In this code, 0 is returned on memory allocation failure, even though
other failures return -ENOMEM or other similar values.
A simplified version of the Coccinelle semantic match that finds this
problem is as follows:
// <smpl>
@@
expression ret;
expression x,e1,e2,e3;
identifier alloc;
@@
ret = 0
... when != ret = e1
*x = alloc(...)
... when != ret = e2
if (x == NULL) { ... when != ret = e3
return ret;
}
// </smpl>
Signed-off-by: Himangi Saraogi <himangi774@xxxxxxxxx>
Acked-by: Julia Lawall <julia.lawall@xxxxxxx>
---
drivers/scsi/qla4xxx/ql4_os.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index c5d9564..72ba671 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -1050,6 +1050,7 @@ static int qla4xxx_get_host_stats(struct Scsi_Host *shost, char *buf, int len)
if (!ql_iscsi_stats) {
ql4_printk(KERN_ERR, ha,
"Unable to allocate memory for iscsi stats\n");
+ ret = -ENOMEM;
goto exit_host_stats;
}
--
1.9.1
--
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