R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ------------[ cut here ]------------ kernel BUG at fs/btrfs/extent-tree.c:3291! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 9480 Comm: syz-executor.1 Not tainted 6.6.0-rc2-syzkaller-00143-gb5cbe7c00aa0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:btrfs_free_tree_block+0x788/0xb50 fs/btrfs/extent-tree.c:3291 Code: e8 dd 29 fe fd 31 ff 89 c5 89 c6 e8 b2 90 15 fe 40 84 ed 0f 85 e5 fb ff ff e8 74 95 15 fe 0f 0b e9 d9 fb ff ff e8 68 95 15 fe <0f> 0b e8 61 95 15 fe 49 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 RSP: 0018:ffffc9000791f188 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff88804bb6e1d8 RCX: ffffc90007691000 RDX: 0000000000040000 RSI: ffffffff83722f88 RDI: 0000000000000005 RBP: 0000000000000002 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000fffffff4 R11: 0000000038343954 R12: 1ffff92000f23e36 R13: ffff8880456ad738 R14: 0000000000000001 R15: ffff88804bb6e1e0 FS: 0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000f7fccb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7fcd000 CR3: 00000000760a8000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __btrfs_cow_block+0xfbd/0x18f0 fs/btrfs/ctree.c:601 btrfs_cow_block+0x2f1/0x820 fs/btrfs/ctree.c:712 btrfs_search_slot+0x12a0/0x30e0 fs/btrfs/ctree.c:2194 btrfs_insert_empty_items+0xb7/0x1b0 fs/btrfs/ctree.c:4376 btrfs_insert_empty_item fs/btrfs/ctree.h:636 [inline] alloc_reserved_file_extent+0x1a0/0x520 fs/btrfs/extent-tree.c:4630 run_delayed_data_ref fs/btrfs/extent-tree.c:1559 [inline] run_one_delayed_ref fs/btrfs/extent-tree.c:1744 [inline] btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:1986 [inline] __btrfs_run_delayed_refs+0x25cb/0x3b50 fs/btrfs/extent-tree.c:2047 btrfs_run_delayed_refs+0x1a1/0x510 fs/btrfs/extent-tree.c:2159 btrfs_commit_transaction+0x788/0x3b40 fs/btrfs/transaction.c:2185 btrfs_sync_fs+0x130/0x770 fs/btrfs/super.c:1228 sync_filesystem fs/sync.c:66 [inline] sync_filesystem+0x1c5/0x280 fs/sync.c:30 btrfs_remount+0x1ff/0x17b0 fs/btrfs/super.c:1696 legacy_reconfigure+0x119/0x180 fs/fs_context.c:661 reconfigure_super+0x44f/0xb10 fs/super.c:1140 do_remount fs/namespace.c:2882 [inline] path_mount+0x16f2/0x1ed0 fs/namespace.c:3654 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount fs/namespace.c:3861 [inline] __ia32_sys_mount+0x291/0x310 fs/namespace.c:3861 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] __do_fast_syscall_32+0x61/0xe0 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: 0023:0xf7ff2579 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:00000000f7fcc3f0 EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000100 RDX: 0000000020000180 RSI: 0000000001a404ac RDI: 00000000f7fcc4a0 RBP: 0000000020000180 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_free_tree_block+0x788/0xb50 fs/btrfs/extent-tree.c:3291 Code: e8 dd 29 fe fd 31 ff 89 c5 89 c6 e8 b2 90 15 fe 40 84 ed 0f 85 e5 fb ff ff e8 74 95 15 fe 0f 0b e9 d9 fb ff ff e8 68 95 15 fe <0f> 0b e8 61 95 15 fe 49 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 RSP: 0018:ffffc9000791f188 EFLAGS: 00010246 RAX: 0000000000040000 RBX: ffff88804bb6e1d8 RCX: ffffc90007691000 RDX: 0000000000040000 RSI: ffffffff83722f88 RDI: 0000000000000005 RBP: 0000000000000002 R08: 0000000000000005 R09: 0000000000000000 R10: 00000000fffffff4 R11: 0000000038343954 R12: 1ffff92000f23e36 R13: ffff8880456ad738 R14: 0000000000000001 R15: ffff88804bb6e1e0 FS: 0000000000000000(0000) GS:ffff88802c800000(0063) knlGS:00000000f7fccb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f7fcd000 CR3: 00000000760a8000 CR4: 0000000000350ee0 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 ret 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