syz.0.0 uses obsolete (PF_INET,SOCK_PACKET) loop0: detected capacity change from 0 to 32768 BTRFS: device fsid a6a605fc-d5f1-4e66-8595-3726e2b761d6 devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5314) BTRFS info (device loop0): first mount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6 BTRFS info (device loop0): using blake2b (blake2b-256-generic) checksum algorithm BTRFS info (device loop0): using free-space-tree Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted 6.15.0-syzkaller-10402-g4cb6c8af8591 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:btrfs_root_node+0x7f/0x3b0 fs/btrfs/ctree.c:193 Code: d7 bb e1 fd 48 83 c4 08 e8 ae 2e a7 07 89 c5 31 ff 89 c6 e8 03 d7 03 fe 85 ed 74 17 e8 6a aa ea fd 84 c0 74 1c e8 b1 d2 03 fe <42> 80 3c 2b 00 75 4b eb 51 e8 a3 d2 03 fe 42 80 3c 2b 00 75 3d eb RSP: 0000:ffffc9000d58f710 EFLAGS: 00010283 RAX: ffffffff83bc6e9f RBX: 0000000000000003 RCX: 0000000000100000 RDX: ffffc9000e262000 RSI: 0000000000016dd2 RDI: 0000000000016dd3 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff83bc6e5c R10: dffffc0000000000 R11: ffffed10075eb00e R12: ffffffff83bc6e5c R13: dffffc0000000000 R14: 0000000000000018 R15: 0000000000000000 FS: 00007f93c03f56c0(0000) GS:ffff88808d265000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f59cdb52880 CR3: 0000000042943000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: btrfs_read_lock_root_node+0x27/0xd0 fs/btrfs/locking.c:263 btrfs_build_ref_tree+0x110/0x13e0 fs/btrfs/ref-verify.c:1006 open_ctree+0x1d81/0x2800 fs/btrfs/disk-io.c:3594 btrfs_fill_super+0x19d/0x2e0 fs/btrfs/super.c:968 btrfs_get_tree_super fs/btrfs/super.c:1893 [inline] btrfs_get_tree+0x107c/0x1630 fs/btrfs/super.c:2088 vfs_get_tree+0x8f/0x2b0 fs/super.c:1802 fc_mount+0x1c/0xb0 fs/namespace.c:1290 btrfs_get_tree_subvol fs/btrfs/super.c:2046 [inline] btrfs_get_tree+0x67d/0x1630 fs/btrfs/super.c:2089 vfs_get_tree+0x8f/0x2b0 fs/super.c:1802 do_new_mount+0x24a/0xa40 fs/namespace.c:3856 do_mount fs/namespace.c:4193 [inline] __do_sys_mount fs/namespace.c:4404 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4381 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f93c3f9010a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f93c03f4e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f93c03f4ef0 RCX: 00007f93c3f9010a RDX: 0000200000000080 RSI: 0000200000000040 RDI: 00007f93c03f4eb0 RBP: 0000200000000080 R08: 00007f93c03f4ef0 R09: 000000000001c005 R10: 000000000001c005 R11: 0000000000000246 R12: 0000200000000040 R13: 00007f93c03f4eb0 R14: 00000000000055cb R15: 00002000000000c0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_root_node+0x7f/0x3b0 fs/btrfs/ctree.c:193 Code: d7 bb e1 fd 48 83 c4 08 e8 ae 2e a7 07 89 c5 31 ff 89 c6 e8 03 d7 03 fe 85 ed 74 17 e8 6a aa ea fd 84 c0 74 1c e8 b1 d2 03 fe <42> 80 3c 2b 00 75 4b eb 51 e8 a3 d2 03 fe 42 80 3c 2b 00 75 3d eb RSP: 0000:ffffc9000d58f710 EFLAGS: 00010283 RAX: ffffffff83bc6e9f RBX: 0000000000000003 RCX: 0000000000100000 RDX: ffffc9000e262000 RSI: 0000000000016dd2 RDI: 0000000000016dd3 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff83bc6e5c R10: dffffc0000000000 R11: ffffed10075eb00e R12: ffffffff83bc6e5c R13: dffffc0000000000 R14: 0000000000000018 R15: 0000000000000000 FS: 00007f93c03f56c0(0000) GS:ffff88808d265000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c2ef130910 CR3: 0000000042943000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: e1 fd loope 0xffffffff 2: 48 83 c4 08 add $0x8,%rsp 6: e8 ae 2e a7 07 call 0x7a72eb9 b: 89 c5 mov %eax,%ebp d: 31 ff xor %edi,%edi f: 89 c6 mov %eax,%esi 11: e8 03 d7 03 fe call 0xfe03d719 16: 85 ed test %ebp,%ebp 18: 74 17 je 0x31 1a: e8 6a aa ea fd call 0xfdeaaa89 1f: 84 c0 test %al,%al 21: 74 1c je 0x3f 23: e8 b1 d2 03 fe call 0xfe03d2d9 * 28: 42 80 3c 2b 00 cmpb $0x0,(%rbx,%r13,1) <-- trapping instruction 2d: 75 4b jne 0x7a 2f: eb 51 jmp 0x82 31: e8 a3 d2 03 fe call 0xfe03d2d9 36: 42 80 3c 2b 00 cmpb $0x0,(%rbx,%r13,1) 3b: 75 3d jne 0x7a 3d: eb .byte 0xeb