Re: [syzbot] [ocfs2?] kernel BUG in ocfs2_truncate_file

[syzbot <syzbot+b93b65ee321c97861072@syzkaller.appspotmail.com>]

syzbot has found a reproducer for the following issue on:

HEAD commit:    d082ecbc71e9 Linux 6.14-rc4
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=14b126e4580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5b4c41bdaeea1964
dashboard link: https://syzkaller.appspot.com/bug?extid=b93b65ee321c97861072
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=166f77f8580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12b126e4580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-d082ecbc.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c5299c562b1f/vmlinux-d082ecbc.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c0bed38fa342/bzImage-d082ecbc.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/30f6f2b1247c/mount_0.gz
  fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=10b126e4580000)

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b93b65ee321c97861072@syzkaller.appspotmail.com

(syz-executor151,5310,0):ocfs2_truncate_file:460 ERROR: bug expression: le64_to_cpu(fe->i_size) != i_size_read(inode)
(syz-executor151,5310,0):ocfs2_truncate_file:460 ERROR: Inode 17058, inode i_size = 0 != di i_size = 281481419161600, i_flags = 0x67bd
------------[ cut here ]------------
kernel BUG at fs/ocfs2/file.c:460!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5310 Comm: syz-executor151 Not tainted 6.14.0-rc4-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ocfs2_truncate_file+0x139f/0x1560 fs/ocfs2/file.c:454
Code: 40 01 00 00 48 c7 c6 46 0d 35 8e ba cc 01 00 00 48 c7 c1 c0 69 69 8c 4d 89 e8 4d 89 f9 50 41 56 e8 d6 96 19 00 48 83 c4 10 90 <0f> 0b e8 4a f1 4b 08 f3 0f 1e fa 65 44 8b 35 aa 7a 47 7c bf 07 00
RSP: 0018:ffffc9000d257280 EFLAGS: 00010282
RAX: 5796f80f25df1300 RBX: ffff888048ec542c RCX: 5796f80f25df1300
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000d2574b0 R08: ffffffff81a113fc R09: 1ffff92001a4adbc
R10: dffffc0000000000 R11: fffff52001a4adbd R12: 1ffff110091d8a84
R13: 00000000000042a2 R14: 0001000180000000 R15: 0000000000000000
FS:  000055558b494380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056519020e6c0 CR3: 0000000043316000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_setattr+0x1890/0x1ef0 fs/ocfs2/file.c:1212
 notify_change+0xbca/0xe90 fs/attr.c:552
 do_truncate+0x220/0x310 fs/open.c:65
 handle_truncate fs/namei.c:3451 [inline]
 do_open fs/namei.c:3834 [inline]
 path_openat+0x2e1b/0x3590 fs/namei.c:3989
 do_filp_open+0x27f/0x4e0 fs/namei.c:4016
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1428
 do_sys_open fs/open.c:1443 [inline]
 __do_sys_openat fs/open.c:1459 [inline]
 __se_sys_openat fs/open.c:1454 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1454
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff7d0f62e59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffce7922bd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff7d0f62e59
RDX: 000000000000275a RSI: 0000400000000040 RDI: 00000000ffffff9c
RBP: 0000400000000040 R08: 000055558b4954c0 R09: 000055558b4954c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffce7922c00
R13: 0000400000004500 R14: 00007ffce7922c00 R15: 00007ff7d0fac03b
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_truncate_file+0x139f/0x1560 fs/ocfs2/file.c:454
Code: 40 01 00 00 48 c7 c6 46 0d 35 8e ba cc 01 00 00 48 c7 c1 c0 69 69 8c 4d 89 e8 4d 89 f9 50 41 56 e8 d6 96 19 00 48 83 c4 10 90 <0f> 0b e8 4a f1 4b 08 f3 0f 1e fa 65 44 8b 35 aa 7a 47 7c bf 07 00
RSP: 0018:ffffc9000d257280 EFLAGS: 00010282
RAX: 5796f80f25df1300 RBX: ffff888048ec542c RCX: 5796f80f25df1300
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000d2574b0 R08: ffffffff81a113fc R09: 1ffff92001a4adbc
R10: dffffc0000000000 R11: fffff52001a4adbd R12: 1ffff110091d8a84
R13: 00000000000042a2 R14: 0001000180000000 R15: 0000000000000000
FS:  000055558b494380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056519020e6c0 CR3: 0000000043316000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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