[v6.1] WARNING in reiserfs_mkdir

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: e4d90d63d385 Linux 6.1.119
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14215944580000
kernel config: https://syzkaller.appspot.com/x/.config?x=393f8074c5fb7ad6
dashboard link: https://syzkaller.appspot.com/bug?extid=2778e0eefed09b215b38
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/3986cbf4f35a/disk-e4d90d63.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d2963d16cebb/vmlinux-e4d90d63.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a877a1a23701/Image-e4d90d63.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2778e0...@syzkaller.appspotmail.com

REISERFS (device loop4): Using tea hash to sort names
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5939 at fs/inode.c:332 drop_nlink+0xe4/0x138 fs/inode.c:332
Modules linked in:
CPU: 1 PID: 5939 Comm: syz.4.357 Not tainted 6.1.119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : drop_nlink+0xe4/0x138 fs/inode.c:332
lr : drop_nlink+0xe4/0x138 fs/inode.c:332
sp : ffff800021557540
x29: ffff800021557540 x28: ffff7000042aaeb8 x27: dfff800000000000
x26: ffff0000e1250f18 x25: 00000000ffffffff x24: 1fffe0001c24a1df
x23: 1fffe0001c24a1e3 x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000e1250f18 x19: ffff0000e1250ed0 x18: ffff8000215569a0
x17: ffff800018b6a000 x16: ffff800008300db8 x15: ffff800008ad08c4
x14: ffff800008acd634 x13: ffff800008ad08c4 x12: 0000000000080000
x11: 000000000007ffff x10: ffff800024faa000 x9 : ffff800008aab0a4
x8 : 0000000000080000 x7 : ffff80000805c2c4 x6 : ffff80000805c4d4
x5 : ffff0000d138adc0 x4 : ffff800021556e68 x3 : 0000000000000000
x2 : 0000000000000006 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
drop_nlink+0xe4/0x138 fs/inode.c:332
reiserfs_mkdir+0x5e0/0x77c fs/reiserfs/namei.c:850
xattr_mkdir fs/reiserfs/xattr.c:76 [inline]
create_privroot fs/reiserfs/xattr.c:882 [inline]
reiserfs_xattr_init+0x2b0/0x6bc fs/reiserfs/xattr.c:1005
reiserfs_fill_super+0x1bfc/0x2028 fs/reiserfs/super.c:2175
mount_bdev+0x274/0x370 fs/super.c:1443
get_super_block+0x44/0x58 fs/reiserfs/super.c:2601
legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
vfs_get_tree+0x90/0x274 fs/super.c:1573
do_new_mount+0x278/0x8fc fs/namespace.c:3056
path_mount+0x590/0xe5c fs/namespace.c:3386
do_mount fs/namespace.c:3399 [inline]
__do_sys_mount fs/namespace.c:3607 [inline]
__se_sys_mount fs/namespace.c:3584 [inline]
__arm64_sys_mount+0x45c/0x594 fs/namespace.c:3584
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
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: 55208
hardirqs last enabled at (55207): [<ffff800008390e2c>] call_rcu+0x614/0xa40 kernel/rcu/tree.c:2880
hardirqs last disabled at (55208): [<ffff800012320d2c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (54538): [<ffff8000081c1c58>] softirq_handle_end kernel/softirq.c:414 [inline]
softirqs last enabled at (54538): [<ffff8000081c1c58>] handle_softirqs+0xb84/0xd58 kernel/softirq.c:599
softirqs last disabled at (54525): [<ffff800008020174>] __do_softirq+0x14/0x20 kernel/softirq.c:605
---[ end trace 0000000000000000 ]---
REISERFS warning (device loop4): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount.
loop4: detected capacity change from 0 to 32768


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[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: e4d90d63d385 Linux 6.1.119
git tree: linux-6.1.y

console output: https://syzkaller.appspot.com/x/log.txt?x=1130a3e8580000

kernel config: https://syzkaller.appspot.com/x/.config?x=393f8074c5fb7ad6
dashboard link: https://syzkaller.appspot.com/bug?extid=2778e0eefed09b215b38
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=108fc8f8580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13892b30580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3986cbf4f35a/disk-e4d90d63.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d2963d16cebb/vmlinux-e4d90d63.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a877a1a23701/Image-e4d90d63.gz.xz

mounted in repro: https://storage.googleapis.com/syzbot-assets/8d05b640b75e/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2778e0...@syzkaller.appspotmail.com

REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using tea hash to sort names
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4291 at fs/inode.c:332 drop_nlink+0xe4/0x138 fs/inode.c:332
Modules linked in:
CPU: 1 PID: 4291 Comm: syz-executor185 Not tainted 6.1.119-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024

pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : drop_nlink+0xe4/0x138 fs/inode.c:332
lr : drop_nlink+0xe4/0x138 fs/inode.c:332

sp : ffff8000210d7540
x29: ffff8000210d7540 x28: ffff70000421aeb8 x27: dfff800000000000
x26: ffff0000e48201d8 x25: 00000000ffffffff x24: 1fffe0001c904037
x23: 1fffe0001c90403b x22: dfff800000000000 x21: 0000000000000000
x20: ffff0000e48201d8 x19: ffff0000e4820190 x18: ffff8000210d69a0

x17: ffff800018b6a000 x16: ffff800008300db8 x15: ffff800008ad08c4

x14: ffff800008acd634 x13: ffff800008ad08c4 x12: 0000000000000003
x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff800008aab0a4
x8 : ffff0000de785340 x7 : ffff80000805c2c4 x6 : ffff80000805c4d4
x5 : ffff0000dac0de70 x4 : ffff8000210d6e68 x3 : 0000000000000000

irq event stamp: 33500
hardirqs last enabled at (33499): [<ffff800008390e2c>] call_rcu+0x614/0xa40 kernel/rcu/tree.c:2880
hardirqs last disabled at (33500): [<ffff800012320d2c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last enabled at (32978): [<ffff8000081c1c58>] softirq_handle_end kernel/softirq.c:414 [inline]
softirqs last enabled at (32978): [<ffff8000081c1c58>] handle_softirqs+0xb84/0xd58 kernel/softirq.c:599
softirqs last disabled at (32973): [<ffff800008020174>] __do_softirq+0x14/0x20 kernel/softirq.c:605

---[ end trace 0000000000000000 ]---

REISERFS warning (device loop0): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount.


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