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* CVE-2018-1000030-1 [2.7] bpo-31530: Stop crashes when iterating over a file on multiple threads * CVE-2018-1000030-2 Multiple threads iterating over a file can corrupt the file's internal readahead buffer resulting in crashes. To fix this, cache buffer state thread-locally for the duration of a file_iternext call and only update the file's internal state after reading completes. No attempt is made to define or provide "reasonable" semantics for iterating over a file on multiple threads. (Non-crashing) races are still present. Duplicated, corrupt, and missing data will happen. This was originally fixed by 6401e56, which raised an exception from seek() and next() when concurrent operations were detected. Alas, this simpler solution breaks legitimate use cases such as capturing the standard streams when multiple threads are logging. Affects python <= 2.7.14 (From OE-Core rev: 4b6c84e0f950f839bfb8c40f197197f838d8b733) Signed-off-by: Jagadeesh Krishnanjanappa <jkrishnanjanappa@mvista.com> Signed-off-by: Armin Kuster <akuster808@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
QEMU Emulation Targets ====================== To simplify development, the build system supports building images to work with the QEMU emulator in system emulation mode. Several architectures are currently supported in 32 and 64 bit variants: * ARM (qemuarm + qemuarm64) * x86 (qemux86 + qemux86-64) * PowerPC (qemuppc only) * MIPS (qemumips + qemumips64) Use of the QEMU images is covered in the Yocto Project Reference Manual. The appropriate MACHINE variable value corresponding to the target is given in brackets.