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| author | Florian Weimer <fweimer@redhat.com> | 2021-04-21 19:49:51 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2021-04-21 19:49:51 +0200 |
| commit | b2964eb1d9a6b8ab1250e8a881cf406182da5875 (patch) | |
| tree | 8da8c68905e8f616ed24b0357032409f33231724 /elf/rtld.c | |
| parent | 66d99dc53a9aa2bbc7e8d7dd3ba3507d5ffe8597 (diff) | |
| download | glibc-b2964eb1d9a6b8ab1250e8a881cf406182da5875.tar.gz glibc-b2964eb1d9a6b8ab1250e8a881cf406182da5875.tar.xz glibc-b2964eb1d9a6b8ab1250e8a881cf406182da5875.zip | |
dlfcn: Failures after dlmopen should not terminate process [BZ #24772]
Commit 9e78f6f6e7134a5f299cc8de77370218f8019237 ("Implement
_dl_catch_error, _dl_signal_error in libc.so [BZ #16628]") has the
side effect that distinct namespaces, as created by dlmopen, now have
separate implementations of the rtld exception mechanism. This means
that the call to _dl_catch_error from libdl in a secondary namespace
does not actually install an exception handler because the
thread-local variable catch_hook in the libc.so copy in the secondary
namespace is distinct from that of the base namepace. As a result, a
dlsym/dlopen/... failure in a secondary namespace terminates the process
with a dynamic linker error because it looks to the exception handler
mechanism as if no handler has been installed.
This commit restores GLRO (dl_catch_error) and uses it to set the
handler in the base namespace.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'elf/rtld.c')
| -rw-r--r-- | elf/rtld.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/elf/rtld.c b/elf/rtld.c index 94a00e2049..fd02438936 100644 --- a/elf/rtld.c +++ b/elf/rtld.c @@ -368,6 +368,7 @@ struct rtld_global_ro _rtld_global_ro attribute_relro = ._dl_lookup_symbol_x = _dl_lookup_symbol_x, ._dl_open = _dl_open, ._dl_close = _dl_close, + ._dl_catch_error = _rtld_catch_error, ._dl_tls_get_addr_soft = _dl_tls_get_addr_soft, #ifdef HAVE_DL_DISCOVER_OSVERSION ._dl_discover_osversion = _dl_discover_osversion |