tree 77d24804c4e53b726d459b79a0b9850fe90c8c52
parent dc1ccc48159d63eca5089e507c82c7d22ef60839
author Dan Carpenter <dan.carpenter@oracle.com> 1383242410 +0300
committer Ben Myers <bpm@sgi.com> 1386691177 -0600

xfs: underflow bug in xfs_attrlist_by_handle()

If we allocate less than sizeof(struct attrlist) then we end up
corrupting memory or doing a ZERO_PTR_SIZE dereference.

This can only be triggered with CAP_SYS_ADMIN.

Reported-by: Nico Golde <nico@ngolde.de>
Reported-by: Fabian Yamaguchi <fabs@goesec.de>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

(cherry picked from commit 071c529eb672648ee8ca3f90944bcbcc730b4c06)