glibc/glibc-upstream-2.34-146.patch

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Import glibc-2.34-32.fc35 from f35 * Thu Apr 28 2022 Carlos O'Donell <carlos@redhat.com> - 2.34-32 - Sync with upstream branch release/2.34/master, commit c66c92181ddbd82306537a608e8c0282587131de: - posix/glob.c: update from gnulib (BZ#25659) - linux: Fix fchmodat with AT_SYMLINK_NOFOLLOW for 64 bit time_t (BZ#29097) * Wed Apr 27 2022 Carlos O'Donell <carlos@redhat.com> - 2.34-31 - Sync with upstream branch release/2.34/master, commit 55640ed3fde48360a8e8083be4843bd2dc7cecfe: - i386: Regenerate ulps - linux: Fix missing internal 64 bit time_t stat usage - x86: Optimize L(less_vec) case in memcmp-evex-movbe.S - x86: Don't set Prefer_No_AVX512 for processors with AVX512 and AVX-VNNI - x86-64: Use notl in EVEX strcmp [BZ #28646] - x86: Shrink memcmp-sse4.S code size - x86: Double size of ERMS rep_movsb_threshold in dl-cacheinfo.h - x86: Optimize memmove-vec-unaligned-erms.S - x86-64: Replace movzx with movzbl - x86-64: Remove Prefer_AVX2_STRCMP - x86-64: Improve EVEX strcmp with masked load - x86: Replace sse2 instructions with avx in memcmp-evex-movbe.S - x86: Optimize memset-vec-unaligned-erms.S - x86: Optimize memcmp-evex-movbe.S for frontend behavior and size - x86: Modify ENTRY in sysdep.h so that p2align can be specified - x86-64: Optimize load of all bits set into ZMM register [BZ #28252] - scripts/glibcelf.py: Mark as UNSUPPORTED on Python 3.5 and earlier - dlfcn: Do not use rtld_active () to determine ld.so state (bug 29078) - INSTALL: Rephrase -with-default-link documentation - misc: Fix rare fortify crash on wchar funcs. [BZ 29030] - Default to --with-default-link=no (bug 25812) - scripts: Add glibcelf.py module * Thu Apr 21 2022 Carlos O'Donell <carlos@redhat.com> - 2.34-30 - Sync with upstream branch release/2.34/master, commit 71326f1f2fd09dafb9c34404765fb88129e94237: - nptl: Fix pthread_cancel cancelhandling atomic operations - mips: Fix mips64n32 64 bit time_t stat support (BZ#29069) - hurd: Fix arbitrary error code - nptl: Handle spurious EINTR when thread cancellation is disabled (BZ#29029) - S390: Add new s390 platform z16. - NEWS: Update fixed bug list for LD_AUDIT backports. - hppa: Fix bind-now audit (BZ #28857) - elf: Replace tst-audit24bmod2.so with tst-audit24bmod2 - Fix elf/tst-audit25a with default bind now toolchains - elf: Fix runtime linker auditing on aarch64 (BZ #26643) - elf: Issue la_symbind for bind-now (BZ #23734) - elf: Fix initial-exec TLS access on audit modules (BZ #28096) - elf: Add la_activity during application exit - elf: Do not fail for failed dlmopen on audit modules (BZ #28061) - elf: Issue audit la_objopen for vDSO - elf: Add audit tests for modules with TLSDESC - elf: Avoid unnecessary slowdown from profiling with audit (BZ#15533) - elf: Add _dl_audit_pltexit - elf: Add _dl_audit_pltenter - elf: Add _dl_audit_preinit - elf: Add _dl_audit_symbind_alt and _dl_audit_symbind - elf: Add _dl_audit_objclose - elf: Add _dl_audit_objsearch - elf: Add _dl_audit_activity_map and _dl_audit_activity_nsid - elf: Add _dl_audit_objopen - elf: Move la_activity (LA_ACT_ADD) after _dl_add_to_namespace_list() (BZ #28062) - elf: Move LAV_CURRENT to link_lavcurrent.h - elf: Fix elf_get_dynamic_info() for bootstrap - elf: Fix dynamic-link.h usage on rtld.c - elf: Fix elf_get_dynamic_info definition - elf: Avoid nested functions in the loader [BZ #27220] - powerpc: Delete unneeded ELF_MACHINE_BEFORE_RTLD_RELOC - hppa: Use END instead of PSEUDO_END in swapcontext.S - hppa: Implement swapcontext in assembler (bug 28960) Resolves: #2003291 Resolves: #2064181 Resolves: #2072328 Resolves: #2075713 Resolves: #2077838
2022-04-21 22:26:44 +00:00
commit b2d99731b6d27c719a30b8ffa931e91c73a6bb4b
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Tue Jul 20 15:58:35 2021 -0300
elf: Add _dl_audit_symbind_alt and _dl_audit_symbind
It consolidates the code required to call la_symbind{32,64} audit
callback.
