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Hotfix for invalid Systemtap probe in pthread_join (#1674280)

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This commit is contained in:
Florian Weimer 2019-02-11 21:42:14 +01:00
parent 8e6306e004
commit b82e3b3f85
2 changed files with 31 additions and 1 deletions
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26
glibc-rh1674280.patch Normal file
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@ -0,0 +1,26 @@
Fix a user-after-free bug in the Systemtap probe in
__pthread_timedjoin_ex:
/* Free the TCB. */
__free_tcb (pd);
}
else
pd->joinid = NULL;
LIBC_PROBE (pthread_join_ret, 3, threadid, result, pd->result);
__free_tcb has freed the stack, the access pd->result is invalid.
diff --git a/nptl/pthread_join_common.c b/nptl/pthread_join_common.c
index ecb78ffba5861bdc..45deba6a74c5efd2 100644
--- a/nptl/pthread_join_common.c
+++ b/nptl/pthread_join_common.c
@@ -101,7 +101,7 @@ __pthread_timedjoin_ex (pthread_t threadid, void **thread_return,
else
pd->joinid = NULL;
- LIBC_PROBE (pthread_join_ret, 3, threadid, result, pd->result);
+ LIBC_PROBE (pthread_join_ret, 3, threadid, result, result);
return result;
}

6
glibc.spec
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@ -87,7 +87,7 @@
Summary: The GNU libc libraries
Name: glibc
Version: %{glibcversion}
Release: 6%{?dist}
Release: 7%{?dist}
# In general, GPLv2+ is used by programs, LGPLv2+ is used for
# libraries.
@ -158,6 +158,7 @@ Patch18: glibc-c-utf8-locale.patch
Patch23: glibc-python3.patch
Patch28: glibc-rh1615608.patch
Patch29: glibc-rh1670028.patch
Patch99: glibc-rh1674280.patch
##############################################################################
# Continued list of core "glibc" package information:
@ -1889,6 +1890,9 @@ fi
%files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
%changelog
* Mon Feb 11 2019 Florian Weimer <fweimer@redhat.com> - 2.29-7
- Hotfix for invalid Systemtap probe in pthread_join (#1674280)
* Mon Feb 11 2019 Florian Weimer <fweimer@redhat.com> - 2.29-6
- Remove LRA bug on POWER workaround, fixed in gcc-9.0.1-0.4.fc30 (#1673018)