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: 9636 Comm: syz-executor.0 Not tainted 5.15.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memchr+0x2f/0x70 lib/string.c:1070 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:ffffc900056b7d08 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000040000 RDX: 0000000000000001 RSI: 000000000000002c RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81e9c1a6 R09: ffffffff81e9bf42 R10: 0000000000000002 R11: ffff88809a863900 R12: dffffc0000000000 R13: 1ffff92000ad6fcc R14: 0000000000000000 R15: 000000000000002c FS: 00007f3e7ab08700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3e7d6905c8 CR3: 000000006b32d000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: legacy_parse_param+0x49b/0x810 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: 0033:0x7f3e7d592a39 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3e7ab08188 EFLAGS: 00000246 ORIG_RAX: 00000000000001af RAX: ffffffffffffffda RBX: 00007f3e7d695f60 RCX: 00007f3e7d592a39 RDX: 0000000020000080 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00007f3e7d5ece8f R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff82ace9df R14: 00007f3e7ab08300 R15: 0000000000022000 Modules linked in: ---[ end trace cfc1cf725eee75c6 ]--- RIP: 0010:memchr+0x2f/0x70 lib/string.c:1070 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:ffffc900056b7d08 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000040000 RDX: 0000000000000001 RSI: 000000000000002c RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81e9c1a6 R09: ffffffff81e9bf42 R10: 0000000000000002 R11: ffff88809a863900 R12: dffffc0000000000 R13: 1ffff92000ad6fcc R14: 0000000000000000 R15: 000000000000002c FS: 00007f3e7ab08700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f01f40394a8 CR3: 000000006b32d000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 ---------------- 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