Checked on x86_64-linux-gnu, i686-linux-gnu, and aarch64-linux-gnu.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
(cherry picked from commit cda4f265c65fb6c4ce38ca1cf0a7e527c5e77cd5)
diff --git a/elf/Versions b/elf/Versions
index 2af210b8f771c950..164682eaeaa9a1da 100644
--- a/elf/Versions
+++ b/elf/Versions
@@ -58,6 +58,7 @@ ld {
_dl_argv; _dl_find_dso_for_object; _dl_get_tls_static_info;
_dl_deallocate_tls; _dl_make_stack_executable;
_dl_rtld_di_serinfo; _dl_starting_up; _dl_fatal_printf;
+ _dl_audit_symbind_alt;
_rtld_global; _rtld_global_ro;
# Only here for gdb while a better method is developed.
diff --git a/elf/dl-audit.c b/elf/dl-audit.c
index cb1c3de93cba447b..a21530f30bc5524b 100644
--- a/elf/dl-audit.c
+++ b/elf/dl-audit.c
@@ -16,6 +16,7 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
+#include <assert.h>
#include <ldsodefs.h>
void
@@ -106,3 +107,124 @@ _dl_audit_objclose (struct link_map *l)
afct = afct->next;
}
}
+
+void
+_dl_audit_symbind_alt (struct link_map *l, const ElfW(Sym) *ref, void **value,
+ lookup_t result)
+{
+ if ((l->l_audit_any_plt | result->l_audit_any_plt) == 0)
+ return;
+
+ const char *strtab = (const char *) D_PTR (result, l_info[DT_STRTAB]);
+ /* Compute index of the symbol entry in the symbol table of the DSO with
+ the definition. */
+ unsigned int ndx = (ref - (ElfW(Sym) *) D_PTR (result, l_info[DT_SYMTAB]));
+
+ unsigned int altvalue = 0;
+ /* Synthesize a symbol record where the st_value field is the result. */
+ ElfW(Sym) sym = *ref;
+ sym.st_value = (ElfW(Addr)) *value;
+
+ struct audit_ifaces *afct = GLRO(dl_audit);
+ for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
+ {
+ struct auditstate *match_audit = link_map_audit_state (l, cnt);
+ struct auditstate *result_audit = link_map_audit_state (result, cnt);
+ if (afct->symbind != NULL
+ && ((match_audit->bindflags & LA_FLG_BINDFROM) != 0
+ || ((result_audit->bindflags & LA_FLG_BINDTO)
+ != 0)))
+ {
+ unsigned int flags = altvalue | LA_SYMB_DLSYM;
+ uintptr_t new_value = afct->symbind (&sym, ndx,
+ &match_audit->cookie,
+ &result_audit->cookie,
+ &flags, strtab + ref->st_name);
+ if (new_value != (uintptr_t) sym.st_value)
+ {
+ altvalue = LA_SYMB_ALTVALUE;
+ sym.st_value = new_value;
+ }
+
+ afct = afct->next;
+ }
+
+ *value = (void *) sym.st_value;
+ }
+}
+rtld_hidden_def (_dl_audit_symbind_alt)
+
+void
+_dl_audit_symbind (struct link_map *l, struct reloc_result *reloc_result,
+ const ElfW(Sym) *defsym, DL_FIXUP_VALUE_TYPE *value,
+ lookup_t result)
+{
+ reloc_result->bound = result;
+ /* Compute index of the symbol entry in the symbol table of the DSO with the
+ definition. */
+ reloc_result->boundndx = (defsym - (ElfW(Sym) *) D_PTR (result,
+ l_info[DT_SYMTAB]));
+
+ if ((l->l_audit_any_plt | result->l_audit_any_plt) == 0)
+ {
+ /* Set all bits since this symbol binding is not interesting. */
+ reloc_result->enterexit = (1u << DL_NNS) - 1;
+ return;
+ }
+
+ /* Synthesize a symbol record where the st_value field is the result. */
+ ElfW(Sym) sym = *defsym;
+ sym.st_value = DL_FIXUP_VALUE_ADDR (*value);
+
+ /* Keep track whether there is any interest in tracing the call in the lower
+ two bits. */
+ assert (DL_NNS * 2 <= sizeof (reloc_result->flags) * 8);
+ assert ((LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT) == 3);
+ reloc_result->enterexit = LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT;
+
+ const char *strtab2 = (const void *) D_PTR (result, l_info[DT_STRTAB]);
