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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-11-15 18:26:09 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-11-15 18:26:09 +0100 |
| commit | da5322e65940e4e8426613a8ff3d99a08b350a52 (patch) | |
| tree | 5e0b8036ee4a8646bd868cfc256908f87bc2f281 | |
| parent | Merge tag 'pinctrl-v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/... (diff) | |
| parent | selinux: fix non-MLS handling in mls_context_to_sid() (diff) | |
| download | linux-da5322e65940e4e8426613a8ff3d99a08b350a52.tar.xz linux-da5322e65940e4e8426613a8ff3d99a08b350a52.zip | |
Merge tag 'selinux-pr-20181115' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull SELinux fixes from Paul Moore:
"Two small SELinux fixes for v4.20.
Ondrej's patch adds a check on user input, and my patch ensures we
don't look past the end of a buffer.
Both patches are quite small and pass the selinux-testsuite"
* tag 'selinux-pr-20181115' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: fix non-MLS handling in mls_context_to_sid()
selinux: check length properly in SCTP bind hook
| -rw-r--r-- | security/selinux/hooks.c | 3 | ||||
| -rw-r--r-- | security/selinux/ss/mls.c | 10 |
2 files changed, 10 insertions, 3 deletions
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 7ce683259357..a67459eb62d5 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -5318,6 +5318,9 @@ static int selinux_sctp_bind_connect(struct sock *sk, int optname, addr_buf = address; while (walk_size < addrlen) { + if (walk_size + sizeof(sa_family_t) > addrlen) + return -EINVAL; + addr = addr_buf; switch (addr->sa_family) { case AF_UNSPEC: diff --git a/security/selinux/ss/mls.c b/security/selinux/ss/mls.c index 2fe459df3c85..b7efa2296969 100644 --- a/security/selinux/ss/mls.c +++ b/security/selinux/ss/mls.c @@ -245,9 +245,13 @@ int mls_context_to_sid(struct policydb *pol, char *rangep[2]; if (!pol->mls_enabled) { - if ((def_sid != SECSID_NULL && oldc) || (*scontext) == '\0') - return 0; - return -EINVAL; + /* + * With no MLS, only return -EINVAL if there is a MLS field + * and it did not come from an xattr. + */ + if (oldc && def_sid == SECSID_NULL) + return -EINVAL; + return 0; } /* |