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authorJonathan Neuschäfer <j.neuschaefer@gmx.net>2011-08-15 22:10:08 +0200
committerSamuel Thibault <samuel.thibault@ens-lyon.org>2011-08-20 18:31:55 +0200
commit5a3976828225947d333ff2326d04f8b20e48e072 (patch)
tree2ba3d3488c4a7689748d0e251d6bb7fc85577977 /pfinet/linux-src
parent35b2f0e44af1544253e0d1d5edaf5afe6d879f97 (diff)
pfinet/linux-src: fix a memory leak
* pfinet/linux-src/net/ipv4/ip_options.c (ip_options_get): calculate the size of opt only once, free opt before returning -EFAULT.
Diffstat (limited to 'pfinet/linux-src')
-rw-r--r--pfinet/linux-src/net/ipv4/ip_options.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/pfinet/linux-src/net/ipv4/ip_options.c b/pfinet/linux-src/net/ipv4/ip_options.c
index a3d1f0aa..ec21054d 100644
--- a/pfinet/linux-src/net/ipv4/ip_options.c
+++ b/pfinet/linux-src/net/ipv4/ip_options.c
@@ -491,15 +491,18 @@ void ip_options_undo(struct ip_options * opt)
int ip_options_get(struct ip_options **optp, unsigned char *data, int optlen, int user)
{
struct ip_options *opt;
+ size_t opt_size = sizeof(struct ip_options)+((optlen+3)&~3);
- opt = kmalloc(sizeof(struct ip_options)+((optlen+3)&~3), GFP_KERNEL);
+ opt = kmalloc(opt_size, GFP_KERNEL);
if (!opt)
return -ENOMEM;
memset(opt, 0, sizeof(struct ip_options));
if (optlen) {
if (user) {
- if (copy_from_user(opt->__data, data, optlen))
+ if (copy_from_user(opt->__data, data, optlen)) {
+ kfree_s(opt, opt_size);
return -EFAULT;
+ }
} else
memcpy(opt->__data, data, optlen);
}
@@ -509,7 +512,7 @@ int ip_options_get(struct ip_options **optp, unsigned char *data, int optlen, in
opt->is_data = 1;
opt->is_setbyuser = 1;
if (optlen && ip_options_compile(opt, NULL)) {
- kfree_s(opt, sizeof(struct ip_options) + optlen);
+ kfree_s(opt, opt_size);
return -EINVAL;
}
*optp = opt;