Hello, syzbot found the following issue on: HEAD commit: 62fb9874 Linux 5.13 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12ffa118300000 kernel config: https://syzkaller.appspot.com/x/.config?x=19404adbea015a58 dashboard link: https://syzkaller.appspot.com/bug?extid=d1e3b1d92d25abf97943 compiler: Debian clang version 11.0.1-2 Unfortunately, I don't have any reproducer for this issue yet. IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d1e3b1d92d25abf97943@xxxxxxxxxxxxxxxxxxxxxxxxx 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: 20300 Comm: syz-executor.1 Not tainted 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:memchr+0x2f/0x70 lib/string.c:1054 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:ffffc90001dafd00 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000013 RCX: dffffc0000000000 RDX: 0000000000000013 RSI: 000000000000002c RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81e171bf R09: ffffffff81e16f95 R10: 0000000000000002 R11: ffff88807e96b880 R12: dffffc0000000000 R13: ffff888020894000 R14: 0000000000000000 R15: 000000000000002c FS: 00007fe01ae27700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000005645a8 CR3: 0000000018afc000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: legacy_parse_param+0x461/0x7e0 fs/fs_context.c:537 vfs_parse_fs_param+0x1e5/0x460 fs/fs_context.c:117 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_64+0x3f/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 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:00007fe01ae27188 EFLAGS: 00000246 ORIG_RAX: 00000000000001af RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 00000000200002c0 RSI: 0000000000000001 RDI: 0000000000000003 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000300 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd4bb7c5bf R14: 00007fe01ae27300 R15: 0000000000022000 Modules linked in: ---[ end trace 5d7119165725bd63 ]--- RIP: 0010:memchr+0x2f/0x70 lib/string.c:1054 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:ffffc90001dafd00 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000013 RCX: dffffc0000000000 RDX: 0000000000000013 RSI: 000000000000002c RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff81e171bf R09: ffffffff81e16f95 R10: 0000000000000002 R11: ffff88807e96b880 R12: dffffc0000000000 R13: ffff888020894000 R14: 0000000000000000 R15: 000000000000002c FS: 00007fe01ae27700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004e4da0 CR3: 0000000018afc000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
