------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2749!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 661 Comm: syz-executor168 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ext4_writepages+0x3080/0x30a0 fs/ext4/inode.c:2748
Code: d0 8d ff 84 db 75 31 e8 ae cd 8d ff 49 bd 00 00 00 00 00 fc ff df 4c 8b 64 24 20 48 8b 5c 24 40 e9 99 f7 ff ff e8 90 cd 8d ff <0f> 0b e8 89 cd 8d ff e8 30 7f 24 ff eb 98 e8 7d cd 8d ff e8 24 7f
RSP: 0018:ffffc90001637360 EFLAGS: 00010293
RAX: ffffffff81dbfa10 RBX: 0000008c10000000 RCX: ffff88810d52cf00
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900016376d0 R08: ffff88810994f537 R09: 1ffff11021329ea6
R10: dffffc0000000000 R11: ffffed1021329ea7 R12: ffff88810f3a6000
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff88810994f530
FS:  00007f9ae64386c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9ae63f5bb0 CR3: 0000000125fdb000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x476/0x6d0 mm/page-writeback.c:2388
 filemap_fdatawrite_wbc+0x1f4/0x250 mm/filemap.c:409
 __filemap_fdatawrite_range mm/filemap.c:442 [inline]
 file_write_and_wait_range+0x14d/0x220 mm/filemap.c:819
 ext4_sync_file+0x1ad/0xa40 fs/ext4/fsync.c:151
 vfs_fsync_range+0x171/0x180 fs/sync.c:188
 generic_write_sync include/linux/fs.h:3043 [inline]
 ext4_buffered_write_iter+0x595/0x630 fs/ext4/file.c:277
 ext4_file_write_iter+0x427/0x1530 fs/ext4/file.c:-1
 call_write_iter include/linux/fs.h:2212 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x831/0xfd0 fs/read_write.c:594
 ksys_write+0x14a/0x260 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __x64_sys_write+0x7b/0x90 fs/read_write.c:656
 x64_sys_call+0x8ef/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9ae6464549
Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9ae6438218 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f9ae650be28 RCX: 00007f9ae6464549
RDX: 000000000000045c RSI: 0000200000000400 RDI: 0000000000000004
RBP: 00007f9ae650be20 R08: 0000000000000083 R09: 36203a6b63617473
R10: 0000000000000807 R11: 0000000000000246 R12: 0000200000000240
R13: 00007f9ae64dc98c R14: 7461785f72657375 R15: 00007f9ae64d60e8
 </TASK>
Modules linked in:
---[ end trace 7f5986f01c3968ca ]---
RIP: 0010:ext4_writepages+0x3080/0x30a0 fs/ext4/inode.c:2748
Code: d0 8d ff 84 db 75 31 e8 ae cd 8d ff 49 bd 00 00 00 00 00 fc ff df 4c 8b 64 24 20 48 8b 5c 24 40 e9 99 f7 ff ff e8 90 cd 8d ff <0f> 0b e8 89 cd 8d ff e8 30 7f 24 ff eb 98 e8 7d cd 8d ff e8 24 7f
RSP: 0018:ffffc90001637360 EFLAGS: 00010293
RAX: ffffffff81dbfa10 RBX: 0000008c10000000 RCX: ffff88810d52cf00
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc900016376d0 R08: ffff88810994f537 R09: 1ffff11021329ea6
R10: dffffc0000000000 R11: ffffed1021329ea7 R12: ffff88810f3a6000
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff88810994f530
FS:  00007f9ae64386c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9ae6511b40 CR3: 0000000125fdb000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400