[Bug dynamic-link/20831] _dl_map_segments does not test for __mprotect failures consistently

[ldv at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=20831

--- Comment #1 from Dmitry V. Levin <ldv at sourceware dot org> ---
Expected behavior:

$ strace -e mprotect -e fault=mprotect:when=1:error=ENOMEM cat </dev/null 
mprotect(0xf774e000, 4096, PROT_NONE)   = -1 ENOMEM (Cannot allocate memory)
(INJECTED)
/bin/cat: error while loading shared libraries: libc.so.6: cannot change memory
protections
+++ exited with 127 +++

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