loop0: detected capacity change from 0 to 32768 (syz.0.0,5327,0):ocfs2_parse_options:1448 ERROR: Unrecognized mount option "er2ors=remount-ro" or missing value (syz.0.0,5327,0):ocfs2_fill_super:1178 ERROR: status = -22 JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Not tainted 6.12.0-rc7-syzkaller-00216-gf66d6acccbc0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:ocfs2_find_dir_space_id fs/ocfs2/dir.c:3407 [inline] RIP: 0010:ocfs2_prepare_dir_for_insert+0x3305/0x5c60 fs/ocfs2/dir.c:4271 Code: 00 00 e8 4e 84 0c fe e9 ba 06 00 00 e8 44 84 0c fe e9 4f 01 00 00 e8 3a 84 0c fe 49 8d 7f 08 49 8d 5f 09 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 bd 23 00 00 48 89 d8 48 c1 e8 03 42 0f RSP: 0018:ffffc9000d416b20 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000009 RCX: 0000000000040000 RDX: ffffc9000d751000 RSI: 0000000000000822 RDI: 0000000000000008 RBP: ffffc9000d417330 R08: ffffffff8388390b R09: ffffffff83889047 R10: 0000000000000002 R11: ffff88800012a440 R12: dffffc0000000000 R13: ffff888043f98878 R14: fffc000000000088 R15: 0000000000000000 FS: 00007f68ed9746c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f68e29ff000 CR3: 000000003b740000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ocfs2_mknod+0xcaf/0x2b40 fs/ocfs2/namei.c:292 ocfs2_create+0x1ab/0x480 fs/ocfs2/namei.c:672 lookup_open fs/namei.c:3595 [inline] open_last_lookups fs/namei.c:3694 [inline] path_openat+0x1c03/0x3590 fs/namei.c:3930 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_creat fs/open.c:1508 [inline] __se_sys_creat fs/open.c:1502 [inline] __x64_sys_creat+0x123/0x170 fs/open.c:1502 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f68ecb7e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f68ed974038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007f68ecd35f80 RCX: 00007f68ecb7e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 00007f68ecbf175e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f68ecd35f80 R15: 00007fffb498e7d8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_find_dir_space_id fs/ocfs2/dir.c:3407 [inline] RIP: 0010:ocfs2_prepare_dir_for_insert+0x3305/0x5c60 fs/ocfs2/dir.c:4271 Code: 00 00 e8 4e 84 0c fe e9 ba 06 00 00 e8 44 84 0c fe e9 4f 01 00 00 e8 3a 84 0c fe 49 8d 7f 08 49 8d 5f 09 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 bd 23 00 00 48 89 d8 48 c1 e8 03 42 0f RSP: 0018:ffffc9000d416b20 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000009 RCX: 0000000000040000 RDX: ffffc9000d751000 RSI: 0000000000000822 RDI: 0000000000000008 RBP: ffffc9000d417330 R08: ffffffff8388390b R09: ffffffff83889047 R10: 0000000000000002 R11: ffff88800012a440 R12: dffffc0000000000 R13: ffff888043f98878 R14: fffc000000000088 R15: 0000000000000000 FS: 00007f68ed9746c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020003000 CR3: 000000003b740000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: e8 4e 84 0c fe call 0xfe0c8455 7: e9 ba 06 00 00 jmp 0x6c6 c: e8 44 84 0c fe call 0xfe0c8455 11: e9 4f 01 00 00 jmp 0x165 16: e8 3a 84 0c fe call 0xfe0c8455 1b: 49 8d 7f 08 lea 0x8(%r15),%rdi 1f: 49 8d 5f 09 lea 0x9(%r15),%rbx 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 bd 23 00 00 jne 0x23f4 37: 48 89 d8 mov %rbx,%rax 3a: 48 c1 e8 03 shr $0x3,%rax 3e: 42 rex.X 3f: 0f .byte 0xf