Fix leaking /proc/self/mem of a new process after execve. #11992
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memFD is linked with the Task instead of MemoryManager. At the time of read/write, it uses Task's MemoryManager. However, it should have used Task's MemoryManager from the time when we do open. To fix it, we store the MemoryManager at the time of opening /proc/self/mem. Added the reproducer as a test. PiperOrigin-RevId: 791327639
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Fix leaking /proc/self/mem of a new process after execve.
memFD is linked with the Task instead of MemoryManager. At the time of
read/write, it uses Task's MemoryManager. However, it should have used Task's
MemoryManager from the time when we do open. To fix it, we store the
MemoryManager at the time of opening /proc/self/mem.
Added the reproducer as a test.