mirror of
https://abf.rosa.ru/djam/glibc40.git
synced 2025-02-24 00:02:53 +00:00
55 lines
1.8 KiB
Diff
55 lines
1.8 KiB
Diff
https://sourceware.org/git/?p=glibc.git;a=commitdiff_plain;h=4b6be914bd3920500a67ef6ca1aa7d1c37e5e859
|
|
From: Andreas Schwab <schwab@linux-m68k.org>
|
|
Date: Thu, 27 May 2021 10:49:47 +0000 (+0200)
|
|
Subject: Use __pthread_attr_copy in mq_notify (bug 27896)
|
|
X-Git-Url: https://sourceware.org/git/?p=glibc.git;a=commitdiff_plain;h=4b6be914bd3920500a67ef6ca1aa7d1c37e5e859
|
|
|
|
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)
|
|
---
|
|
|
|
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;
|
|
}
|
|
|