ]---


---
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 syzk...@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 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 all
Reply to author
Forward
0 new messages