From d81a8a231247ed6a8317fe15a5df98fb88d02d16 Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 2 Aug 2017 13:32:30 -0700 Subject: [PATCH] ocfs2: don't clear SGID when inheriting ACLs commit 19ec8e48582670c021e998b9deb88e39a842ff45 upstream. When new directory 'DIR1' is created in a directory 'DIR0' with SGID bit set, DIR1 is expected to have SGID bit set (and owning group equal to the owning group of 'DIR0'). However when 'DIR0' also has some default ACLs that 'DIR1' inherits, setting these ACLs will result in SGID bit on 'DIR1' to get cleared if user is not member of the owning group. Fix the problem by moving posix_acl_update_mode() out of ocfs2_set_acl() into ocfs2_iop_set_acl(). That way the function will not be called when inheriting ACLs which is what we want as it prevents SGID bit clearing and the mode has been properly set by posix_acl_create() anyway. Also posix_acl_chmod() that is calling ocfs2_set_acl() takes care of updating mode itself. Fixes: 073931017b4 ("posix_acl: Clear SGID bit when setting file permissions") Link: http://lkml.kernel.org/r/20170801141252.19675-3-jack@suse.cz Signed-off-by: Jan Kara Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Joseph Qi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds [bwh: Backported to 3.16: - ocfs2_iop_set_acl() doesn't take a lock, so simply return on error - Add the status variable in ocfs2_iop_set_acl() - Pass NULL as the bh argument to ocfs2_acl_set_mode() - Adjust context] Signed-off-by: Ben Hutchings --- fs/ocfs2/acl.c | 27 ++++++++++++++------------- 1 file changed, 14 insertions(+), 13 deletions(-) diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c index 293ab80f3fe2..776aa6cfb6e2 100644 --- a/fs/ocfs2/acl.c +++ b/fs/ocfs2/acl.c @@ -240,19 +240,6 @@ int ocfs2_set_acl(handle_t *handle, switch (type) { case ACL_TYPE_ACCESS: name_index = OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS; - if (acl) { - umode_t mode; - ret = posix_acl_update_mode(inode, &mode, &acl); - if (ret) - return ret; - else { - ret = ocfs2_acl_set_mode(inode, di_bh, - handle, mode); - if (ret) - return ret; - - } - } break; case ACL_TYPE_DEFAULT: name_index = OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT; @@ -283,6 +270,20 @@ int ocfs2_set_acl(handle_t *handle, int ocfs2_iop_set_acl(struct inode *inode, struct posix_acl *acl, int type) { + int status; + + if (type == ACL_TYPE_ACCESS && acl) { + umode_t mode; + + status = posix_acl_update_mode(inode, &mode, &acl); + if (status) + return status; + + status = ocfs2_acl_set_mode(inode, NULL, NULL, mode); + if (status) + return status; + } + return ocfs2_set_acl(NULL, inode, NULL, type, acl, NULL, NULL); }