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authorAndreas Gruenbacher <agruenba@redhat.com>2016-11-13 21:23:34 +0100
committerAl Viro <viro@zeniv.linux.org.uk>2016-11-17 00:00:23 -0500
commit4a59015372840a6fc35d7fd40638a9d5dc3ec958 (patch)
tree5116875c49182649c9230d0fee6e9b53c58abf3e /lib
parent961b708e95181041f403251f660bc70be3ff6ba3 (diff)
xattr: Fix setting security xattrs on sockfs
The IOP_XATTR flag is set on sockfs because sockfs supports getting the "system.sockprotoname" xattr. Since commit 6c6ef9f2, this flag is checked for setxattr support as well. This is wrong on sockfs because security xattr support there is supposed to be provided by security_inode_setsecurity. The smack security module relies on socket labels (xattrs). Fix this by adding a security xattr handler on sockfs that returns -EAGAIN, and by checking for -EAGAIN in setxattr. We cannot simply check for -EOPNOTSUPP in setxattr because there are filesystems that neither have direct security xattr support nor support via security_inode_setsecurity. A more proper fix might be to move the call to security_inode_setsecurity into sockfs, but it's not clear to me if that is safe: we would end up calling security_inode_post_setxattr after that as well. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions