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lockedpool: avoid sensitive data in core files (FreeBSD)

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This is a followup to
23991ee53 / https://github.com/bitcoin/bitcoin/pull/15600
to also use madvise(2) on FreeBSD to avoid sensitive data allocated
with secure_allocator ending up in core files in addition to preventing
it from going to the swap.
This commit is contained in:
Vasil Dimov 2020-03-26 20:43:17 +01:00
parent 7f9dedb22d
commit f85203097f
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1 changed files with 3 additions and 1 deletions
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4
src/support/lockedpool.cpp
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@ -253,8 +253,10 @@ void *PosixLockedPageAllocator::AllocateLocked(size_t len, bool *lockingSuccess)
} }
if (addr) { if (addr) {
*lockingSuccess = mlock(addr, len) == 0; *lockingSuccess = mlock(addr, len) == 0;
#ifdef MADV_DONTDUMP #if defined(MADV_DONTDUMP) // Linux
madvise(addr, len, MADV_DONTDUMP); madvise(addr, len, MADV_DONTDUMP);
#elif defined(MADV_NOCORE) // FreeBSD
madvise(addr, len, MADV_NOCORE);
#endif #endif
} }
return addr; return addr;