Hello, This is a third version of my patches to fix handling of s[ug]id bits and capabilities xattrs in VFS. There are a few issues I found: 1) MS_NOSEC handling is broken - we set it after each file_remove_suid() call. However we needn't have removed suid bit simply because we have CAP_SYS_FSID and further writes to the file from processes without this capability still need to clear the suid bit. 2) file_remove_suid() is a misnomer since it also handles removing of security labels. It is even more confusing because should_remove_suid() doesn't return whether file_remove_suid() is needed or not. 3) On truncate we do clear suid bits but not security labels. According to documentation in include/linux/security.h that's a bug but please correct me if I'm wrong. 4) ocfs2 doesn't clear capability xattrs - hard to fix, I left it alone for now. 5) XFS didn't provide proper exclusion for clearing mode bits. This series aims at fixing above issues. Al, can you please merge the patches? Thanks! Changes since v2: * Rebased on top of current Linus' tree * Improved patch 1 to use inode_has_no_xattr() as Linus suggested Changes since v1: * Removed bogus patch changing inode_set_flags() * Updated changelog of patch 4/5 to better explain why ->inode_killpriv should be called * Included a fix for MS_NOSEC handling in this series. Honza -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
