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| author | Ulrich Drepper <drepper@redhat.com> | 2005-02-07 23:52:23 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2005-02-07 23:52:23 +0000 |
| commit | ecc1d0c301d97bdd540ff8d414a2eb4dcae51ea0 (patch) | |
| tree | 25bf997247ab51a685f81445eca219026f7877bd /elf/dl-load.c | |
| parent | 16cc1800298a4369111b7cba2c755dab3c969a98 (diff) | |
| download | glibc-ecc1d0c301d97bdd540ff8d414a2eb4dcae51ea0.tar.gz glibc-ecc1d0c301d97bdd540ff8d414a2eb4dcae51ea0.tar.xz glibc-ecc1d0c301d97bdd540ff8d414a2eb4dcae51ea0.zip | |
* elf/dl-load.c (open_path): If rtld_search_dirs is in RELRO segment,
avoid writing to it if none of the standard search directories exist.
Diffstat (limited to 'elf/dl-load.c')
| -rw-r--r-- | elf/dl-load.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/elf/dl-load.c b/elf/dl-load.c index f74f98f91e..03b7f0b4ee 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -105,13 +105,11 @@ ELF_PREFERRED_ADDRESS_DATA; int __stack_prot attribute_hidden attribute_relro - = (PROT_READ|PROT_WRITE #if _STACK_GROWS_DOWN && defined PROT_GROWSDOWN - |PROT_GROWSDOWN + = PROT_GROWSDOWN; #elif _STACK_GROWS_UP && defined PROT_GROWSUP - |PROT_GROWSUP + = PROT_GROWSUP; #endif - ); /* Type for the buffer we put the ELF header and hopefully the program @@ -1368,12 +1366,12 @@ cannot allocate TLS data structures for initial thread"); if (__builtin_expect (__check_caller (RETURN_ADDRESS (0), allow_ldso) == 0, 0)) - __stack_prot |= PROT_EXEC; + __stack_prot |= PROT_READ|PROT_WRITE|PROT_EXEC; __mprotect ((void *) p, s, PROT_READ); } else #endif - __stack_prot |= PROT_EXEC; + __stack_prot |= PROT_READ|PROT_WRITE|PROT_EXEC; errval = (*GL(dl_make_stack_executable_hook)) (stack_endp); if (errval) @@ -1876,7 +1874,12 @@ open_path (const char *name, size_t namelen, int preloaded, must not be freed using the general free() in libc. */ if (sps->malloced) free (sps->dirs); - sps->dirs = (void *) -1; +#ifdef HAVE_Z_RELRO + /* rtld_search_dirs is attribute_relro, therefore avoid writing + into it. */ + if (sps != &rtld_search_dirs) +#endif + sps->dirs = (void *) -1; } return -1; |