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Staging: lustre: integer overflow in ioctl

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hdr->ioc_len is a user controlled u32 so the addition can overflow,
especially on 32 bit systems.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2015-04-01 11:12:15 +03:00 • committed by Greg Kroah-Hartman
commit faec8ab42b
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/lustre/lustre/libcfs/linux/linux-module.c
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@ -57,7 +57,7 @@ int libcfs_ioctl_getdata(char *buf, char *end, void *arg)
return -EINVAL;
}
if (hdr->ioc_len + buf >= end) {
if (hdr->ioc_len >= end - buf) {
CERROR("PORTALS: user buffer exceeds kernel buffer\n");
return -EINVAL;
}