Re: [uclibc-ng-devel] CONFIG_UCLIBC_SUSV2_LEGACY triggers odd SIGSEGV in busybox's ash on MIPS

I think I've run into a rather odd bug on a big-endian MIPS platform while trying to hand-assemble a MIPS-II ISA netboot image built from a uclibc-ng chroot. In my netboot, I need to include xfsprogs, but this has a dependency on the 'valloc' function call. So in uclibc-ng, I enabled CONFIG_UCLIBC_SUSV2_LEGACY to enable that function, and rebuilt uclibc-ng. This fixes the xfsprogs build, but it very subtly breaks busybox's ash shell. After rebuilding uclibc-ng, then rebuilding busybox statically/multicall, if you run /bin/ash with a malformed argument or give it a script to execute that doesn't have the execute bit set, you get a SIGSEGV: Fudging up the argument syntax to /bin/ash: octane / # /bin/ash "-c" /bin/ash: -c requires an argument Segmentation fault Via a non-executable script "x.sh", we start with this sample: octane / # cat ./x.sh #!/bin/ash echo "foo!" If "x.sh" has the executable bit set, we're all good: octane / # ls -l ./x.sh -rwxr-xr-x 1 root root 24 Oct 12 01:57 ./x.sh octane / # /bin/ash -c ./x.sh foo! But if we turn off the executable bit... octane / # chmod -x ./x.sh octane / # ls -l ./x.sh -rw-r--r-- 1 root root 24 Oct 12 01:57 ./x.sh octane / # /bin/ash -c ./x.sh /bin/ash: ./x.sh: Permission denied Segmentation fault