]> git.karo-electronics.de Git - karo-tx-linux.git/commit
x86-64: Fix the failure case in copy_user_handle_tail()
authorCQ Tang <cq.tang@intel.com>
Mon, 18 Mar 2013 15:02:21 +0000 (11:02 -0400)
committerH. Peter Anvin <hpa@linux.intel.com>
Mon, 18 Mar 2013 18:32:03 +0000 (11:32 -0700)
commit66db3feb486c01349f767b98ebb10b0c3d2d021b
tree89c75fe87e8cf1ad288ca32b98b8e6e258eb7493
parenta937536b868b8369b98967929045f1df54234323
x86-64: Fix the failure case in copy_user_handle_tail()

The increment of "to" in copy_user_handle_tail() will have incremented
before a failure has been noted.  This causes us to skip a byte in the
failure case.

Only do the increment when assured there is no failure.

Signed-off-by: CQ Tang <cq.tang@intel.com>
Link: http://lkml.kernel.org/r/20130318150221.8439.993.stgit@phlsvslse11.ph.intel.com
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org>
arch/x86/lib/usercopy_64.c