An issue was discovered in Bento4 1.5.1.0. A memory allocation failure is unhandled in Core/Ap4SdpAtom.cpp and leads to crashes. When parsing input video, the program allocates a new buffer to parse an atom in the stream. The unhandled memory allocation failure causes a direct copy to a NULL pointer.
A memory allocation failure unhandled in Ap4SdpAtom.cpp and leads to crashes.

`./mp42aac input_file /dev/null`

In file Source/C++/Core/Ap4SdpAtom.cpp
<img width="640" alt="image" src="https://user-images.githubusercontent.com/7632714/58334121-73c1dd80-7e71-11e9-88a2-c9fbd2129068.png">

AP4_SdpAtom allocate a new buffer to parse the atom in the stream. 
The unhandled memory allocation failure cause the read content memcpy to a null pointer.
<img width="553" alt="image" src="https://user-images.githubusercontent.com/7632714/58333799-d23a8c00-7e70-11e9-9bc3-89b928919860.png">
This is the start points.

In file In file Source/C++/Core/Ap4ByteStream.cpp
![image](https://user-images.githubusercontent.com/7632714/58333856-ec746a00-7e70-11e9-9433-39bfc5eaecd1.png)
![image](https://user-images.githubusercontent.com/7632714/58333942-19288180-7e71-11e9-9483-a6682b51c009.png)

AP4_CopyMemory is the macro define of memcpy and the path formed.

Asan trace report:

> ==79431==AddressSanitizer CHECK failed: ../../../../../src/libsanitizer/sanitizer_common/sanitizer_allocator.cc:147 "((0)) != (0)" (0x0, 0x0)
    #0 0xf725e797  (/usr/lib32/libasan.so.2+0x9f797)
    #1 0xf7263a69 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) (/usr/lib32/libasan.so.2+0xa4a69)
    #2 0xf71d507b  (/usr/lib32/libasan.so.2+0x1607b)
    #3 0xf7261e80  (/usr/lib32/libasan.so.2+0xa2e80)
    #4 0xf71da229  (/usr/lib32/libasan.so.2+0x1b229)
    #5 0xf7256e16 in operator new[](unsigned int) (/usr/lib32/libasan.so.2+0x97e16)
    #6 0x873013b in AP4_SdpAtom::AP4_SdpAtom(unsigned int, AP4_ByteStream&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4SdpAtom.cpp:60
    #7 0x82dcab1 in AP4_SdpAtom::Create(unsigned int, AP4_ByteStream&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4SdpAtom.h:54
    #8 0x82dcab1 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, unsigned int, unsigned int, unsigned long long, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:595
    #9 0x83016d3 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, unsigned long long&, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:221
    #10 0x82b6bae in AP4_ContainerAtom::ReadChildren(AP4_AtomFactory&, AP4_ByteStream&, unsigned long long) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4ContainerAtom.cpp:194
    #11 0x82b6bae in AP4_ContainerAtom::AP4_ContainerAtom(unsigned int, unsigned long long, bool, AP4_ByteStream&, AP4_AtomFactory&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4ContainerAtom.cpp:139
    #12 0x82be680 in AP4_ContainerAtom::Create(unsigned int, unsigned long long, bool, bool, AP4_ByteStream&, AP4_AtomFactory&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4ContainerAtom.cpp:88
    #13 0x82dc711 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, unsigned int, unsigned int, unsigned long long, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:764
    #14 0x82fa1f7 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, unsigned long long&, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:221
    #15 0x82fa1f7 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:151
    #16 0x809a044 in AP4_File::ParseStream(AP4_ByteStream&, AP4_AtomFactory&, bool) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4File.cpp:104
    #17 0x809a044 in AP4_File::AP4_File(AP4_ByteStream&, bool) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4File.cpp:78
    #18 0x8082ce7 in main /mnt/data/playground/mp42-a/Source/C++/Apps/Mp42Aac/Mp42Aac.cpp:250
    #19 0xf69df636 in __libc_start_main (/lib/i386-linux-gnu/libc.so.6+0x18636)
    #20 0x808df1b  (/mnt/data/playground/mp42-a/Build/mp42aac+0x808df1b)

[input_file.zip](https://github.com/axiomatic-systems/Bento4/files/3217304/input_file.zip)

Exhaustive memory misunhandle
This is a GitHub Issue
repo:Bento4
owner:axiomatic-systems
Title : Exhaustive memory misunhandle
Issue date:

--- start body ---
A memory allocation failure unhandled in Ap4SdpAtom.cpp and leads to crashes.

