RBP: 00000000009300a0 R08: 0000000020000600 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004d3228 R14: 00000000004c81cc R15: 0000000000000013 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN CPU: 0 PID: 6423 Comm: syz-executor0 Not tainted 4.19.0-rc2-next-20180904+ #55 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:p9_client_prepare_req.part.7+0x44f/0x870 net/9p/client.c:715 Code: ff 0f 87 29 fd ff ff e8 bf 00 d4 fa 0f be 85 a4 fe ff ff 4c 89 ea 48 c1 ea 03 89 85 a4 fe ff ff 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 4c 89 e8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 97 RSP: 0018:ffff8801208e71f0 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90001e7c000 RDX: 000000000000000b RSI: ffffffff86a8d5b1 RDI: 0000000000000286 RBP: ffff8801208e7368 R08: ffffed003b6046df R09: ffffed003b6046de R10: ffffed003b6046de R11: ffff8801db0236f3 R12: ffff8801c4e382c0 R13: 000000000000005e R14: 0000000000002000 R15: ffff8801c4e382f8 FS: 00007f398aa13700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000200 CR3: 00000001993b9000 CR4: 00000000001406f0 Call Trace: p9_client_prepare_req net/9p/client.c:747 [inline] p9_client_rpc+0x247/0x12c0 net/9p/client.c:747 p9_client_version net/9p/client.c:964 [inline] p9_client_create+0x9d6/0x1702 net/9p/client.c:1049 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 legacy_get_tree+0x131/0x460 fs/fs_context.c:732 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1746 do_new_mount fs/namespace.c:2627 [inline] do_mount+0x6f9/0x1e30 fs/namespace.c:2951 ksys_mount+0x12d/0x140 fs/namespace.c:3167 __do_sys_mount fs/namespace.c:3181 [inline] __se_sys_mount fs/namespace.c:3178 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3178 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f398aa12c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f398aa136d4 RCX: 0000000000457099 RDX: 0000000020000280 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 00000000009300a0 R08: 0000000020000600 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004d3228 R14: 00000000004c81cc R15: 0000000000000013 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 1025646aacaa1acf ]--- RIP: 0010:p9_client_prepare_req.part.7+0x44f/0x870 net/9p/client.c:715 Code: ff 0f 87 29 fd ff ff e8 bf 00 d4 fa 0f be 85 a4 fe ff ff 4c 89 ea 48 c1 ea 03 89 85 a4 fe ff ff 48 b8 00 00 00 00 00 fc ff df <0f> b6 14 02 4c 89 e8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 97 RSP: 0018:ffff8801208e71f0 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90001e7c000 RDX: 000000000000000b RSI: ffffffff86a8d5b1 RDI: 0000000000000286 RBP: ffff8801208e7368 R08: ffffed003b6046df R09: ffffed003b6046de R10: ffffed003b6046de R11: ffff8801db0236f3 R12: ffff8801c4e382c0 R13: 000000000000005e R14: 0000000000002000 R15: ffff8801c4e382f8 kworker/dying (54) used greatest stack depth: 8072 bytes left FS: 00007f398aa13700(0000) GS:ffff8801db000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000200 CR3: 00000001993b9000 CR4: 00000000001406f0