EXT4-fs (loop2): mounted filesystem without journal. Opts: bsdgroups,jqfmt=vfsv1,,errors=continue
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2778!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 375 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:ext4_writepages+0x2ddb/0x2e00 fs/ext4/inode.c:2777
Code: 06 94 ff 84 db 75 31 e8 03 04 94 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 6c 24 30 48 8b 5c 24 38 e9 21 f8 ff ff e8 e5 03 94 ff <0f> 0b e8 de 03 94 ff e8 85 ca 30 ff eb 98 e8 d2 03 94 ff e8 79 ca
RSP: 0018:ffffc90000e173e0 EFLAGS: 00010293
RAX: ffffffff81cfa05b RBX: 0000008410000000 RCX: ffff88810f513b40
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90000e17750 R08: dffffc0000000000 R09: ffffed1024d24185
R10: ffffed1024d24185 R11: 1ffff11024d24184 R12: dffffc0000000000
R13: ffff88810fa39000 R14: 0000008000000000 R15: ffff888126920c20
FS:  00007f97f1cb76c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000141 CR3: 000000012a8b9000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_writepages+0x12a/0x270 mm/page-writeback.c:2380
 __filemap_fdatawrite_range+0x2bc/0x360 mm/filemap.c:427
 file_write_and_wait_range+0x8c/0x110 mm/filemap.c:766
 ext4_sync_file+0x1a9/0x9f0 fs/ext4/fsync.c:151
 vfs_fsync_range+0x190/0x1a0 fs/sync.c:202
 generic_write_sync include/linux/fs.h:2920 [inline]
 ext4_buffered_write_iter+0x59b/0x640 fs/ext4/file.c:278
 ext4_file_write_iter+0x536/0x1980 fs/ext4/file.c:-1
 call_write_iter include/linux/fs.h:2066 [inline]
 new_sync_write fs/read_write.c:518 [inline]
 vfs_write+0x725/0xd60 fs/read_write.c:605
 ksys_write+0x140/0x240 fs/read_write.c:658
 __do_sys_write fs/read_write.c:670 [inline]
 __se_sys_write fs/read_write.c:667 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:667
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f97f1e47749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f97f1cb7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f97f209dfa0 RCX: 00007f97f1e47749
RDX: 0000000000000004 RSI: 0000200000000140 RDI: 0000000000000004
RBP: 00007f97f1ecbf91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f97f209e038 R14: 00007f97f209dfa0 R15: 00007ffcb4d9a958
Modules linked in:
---[ end trace 7961ee5dff0eefd4 ]---
RIP: 0010:ext4_writepages+0x2ddb/0x2e00 fs/ext4/inode.c:2777
Code: 06 94 ff 84 db 75 31 e8 03 04 94 ff 49 bc 00 00 00 00 00 fc ff df 4c 8b 6c 24 30 48 8b 5c 24 38 e9 21 f8 ff ff e8 e5 03 94 ff <0f> 0b e8 de 03 94 ff e8 85 ca 30 ff eb 98 e8 d2 03 94 ff e8 79 ca
RSP: 0018:ffffc90000e173e0 EFLAGS: 00010293
RAX: ffffffff81cfa05b RBX: 0000008410000000 RCX: ffff88810f513b40
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90000e17750 R08: dffffc0000000000 R09: ffffed1024d24185
R10: ffffed1024d24185 R11: 1ffff11024d24184 R12: dffffc0000000000
R13: ffff88810fa39000 R14: 0000008000000000 R15: ffff888126920c20
FS:  00007f97f1cb76c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000141 CR3: 000000012a8b9000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400