`./mp42aac input_file /dev/null`

In file Source/C++/Core/Ap4SdpAtom.cpp
<img width="640" alt="image" src="https://user-images.githubusercontent.com/7632714/58334121-73c1dd80-7e71-11e9-88a2-c9fbd2129068.png">

AP4_SdpAtom allocate a new buffer to parse the atom in the stream. 
The unhandled memory allocation failure cause the read content memcpy to a null pointer.
<img width="553" alt="image" src="https://user-images.githubusercontent.com/7632714/58333799-d23a8c00-7e70-11e9-9bc3-89b928919860.png">
This is the start points.

In file In file Source/C++/Core/Ap4ByteStream.cpp
![image](https://user-images.githubusercontent.com/7632714/58333856-ec746a00-7e70-11e9-9433-39bfc5eaecd1.png)
![image](https://user-images.githubusercontent.com/7632714/58333942-19288180-7e71-11e9-9483-a6682b51c009.png)

AP4_CopyMemory is the macro define of memcpy and the path formed.

Asan trace report:

> ==79431==AddressSanitizer CHECK failed: ../../../../../src/libsanitizer/sanitizer_common/sanitizer_allocator.cc:147 "((0)) != (0)" (0x0, 0x0)
    #0 0xf725e797  (/usr/lib32/libasan.so.2+0x9f797)
    #1 0xf7263a69 in __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) (/usr/lib32/libasan.so.2+0xa4a69)
    #2 0xf71d507b  (/usr/lib32/libasan.so.2+0x1607b)
    #3 0xf7261e80  (/usr/lib32/libasan.so.2+0xa2e80)
    #4 0xf71da229  (/usr/lib32/libasan.so.2+0x1b229)
    #5 0xf7256e16 in operator new[](unsigned int) (/usr/lib32/libasan.so.2+0x97e16)
    #6 0x873013b in AP4_SdpAtom::AP4_SdpAtom(unsigned int, AP4_ByteStream&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4SdpAtom.cpp:60
    #7 0x82dcab1 in AP4_SdpAtom::Create(unsigned int, AP4_ByteStream&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4SdpAtom.h:54
    #8 0x82dcab1 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, unsigned int, unsigned int, unsigned long long, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:595
    #9 0x83016d3 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, unsigned long long&, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:221
    #10 0x82b6bae in AP4_ContainerAtom::ReadChildren(AP4_AtomFactory&, AP4_ByteStream&, unsigned long long) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4ContainerAtom.cpp:194
    #11 0x82b6bae in AP4_ContainerAtom::AP4_ContainerAtom(unsigned int, unsigned long long, bool, AP4_ByteStream&, AP4_AtomFactory&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4ContainerAtom.cpp:139
    #12 0x82be680 in AP4_ContainerAtom::Create(unsigned int, unsigned long long, bool, bool, AP4_ByteStream&, AP4_AtomFactory&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4ContainerAtom.cpp:88
    #13 0x82dc711 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, unsigned int, unsigned int, unsigned long long, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:764
    #14 0x82fa1f7 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, unsigned long long&, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:221
    #15 0x82fa1f7 in AP4_AtomFactory::CreateAtomFromStream(AP4_ByteStream&, AP4_Atom*&) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4AtomFactory.cpp:151
    #16 0x809a044 in AP4_File::ParseStream(AP4_ByteStream&, AP4_AtomFactory&, bool) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4File.cpp:104
    #17 0x809a044 in AP4_File::AP4_File(AP4_ByteStream&, bool) /mnt/data/playground/mp42-a/Source/C++/Core/Ap4File.cpp:78
    #18 0x8082ce7 in main /mnt/data/playground/mp42-a/Source/C++/Apps/Mp42Aac/Mp42Aac.cpp:250
    #19 0xf69df636 in __libc_start_main (/lib/i386-linux-gnu/libc.so.6+0x18636)
    #20 0x808df1b  (/mnt/data/playground/mp42-a/Build/mp42aac+0x808df1b)

[input_file.zip](https://github.com/axiomatic-systems/Bento4/files/3217304/input_file.zip)

--- end body ---
