Siddhesh Poyarekar
ed8d5ffd0a
Drop GLIBC_TUNABLES for setxid programs when tunables is disabled (bz #21073 ) ...
A setxid program that uses a glibc with tunables disabled may pass on
GLIBC_TUNABLES as is to its child processes. If the child process
ends up using a different glibc that has tunables enabled, it will end
up getting access to unsafe tunables. To fix this, remove
GLIBC_TUNABLES from the environment for setxid process.
* sysdeps/generic/unsecvars.h: Add GLIBC_TUNABLES.
* elf/tst-env-setuid-tunables.c
(test_child_tunables)[!HAVE_TUNABLES]: Verify that
GLIBC_TUNABLES is removed in a setgid process.
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ed8d5ffd0a