tree 7a782163f6598510ae57b0523c2e625a8b26f2ce
parent a66d2c8f7ec1284206ca7c14569e2a607583f1e3
author J. Bruce Fields <bfields@fieldses.org> 1343071037 -0400
committer Linus Torvalds <torvalds@linux-foundation.org> 1343072761 -0700

locks: fix checking of fcntl_setlease argument

The only checks of the long argument passed to fcntl(fd,F_SETLEASE,.)
are done after converting the long to an int.  Thus some illegal values
may be let through and cause problems in later code.

[ They actually *don't* cause problems in mainline, as of Dave Jones's
  commit 8d657eb3b438 "Remove easily user-triggerable BUG from
  generic_setlease", but we should fix this anyway.  And this patch will
  be necessary to fix real bugs on earlier kernels. ]

Cc: stable@vger.kernel.org
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>