[syzbot] [ext4?] kernel BUG in ext4_write_inline_data (5)

[syzbot] [ext4?] kernel BUG in ext4_write_inline_data (5)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    9154c4af7829 Merge tag 'mmc-v7.1-rc3' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=161d8f2e580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bd38685893011045
dashboard link: https://syzkaller.appspot.com/bug?extid=53c8bd6136cfbe85197e
compiler:       Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d4d939a8f4d3/disk-9154c4af.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6fd4009d5e57/vmlinux-9154c4af.xz
kernel image: https://storage.googleapis.com/syzbot-assets/d924d24cd0a4/bzImage-9154c4af.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+53c8bd6136cfbe85197e@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/ext4/inline.c:240!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6427 Comm: syz.2.110 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:ext4_write_inline_data+0x43c/0x440 fs/ext4/inline.c:240
Code: c1 38 c1 0f 8c 19 ff ff ff 48 89 df 49 89 d7 e8 7a 1f b0 ff 4c 89 fa e9 06 ff ff ff e8 3d f2 48 ff 90 0f 0b e8 35 f2 48 ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f
RSP: 0000:ffffc9000d34f808 EFLAGS: 00010293
RAX: ffffffff827b79eb RBX: 0000000000002cf3 RCX: ffff88803ec71ec0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88804391b8fa R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100bc12881 R12: 000000000000003c
R13: ffffc9000d34f8e0 R14: 0000000000002cf2 R15: ffff88804391b1e8
FS:  00007f7639c7d6c0(0000) GS:ffff888126283000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000813 CR3: 000000003cc4a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_write_inline_data_end+0x332/0xaf0 fs/ext4/inline.c:825
 generic_perform_write+0x5f7/0x8b0 mm/filemap.c:4346
 ext4_buffered_write_iter+0xd0/0x3a0 fs/ext4/file.c:316
 ext4_file_write_iter+0x299/0x1c10 fs/ext4/file.c:-1
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x629/0xba0 fs/read_write.c:688
 ksys_pwrite64 fs/read_write.c:795 [inline]
 __do_sys_pwrite64 fs/read_write.c:803 [inline]
 __se_sys_pwrite64 fs/read_write.c:800 [inline]
 __x64_sys_pwrite64+0x19c/0x230 fs/read_write.c:800
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f763ba4ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7639c7d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f763bcc6090 RCX: 00007f763ba4ce59
RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000004
RBP: 00007f763bae2d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000002cf2 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f763bcc6128 R14: 00007f763bcc6090 R15: 00007ffe7dfe22b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_write_inline_data+0x43c/0x440 fs/ext4/inline.c:240
Code: c1 38 c1 0f 8c 19 ff ff ff 48 89 df 49 89 d7 e8 7a 1f b0 ff 4c 89 fa e9 06 ff ff ff e8 3d f2 48 ff 90 0f 0b e8 35 f2 48 ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f
RSP: 0000:ffffc9000d34f808 EFLAGS: 00010293
RAX: ffffffff827b79eb RBX: 0000000000002cf3 RCX: ffff88803ec71ec0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff88804391b8fa R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100bc12881 R12: 000000000000003c
R13: ffffc9000d34f8e0 R14: 0000000000002cf2 R15: ffff88804391b1e8
FS:  00007f7639c7d6c0(0000) GS:ffff888126283000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000813 CR3: 000000003cc4a000 CR4: 00000000003526f0


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