From 0f102935a606e13e923905451c097acf8e87e4cd Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Wed, 3 Feb 2010 23:13:24 -0800 Subject: sysfs: sysfs_sd_setattr set iattrs unconditionally commit 7c0ff870d1ed287504a61ed865f3d728c757436b upstream. There is currently a bug in sysfs_sd_setattr inherited from sysfs_setattr in 2.6.32 where the first time we set the attributes on a sysfs file we allocate backing store but do not set the backing store attributes. Resulting in overly restrictive permissions on sysfs files. The fix is to simply modify the code so that it always executes when we update the sysfs attributes, as we did in 2.6.31 and earlier. Signed-off-by: Eric W. Biederman Tested-by: Jean Delvare Signed-off-by: Greg Kroah-Hartman --- fs/sysfs/inode.c | 47 +++++++++++++++++++++++------------------------ 1 file changed, 23 insertions(+), 24 deletions(-) (limited to 'fs/sysfs') diff --git a/fs/sysfs/inode.c b/fs/sysfs/inode.c index e28cecf179f..02a022a3d47 100644 --- a/fs/sysfs/inode.c +++ b/fs/sysfs/inode.c @@ -94,30 +94,29 @@ int sysfs_setattr(struct dentry * dentry, struct iattr * iattr) if (!sd_attrs) return -ENOMEM; sd->s_iattr = sd_attrs; - } else { - /* attributes were changed at least once in past */ - iattrs = &sd_attrs->ia_iattr; - - if (ia_valid & ATTR_UID) - iattrs->ia_uid = iattr->ia_uid; - if (ia_valid & ATTR_GID) - iattrs->ia_gid = iattr->ia_gid; - if (ia_valid & ATTR_ATIME) - iattrs->ia_atime = timespec_trunc(iattr->ia_atime, - inode->i_sb->s_time_gran); - if (ia_valid & ATTR_MTIME) - iattrs->ia_mtime = timespec_trunc(iattr->ia_mtime, - inode->i_sb->s_time_gran); - if (ia_valid & ATTR_CTIME) - iattrs->ia_ctime = timespec_trunc(iattr->ia_ctime, - inode->i_sb->s_time_gran); - if (ia_valid & ATTR_MODE) { - umode_t mode = iattr->ia_mode; - - if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) - mode &= ~S_ISGID; - iattrs->ia_mode = sd->s_mode = mode; - } + } + /* attributes were changed at least once in past */ + iattrs = &sd_attrs->ia_iattr; + + if (ia_valid & ATTR_UID) + iattrs->ia_uid = iattr->ia_uid; + if (ia_valid & ATTR_GID) + iattrs->ia_gid = iattr->ia_gid; + if (ia_valid & ATTR_ATIME) + iattrs->ia_atime = timespec_trunc(iattr->ia_atime, + inode->i_sb->s_time_gran); + if (ia_valid & ATTR_MTIME) + iattrs->ia_mtime = timespec_trunc(iattr->ia_mtime, + inode->i_sb->s_time_gran); + if (ia_valid & ATTR_CTIME) + iattrs->ia_ctime = timespec_trunc(iattr->ia_ctime, + inode->i_sb->s_time_gran); + if (ia_valid & ATTR_MODE) { + umode_t mode = iattr->ia_mode; + + if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID)) + mode &= ~S_ISGID; + iattrs->ia_mode = sd->s_mode = mode; } return error; } -- cgit v1.2.3-18-g5258