+
+ unsigned int flags = 0;
+ struct audit_ifaces *afct = GLRO(dl_audit);
+ for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
+ {
+ /* XXX Check whether both DSOs must request action or only one */
+ struct auditstate *l_state = link_map_audit_state (l, cnt);
+ struct auditstate *result_state = link_map_audit_state (result, cnt);
+ if ((l_state->bindflags & LA_FLG_BINDFROM) != 0
+ && (result_state->bindflags & LA_FLG_BINDTO) != 0)
+ {
+ if (afct->symbind != NULL)
+ {
+ uintptr_t new_value = afct->symbind (&sym,
+ reloc_result->boundndx,
+ &l_state->cookie,
+ &result_state->cookie,
+ &flags,
+ strtab2 + defsym->st_name);
+ if (new_value != (uintptr_t) sym.st_value)
+ {
+ flags |= LA_SYMB_ALTVALUE;
+ sym.st_value = new_value;
+ }
+ }
+
+ /* Remember the results for every audit library and store a summary
+ in the first two bits. */
+ reloc_result->enterexit &= flags & (LA_SYMB_NOPLTENTER
+ | LA_SYMB_NOPLTEXIT);
+ reloc_result->enterexit |= ((flags & (LA_SYMB_NOPLTENTER
+ | LA_SYMB_NOPLTEXIT))
+ << ((cnt + 1) * 2));
+ }
+ else
+ /* If the bind flags say this auditor is not interested, set the bits
+ manually. */
+ reloc_result->enterexit |= ((LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT)
+ << ((cnt + 1) * 2));
+ afct = afct->next;
+ }
+
+ reloc_result->flags = flags;
+ *value = DL_FIXUP_ADDR_VALUE (sym.st_value);
+}
diff --git a/elf/dl-runtime.c b/elf/dl-runtime.c
index 61c260ddb81b586c..c4413c9165cec8cb 100644
--- a/elf/dl-runtime.c
+++ b/elf/dl-runtime.c
@@ -297,84 +297,7 @@ _dl_profile_fixup (
auditing libraries the possibility to change the value and
tell us whether further auditing is wanted. */
if (defsym != NULL && GLRO(dl_naudit) > 0)
- {
- reloc_result->bound = result;
- /* Compute index of the symbol entry in the symbol table of
- the DSO with the definition. */
- reloc_result->boundndx = (defsym
- - (ElfW(Sym) *) D_PTR (result,
- l_info[DT_SYMTAB]));
-
- /* Determine whether any of the two participating DSOs is
- interested in auditing. */
- if ((l->l_audit_any_plt | result->l_audit_any_plt) != 0)
- {
- unsigned int flags = 0;
- struct audit_ifaces *afct = GLRO(dl_audit);
- /* Synthesize a symbol record where the st_value field is
- the result. */
- ElfW(Sym) sym = *defsym;
- sym.st_value = DL_FIXUP_VALUE_ADDR (value);
-
- /* Keep track whether there is any interest in tracing
- the call in the lower two bits. */
- assert (DL_NNS * 2 <= sizeof (reloc_result->flags) * 8);
- assert ((LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT) == 3);
- reloc_result->enterexit = LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT;
-
- const char *strtab2 = (const void *) D_PTR (result,
- l_info[DT_STRTAB]);
-
- for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
- {
- /* XXX Check whether both DSOs must request action or
- only one */
- struct auditstate *l_state = link_map_audit_state (l, cnt);
- struct auditstate *result_state
- = link_map_audit_state (result, cnt);
- if ((l_state->bindflags & LA_FLG_BINDFROM) != 0
- && (result_state->bindflags & LA_FLG_BINDTO) != 0)
- {
- if (afct->symbind != NULL)
- {
- uintptr_t new_value
- = afct->symbind (&sym, reloc_result->boundndx,
- &l_state->cookie,
- &result_state->cookie,
- &flags,
- strtab2 + defsym->st_name);
- if (new_value != (uintptr_t) sym.st_value)
- {
- flags |= LA_SYMB_ALTVALUE;
- sym.st_value = new_value;
- }
- }
-
- /* Remember the results for every audit library and
