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import glibc-2.28-164.el8

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CentOS Sources 2021-08-24 22:28:35 +00:00 committed by Andrew Lukoshko
parent 1f5d0e2ca3
commit 6823d1e6f5
5 changed files with 298 additions and 1 deletions
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159
SOURCES/glibc-rh1966472-1.patch Normal file
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@ -0,0 +1,159 @@
nptl: Add __pthread_attr_copy for copying pthread_attr_t objects
Also add the private type union pthread_attr_transparent, to reduce
the amount of casting that is required.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit 331c6e8a184167dd21a9f0b3fc165aeefea6eeca)
Difference from upstream:
Unlike upstream, __pthread_attr_copy is in libpthread.so.
# Conflicts:
# nptl/Makefile
# nptl/Versions
diff --git a/nptl/Makefile b/nptl/Makefile
index d6b37b6efd3b7d78..b14de3ffb330c10b 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -54,7 +54,8 @@ libpthread-routines = nptl-init nptlfreeres vars events version pt-interp \
pthread_getconcurrency pthread_setconcurrency \
pthread_getschedparam pthread_setschedparam \
pthread_setschedprio \
- pthread_attr_init pthread_attr_destroy \
+ pthread_attr_init pthread_attr_copy \
+ pthread_attr_destroy \
pthread_attr_getdetachstate pthread_attr_setdetachstate \
pthread_attr_getguardsize pthread_attr_setguardsize \
pthread_attr_getschedparam pthread_attr_setschedparam \
diff --git a/nptl/Versions b/nptl/Versions
index 6007fd03e7ed117c..e38272aa187fbe78 100644
--- a/nptl/Versions
+++ b/nptl/Versions
@@ -283,5 +283,6 @@ libpthread {
__pthread_barrier_init; __pthread_barrier_wait;
__shm_directory;
__libpthread_freeres;
+ __pthread_attr_copy;
}
}
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index 00be8f92793e8710..a2d48b2015cd385c 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -464,6 +464,9 @@ extern int __pthread_attr_getstack (const pthread_attr_t *__restrict __attr,
size_t *__restrict __stacksize);
extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr,
size_t __stacksize);
+extern int __pthread_attr_setaffinity_np (pthread_attr_t *attr,
+ size_t cpusetsize,
+ const cpu_set_t *cpuset);
extern int __pthread_rwlock_init (pthread_rwlock_t *__restrict __rwlock,
const pthread_rwlockattr_t *__restrict
__attr);
@@ -605,6 +608,11 @@ extern void __wait_lookup_done (void) attribute_hidden;
# define PTHREAD_STATIC_FN_REQUIRE(name) __asm (".globl " #name);
#endif
+/* Make a deep copy of the attribute *SOURCE in *TARGET. *TARGET is
+ not assumed to have been initialized. Returns 0 on success, or a
+ positive error code otherwise. */
+int __pthread_attr_copy (pthread_attr_t *target, const pthread_attr_t *source);
+
/* Returns 0 if POL is a valid scheduling policy. */
static inline int
check_sched_policy_attr (int pol)
diff --git a/nptl/pthread_attr_copy.c b/nptl/pthread_attr_copy.c
new file mode 100644
index 0000000000000000..67f272acf297100c
--- /dev/null
+++ b/nptl/pthread_attr_copy.c
@@ -0,0 +1,56 @@
+/* Deep copy of a pthread_attr_t object.
+ Copyright (C) 2020 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <pthreadP.h>
+#include <stdlib.h>
+
+int
+__pthread_attr_copy (pthread_attr_t *target, const pthread_attr_t *source)
+{
+ /* Avoid overwriting *TARGET until all allocations have
+ succeeded. */
+ union pthread_attr_transparent temp;
+ temp.external = *source;
+
+ /* Force new allocation. This function has full ownership of temp. */
+ temp.internal.cpuset = NULL;
+ temp.internal.cpusetsize = 0;
+
+ int ret = 0;
+
+ struct pthread_attr *isource = (struct pthread_attr *) source;
+
+ /* Propagate affinity mask information. */
+ if (isource->cpusetsize > 0)
+ ret = __pthread_attr_setaffinity_np (&temp.external,
+ isource->cpusetsize,
+ isource->cpuset);
+
+ if (ret != 0)
+ {
+ /* Deallocate because we have ownership. */
+ __pthread_attr_destroy (&temp.external);
+ return ret;
+ }
+
+ /* Transfer ownership. *target is not assumed to have been
+ initialized. */
+ *target = temp.external;
+ return 0;
+}
diff --git a/nptl/pthread_attr_setaffinity.c b/nptl/pthread_attr_setaffinity.c
index 545b72c91e290216..914ebf6f9cbfd5ff 100644
--- a/nptl/pthread_attr_setaffinity.c
+++ b/nptl/pthread_attr_setaffinity.c
@@ -55,6 +55,7 @@ __pthread_attr_setaffinity_new (pthread_attr_t *attr, size_t cpusetsize,
return 0;
}
+strong_alias (__pthread_attr_setaffinity_new, __pthread_attr_setaffinity_np)
versioned_symbol (libpthread, __pthread_attr_setaffinity_new,
pthread_attr_setaffinity_np, GLIBC_2_3_4);
diff --git a/sysdeps/nptl/internaltypes.h b/sysdeps/nptl/internaltypes.h
index b78ad99a888b4e3b..d3dce1278de989e2 100644
--- a/sysdeps/nptl/internaltypes.h
+++ b/sysdeps/nptl/internaltypes.h
@@ -49,6 +49,13 @@ struct pthread_attr
#define ATTR_FLAG_SCHED_SET 0x0020
#define ATTR_FLAG_POLICY_SET 0x0040
+/* Used to allocate a pthread_attr_t object which is also accessed
+ internally. */
+union pthread_attr_transparent
+{
+ pthread_attr_t external;
+ struct pthread_attr internal;
+};
/* Mutex attribute data structure. */
struct pthread_mutexattr

