BTRFS warning (device loop2): failed to start uuid_rescan task
BTRFS warning (device loop2): failed to check the UUID tree: -4
------------[ cut here ]------------
gather_device_info: found more than 0 devices
WARNING: CPU: 2 PID: 20269 at fs/btrfs/volumes.c:4967 gather_device_info fs/btrfs/volumes.c:4967 [inline]
WARNING: CPU: 2 PID: 20269 at fs/btrfs/volumes.c:4967 btrfs_alloc_chunk+0x1a43/0x2000 fs/btrfs/volumes.c:5194
Kernel panic - not syncing: panic_on_warn set ...
CPU: 2 PID: 20269 Comm: syz-executor.0 Not tainted 5.9.0-rc5-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 panic+0x382/0x7fb kernel/panic.c:231
 __warn.cold+0x20/0x4b kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:gather_device_info fs/btrfs/volumes.c:4967 [inline]
RIP: 0010:btrfs_alloc_chunk+0x1a43/0x2000 fs/btrfs/volumes.c:5194
Code: ff ff 44 8b 7c 24 78 4c 89 0c 24 e8 17 06 67 fe 4c 8b 0c 24 48 c7 c6 c0 79 a6 88 48 c7 c7 40 67 a6 88 4c 89 ca e8 ff 41 37 fe <0f> 0b 4c 8b 0c 24 e9 f8 f0 ff ff 44 8b 7c 24 78 e8 e8 05 67 fe 31
RSP: 0018:ffffc90004806d40 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88801bfd2800 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815f5a85 RDI: fffff52000900d9a
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffff88802d0318e7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000002800000 R14: 0000000000010000 R15: 0000000000000001
 btrfs_chunk_alloc+0x3fe/0xaa0 fs/btrfs/block-group.c:3136
 find_free_extent_update_loop fs/btrfs/extent-tree.c:3796 [inline]
 find_free_extent+0x2090/0x2e60 fs/btrfs/extent-tree.c:4127
 btrfs_reserve_extent+0x166/0x460 fs/btrfs/extent-tree.c:4206
 btrfs_alloc_tree_block+0x203/0xee0 fs/btrfs/extent-tree.c:4603
 alloc_tree_block_no_bg_flush+0x1b6/0x250 fs/btrfs/ctree.c:987
 __btrfs_cow_block+0x3e0/0x10c0 fs/btrfs/ctree.c:1042
 btrfs_cow_block+0x2c1/0x8a0 fs/btrfs/ctree.c:1487
 commit_cowonly_roots+0x129/0xc70 fs/btrfs/transaction.c:1184
 btrfs_commit_transaction+0xde0/0x2830 fs/btrfs/transaction.c:2272
 btrfs_commit_super+0xc1/0x100 fs/btrfs/disk-io.c:4021
 close_ctree+0x2cd/0x6cb fs/btrfs/disk-io.c:4084
 open_ctree+0x4a0f/0x4a2c fs/btrfs/disk-io.c:3382
 btrfs_fill_super fs/btrfs/super.c:1316 [inline]
 btrfs_mount_root.cold+0x14/0x165 fs/btrfs/super.c:1672
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1547
 fc_mount fs/namespace.c:978 [inline]
 vfs_kern_mount.part.0+0xd3/0x170 fs/namespace.c:1008
 vfs_kern_mount+0x3c/0x60 fs/namespace.c:995
 btrfs_mount+0x234/0xaa0 fs/btrfs/super.c:1732
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1547
 do_new_mount fs/namespace.c:2875 [inline]
 path_mount+0x1387/0x20a0 fs/namespace.c:3192
 do_mount fs/namespace.c:3205 [inline]
 __do_sys_mount fs/namespace.c:3413 [inline]
 __se_sys_mount fs/namespace.c:3390 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3390
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e5ea
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 6d 9e fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 4a 9e fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007fe194339aa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe194339b40 RCX: 000000000045e5ea
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fe194339b00
RBP: 00007fe194339b00 R08: 00007fe194339b40 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 000000002001a800
Kernel Offset: disabled
Rebooting in 86400 seconds..