assertion failed: fs_info->exclusive_operation == BTRFS_EXCLOP_BALANCE || fs_info->exclusive_operation == BTRFS_EXCLOP_DEV_ADD, in fs/btrfs/ioctl.c:456 ------------[ cut here ]------------ kernel BUG at fs/btrfs/messages.c:259! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 6568 Comm: syz-executor.1 Not tainted 6.3.0-rc3-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 09 96 f8 fd 44 89 e9 4c 89 e2 48 89 ee 48 c7 c7 40 24 97 8a e8 04 a2 dc fd <0f> 0b 66 90 66 0f 1f 00 55 48 89 fd e8 e3 95 f8 fd 48 89 ef 5d 48 RSP: 0018:ffffc900067efbb0 EFLAGS: 00010286 RAX: 0000000000000097 RBX: 00000000fffffffe RCX: ffffc90007175000 RDX: 0000000000000000 RSI: ffffffff8167842c RDI: 0000000000000005 RBP: ffffffff8a95ab60 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 00000000000001e4 R12: ffffffff8a95a440 R13: 00000000000001c8 R14: ffff888024668680 R15: ffff88802466a0d0 FS: 0000000000000000(0000) GS:ffff88802cb00000(0063) knlGS:00000000f7f1eb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000c000af1dc0 CR3: 000000007583c000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: btrfs_exclop_balance fs/btrfs/ioctl.c:456 [inline] btrfs_ioctl_add_dev+0x41c/0x4b0 fs/btrfs/ioctl.c:2660 btrfs_ioctl+0x383b/0x5b10 fs/btrfs/ioctl.c:4574 __do_compat_sys_ioctl+0x255/0x2b0 fs/ioctl.c:968 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178 do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203 entry_SYSENTER_compat_after_hwframe+0x70/0x82 RIP: 0023:0xf7f65579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f7f1e5cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 000000005000940a RDX: 00000000200010c0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 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 09 96 f8 fd 44 89 e9 4c 89 e2 48 89 ee 48 c7 c7 40 24 97 8a e8 04 a2 dc fd <0f> 0b 66 90 66 0f 1f 00 55 48 89 fd e8 e3 95 f8 fd 48 89 ef 5d 48 RSP: 0018:ffffc900067efbb0 EFLAGS: 00010286 RAX: 0000000000000097 RBX: 00000000fffffffe RCX: ffffc90007175000 RDX: 0000000000000000 RSI: ffffffff8167842c RDI: 0000000000000005 RBP: ffffffff8a95ab60 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 00000000000001e4 R12: ffffffff8a95a440 R13: 00000000000001c8 R14: ffff888024668680 R15: ffff88802466a0d0 FS: 0000000000000000(0000) GS:ffff88802cb00000(0063) knlGS:00000000f7f1eb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 000000c000af1dc0 CR3: 000000007583c000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 retq 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi