[Qemu-trivial] [PATCH 4/5] libcacard/vreader.c: fix possible NULL dereference

[Alon Levy]

Reported by Coverity:

Error: FORWARD_NULL (CWE-476):
qemu-1.5.0/libcacard/vreader.c:267: cond_false: Condition "card == NULL", 
taking false branch
qemu-1.5.0/libcacard/vreader.c:269: if_end: End of if statement
qemu-1.5.0/libcacard/vreader.c:272: cond_false: Condition "apdu == NULL", 
taking false branch
qemu-1.5.0/libcacard/vreader.c:275: else_branch: Reached else branch
qemu-1.5.0/libcacard/vreader.c:280: cond_false: Condition "response", taking 
false branch
qemu-1.5.0/libcacard/vreader.c:284: if_end: End of if statement
qemu-1.5.0/libcacard/vreader.c:280: var_compare_op: Comparing "response" to 
null implies that "response" might be null.
qemu-1.5.0/libcacard/vreader.c:286: cond_true: Condition "card_status == 
VCARD_DONE", taking true branch
qemu-1.5.0/libcacard/vreader.c:287: cond_true: Condition "card_status == 
VCARD_DONE", taking true branch
qemu-1.5.0/libcacard/vreader.c:288: var_deref_op: Dereferencing null pointer 
"response".

Signed-off-by: Alon Levy <address@hidden>
---
 libcacard/vreader.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libcacard/vreader.c b/libcacard/vreader.c
index 5793d73..60eb43b 100644
--- a/libcacard/vreader.c
+++ b/libcacard/vreader.c
@@ -260,7 +260,7 @@ vreader_xfr_bytes(VReader *reader,
 {
     VCardAPDU *apdu;
     VCardResponse *response = NULL;
-    VCardStatus card_status;
+    VCardStatus card_status = VCARD_FAIL;
     unsigned short status;
     VCard *card = vreader_get_card(reader);
 
-- 
1.8.2.1