------------[ cut here ]------------
kernel BUG at fs/ext4/extents.c:3180!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4432 Comm: syz.4.1106 Tainted: G        W         5.10.237-syzkaller-00010-gcf6ed0f1511d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ext4_split_extent_at+0xe6e/0xe90 fs/ext4/extents.c:3180
Code: 48 89 df 48 89 74 24 68 e8 cf 8b d3 ff 48 8b 74 24 68 e9 5a fb ff ff e8 40 9c 99 ff 0f 0b e8 39 9c 99 ff 0f 0b e8 32 9c 99 ff <0f> 0b e8 2b 9c 99 ff 0f 0b e8 24 9c 99 ff 0f 0b e8 1d 9c 99 ff 0f
RSP: 0018:ffffc90000e663a0 EFLAGS: 00010293
RAX: ffffffff81c9f63e RBX: 0000000000008001 RCX: ffff88811703a780
RDX: 0000000000000000 RSI: 000000000000004b RDI: 0000000000000049
RBP: ffffc90000e66510 R08: 0000000000000017 R09: 000000000000043b
R10: ffffed1024e3814a R11: 1ffff11024e38148 R12: 0000000000000017
R13: 000000000000004a R14: 1ffff11027c33495 R15: 000000000000004b
FS:  00007f9e80d7f6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9e82737969 CR3: 000000011fa27000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ext4_split_extent+0x386/0x4e0 fs/ext4/extents.c:3379
 ext4_split_convert_extents fs/ext4/extents.c:3708 [inline]
 ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3869 [inline]
 ext4_ext_map_blocks+0x1b38/0x5d40 fs/ext4/extents.c:4224
 ext4_map_blocks+0x978/0x1bc0 fs/ext4/inode.c:674
 mpage_map_one_extent fs/ext4/inode.c:2452 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2505 [inline]
 ext4_writepages+0x11d5/0x2e00 fs/ext4/inode.c:2873
 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:2912 [inline]
 ext4_buffered_write_iter+0x59b/0x640 fs/ext4/file.c:278
 ext4_file_write_iter+0x536/0x1980 fs/ext4/file.c:-1
 __kernel_write+0x55a/0x910 fs/read_write.c:550
 dump_emit+0x240/0x360 fs/coredump.c:849
 dump_user_range+0x6a/0x1a0 fs/coredump.c:902
 elf_core_dump+0x278a/0x2bc0 fs/binfmt_elf.c:2290
 do_coredump+0x1ac9/0x27f0 fs/coredump.c:811
 get_signal+0xf23/0x12e0 kernel/signal.c:2779
 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169
 exit_to_user_mode_prepare kernel/entry/common.c:199 [inline]
 irqentry_exit_to_user_mode+0x4e/0x80 kernel/entry/common.c:287
 irqentry_exit+0x12/0x60 kernel/entry/common.c:375
 exc_stack_segment+0x49/0x50 arch/x86/kernel/traps.c:283
 asm_exc_stack_segment+0x1e/0x30 arch/x86/include/asm/idtentry.h:564
RIP: 0033:0x7f9e82737971
Code: 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 83 c8 ff c3 66 2e 0f 1f
RSP: 002b:21a9964e16e9c810 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f9e8295f080 RCX: 00007f9e82737969
RDX: 0000000000000000 RSI: 21a9964e16e9c810 RDI: 0000000000000000
RBP: 00007f9e827b9ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9e8295f080 R15: 00007ffe0fc98538
Modules linked in:
---[ end trace 285d217b8638fb43 ]---
RIP: 0010:ext4_split_extent_at+0xe6e/0xe90 fs/ext4/extents.c:3180
Code: 48 89 df 48 89 74 24 68 e8 cf 8b d3 ff 48 8b 74 24 68 e9 5a fb ff ff e8 40 9c 99 ff 0f 0b e8 39 9c 99 ff 0f 0b e8 32 9c 99 ff <0f> 0b e8 2b 9c 99 ff 0f 0b e8 24 9c 99 ff 0f 0b e8 1d 9c 99 ff 0f
RSP: 0018:ffffc90000e663a0 EFLAGS: 00010293
RAX: ffffffff81c9f63e RBX: 0000000000008001 RCX: ffff88811703a780
RDX: 0000000000000000 RSI: 000000000000004b RDI: 0000000000000049
RBP: ffffc90000e66510 R08: 0000000000000017 R09: 000000000000043b
R10: ffffed1024e3814a R11: 1ffff11024e38148 R12: 0000000000000017
R13: 000000000000004a R14: 1ffff11027c33495 R15: 000000000000004b
FS:  00007f9e80d7f6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f92c79a1ab8 CR3: 000000011fa27000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400