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authorJan Höppner <hoeppner@linux.vnet.ibm.com>2017-05-09 14:07:37 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2017-06-12 16:25:56 +0200
commit3050c20821d7e9f15566d105da9a0913de61e85c (patch)
treef8c0db1d991ce445cad3d71b4f051ad27d027045 /drivers/s390
parent9861dbd5b4a422ae03a8caa2fa6d2827912aa952 (diff)
s390/dasd: Remove variable sized array
Dynamic stack allocations are considered bad. Get rid of this one occurrence and use kstrdup() instead. Also, set the return codes so that we have only one exit where we can call kfree(). Signed-off-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/block/dasd_devmap.c47
1 files changed, 30 insertions, 17 deletions
diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c
index 1164b51d09f3..05e5762d045e 100644
--- a/drivers/s390/block/dasd_devmap.c
+++ b/drivers/s390/block/dasd_devmap.c
@@ -315,45 +315,58 @@ static int __init dasd_parse_range(const char *range)
char *features_str = NULL;
char *from_str = NULL;
char *to_str = NULL;
- size_t len = strlen(range) + 1;
- char tmp[len];
+ int rc = 0;
+ char *tmp;
- strlcpy(tmp, range, len);
+ tmp = kstrdup(range, GFP_KERNEL);
+ if (!tmp)
+ return -ENOMEM;
- if (dasd_evaluate_range_param(tmp, &from_str, &to_str, &features_str))
- goto out_err;
+ if (dasd_evaluate_range_param(tmp, &from_str, &to_str, &features_str)) {
+ rc = -EINVAL;
+ goto out;
+ }
- if (dasd_busid(from_str, &from_id0, &from_id1, &from))
- goto out_err;
+ if (dasd_busid(from_str, &from_id0, &from_id1, &from)) {
+ rc = -EINVAL;
+ goto out;
+ }
to = from;
to_id0 = from_id0;
to_id1 = from_id1;
if (to_str) {
- if (dasd_busid(to_str, &to_id0, &to_id1, &to))
- goto out_err;
+ if (dasd_busid(to_str, &to_id0, &to_id1, &to)) {
+ rc = -EINVAL;
+ goto out;
+ }
if (from_id0 != to_id0 || from_id1 != to_id1 || from > to) {
pr_err("%s is not a valid device range\n", range);
- goto out_err;
+ rc = -EINVAL;
+ goto out;
}
}
features = dasd_feature_list(features_str);
- if (features < 0)
- goto out_err;
+ if (features < 0) {
+ rc = -EINVAL;
+ goto out;
+ }
/* each device in dasd= parameter should be set initially online */
features |= DASD_FEATURE_INITIAL_ONLINE;
while (from <= to) {
sprintf(bus_id, "%01x.%01x.%04x", from_id0, from_id1, from++);
devmap = dasd_add_busid(bus_id, features);
- if (IS_ERR(devmap))
- return PTR_ERR(devmap);
+ if (IS_ERR(devmap)) {
+ rc = PTR_ERR(devmap);
+ goto out;
+ }
}
- return 0;
+out:
+ kfree(tmp);
-out_err:
- return -EINVAL;
+ return rc;
}
/*