tree da0da58f10bcb7dd7a885f6032b46d1025af208b
parent e06f42d6c127883e58b747048752f44ae208ae47
author Serge Hallyn <serue@us.ibm.com> 1225385543 -0500
committer Linus Torvalds <torvalds@linux-foundation.org> 1225558185 -0700

file caps: always start with clear bprm->caps_*

While Linux doesn't honor setuid on scripts.  However, it mistakenly
behaves differently for file capabilities.

This patch fixes that behavior by making sure that get_file_caps()
begins with empty bprm->caps_*.  That way when a script is loaded,
its bprm->caps_* may be filled when binfmt_misc calls prepare_binprm(),
but they will be cleared again when binfmt_elf calls prepare_binprm()
next to read the interpreter's file capabilities.

Signed-off-by: Serge Hallyn <serue@us.ibm.com>
Acked-by: David Howells <dhowells@redhat.com>
Acked-by: Andrew G. Morgan <morgan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>