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lockedpool: When possible, use madvise to avoid including sensitive information in core dumps

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This commit is contained in:
Luke Dashjr 2019-03-14 13:36:24 +00:00
parent 8a9ffec0a2
commit d831831822
1 changed files with 3 additions and 0 deletions
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3
src/support/lockedpool.cpp
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@ -250,6 +250,9 @@ void *PosixLockedPageAllocator::AllocateLocked(size_t len, bool *lockingSuccess)
addr = mmap(nullptr, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0); addr = mmap(nullptr, len, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
if (addr) { if (addr) {
*lockingSuccess = mlock(addr, len) == 0; *lockingSuccess = mlock(addr, len) == 0;
#ifdef MADV_DONTDUMP
madvise(addr, len, MADV_DONTDUMP);
#endif
} }
return addr; return addr;
} }