diff options
Diffstat (limited to 'source/l/glibc/patches/CVE-2021-33574_1.patch')
| -rw-r--r-- | source/l/glibc/patches/CVE-2021-33574_1.patch | 71 |
1 files changed, 0 insertions, 71 deletions
diff --git a/source/l/glibc/patches/CVE-2021-33574_1.patch b/source/l/glibc/patches/CVE-2021-33574_1.patch deleted file mode 100644 index 20f1889c..00000000 --- a/source/l/glibc/patches/CVE-2021-33574_1.patch +++ /dev/null @@ -1,71 +0,0 @@ -From 42d359350510506b87101cf77202fefcbfc790cb Mon Sep 17 00:00:00 2001 -From: Andreas Schwab <schwab@linux-m68k.org> -Date: Thu, 27 May 2021 12:49:47 +0200 -Subject: [PATCH] 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. ---- - NEWS | 4 ++++ - sysdeps/unix/sysv/linux/mq_notify.c | 15 ++++++++++----- - 2 files changed, 14 insertions(+), 5 deletions(-) - -diff --git a/NEWS b/NEWS -index 6f4d325d55..1bf3daa502 100644 ---- a/NEWS -+++ b/NEWS -@@ -62,6 +62,10 @@ Security related changes: - potentially resulting in degraded service or Denial of Service on the - local system. Reported by Chris Schanzle. - -+ CVE-2021-33574: The mq_notify function has a potential use-after-free -+ issue when using a notification type of SIGEV_THREAD and a thread -+ attribute with a non-default affinity mask. -+ - The following bugs are resolved with this release: - - [The release manager will add the list generated by -diff --git a/sysdeps/unix/sysv/linux/mq_notify.c b/sysdeps/unix/sysv/linux/mq_notify.c -index cc575a0cdd..f7ddfe5a6c 100644 ---- a/sysdeps/unix/sysv/linux/mq_notify.c -+++ b/sysdeps/unix/sysv/linux/mq_notify.c -@@ -133,8 +133,11 @@ helper_thread (void *arg) - (void) __pthread_barrier_wait (¬ify_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; - } -@@ -255,8 +258,7 @@ 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. */ -@@ -270,7 +272,10 @@ 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; - } --- -2.27.0 - - |