All of lore.kernel.org
 help / color / mirror / Atom feed
From: Liang Yan <lyan@suse.com>
To: samuel.thibault@ens-lyon.org, pbonzini@redhat.com,
	marcandre.lureau@redhat.com
Cc: qemu-devel@nongnu.org, qemu-trivial@nongnu.org
Subject: [Qemu-trivial] [PATCH] chardev/baum: fix baum that releases brlapi twice
Date: Fri, 22 Sep 2017 18:55:33 -0400	[thread overview]
Message-ID: <20170922225533.1928-1-lyan@suse.com> (raw)

Error process of baum_chr_open needs to set brlapi null, so it won't
get released twice in char_braille_finalize, which will cause
"/usr/bin/qemu-system-x86_64: double free or corruption (!prev)"

Signed-off-by: Liang Yan <lyan@suse.com>
---
 chardev/baum.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/chardev/baum.c b/chardev/baum.c
index 302dd9666c..67fd783a59 100644
--- a/chardev/baum.c
+++ b/chardev/baum.c
@@ -643,6 +643,7 @@ static void baum_chr_open(Chardev *chr,
         error_setg(errp, "brlapi__openConnection: %s",
                    brlapi_strerror(brlapi_error_location()));
         g_free(handle);
+        baum->brlapi = NULL;
         return;
     }
     baum->deferred_init = 0;
-- 
2.14.1



WARNING: multiple messages have this Message-ID (diff)
From: Liang Yan <lyan@suse.com>
To: samuel.thibault@ens-lyon.org, pbonzini@redhat.com,
	marcandre.lureau@redhat.com
Cc: qemu-devel@nongnu.org, qemu-trivial@nongnu.org
Subject: [Qemu-devel] [PATCH] chardev/baum: fix baum that releases brlapi twice
Date: Fri, 22 Sep 2017 18:55:33 -0400	[thread overview]
Message-ID: <20170922225533.1928-1-lyan@suse.com> (raw)

Error process of baum_chr_open needs to set brlapi null, so it won't
get released twice in char_braille_finalize, which will cause
"/usr/bin/qemu-system-x86_64: double free or corruption (!prev)"

Signed-off-by: Liang Yan <lyan@suse.com>
---
 chardev/baum.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/chardev/baum.c b/chardev/baum.c
index 302dd9666c..67fd783a59 100644
--- a/chardev/baum.c
+++ b/chardev/baum.c
@@ -643,6 +643,7 @@ static void baum_chr_open(Chardev *chr,
         error_setg(errp, "brlapi__openConnection: %s",
                    brlapi_strerror(brlapi_error_location()));
         g_free(handle);
+        baum->brlapi = NULL;
         return;
     }
     baum->deferred_init = 0;
-- 
2.14.1

             reply	other threads:[~2017-09-22 22:56 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-22 22:55 Liang Yan [this message]
2017-09-22 22:55 ` [Qemu-devel] [PATCH] chardev/baum: fix baum that releases brlapi twice Liang Yan
2017-09-24 16:56 ` [Qemu-trivial] " Marc-André Lureau
2017-09-24 16:56   ` [Qemu-devel] " Marc-André Lureau
2017-09-24 20:49 ` [Qemu-trivial] " Michael Tokarev
2017-09-24 20:49   ` [Qemu-devel] " Michael Tokarev

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170922225533.1928-1-lyan@suse.com \
    --to=lyan@suse.com \
    --cc=marcandre.lureau@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=qemu-devel@nongnu.org \
    --cc=qemu-trivial@nongnu.org \
    --cc=samuel.thibault@ens-lyon.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.