[v6.1] kernel BUG in ocfs2_truncate_inline

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 7ec6f9fa3d97 Linux 6.1.114
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11371f27980000
kernel config: https://syzkaller.appspot.com/x/.config?x=344cdb747ab79921
dashboard link: https://syzkaller.appspot.com/bug?extid=a419775c49486e69d552
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/e7551ab2b38b/disk-7ec6f9fa.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/99ca69a69b01/vmlinux-7ec6f9fa.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0d62742f11c2/Image-7ec6f9fa.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a41977...@syzkaller.appspotmail.com

ocfs2: Mounting device (7,3) on (node local, slot 0) with ordered data mode.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/alloc.c:7395!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4491 Comm: syz.3.33 Not tainted 6.1.114-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 : ocfs2_truncate_inline+0x744/0x748 fs/ocfs2/alloc.c:7395
lr : ocfs2_truncate_inline+0x744/0x748 fs/ocfs2/alloc.c:7395
sp : ffff8000213d7100
x29: ffff8000213d71c0 x28: 00000000fffffffd x27: 0000000000000004
x26: ffff0000f225ec88 x25: 0000000000000007 x24: 1fffe0001e44bd91
x23: 0000000000000007 x22: ffff0000dc85c000 x21: ffff0000f60a0400
x20: ffff0000f225ec38 x19: 0000000000000004 x18: 1ffff0000427aefc
x17: 0000000000000000 x16: ffff800012290d3c x15: 0000000000000002
x14: 000000004030582b x13: ffff0000d6243780 x12: 0000000000040000
x11: 0000000000000e00 x10: ffff800023b5e000 x9 : ffff800009e58e0c
x8 : 0000000000000e01 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000004
x2 : 0000000000000007 x1 : 0000000000000007 x0 : 0000000000000004
Call trace:
ocfs2_truncate_inline+0x744/0x748 fs/ocfs2/alloc.c:7395
ocfs2_remove_inode_range+0x560/0x25c0 fs/ocfs2/file.c:1787
__ocfs2_change_file_space+0x830/0xd38 fs/ocfs2/file.c:2017
ocfs2_fallocate+0x288/0x2e4 fs/ocfs2/file.c:2127
vfs_fallocate+0x478/0x5b4 fs/open.c:323
ioctl_preallocate+0x278/0x324 fs/ioctl.c:290
do_vfs_ioctl+0x1ad8/0x26f8 fs/ioctl.c:849
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856
__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:140
do_el0_svc+0x64/0x218 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
Code: aa1303e0 97ac8379 17ffffc4 979a7a94 (d4210000)
---[ 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

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 7ec6f9fa3d97 Linux 6.1.114
git tree: linux-6.1.y

console output: https://syzkaller.appspot.com/x/log.txt?x=1699b65f980000

kernel config: https://syzkaller.appspot.com/x/.config?x=344cdb747ab79921
dashboard link: https://syzkaller.appspot.com/bug?extid=a419775c49486e69d552
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=170824a7980000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1199b65f980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e7551ab2b38b/disk-7ec6f9fa.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/99ca69a69b01/vmlinux-7ec6f9fa.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0d62742f11c2/Image-7ec6f9fa.gz.xz

mounted in repro: https://storage.googleapis.com/syzbot-assets/775f7a8e0c82/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a41977...@syzkaller.appspotmail.com

option from the mount to silence this warning.
=======================================================
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.

------------[ cut here ]------------
kernel BUG at fs/ocfs2/alloc.c:7395!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:

CPU: 0 PID: 4289 Comm: syz-executor404 Not tainted 6.1.114-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 : ocfs2_truncate_inline+0x744/0x748 fs/ocfs2/alloc.c:7395
lr : ocfs2_truncate_inline+0x744/0x748 fs/ocfs2/alloc.c:7395

sp : ffff800020f07100
x29: ffff800020f071c0 x28: 00000000fffffffd x27: 0000000000000004
x26: ffff0000e1b95e48 x25: 0000000000000007 x24: 1fffe0001c372bc9
x23: 0000000000000007 x22: ffff0000de654000 x21: ffff000187e06400
x20: ffff0000e1b95df8 x19: 0000000000000004 x18: ffff800020f072a0
x17: ffff800018aab000 x16: ffff800012290d3c x15: 0000000000000000
x14: 000000004030582b x13: ffff0000d2d73780 x12: ffff7000041e0e28
x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff800009e58e0c
x8 : ffff0000d2d73780 x7 : 0000000000000000 x6 : 0000000000000000

x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000004
x2 : 0000000000000007 x1 : 0000000000000007 x0 : 0000000000000004
Call trace:
ocfs2_truncate_inline+0x744/0x748 fs/ocfs2/alloc.c:7395
ocfs2_remove_inode_range+0x560/0x25c0 fs/ocfs2/file.c:1787
__ocfs2_change_file_space+0x830/0xd38 fs/ocfs2/file.c:2017
ocfs2_fallocate+0x288/0x2e4 fs/ocfs2/file.c:2127
vfs_fallocate+0x478/0x5b4 fs/open.c:323
ioctl_preallocate+0x278/0x324 fs/ioctl.c:290
do_vfs_ioctl+0x1ad8/0x26f8 fs/ioctl.c:849
__do_sys_ioctl fs/ioctl.c:868 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856
__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:140
do_el0_svc+0x64/0x218 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
Code: aa1303e0 97ac8379 17ffffc4 979a7a94 (d4210000)
---[ end trace 0000000000000000 ]---


---

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

[syzbot]

syzbot suspects this issue was fixed by commit:

commit 2fe5d62e122b040ce7fc4d31aa7fa96ae328cefc
Author: Edward Adam Davis <ead...@qq.com>
Date: Wed Oct 16 11:43:47 2024 +0000

ocfs2: pass u64 to ocfs2_truncate_inline maybe overflow

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1191a4f8580000
start commit: 7ec6f9fa3d97 Linux 6.1.114
git tree: linux-6.1.y

kernel config: https://syzkaller.appspot.com/x/.config?x=344cdb747ab79921
dashboard link: https://syzkaller.appspot.com/bug?extid=a419775c49486e69d552

userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=162f9230580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15fab24b980000

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

#syz fix: ocfs2: pass u64 to ocfs2_truncate_inline maybe overflow

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