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[PULL,22/31] chardev/baum: fix baum that releases brlapi twice

Message ID 42c74252d68714894de4ba6d9c257dcd919e30b0.1506288070.git.mjt@msgid.tls.msk.ru
State Accepted
Commit 98e8790326d732fc79f0c133d9658f4761ba9cb7
Headers show
Series None | expand

Commit Message

Michael Tokarev Sept. 24, 2017, 9:22 p.m. UTC 
From: Liang Yan <lyan@suse.com>


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>

Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

---
 chardev/baum.c | 1 +
 1 file changed, 1 insertion(+)

-- 
2.11.0
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Patch

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;