EXT4-fs (loop8): Free/Dirty block details
EXT4-fs (loop8): free_blocks=66060288
EXT4-fs (loop8): dirty_blocks=16
EXT4-fs (loop8): Block reservation details
EXT4-fs (loop8): i_reserved_data_blocks=1
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2760!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 12899 Comm: syz.8.1911 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:ext4_writepages+0x2e41/0x2e50 fs/ext4/inode.c:2759
Code: c1 03 38 c1 0f 8c ac fd ff ff 4c 89 e7 e8 77 91 ad ff e9 9f fd ff ff e8 3d 70 5d ff 0f 0b e8 36 70 5d ff 0f 0b e8 2f 70 5d ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 41 57 41 56 41 54
RSP: 0018:ffffc9000c73f200 EFLAGS: 00010287
RAX: ffffffff82236061 RBX: 000000c41000c000 RCX: 0000000000080000
RDX: ffffc900107e8000 RSI: 000000000002464d RDI: 000000000002464e
RBP: ffffc9000c73f570 R08: dffffc0000000000 R09: ffffed1009adb00b
R10: ffffed1009adb00b R11: 1ffff11009adb00a R12: 1ffff920018e7ef0
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff888072d50000
FS:  00007fb6411ac6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555567ce8808 CR3: 00000000576d6000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x3b7/0x610 mm/page-writeback.c:2491
 filemap_fdatawrite_wbc+0x11e/0x180 mm/filemap.c:388
 __filemap_fdatawrite_range mm/filemap.c:421 [inline]
 filemap_write_and_wait_range+0x10b/0x1d0 mm/filemap.c:674
 filemap_write_and_wait include/linux/pagemap.h:60 [inline]
 iomap_bmap+0x19d/0x370 fs/iomap/fiemap.c:110
 ext4_bmap+0x2b3/0x3f0 fs/ext4/inode.c:3235
 bmap+0xa2/0xd0 fs/inode.c:1885
 ioctl_fibmap fs/ioctl.c:77 [inline]
 file_ioctl fs/ioctl.c:327 [inline]
 do_vfs_ioctl+0x19e8/0x1d10 fs/ioctl.c:849
 __do_sys_ioctl fs/ioctl.c:868 [inline]
 __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fb64038eba9
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:00007fb6411ac038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb6405d6090 RCX: 00007fb64038eba9
RDX: 0000200000000080 RSI: 0000000000000001 RDI: 0000000000000006
RBP: 00007fb640411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb6405d6128 R14: 00007fb6405d6090 R15: 00007ffda7c11978
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_writepages+0x2e41/0x2e50 fs/ext4/inode.c:2759
Code: c1 03 38 c1 0f 8c ac fd ff ff 4c 89 e7 e8 77 91 ad ff e9 9f fd ff ff e8 3d 70 5d ff 0f 0b e8 36 70 5d ff 0f 0b e8 2f 70 5d ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 41 57 41 56 41 54
RSP: 0018:ffffc9000c73f200 EFLAGS: 00010287
RAX: ffffffff82236061 RBX: 000000c41000c000 RCX: 0000000000080000
RDX: ffffc900107e8000 RSI: 000000000002464d RDI: 000000000002464e
RBP: ffffc9000c73f570 R08: dffffc0000000000 R09: ffffed1009adb00b
R10: ffffed1009adb00b R11: 1ffff11009adb00a R12: 1ffff920018e7ef0
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff888072d50000
FS:  00007fb6411ac6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3c7bab CR3: 00000000576d6000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400