There was a possible off-by-one in ld.so when loading shared libraries.

In some (rare?) cases, where the bss was too small and fit entirely into the
leftovers of the data segment we could map one extra page. This is slightly
dangerous on PMAP_PREFER machines where mmaps allocations do not happen
linearly in the virtual space and we could end up overwriting mappings
that are already in use.

This also changes the initial allocation from being a MAP_ANON to a
MAP_FILE so that we can pass the fd as a PMAP_PREFER hint.

0 files changed, 0 insertions, 0 deletions