From e5e86abc0e3d388e5e59834762e1446ad2e0030f Mon Sep 17 00:00:00 2001
From: Ilya Shipitsin <chipitsine@gmail.com>
Date: Sun, 21 Feb 2021 16:13:36 +0500
Subject: [PATCH] fix null pointer dereference found by ErrorSanitizer

(gdb) bt
0  0x00007f43857a5e14 in __GI___pthread_mutex_init (mutex=0x0, mutexattr=0x0) at pthread_mutex_init.c:89
1  0x00007f4385eaaf1b in UnixNewLock () at SoftEtherVPN/src/Mayaqua/Unix.c:1845
2  0x00007f4385e92331 in NewLockMain () at SoftEtherVPN/src/Mayaqua/Object.c:89
3  0x00007f4385e92359 in NewLock () at SoftEtherVPN/src/Mayaqua/Object.c:101
4  0x00007f4385e92765 in NewCounter () at SoftEtherVPN/src/Mayaqua/Object.c:171
5  0x00007f4385e92e76 in NewRef () at SoftEtherVPN/src/Mayaqua/Object.c:339
6  0x00007f4385e76939 in NewSkEx (no_compact=0) at SoftEtherVPN/src/Mayaqua/Memory.c:863
7  0x00007f4385e68c95 in NormalizePathW (
    dst=0x7ffe65932940 L"\xd6ff2ffb\xfbf14ce5\xad8669ca\x41998a9c\x5107d62d\x8d2ab3f2\x37ceaad2\xffc947ec\xad8ed8d8\x33e9f2f7\xc05723a9\x843263e3\x5516beb3\x12571e2a\xd81405f3\xf92194fe\xd807aa98\x12835b01\x243185be\x550c7dc3\xfd74170d\x12835b01\x553185be\x550c7dc3\x72be5d74\x80deb1fe\x9bdc06a7\xc19bf1f4\x72be5d74\x80deb1fe\x9bdc06a7\xc19bf174\x894d4018\xc54302b8\x145dc92\x143b3917\x62aa4fb8\x915764b1\xd5e11bef\x9d5fbc5\xb956c25b\x59f111f1\x923f82a4\xab1c5ed5\x3956c25b\x59f111f1\x923f82a4\xab1c5ed5\xbaeb40", size=2048, src=<optimized out>)
    at SoftEtherVPN/src/Mayaqua/FileIO.c:1960
8  0x00007f4385e69188 in ConbinePathW (
    dst=0x7ffe65932940 L"\xd6ff2ffb\xfbf14ce5\xad8669ca\x41998a9c\x5107d62d\x8d2ab3f2\x37ceaad2\xffc947ec\xad8ed8d8\x33e9f2f7\xc05723a9\x843263e3\x5516beb3\x12571e2a\xd81405f3\xf92194fe\xd807aa98\x12835b01\x243185be\x550c7dc3\xfd74170d\x12835b01\x553185be\x550c7dc3\x72be5d74\x80deb1fe\x9bdc06a7\xc19bf1f4\x72be5d74\x80deb1fe\x9bdc06a7\xc19bf174\x894d4018\xc54302b8\x145dc92\x143b3917\x62aa4fb8\x915764b1\xd5e11bef\x9d5fbc5\xb956c25b\x59f111f1\x923f82a4\xab1c5ed5\x3956c25b\x59f111f1\x923f82a4\xab1c5ed5\xbaeb40", size=2048,
    dirname=0xbace10 L"/root/.local/bin", filename=0x7ffe65932100 L"SoftEtherVPN/build/vpntest") at SoftEtherVPN/src/Mayaqua/FileIO.c:1686
9  0x00007f4385e6af48 in UnixGetExeNameW (name=0x7f4385ede820 <exe_file_name_w> L"/tmp/a.out", size=2048, arg=0xbb5050 L"./vpntest") at SoftEtherVPN/src/Mayaqua/FileIO.c:1401
10 0x00007f4385e6b04b in InitGetExeName (arg=<optimized out>) at SoftEtherVPN/src/Mayaqua/FileIO.c:1367
11 0x00007f4385e7470a in InitMayaqua (memcheck=memcheck@entry=0, debug=debug@entry=1, argc=argc@entry=3, argv=argv@entry=0x7ffe659340e8)
    at SoftEtherVPN/src/Mayaqua/Mayaqua.c:456
12 0x0000000000401282 in main (argc=3, argv=0x7ffe659340e8) at SoftEtherVPN/src/vpntest/vpntest.c:259
---
 src/Mayaqua/Unix.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/Mayaqua/Unix.c b/src/Mayaqua/Unix.c
index 37ac877d..0f1428f3 100755
--- a/src/Mayaqua/Unix.c
+++ b/src/Mayaqua/Unix.c
@@ -1840,6 +1840,10 @@ LOCK *UnixNewLock()
 
 	// Create a mutex
 	mutex = UnixMemoryAlloc(sizeof(pthread_mutex_t));
+	if (mutex == NULL)
+	{
+		return NULL;
+	}
 
 	// Initialization of the mutex
 	pthread_mutex_init(mutex, NULL);