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Subject[PATCH 3/5] sysctl: Fix the selinux_sysctl_get_sid
Date

I goofed and when reenabling the fine grained selinux labels for
sysctls and forgot to add the "/sys" prefix before consulting
the policy database. When computing the same path using
proc_dir_entries we got the "/sys" for free as it was part
of the tree, but it isn't true for clt_table trees.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
security/selinux/hooks.c | 6 ++++++
1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 47fb937..de16b9f 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1445,6 +1445,12 @@ static int selinux_sysctl_get_sid(ctl_table *table, u16 tclass, u32 *sid)
path = end;
table = table->parent;
}
+ buflen -= 4;
+ if (buflen < 0)
+ goto out_free;
+ end -= 4;
+ memcpy(end, "/sys", 4);
+ path = end;
rc = security_genfs_sid("proc", path, tclass, sid);
out_free:
free_page((unsigned long)buffer);
--
1.4.4.1.g278f
-
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