loop0: detected capacity change from 0 to 264192
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 3602 Comm: syz-executor230 Not tainted 6.1.0-rc1-next-20221021-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
RIP: 0010:strnlen+0x3b/0x70 lib/string.c:430
Code: 74 3c 48 bb 00 00 00 00 00 fc ff df 49 89 fc 48 89 f8 eb 09 48 83 c0 01 48 39 e8 74 1e 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 <0f> b6 14 1a 38 ca 7f 04 84 d2 75 11 80 38 00 75 d9 4c 29 e0 48 83
RSP: 0018:ffffc90003b6fb40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000
RBP: 0000000000000040 R08: 0000000000000005 R09: 0000000000000017
R10: 0000000000000002 R11: 000000000008c001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880217bf680 R15: ffff88807ccb24d0
FS: 0000555557389300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000005d84c8 CR3: 0000000026706000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
strnlen include/linux/fortify-string.h:186 [inline]
strscpy include/linux/fortify-string.h:331 [inline]
gfs2_parse_param+0x1e6/0xe50 fs/gfs2/ops_fstype.c:1455
vfs_parse_fs_param fs/fs_context.c:148 [inline]
vfs_parse_fs_param+0x1f9/0x3c0 fs/fs_context.c:129
vfs_parse_fs_string+0xdb/0x170 fs/fs_context.c:191
generic_parse_monolithic+0x16f/0x1f0 fs/fs_context.c:231
do_new_mount fs/namespace.c:3036 [inline]
path_mount+0x12de/0x1e20 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fdafa8bc4ba
Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe056c9ee8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fdafa8bc4ba
RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 00007ffe056c9f00
RBP: 00007ffe056c9f00 R08: 00007ffe056c9f40 R09: 00005555573892c0
R10: 000000000180c082 R11: 0000000000000282 R12: 0000000000000004
R13: 00007ffe056c9f40 R14: 0000000000000002 R15: 0000000020000330
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:strnlen+0x3b/0x70 lib/string.c:430
Code: 74 3c 48 bb 00 00 00 00 00 fc ff df 49 89 fc 48 89 f8 eb 09 48 83 c0 01 48 39 e8 74 1e 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 <0f> b6 14 1a 38 ca 7f 04 84 d2 75 11 80 38 00 75 d9 4c 29 e0 48 83
RSP: 0018:ffffc90003b6fb40 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000
RBP: 0000000000000040 R08: 0000000000000005 R09: 0000000000000017
R10: 0000000000000002 R11: 000000000008c001 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8880217bf680 R15: ffff88807ccb24d0
FS: 0000555557389300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000061ba0c CR3: 0000000026706000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 74 3c je 0x3e
2: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx
9: fc ff df
c: 49 89 fc mov %rdi,%r12
f: 48 89 f8 mov %rdi,%rax
12: eb 09 jmp 0x1d
14: 48 83 c0 01 add $0x1,%rax
18: 48 39 e8 cmp %rbp,%rax
1b: 74 1e je 0x3b
1d: 48 89 c2 mov %rax,%rdx
20: 48 89 c1 mov %rax,%rcx
23: 48 c1 ea 03 shr $0x3,%rdx
27: 83 e1 07 and $0x7,%ecx
* 2a: 0f b6 14 1a movzbl (%rdx,%rbx,1),%edx <-- trapping instruction
2e: 38 ca cmp %cl,%dl
30: 7f 04 jg 0x36
32: 84 d2 test %dl,%dl
34: 75 11 jne 0x47
36: 80 38 00 cmpb $0x0,(%rax)
39: 75 d9 jne 0x14
3b: 4c 29 e0 sub %r12,%rax
3e: 48 rex.W
3f: 83 .byte 0x83