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: 30297 Comm: syz-executor.4 Not tainted 5.17.0-rc4-syzkaller-00229-g4f12b742eb2b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:memchr+0x2f/0x70 lib/string.c:896
Code: 41 54 53 48 89 d3 41 89 f7 45 31 f6 49 bc 00 00 00 00 00 fc ff df 0f 1f 44 00 00 48 85 db 74 3b 48 89 fd 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 75 0f 48 ff cb 48 8d 7d 01 44 38 7d 00 75 db
RSP: 0018:ffffc9000fe67d10 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 000000000000000a RCX: dffffc0000000000
RDX: 000000000000000a RSI: 000000000000002c RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81ee7606 R09: ffffffff81ee738f
R10: 0000000000000002 R11: ffff88801d953a00 R12: dffffc0000000000
R13: 1ffff92001fccfcc R14: 0000000000000000 R15: 000000000000002c
FS:  00007f7468f0f700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001442 CR3: 000000007addb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 legacy_parse_param+0x4c4/0x8b0 fs/fs_context.c:555
 vfs_parse_fs_param+0x1df/0x460 fs/fs_context.c:146
 vfs_fsconfig_locked fs/fsopen.c:265 [inline]
 __do_sys_fsconfig fs/fsopen.c:439 [inline]
 __se_sys_fsconfig+0xba9/0xff0 fs/fsopen.c:314
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f746a59a059
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7468f0f168 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007f746a6acf60 RCX: 00007f746a59a059
RDX: 0000000020000180 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007f746a5f408d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020001440 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff1c07deff R14: 00007f7468f0f300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:memchr+0x2f/0x70 lib/string.c:896
Code: 41 54 53 48 89 d3 41 89 f7 45 31 f6 49 bc 00 00 00 00 00 fc ff df 0f 1f 44 00 00 48 85 db 74 3b 48 89 fd 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 75 0f 48 ff cb 48 8d 7d 01 44 38 7d 00 75 db
RSP: 0018:ffffc9000fe67d10 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 000000000000000a RCX: dffffc0000000000
RDX: 000000000000000a RSI: 000000000000002c RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff81ee7606 R09: ffffffff81ee738f
R10: 0000000000000002 R11: ffff88801d953a00 R12: dffffc0000000000
R13: 1ffff92001fccfcc R14: 0000000000000000 R15: 000000000000002c
FS:  00007f7468f0f700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b1df945448 CR3: 000000007addb000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	41 54                	push   %r12
   2:	53                   	push   %rbx
   3:	48 89 d3             	mov    %rdx,%rbx
   6:	41 89 f7             	mov    %esi,%r15d
   9:	45 31 f6             	xor    %r14d,%r14d
   c:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  13:	fc ff df
  16:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1b:	48 85 db             	test   %rbx,%rbx
  1e:	74 3b                	je     0x5b
  20:	48 89 fd             	mov    %rdi,%rbp
  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:	75 0f                	jne    0x42
  33:	48 ff cb             	dec    %rbx
  36:	48 8d 7d 01          	lea    0x1(%rbp),%rdi
  3a:	44 38 7d 00          	cmp    %r15b,0x0(%rbp)
  3e:	75 db                	jne    0x1b