netlink: 28 bytes leftover after parsing attributes in process `syz.0.0'. loop0: detected capacity change from 0 to 32768 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= 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: 5323 Comm: syz.0.0 Not tainted 6.12.0-rc5-syzkaller-00322-gb9021de3ec2f #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 be ad 0c fe e9 ba 06 00 00 e8 b4 ad 0c fe e9 4f 01 00 00 e8 aa ad 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:ffffc9000cfceb00 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000009 RCX: 0000000000040000 RDX: ffffc9000dc49000 RSI: 00000000000007c6 RDI: 0000000000000008 RBP: ffffc9000cfcf310 R08: ffffffff8387ff2b R09: ffffffff83885667 R10: 0000000000000002 R11: ffff888000f8a440 R12: dffffc0000000000 R13: ffff888050020878 R14: 00000000000001c0 R15: 0000000000000000 FS: 00007fd8b7abf6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9690395ed8 CR3: 000000004369c000 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_openat fs/open.c:1446 [inline] __se_sys_openat fs/open.c:1441 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1441 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: 0033:0x7fd8b6d7e719 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:00007fd8b7abf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fd8b6f35f80 RCX: 00007fd8b6d7e719 RDX: 0000000000105042 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00007fd8b6df132e R08: 0000000000000000 R09: 0000000000000000 R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd8b6f35f80 R15: 00007ffd8cdcc3e8 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 be ad 0c fe e9 ba 06 00 00 e8 b4 ad 0c fe e9 4f 01 00 00 e8 aa ad 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:ffffc9000cfceb00 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000009 RCX: 0000000000040000 RDX: ffffc9000dc49000 RSI: 00000000000007c6 RDI: 0000000000000008 RBP: ffffc9000cfcf310 R08: ffffffff8387ff2b R09: ffffffff83885667 R10: 0000000000000002 R11: ffff888000f8a440 R12: dffffc0000000000 R13: ffff888050020878 R14: 00000000000001c0 R15: 0000000000000000 FS: 00007fd8b7abf6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd8ac5bd000 CR3: 000000004369c000 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 be ad 0c fe call 0xfe0cadc5 7: e9 ba 06 00 00 jmp 0x6c6 c: e8 b4 ad 0c fe call 0xfe0cadc5 11: e9 4f 01 00 00 jmp 0x165 16: e8 aa ad 0c fe call 0xfe0cadc5 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