50
SOURCES/glibc-rh1966472-2.patch Normal file
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@ -0,0 +1,50 @@
Use __pthread_attr_copy in mq_notify (bug 27896)
Make a deep copy of the pthread attribute object to remove a potential
use-after-free issue.
(cherry picked from commit 42d359350510506b87101cf77202fefcbfc790cb)
# Conflicts:
# NEWS
diff --git a/sysdeps/unix/sysv/linux/mq_notify.c b/sysdeps/unix/sysv/linux/mq_notify.c
index 3563e82cd4f4b552..c4091169306ffde8 100644
--- a/sysdeps/unix/sysv/linux/mq_notify.c
+++ b/sysdeps/unix/sysv/linux/mq_notify.c
@@ -135,8 +135,11 @@ helper_thread (void *arg)
(void) __pthread_barrier_wait (&notify_barrier);
}
else if (data.raw[NOTIFY_COOKIE_LEN - 1] == NOTIFY_REMOVED)
- /* The only state we keep is the copy of the thread attributes. */
- free (data.attr);
+ {
+ /* The only state we keep is the copy of the thread attributes. */
+ pthread_attr_destroy (data.attr);
+ free (data.attr);
+ }
}
return NULL;
}
@@ -257,8 +260,7 @@ mq_notify (mqd_t mqdes, const struct sigevent *notification)
if (data.attr == NULL)
return -1;
- memcpy (data.attr, notification->sigev_notify_attributes,
- sizeof (pthread_attr_t));
+ __pthread_attr_copy (data.attr, notification->sigev_notify_attributes);
}
/* Construct the new request. */
@@ -272,7 +274,10 @@ mq_notify (mqd_t mqdes, const struct sigevent *notification)
/* If it failed, free the allocated memory. */
if (__glibc_unlikely (retval != 0))
- free (data.attr);
+ {
+ pthread_attr_destroy (data.attr);
+ free (data.attr);
+ }
return retval;
}

