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Commit ed2f549d authored by Liang Zhen's avatar Liang Zhen Committed by Greg Kroah-Hartman
Browse files

staging: lustre: libcfs: test if userland data is to small 



Ensure that user land data is at least the smallest size.

Signed-off-by: default avatarLiang Zhen <liang.zhen@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5435
Reviewed-on: http://review.whamcloud.com/11313


Reviewed-by: default avatarBobi Jam <bobijam@gmail.com>
Reviewed-by: default avatarJohann Lombardi <johann.lombardi@intel.com>
Reviewed-by: default avatarOleg Drokin <oleg.drokin@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 6d0aeaa3

drivers/staging/lustre/lnet/libcfs/linux/linux-module.c

+5 −0
Original line number Diff line number Diff line
@@ -73,6 +73,11 @@ int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp, 
		return -EINVAL;

	}



	if (hdr.ioc_len < sizeof(struct libcfs_ioctl_data)) {

		CERROR("libcfs ioctl: user buffer too small for ioctl\n");

		return -EINVAL;

	}



	if (hdr.ioc_len > LIBCFS_IOC_DATA_MAX) {

		CERROR("libcfs ioctl: user buffer is too large %d/%d\n",

		       hdr.ioc_len, LIBCFS_IOC_DATA_MAX);