assertion failed: block_start != EXTENT_MAP_HOLE, in fs/btrfs/extent_io.c:1562 ------------[ cut here ]------------ kernel BUG at fs/btrfs/extent_io.c:1562! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 11792 Comm: syz.0.226 Not tainted 6.15.0-rc6-syzkaller-00052-g9f35e33144ae #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:submit_one_sector fs/btrfs/extent_io.c:1562 [inline] RIP: 0010:extent_writepage_io+0xe03/0xeb0 fs/btrfs/extent_io.c:1651 Code: 61 fd 90 0f 0b e8 3d 17 fa fd 48 c7 c7 00 9f ad 8b 48 c7 c6 40 ae ad 8b 48 c7 c2 a0 9e ad 8b b9 1a 06 00 00 e8 0e b3 61 fd 90 <0f> 0b e8 16 17 fa fd 48 8b 7c 24 28 48 c7 c6 40 a3 ad 8b e8 95 2b RSP: 0018:ffffc900102eefc0 EFLAGS: 00010246 RAX: 000000000000004e RBX: ffffea0001694a48 RCX: e752df6367ee7300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc900102ef150 R08: ffffc900102eeca7 R09: 1ffff9200205dd94 R10: dffffc0000000000 R11: fffff5200205dd95 R12: dffffc0000000000 R13: 0000000000002000 R14: 0000000000000fff R15: fffffffffffffffd FS: 00007f939f7b66c0(0000) GS:ffff8881261fb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fed68598000 CR3: 000000007d0e6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: extent_writepage fs/btrfs/extent_io.c:1763 [inline] extent_write_cache_pages fs/btrfs/extent_io.c:2422 [inline] btrfs_writepages+0x1466/0x2170 fs/btrfs/extent_io.c:2555 do_writepages+0x3b1/0x7b0 mm/page-writeback.c:2656 filemap_fdatawrite_wbc mm/filemap.c:386 [inline] __filemap_fdatawrite_range mm/filemap.c:419 [inline] filemap_fdatawrite_range+0x19d/0x240 mm/filemap.c:437 btrfs_fdatawrite_range+0x54/0xf0 fs/btrfs/file.c:3706 btrfs_direct_write+0x637/0xb10 fs/btrfs/direct-io.c:977 btrfs_do_write_iter+0x25f/0x710 fs/btrfs/file.c:1380 do_iter_readv_writev+0x56e/0x7f0 fs/read_write.c:-1 vfs_writev+0x306/0x9a0 fs/read_write.c:1055 do_pwritev fs/read_write.c:1151 [inline] __do_sys_pwritev2 fs/read_write.c:1209 [inline] __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1200 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f939e979e79 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:00007f939f7b6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f939eb16058 RCX: 00007f939e979e79 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00007f939e9e793e R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f939eb16058 R15: 00007fff10174558 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:submit_one_sector fs/btrfs/extent_io.c:1562 [inline] RIP: 0010:extent_writepage_io+0xe03/0xeb0 fs/btrfs/extent_io.c:1651 Code: 61 fd 90 0f 0b e8 3d 17 fa fd 48 c7 c7 00 9f ad 8b 48 c7 c6 40 ae ad 8b 48 c7 c2 a0 9e ad 8b b9 1a 06 00 00 e8 0e b3 61 fd 90 <0f> 0b e8 16 17 fa fd 48 8b 7c 24 28 48 c7 c6 40 a3 ad 8b e8 95 2b RSP: 0018:ffffc900102eefc0 EFLAGS: 00010246 RAX: 000000000000004e RBX: ffffea0001694a48 RCX: e752df6367ee7300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc900102ef150 R08: ffffc900102eeca7 R09: 1ffff9200205dd94 R10: dffffc0000000000 R11: fffff5200205dd95 R12: dffffc0000000000 R13: 0000000000002000 R14: 0000000000000fff R15: fffffffffffffffd FS: 00007f939f7b66c0(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f03ef9ff000 CR3: 000000007d0e6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400