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authorDavi Arnaut <davi.arnaut@gmail.com>2006-03-24 03:18:43 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-24 07:33:31 -0800
commit24277dda3a54aa5e6265487e1a3091e27f3c0c45 (patch)
tree8fdfcb8c522fff6ce6f82d0b06346b89a825d639 /kernel
parent96840aa00a031069a136ec4c55d0bdd09ac6d3a7 (diff)
downloadlinux-sh-24277dda3a54aa5e6265487e1a3091e27f3c0c45.tar.gz
[PATCH] strndup_user: convert module
Change hand-coded userspace string copying to strndup_user. Signed-off-by: Davi Arnaut <davi.arnaut@gmail.com> Cc: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/module.c19
1 files changed, 3 insertions, 16 deletions
diff --git a/kernel/module.c b/kernel/module.c
index fb404299082e..54623c714bba 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1572,7 +1572,6 @@ static struct module *load_module(void __user *umod,
exportindex, modindex, obsparmindex, infoindex, gplindex,
crcindex, gplcrcindex, versindex, pcpuindex, gplfutureindex,
gplfuturecrcindex;
- long arglen;
struct module *mod;
long err = 0;
void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
@@ -1691,23 +1690,11 @@ static struct module *load_module(void __user *umod,
}
/* Now copy in args */
- arglen = strlen_user(uargs);
- if (!arglen) {
- err = -EFAULT;
- goto free_hdr;
- }
- args = kmalloc(arglen, GFP_KERNEL);
- if (!args) {
- err = -ENOMEM;
+ args = strndup_user(uargs, ~0UL >> 1);
+ if (IS_ERR(args)) {
+ err = PTR_ERR(args);
goto free_hdr;
}
- if (copy_from_user(args, uargs, arglen) != 0) {
- err = -EFAULT;
- goto free_mod;
- }
-
- /* Userspace could have altered the string after the strlen_user() */
- args[arglen - 1] = '\0';
if (find_module(mod->name)) {
err = -EEXIST;