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ipc: set EFAULT as default error in load_msg()

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Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Acked-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Hurley 2013-04-30 19:14:42 -07:00 • committed by Linus Torvalds
parent da085d4591
commit 2b3097a294
1 changed files with 3 additions and 7 deletions
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10
ipc/msgutil.c
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@ -84,7 +84,7 @@ struct msg_msg *load_msg(const void __user *src, int len)
{ {
struct msg_msg *msg; struct msg_msg *msg;
struct msg_msgseg *seg; struct msg_msgseg *seg;
int err; int err = -EFAULT;
int alen; int alen;
msg = alloc_msg(len); msg = alloc_msg(len);
@ -92,20 +92,16 @@ struct msg_msg *load_msg(const void __user *src, int len)
return ERR_PTR(-ENOMEM); return ERR_PTR(-ENOMEM);
alen = min(len, DATALEN_MSG); alen = min(len, DATALEN_MSG);
if (copy_from_user(msg + 1, src, alen)) { if (copy_from_user(msg + 1, src, alen))
err = -EFAULT;
goto out_err; goto out_err;
}
for (seg = msg->next; seg != NULL; seg = seg->next) { for (seg = msg->next; seg != NULL; seg = seg->next) {
len -= alen; len -= alen;
src = (char __user *)src + alen; src = (char __user *)src + alen;
alen = min(len, DATALEN_SEG); alen = min(len, DATALEN_SEG);
if (copy_from_user(seg + 1, src, alen)) { if (copy_from_user(seg + 1, src, alen))
err = -EFAULT;
goto out_err; goto out_err;
} }
}
err = security_msg_msg_alloc(msg); err = security_msg_msg_alloc(msg);
if (err) if (err)