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

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

Signed-off-by: Liang 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: Bobi Jam <bobijam@gmail.com>
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Liang Zhen 2016-03-22 19:03:57 -04:00 committed by Greg Kroah-Hartman
parent 6d0aeaa361
commit ed2f549dc0
1 changed files with 5 additions and 0 deletions
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5
drivers/staging/lustre/lnet/libcfs/linux/linux-module.c
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@ -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);