44
SOURCES/glibc-rh1966472-3.patch Normal file
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@ -0,0 +1,44 @@
Fix use of __pthread_attr_copy in mq_notify (bug 27896)
__pthread_attr_copy can fail and does not initialize the attribute
structure in that case.
If __pthread_attr_copy is never called and there is no allocated
attribute, pthread_attr_destroy should not be called, otherwise
there is a null pointer dereference in rt/tst-mqueue6.
Fixes commit 42d359350510506b87101cf77202fefcbfc790cb
("Use __pthread_attr_copy in mq_notify (bug 27896)").
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
(cherry picked from commit 217b6dc298156bdb0d6aea9ea93e7e394a5ff091)
diff --git a/sysdeps/unix/sysv/linux/mq_notify.c b/sysdeps/unix/sysv/linux/mq_notify.c
index c4091169306ffde8..45449571d14c379f 100644
--- a/sysdeps/unix/sysv/linux/mq_notify.c
+++ b/sysdeps/unix/sysv/linux/mq_notify.c
@@ -260,7 +260,14 @@ mq_notify (mqd_t mqdes, const struct sigevent *notification)
if (data.attr == NULL)
return -1;
- __pthread_attr_copy (data.attr, notification->sigev_notify_attributes);
+ int ret = __pthread_attr_copy (data.attr,
+ notification->sigev_notify_attributes);
+ if (ret != 0)
+ {
+ free (data.attr);
+ __set_errno (ret);
+ return -1;
+ }
}
/* Construct the new request. */
@@ -273,7 +280,7 @@ mq_notify (mqd_t mqdes, const struct sigevent *notification)
int retval = INLINE_SYSCALL (mq_notify, 2, mqdes, &se);
/* If it failed, free the allocated memory. */
- if (__glibc_unlikely (retval != 0))
+ if (retval != 0 && data.attr != NULL)
{
pthread_attr_destroy (data.attr);
free (data.attr);

34
SOURCES/glibc-rh1966472-4.patch Normal file
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@ -0,0 +1,34 @@
commit b805aebd42364fe696e417808a700fdb9800c9e8
Author: Nikita Popov <npv1310@gmail.com>
Date: Mon Aug 9 20:17:34 2021 +0530
librt: fix NULL pointer dereference (bug 28213)
Helper thread frees copied attribute on NOTIFY_REMOVED message
received from the OS kernel. Unfortunately, it fails to check whether
copied attribute actually exists (data.attr != NULL). This worked
earlier because free() checks passed pointer before actually
attempting to release corresponding memory. But
__pthread_attr_destroy assumes pointer is not NULL.
So passing NULL pointer to __pthread_attr_destroy will result in
segmentation fault. This scenario is possible if
notification->sigev_notify_attributes == NULL (which means default
thread attributes should be used).
Signed-off-by: Nikita Popov <npv1310@gmail.com>
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
diff --git a/sysdeps/unix/sysv/linux/mq_notify.c b/sysdeps/unix/sysv/linux/mq_notify.c
index 45449571d14c379f..581959d621135fb0 100644
--- a/sysdeps/unix/sysv/linux/mq_notify.c
+++ b/sysdeps/unix/sysv/linux/mq_notify.c
@@ -134,7 +134,7 @@ helper_thread (void *arg)
to wait until it is done with it. */
(void) __pthread_barrier_wait (&notify_barrier);
}
- else if (data.raw[NOTIFY_COOKIE_LEN - 1] == NOTIFY_REMOVED)
+ else if (data.raw[NOTIFY_COOKIE_LEN - 1] == NOTIFY_REMOVED && data.attr != NULL)
{
/* The only state we keep is the copy of the thread attributes. */
pthread_attr_destroy (data.attr);

12
SPECS/glibc.spec
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@ -1,6 +1,6 @@
%define glibcsrcdir glibc-2.28
%define glibcversion 2.28
%define glibcrelease 162%{?dist}
%define glibcrelease 164%{?dist}
# Pre-release tarballs are pulled in from git using a command that is
# effectively:
#
@ -715,6 +715,10 @@ Patch578: glibc-rh1956357-6.patch
Patch579: glibc-rh1956357-7.patch
Patch580: glibc-rh1956357-8.patch
Patch581: glibc-rh1979127.patch
Patch582: glibc-rh1966472-1.patch
Patch583: glibc-rh1966472-2.patch
Patch584: glibc-rh1966472-3.patch
Patch585: glibc-rh1966472-4.patch
##############################################################################
# Continued list of core "glibc" package information:
@ -2627,6 +2631,12 @@ fi
%files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
%changelog
* Mon Aug 9 2021 Siddhesh Poyarekar <siddhesh@redhat.com> - 2.28-164
- librt: fix NULL pointer dereference (#1966472).
* Mon Aug 9 2021 Siddhesh Poyarekar <siddhesh@redhat.com> - 2.28-163
- CVE-2021-33574: Deep copy pthread attribute in mq_notify (#1966472)
* Thu Jul 8 2021 Siddhesh Poyarekar <siddhesh@redhat.com> - 2.28-162
- CVE-2021-35942: wordexp: handle overflow in positional parameter number
(#1979127)