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Date: Wed, 8 Jul 2015 00:35:22 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Eric Paris <eparis@...hat.com>, David Quigley <dpquigl@...equigley.com>, Richard Chan <rc556677@...look.com>, "J. Bruce Fields" <bfields@...hat.com>, Stephen Smalley <sds@...ho.nsa.gov>, Paul Moore <pmoore@...hat.com> Subject: [PATCH 4.1 33/56] selinux: fix setting of security labels on NFS 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: "J. Bruce Fields" <bfields@...hat.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 <eparis@...hat.com> Cc: David Quigley <dpquigl@...equigley.com> Reported-by: Richard Chan <rc556677@...look.com> Signed-off-by: J. Bruce Fields <bfields@...hat.com> Acked-by: Stephen Smalley <sds@...ho.nsa.gov> [PM: added the stable dependency] Signed-off-by: Paul Moore <pmoore@...hat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.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") || -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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