[syzbot] [reiserfs?] kernel BUG in reiserfs_rename

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: e40939bbfc68 Merge branch 'for-next/core' into for-kernelci
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=16c6c14ea80000
kernel config: https://syzkaller.appspot.com/x/.config?x=c4a2640e4213bc2f
dashboard link: https://syzkaller.appspot.com/bug?extid=d843d85655e23f0f643b
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=13c0600ca80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=122e48a1a80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/9d87aa312c0e/disk-e40939bb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/22a11d32a8b2/vmlinux-e40939bb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0978b5788b52/Image-e40939bb.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/b8490ef2d44b/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d843d8...@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/reiserfs/prints.c:390!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 6505 Comm: syz-executor261 Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __reiserfs_panic+0x150/0x154 fs/reiserfs/prints.c:384
lr : __reiserfs_panic+0x150/0x154 fs/reiserfs/prints.c:384
sp : ffff800099bf7140
x29: ffff800099bf7200 x28: ffff800099bf74c0
x27: ffff800099bf77d0
x26: ffff0000e03be518 x25: ffff0000e03be4f0 x24: ffff800099bf71c0
x23: ffff800099bf7180 x22: ffff80008a6b48e0 x21: ffff0000cb16e000
x20: ffff80008a6b48c0 x19: ffff80008d5ddc15 x18: 1fffe00036846fc6
x17: ffff80008deed000 x16: ffff80008a4483a0 x15: 0000000000000002
x14: 1ffff00011bde0ac x13: dfff800000000000 x12: 0000000000000001
x11: 0000000000000000
x10: 0000000000000000 x9 : 2ea19fe2f27a9800
x8 : 2ea19fe2f27a9800 x7 : ffff80008028cc04
x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001
x3 : ffff800082a98004
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000005a

Call trace:
__reiserfs_panic+0x150/0x154 fs/reiserfs/prints.c:384
reiserfs_rename+0x19d8/0x1c88 fs/reiserfs/namei.c:1425
vfs_rename+0x908/0xcd4 fs/namei.c:4849
do_renameat2+0x9f4/0x10b0 fs/namei.c:5002
__do_sys_renameat fs/namei.c:5042 [inline]
__se_sys_renameat fs/namei.c:5039 [inline]
__arm64_sys_renameat+0xc8/0xe4 fs/namei.c:5039
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191
el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647
el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
Code: 9008b365 910000a5 aa1303e4 95c56f57 (d4210000)
---[ end trace 0000000000000000 ]---


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[syzbot]

syzbot suspects this issue was fixed by commit:

commit 6f861765464f43a71462d52026fbddfc858239a5
Author: Jan Kara <ja...@suse.cz>
Date: Wed Nov 1 17:43:10 2023 +0000

fs: Block writes to mounted block devices

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=164b3816180000
start commit: bee0e7762ad2 Merge tag 'for-linus-iommufd' of git://git.ke..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=b45dfd882e46ec91
dashboard link: https://syzkaller.appspot.com/bug?extid=d843d85655e23f0f643b
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=117e7af2e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=109af986e80000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: fs: Block writes to mounted block devices

For information about bisection process see: https://goo.gl/tpsmEJ#bisection