- store a summary in the first two bits. */
- reloc_result->enterexit
- &= flags & (LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT);
- reloc_result->enterexit
- |= ((flags & (LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT))
- << ((cnt + 1) * 2));
- }
- else
- /* If the bind flags say this auditor is not interested,
- set the bits manually. */
- reloc_result->enterexit
- |= ((LA_SYMB_NOPLTENTER | LA_SYMB_NOPLTEXIT)
- << ((cnt + 1) * 2));
-
- afct = afct->next;
- }
-
- reloc_result->flags = flags;
- value = DL_FIXUP_ADDR_VALUE (sym.st_value);
- }
- else
- /* Set all bits since this symbol binding is not interesting. */
- reloc_result->enterexit = (1u << DL_NNS) - 1;
- }
+ _dl_audit_symbind (l, reloc_result, defsym, &value, result);
#endif
/* Store the result for later runs. */
diff --git a/elf/dl-sym-post.h b/elf/dl-sym-post.h
index d68c2d2b1cd43c9b..a11095d3e8c3c937 100644
--- a/elf/dl-sym-post.h
+++ b/elf/dl-sym-post.h
@@ -52,54 +52,9 @@ _dl_sym_post (lookup_t result, const ElfW(Sym) *ref, void *value,
tell us whether further auditing is wanted. */
if (__glibc_unlikely (GLRO(dl_naudit) > 0))
{
- const char *strtab = (const char *) D_PTR (result,
- l_info[DT_STRTAB]);
- /* Compute index of the symbol entry in the symbol table of
- the DSO with the definition. */
- unsigned int ndx = (ref - (ElfW(Sym) *) D_PTR (result,
- l_info[DT_SYMTAB]));
-
if (match == NULL)
match = _dl_sym_find_caller_link_map (caller);
-
- if ((match->l_audit_any_plt | result->l_audit_any_plt) != 0)
- {
- unsigned int altvalue = 0;
- struct audit_ifaces *afct = GLRO(dl_audit);
- /* Synthesize a symbol record where the st_value field is
- the result. */
- ElfW(Sym) sym = *ref;
- sym.st_value = (ElfW(Addr)) value;
-
- for (unsigned int cnt = 0; cnt < GLRO(dl_naudit); ++cnt)
- {
- struct auditstate *match_audit
- = link_map_audit_state (match, cnt);
- struct auditstate *result_audit
- = link_map_audit_state (result, cnt);
- if (afct->symbind != NULL
- && ((match_audit->bindflags & LA_FLG_BINDFROM) != 0
- || ((result_audit->bindflags & LA_FLG_BINDTO)
- != 0)))
- {
- unsigned int flags = altvalue | LA_SYMB_DLSYM;
- uintptr_t new_value
- = afct->symbind (&sym, ndx,
- &match_audit->cookie,
- &result_audit->cookie,
- &flags, strtab + ref->st_name);
- if (new_value != (uintptr_t) sym.st_value)
- {
- altvalue = LA_SYMB_ALTVALUE;
- sym.st_value = new_value;
- }
- }
-
- afct = afct->next;
- }
-
- value = (void *) sym.st_value;
- }
+ _dl_audit_symbind_alt (match, ref, &value, result);
}
#endif
return value;
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 982f23c0287955fe..61f1dfb3f79a613a 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -1398,6 +1398,16 @@ void _dl_audit_objopen (struct link_map *l, Lmid_t nsid)
/* Call the la_objclose from the audit modules for the link_map L. */
void _dl_audit_objclose (struct link_map *l)
attribute_hidden;
+
+/* Call the la_symbind{32,64} from the audit modules for the link_map L. */
+void _dl_audit_symbind (struct link_map *l, struct reloc_result *reloc_result,
+ const ElfW(Sym) *defsym, DL_FIXUP_VALUE_TYPE *value,
+ lookup_t result)
+ attribute_hidden;
+/* Same as _dl_audit_symbind, but also sets LA_SYMB_DLSYM flag. */
+void _dl_audit_symbind_alt (struct link_map *l, const ElfW(Sym) *ref,
+ void **value, lookup_t result);
+rtld_hidden_proto (_dl_audit_symbind_alt)
#endif /* SHARED */
#if PTHREAD_IN_LIBC && defined SHARED