general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 11696 Comm: syz-executor.4 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:_parse_integer_fixup_radix+0x60/0x290 lib/kstrtox.c:29 Code: 02 00 00 41 8b 2c 24 31 ff 89 ee e8 7a 50 77 fd 85 ed 75 62 e8 a1 53 77 fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 48 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 e2 01 00 00 RSP: 0018:ffffc90016647a40 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000c391000 RDX: 0000000000000000 RSI: ffffffff8405418f RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 000000000008c001 R12: ffffc90016647a90 R13: ffffc90016647bd8 R14: 000000007fffffff R15: ffff8880753b04d0 FS: 00007f17f21d7700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020003000 CR3: 000000001c1f3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: simple_strntoull+0x88/0x160 lib/vsprintf.c:68 memparse+0x72/0x180 lib/cmdline.c:154 shmem_parse_one+0x3fe/0xa60 mm/shmem.c:3472 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 shmem_parse_options+0x15f/0x240 mm/shmem.c:3570 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: 0033:0x7f17f148b5a9 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:00007f17f21d7168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f17f15abf80 RCX: 00007f17f148b5a9 RDX: 0000000020000280 RSI: 0000000020000240 RDI: 0000000000000000 RBP: 00007f17f14e67b0 R08: 0000000020002300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd996376ff R14: 00007f17f21d7300 R15: 0000000000022000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:_parse_integer_fixup_radix+0x60/0x290 lib/kstrtox.c:29 Code: 02 00 00 41 8b 2c 24 31 ff 89 ee e8 7a 50 77 fd 85 ed 75 62 e8 a1 53 77 fd 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 48 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 e2 01 00 00 RSP: 0018:ffffc90016647a40 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000c391000 RDX: 0000000000000000 RSI: ffffffff8405418f RDI: 0000000000000005 RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 000000000008c001 R12: ffffc90016647a90 R13: ffffc90016647bd8 R14: 000000007fffffff R15: ffff8880753b04d0 FS: 00007f17f21d7700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020b0a000 CR3: 000000001c1f3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 02 00 add (%rax),%al 2: 00 41 8b add %al,-0x75(%rcx) 5: 2c 24 sub $0x24,%al 7: 31 ff xor %edi,%edi 9: 89 ee mov %ebp,%esi b: e8 7a 50 77 fd callq 0xfd77508a 10: 85 ed test %ebp,%ebp 12: 75 62 jne 0x76 14: e8 a1 53 77 fd callq 0xfd7753ba 19: 48 89 da mov %rbx,%rdx 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 48 89 da mov %rbx,%rdx 31: 83 e2 07 and $0x7,%edx 34: 38 d0 cmp %dl,%al 36: 7f 08 jg 0x40 38: 84 c0 test %al,%al 3a: 0f 85 e2 01 00 00 jne 0x222