------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2826!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 7803 Comm: syz.8.215 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:ext4_do_writepages+0x4662/0x4670 fs/ext4/inode.c:2825
Code: c6 a0 b1 63 8b e8 ae cd aa fe 90 0f[  331.162313][ T7803] Code: c6 a0 b1 63 8b e8 ae cd aa fe 90 0f 0b e8 56 92 47 ff 4c 89 f7 48 c7 c6 80 b6 63 8b e8 97 cd aa fe 90 0f 0b e8 3f 92 47 ff 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90004a7ef80 EFLAGS: 00010283
RAX: ffffffff827ce751 RBX: 0000004210000000 RCX: 0000000000080000
RDX: ffffc9001e9ab000 RSI: 0000000000000497 RDI: 0000000000000498
RBP: ffffc90004a7f390 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1007fd3185 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff110072680f3
FS:  00007f7c1bd856c0(0000) GS:ffff888126171000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0a7588dc00 CR3: 000000005cd92000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3042
 do_writepages+0x32e/0x550 mm/page-writeback.c:2571
 filemap_writeback mm/filemap.c:388 [inline]
 filemap_flush_range mm/filemap.c:437 [inline]
 filemap_flush+0x1e4/0x2f0 mm/filemap.c:452
 ext4_convert_inline_data+0x18e/0x600 fs/ext4/inline.c:1972
 ext4_fallocate+0x1eb/0x3d0 fs/ext4/extents.c:4884
 vfs_fallocate+0x672/0x7f0 fs/open.c:338
 ioctl_preallocate fs/ioctl.c:289 [inline]
 file_ioctl+0x64b/0x870 fs/ioctl.c:332
 do_vfs_ioctl+0xc29/0x1540 fs/ioctl.c:576
 __do_sys_ioctl fs/ioctl.c:595 [inline]
 __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c1db4ce59
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:00007f7c1bd85028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f7c1ddc6090 RCX: 00007f7c1db4ce59
RDX: 0000200000000100 RSI: 0000000040305829 RDI: 0000000000000006
RBP: 00007f7c1dbe2d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7c1ddc6128 R14: 00007f7c1ddc6090 R15: 00007fff0bc34c78
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x4662/0x4670 fs/ext4/inode.c:2825
Code: c6 a0 b1 63 8b e8 ae cd aa fe 90 0f 0b e8 56 92 47 ff 4c 89 f7 48 c7 c6 80 b6 63 8b e8 97 cd aa fe 90 0f 0b e8 3f 92 47 ff 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90004a7ef80 EFLAGS: 00010283
RAX: ffffffff827ce751 RBX: 0000004210000000 RCX: 0000000000080000
RDX: ffffc9001e9ab000 RSI: 0000000000000497 RDI: 0000000000000498
RBP: ffffc90004a7f390 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1007fd3185 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff110072680f3
FS:  00007f7c1bd856c0(0000) GS:ffff888126271000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffd5e4f0f8 CR3: 000000005cd92000 CR4: 00000000003526f0