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spice-char: fix segfault in char_spice_finalize 

In 'qemu_chr_open_spice_vmc' if the 'psubtype' is NULL, it will
call 'char_spice_finalize'. But as the SpiceChardev is not inserted
in the 'spice_chars' list, the 'QLIST_REMOVE' will cause a segfault.
Add a detect to avoid it.

Signed-off-by: Li Qiang <liqiang6-s@360.cn>
Message-Id: <1487665107-88004-1-git-send-email-liqiang6-s@360.cn>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Li Qiang <liq3ea@gmail.com>
This commit is contained in:
Li Qiang 2017-02-21 00:18:27 -08:00 committed by Paolo Bonzini
parent f6f99b4808
commit f20e6f8cd4
1 changed files with 4 additions and 1 deletions
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spice-qemu-char.c
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@ -215,7 +215,10 @@ static void char_spice_finalize(Object *obj)
SpiceChardev *s = SPICE_CHARDEV(obj);
vmc_unregister_interface(s);
QLIST_REMOVE(s, next);
if (s->next.le_prev) {
QLIST_REMOVE(s, next);
}
g_free((char *)s->sin.subtype);
#if SPICE_SERVER_VERSION >= 0x000c02