------------[ cut here ]------------ kernel BUG at fs/ext4/extents.c:3185! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 733 Comm: syz-executor.3 Not tainted 5.15.182-syzkaller-1080481-g57725b368731 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 RIP: 0010:ext4_split_extent_at+0xe77/0xe90 fs/ext4/extents.c:3185 Code: 6f fb ff ff 48 89 df 49 89 d7 e8 04 8a d3 ff 4c 89 fa e9 5c fb ff ff e8 07 19 95 ff 0f 0b e8 00 19 95 ff 0f 0b e8 f9 18 95 ff <0f> 0b e8 f2 18 95 ff 0f 0b e8 eb 18 95 ff 0f 0b e8 e4 18 95 ff 0f RSP: 0018:ffffc90001c5ef20 EFLAGS: 00010293 RAX: ffffffff81d387c7 RBX: 1ffff1102487ee02 RCX: ffff8881125713c0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90001c5f090 R08: 0000000000000010 R09: 000000000000003b R10: ffffed102278a60a R11: 1ffff1102278a608 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000010 FS: 00007fad6091e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002003f000 CR3: 000000011da92000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ext4_split_extent+0x386/0x4e0 fs/ext4/extents.c:3384 ext4_split_convert_extents fs/ext4/extents.c:3714 [inline] ext4_ext_handle_unwritten_extents fs/ext4/extents.c:3875 [inline] ext4_ext_map_blocks+0x1b6c/0x6270 fs/ext4/extents.c:4230 ext4_map_blocks+0x97b/0x1b20 fs/ext4/inode.c:674 ext4_iomap_alloc fs/ext4/inode.c:3432 [inline] ext4_iomap_begin+0x72a/0xa90 fs/ext4/inode.c:3482 iomap_iter+0x57d/0xaf0 fs/iomap/iter.c:74 __iomap_dio_rw+0xa15/0x19f0 fs/iomap/direct-io.c:597 iomap_dio_rw+0x3e/0x90 fs/iomap/direct-io.c:684 ext4_dio_write_iter fs/ext4/file.c:542 [inline] ext4_file_write_iter+0xe9a/0x14c0 fs/ext4/file.c:662 call_write_iter include/linux/fs.h:2204 [inline] new_sync_write fs/read_write.c:507 [inline] vfs_write+0x802/0xf70 fs/read_write.c:594 ksys_write+0x140/0x240 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: 0033:0x7fad6917c959 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fad6091e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fad6929c050 RCX: 00007fad6917c959 RDX: 0000000000000012 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007fad691d8c88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007fad6929c050 R15: 00007ffd0f439518 Modules linked in: ---[ end trace 362f7602f9017218 ]--- RIP: 0010:ext4_split_extent_at+0xe77/0xe90 fs/ext4/extents.c:3185 Code: 6f fb ff ff 48 89 df 49 89 d7 e8 04 8a d3 ff 4c 89 fa e9 5c fb ff ff e8 07 19 95 ff 0f 0b e8 00 19 95 ff 0f 0b e8 f9 18 95 ff <0f> 0b e8 f2 18 95 ff 0f 0b e8 eb 18 95 ff 0f 0b e8 e4 18 95 ff 0f RSP: 0018:ffffc90001c5ef20 EFLAGS: 00010293 RAX: ffffffff81d387c7 RBX: 1ffff1102487ee02 RCX: ffff8881125713c0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc90001c5f090 R08: 0000000000000010 R09: 000000000000003b R10: ffffed102278a60a R11: 1ffff1102278a608 R12: dffffc0000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000010 FS: 00007fad6091e6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002003f000 CR3: 000000011da92000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400