syzbot has found a reproducer for the following issue on: HEAD commit: eaadbbaaff74 Merge tag 'fuse-fixes-6.7-rc6' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15f9a15ce80000 kernel config: https://syzkaller.appspot.com/x/.config?x=53ec3da1d259132f dashboard link: https://syzkaller.appspot.com/bug?extid=06006fc4a90bff8e8f17 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12cc9deae80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2a3a26b045d0/disk-eaadbbaa.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7ca3ec5e1332/vmlinux-eaadbbaa.xz kernel image: https://storage.googleapis.com/syzbot-assets/c8cfd867e4c2/bzImage-eaadbbaa.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/fafd72a5cce8/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+06006fc4a90bff8e8f17@xxxxxxxxxxxxxxxxxxxxxxxxx assertion failed: block_start != EXTENT_MAP_HOLE, in fs/btrfs/extent_io.c:1356 ------------[ cut here ]------------ kernel BUG at fs/btrfs/extent_io.c:1356! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 12 Comm: kworker/u4:1 Not tainted 6.7.0-rc5-syzkaller-00030-geaadbbaaff74 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Workqueue: writeback wb_workfn (flush-btrfs-137) RIP: 0010:__extent_writepage_io+0xcd5/0xd00 fs/btrfs/extent_io.c:1356 Code: 77 07 90 0f 0b e8 fb 23 f1 fd 48 c7 c7 80 c5 ab 8b 48 c7 c6 80 d2 ab 8b 48 c7 c2 20 c5 ab 8b b9 4c 05 00 00 e8 7c 49 77 07 90 <0f> 0b e8 d4 23 f1 fd 48 8b 3c 24 e8 db 22 01 00 48 89 c7 48 c7 c6 RSP: 0018:ffffc90000116f40 EFLAGS: 00010246 RAX: 000000000000004e RBX: 0000000000000000 RCX: 759e2408fa89b300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: fffffffffffffffd R08: ffffffff81713a3c R09: 1ffff92000022d3c R10: dffffc0000000000 R11: fffff52000022d3d R12: 0000000000007000 R13: 0000000000007000 R14: ffffea00019cd168 R15: ffff888027a0b680 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f54a22c2723 CR3: 000000001d013000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __extent_writepage fs/btrfs/extent_io.c:1446 [inline] extent_write_cache_pages fs/btrfs/extent_io.c:2108 [inline] extent_writepages+0x1260/0x26a0 fs/btrfs/extent_io.c:2230 do_writepages+0x3a6/0x670 mm/page-writeback.c:2553 __writeback_single_inode+0x155/0xfc0 fs/fs-writeback.c:1625 writeback_sb_inodes+0x8e3/0x1220 fs/fs-writeback.c:1916 wb_writeback+0x44d/0xc70 fs/fs-writeback.c:2092 wb_do_writeback fs/fs-writeback.c:2239 [inline] wb_workfn+0x400/0xfb0 fs/fs-writeback.c:2279 process_one_work kernel/workqueue.c:2627 [inline] process_scheduled_works+0x90f/0x1420 kernel/workqueue.c:2700 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2781 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__extent_writepage_io+0xcd5/0xd00 fs/btrfs/extent_io.c:1356 Code: 77 07 90 0f 0b e8 fb 23 f1 fd 48 c7 c7 80 c5 ab 8b 48 c7 c6 80 d2 ab 8b 48 c7 c2 20 c5 ab 8b b9 4c 05 00 00 e8 7c 49 77 07 90 <0f> 0b e8 d4 23 f1 fd 48 8b 3c 24 e8 db 22 01 00 48 89 c7 48 c7 c6 RSP: 0018:ffffc90000116f40 EFLAGS: 00010246 RAX: 000000000000004e RBX: 0000000000000000 RCX: 759e2408fa89b300 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: fffffffffffffffd R08: ffffffff81713a3c R09: 1ffff92000022d3c R10: dffffc0000000000 R11: fffff52000022d3d R12: 0000000000007000 R13: 0000000000007000 R14: ffffea00019cd168 R15: ffff888027a0b680 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fac72b5f000 CR3: 000000001d013000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.
