BTRFS warning (device loop0): couldn't read tree root assertion failed: !tmp, in fs/btrfs/disk-io.c:1002 ------------[ cut here ]------------ kernel BUG at fs/btrfs/messages.c:259! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 27751 Comm: syz-executor.0 Not tainted 6.3.0-rc7-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:btrfs_assertfail+0x2c/0x30 fs/btrfs/messages.c:259 Code: 1f 00 41 55 41 89 d5 41 54 49 89 f4 55 48 89 fd e8 d9 5c f9 fd 44 89 e9 4c 89 e2 48 89 ee 48 c7 c7 40 f6 96 8a e8 a4 57 dd fd <0f> 0b 66 90 66 0f 1f 00 55 48 89 fd e8 b3 5c f9 fd 48 89 ef 5d 48 RSP: 0018:ffffc900279cf678 EFLAGS: 00010282 RAX: 0000000000000032 RBX: 0000000000000000 RCX: ffffc90007091000 RDX: 0000000000000000 RSI: ffffffff81669a0c RDI: 0000000000000005 RBP: ffffffff8a943f20 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8a942f60 R13: 00000000000003ea R14: dffffc0000000000 R15: ffff8880750cc060 FS: 00007faeeaa6c700(0000) GS:ffff88802c800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020002000 CR3: 000000007490c000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: btrfs_global_root_insert+0x1fd/0x260 fs/btrfs/disk-io.c:1002 load_global_roots_objectid+0x12e/0x7e0 fs/btrfs/disk-io.c:2385 load_global_roots fs/btrfs/disk-io.c:2419 [inline] btrfs_read_roots fs/btrfs/disk-io.c:2446 [inline] init_tree_roots fs/btrfs/disk-io.c:2869 [inline] open_ctree+0x22bb/0x5410 fs/btrfs/disk-io.c:3565 btrfs_fill_super fs/btrfs/super.c:1152 [inline] btrfs_mount_root+0xa0c/0xd30 fs/btrfs/super.c:1519 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1510 fc_mount fs/namespace.c:1035 [inline] vfs_kern_mount.part.0+0xd3/0x170 fs/namespace.c:1065 vfs_kern_mount+0x40/0x60 fs/namespace.c:1052 btrfs_mount+0x23f/0xb20 fs/btrfs/super.c:1579 legacy_get_tree+0x109/0x220 fs/fs_context.c:610 vfs_get_tree+0x8d/0x350 fs/super.c:1510 do_new_mount fs/namespace.c:3042 [inline] path_mount+0x1342/0x1e40 fs/namespace.c:3372 do_mount fs/namespace.c:3385 [inline] __do_sys_mount fs/namespace.c:3594 [inline] __se_sys_mount fs/namespace.c:3571 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3571 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7faee9c8d69a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faeeaa6bf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000005106 RCX: 00007faee9c8d69a RDX: 0000000020005100 RSI: 0000000020005140 RDI: 00007faeeaa6bfe0 RBP: 00007faeeaa6c020 R08: 00007faeeaa6c020 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020005100 R13: 0000000020005140 R14: 00007faeeaa6bfe0 R15: 0000000020001180 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_assertfail+0x2c/0x30 fs/btrfs/messages.c:259 Code: 1f 00 41 55 41 89 d5 41 54 49 89 f4 55 48 89 fd e8 d9 5c f9 fd 44 89 e9 4c 89 e2 48 89 ee 48 c7 c7 40 f6 96 8a e8 a4 57 dd fd <0f> 0b 66 90 66 0f 1f 00 55 48 89 fd e8 b3 5c f9 fd 48 89 ef 5d 48 RSP: 0018:ffffc900279cf678 EFLAGS: 00010282 RAX: 0000000000000032 RBX: 0000000000000000 RCX: ffffc90007091000 RDX: 0000000000000000 RSI: ffffffff81669a0c RDI: 0000000000000005 RBP: ffffffff8a943f20 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8a942f60 R13: 00000000000003ea R14: dffffc0000000000 R15: ffff8880750cc060 FS: 00007faeeaa6c700(0000) GS:ffff88802c800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faee9c89850 CR3: 000000007490c000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400