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| author | Florian Weimer <fweimer@redhat.com> | 2022-04-26 14:23:02 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2022-04-26 14:24:36 +0200 |
| commit | 8dcb6d0af07fda3607b541857e4f3970a74ed55b (patch) | |
| tree | 06a15719ac286241c9faf9bfd4a802d57ee08bc8 /dlfcn/dlsym.c | |
| parent | c935789bdf40ba22b5698da869d3a4789797e09f (diff) | |
| download | glibc-8dcb6d0af07fda3607b541857e4f3970a74ed55b.zip glibc-8dcb6d0af07fda3607b541857e4f3970a74ed55b.tar.gz glibc-8dcb6d0af07fda3607b541857e4f3970a74ed55b.tar.bz2 | |
dlfcn: Do not use rtld_active () to determine ld.so state (bug 29078)
When audit modules are loaded, ld.so initialization is not yet
complete, and rtld_active () returns false even though ld.so is
mostly working. Instead, the static dlopen hook is used, but that
does not work at all because this is not a static dlopen situation.
Commit 466c1ea15f461edb8e3ffaf5d86d708876343bbf ("dlfcn: Rework
static dlopen hooks") moved the hook pointer into _rtld_global_ro,
which means that separate protection is not needed anymore and the
hook pointer can be checked directly.
The guard for disabling libio vtable hardening in _IO_vtable_check
should stay for now.
Fixes commit 8e1472d2c1e25e6eabc2059170731365f6d5b3d1 ("ld.so:
Examine GLRO to detect inactive loader [BZ #20204]").
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'dlfcn/dlsym.c')
| -rw-r--r-- | dlfcn/dlsym.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/dlfcn/dlsym.c b/dlfcn/dlsym.c index a71f8ae..2e9ff98 100644 --- a/dlfcn/dlsym.c +++ b/dlfcn/dlsym.c @@ -62,7 +62,7 @@ dlsym_implementation (void *handle, const char *name, void *dl_caller) void * ___dlsym (void *handle, const char *name) { - if (!rtld_active ()) + if (GLRO (dl_dlfcn_hook) != NULL) return GLRO (dl_dlfcn_hook)->dlsym (handle, name, RETURN_ADDRESS (0)); else return dlsym_implementation (handle, name, RETURN_ADDRESS (0)); |