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authorSiddhesh Poyarekar <siddhesh@sourceware.org>2017-01-20 00:45:09 +0530
committerSiddhesh Poyarekar <siddhesh@sourceware.org>2017-01-20 00:45:09 +0530
commit41389c40499a083c59e68ba281ec87be567f2871 (patch)
tree4d5ff86fc8a5216850383149fbe35944c32adb69 /posix
parent3a66b2b0637e439fb0e7a14c6c3d4c58190eec61 (diff)
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Fix environment traversal when an envvar value is empty
The condition when the value of an envvar is empty (not just '\0'), the loop in tunables_init gets stuck infinitely because envp is not incremented. Fix that by always incrementing envp in the loop. Added test case (tst-empty-env.c) verifies the fix when the source is configured with --enable-hardcoded-path-in-tests, thanks Josh Stone for providing the test case. Verified on x86_64. * elf/dl-tunables (get_next_env): Always advance envp. * stdlib/tst-empty-env.c: New test case. * stdlib/Makefile (tests): Use it.
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