4.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: "J. Bruce Fields" <bfie...@redhat.com>
commit 9fc2b4b436cff7d8403034676014f1be9d534942 upstream.
Before calling into the filesystem, vfs_setxattr calls
security_inode_setxattr, which ends up calling selinux_inode_setxattr in
our case. That returns -EOPNOTSUPP whenever SBLABEL_MNT is not set.
SBLABEL_MNT was supposed to be set by sb_finish_set_opts, which sets it
only if selinux_is_sblabel_mnt returns true.
The selinux_is_sblabel_mnt logic was broken by eadcabc697e9 "SELinux: do
all flags twiddling in one place", which didn't take into the account
the SECURITY_FS_USE_NATIVE behavior that had been introduced for nfs
with eb9ae686507b "SELinux: Add new labeling type native labels".
This caused setxattr's of security labels over NFSv4.2 to fail.
Cc: Eric Paris <epa...@redhat.com>
Cc: David Quigley <dpqu...@davequigley.com>
Reported-by: Richard Chan <rc556...@outlook.com>
Signed-off-by: J. Bruce Fields <bfie...@redhat.com>
Acked-by: Stephen Smalley <s...@tycho.nsa.gov>
[PM: added the stable dependency]
Signed-off-by: Paul Moore <pmo...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
security/selinux/hooks.c | 1 +
1 file changed, 1 insertion(+)
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -403,6 +403,7 @@ static int selinux_is_sblabel_mnt(struct
return sbsec->behavior == SECURITY_FS_USE_XATTR ||
sbsec->behavior == SECURITY_FS_USE_TRANS ||
sbsec->behavior == SECURITY_FS_USE_TASK ||
+ sbsec->behavior == SECURITY_FS_USE_NATIVE ||
/* Special handling. Genfs but also in-core setxattr handler */
!strcmp(sb->s_type->name, "sysfs") ||
!strcmp(sb->s_type->name, "pstore") ||
--
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