RBP: 00000000009300a0 R08: 0000000020000200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016 R13: 00000000004d1750 R14: 00000000004c6e7f R15: 0000000000000018 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: 1 PID: 10433 Comm: syz-executor2 Not tainted 4.18.0-rc6-next-20180725+ #18 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:p9_client_prepare_req.part.8+0x392/0xa00 net/9p/client.c:652 Code: ff 0f 87 6a 02 00 00 e8 6c 8b f4 fa 0f be 85 f4 fe ff ff 4c 89 f2 48 c1 ea 03 89 85 f4 fe ff ff 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 0f 85 89 05 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b RSP: 0018:ffff8801b4fc7248 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90001df4000 RDX: 000000000000000a RSI: ffffffff86881c94 RDI: ffff8801c9a58cb8 RBP: ffff8801b4fc7378 R08: ffff8801d7cac280 R09: fffffbfff10057c6 R10: fffffbfff10057c6 R11: ffffffff8802be33 R12: ffff8801c9a58c80 R13: 0000000000002000 R14: 0000000000000050 R15: ffff8801c9a58cbc FS: 00007f44fbf8e700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020f00000 CR3: 000000018d9f6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: p9_client_prepare_req net/9p/client.c:682 [inline] p9_client_rpc+0x247/0x1420 net/9p/client.c:682 p9_client_version net/9p/client.c:897 [inline] p9_client_create+0xd76/0x1631 net/9p/client.c:981 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:674 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1762 do_new_mount fs/namespace.c:2629 [inline] do_mount+0x6f2/0x1e20 fs/namespace.c:2953 ksys_mount+0x12d/0x140 fs/namespace.c:3169 __do_sys_mount fs/namespace.c:3183 [inline] __se_sys_mount fs/namespace.c:3180 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3180 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x456a09 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:00007f44fbf8dc78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f44fbf8e6d4 RCX: 0000000000456a09 RDX: 0000000020000900 RSI: 0000000020000080 RDI: 0000000020f00000 RBP: 00000000009300a0 R08: 0000000020000200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016 R13: 00000000004d1750 R14: 00000000004c6e7f R15: 0000000000000018 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 7625b4612e68cc5b ]--- RIP: 0010:p9_client_prepare_req.part.8+0x392/0xa00 net/9p/client.c:652 Code: ff 0f 87 6a 02 00 00 e8 6c 8b f4 fa 0f be 85 f4 fe ff ff 4c 89 f2 48 c1 ea 03 89 85 f4 fe ff ff 48 b8 00 00 00 00 00 fc ff df <80> 3c 02 00 0f 85 89 05 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b RSP: 0018:ffff8801b4fc7248 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90001df4000 RDX: 000000000000000a RSI: ffffffff86881c94 RDI: ffff8801c9a58cb8 RBP: ffff8801b4fc7378 R08: ffff8801d7cac280 R09: fffffbfff10057c6 R10: fffffbfff10057c6 R11: ffffffff8802be33 R12: ffff8801c9a58c80 R13: 0000000000002000 R14: 0000000000000050 R15: ffff8801c9a58cbc FS: 00007f44fbf8e700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020f00000 CR3: 000000018d9f6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400