assertion failed: block_start != EXTENT_MAP_HOLE :: 0, in fs/btrfs/extent_io.c:1522 ------------[ cut here ]------------ kernel BUG at fs/btrfs/extent_io.c:1522! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 6963 Comm: syz.3.18 Not tainted 6.16.0-rc2-syzkaller-00082-gfb4d33ab452e #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:1522 [inline] RIP: 0010:extent_writepage_io+0xe28/0xf30 fs/btrfs/extent_io.c:1611 Code: 0f 0b e8 6b 43 f5 fd 48 c7 c7 40 08 ce 8b 48 c7 c6 60 19 ce 8b 31 d2 48 c7 c1 e0 07 ce 8b 41 b8 f2 05 00 00 e8 39 72 5c fd 90 <0f> 0b e8 41 43 f5 fd 48 8b 7c 24 20 48 c7 c6 20 0d ce 8b e8 c0 d8 RSP: 0018:ffffc9000430f060 EFLAGS: 00010246 RAX: 0000000000000053 RBX: ffffea0001cc0448 RCX: 790304952b05f300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc9000430f1f0 R08: ffffc9000430ed87 R09: 1ffff92000861db0 R10: dffffc0000000000 R11: fffff52000861db1 R12: dffffc0000000000 R13: 0000000000007000 R14: 0000000000000fff R15: fffffffffffffffd FS: 00007f5a1c5fe6c0(0000) GS:ffff888125d85000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000563206b7d950 CR3: 0000000032292000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: extent_writepage fs/btrfs/extent_io.c:1723 [inline] extent_write_cache_pages fs/btrfs/extent_io.c:2403 [inline] btrfs_writepages+0x1491/0x21a0 fs/btrfs/extent_io.c:2536 do_writepages+0x32e/0x550 mm/page-writeback.c:2636 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:3802 btrfs_direct_write+0x637/0xb10 fs/btrfs/direct-io.c:976 btrfs_do_write_iter+0x25f/0x710 fs/btrfs/file.c:1438 do_iter_readv_writev+0x56b/0x7f0 fs/read_write.c:-1 vfs_writev+0x31a/0x960 fs/read_write.c:1057 do_pwritev fs/read_write.c:1153 [inline] __do_sys_pwritev2 fs/read_write.c:1211 [inline] __se_sys_pwritev2+0x179/0x290 fs/read_write.c:1202 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5a1d37dff9 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:00007f5a1c5fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f5a1d536130 RCX: 00007f5a1d37dff9 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000004 RBP: 00007f5a1d3f0296 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007800 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f5a1d536130 R15: 00007ffe08c329d8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:submit_one_sector fs/btrfs/extent_io.c:1522 [inline] RIP: 0010:extent_writepage_io+0xe28/0xf30 fs/btrfs/extent_io.c:1611 Code: 0f 0b e8 6b 43 f5 fd 48 c7 c7 40 08 ce 8b 48 c7 c6 60 19 ce 8b 31 d2 48 c7 c1 e0 07 ce 8b 41 b8 f2 05 00 00 e8 39 72 5c fd 90 <0f> 0b e8 41 43 f5 fd 48 8b 7c 24 20 48 c7 c6 20 0d ce 8b e8 c0 d8 RSP: 0018:ffffc9000430f060 EFLAGS: 00010246 RAX: 0000000000000053 RBX: ffffea0001cc0448 RCX: 790304952b05f300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc9000430f1f0 R08: ffffc9000430ed87 R09: 1ffff92000861db0 R10: dffffc0000000000 R11: fffff52000861db1 R12: dffffc0000000000 R13: 0000000000007000 R14: 0000000000000fff R15: fffffffffffffffd FS: 00007f5a1c5fe6c0(0000) GS:ffff888125c85000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb7585f5000 CR3: 0000000032292000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400