The function libcfs_ioctl_getdata() test to see if libcfs_ioctl_hdr is smaller than struct libcfs_ioctl_data in size. This is wrong and it breaks the ioctl that is used to collect LNet stats. The correct size to compare against is struct libcfs_ioctl_hdr.
Signed-off-by: James Simmons <uja.o...@gmail.com> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5935 Reviewed-on: http://review.whamcloud.com/12782 Fixes: ed2f549dc0f6 ("staging: lustre: libcfs: test if userland data is to small") Reported-by: Doug Oucharek <doug.s.oucha...@intel.com> Reviewed-by: Liang Zhen <liang.z...@intel.com> Reviewed-by: Doug Oucharek <doug.s.oucha...@intel.com> Reviewed-by: Oleg Drokin <oleg.dro...@intel.com> Signed-off-by: James Simmons <jsimm...@infradead.org> --- drivers/staging/lustre/lnet/libcfs/linux/linux-module.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/lustre/lnet/libcfs/linux/linux-module.c b/drivers/staging/lustre/lnet/libcfs/linux/linux-module.c index 075826b..c6837bc 100644 --- a/drivers/staging/lustre/lnet/libcfs/linux/linux-module.c +++ b/drivers/staging/lustre/lnet/libcfs/linux/linux-module.c @@ -134,7 +134,7 @@ int libcfs_ioctl_getdata(struct libcfs_ioctl_hdr **hdr_pp, return -EINVAL; } - if (hdr.ioc_len < sizeof(struct libcfs_ioctl_data)) { + if (hdr.ioc_len < sizeof(hdr)) { CERROR("libcfs ioctl: user buffer too small for ioctl\n"); return -EINVAL; } -- 1.8.3.1 _______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
