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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-26 19:13:38 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-26 19:13:38 -0700 |
| commit | 40233e7c447367ffc615b524187970732848d5e3 (patch) | |
| tree | f21626c0722b660902ddfadef62cb122203b1a84 | |
| parent | a689838913670765f7754bb1ba749acac9541626 (diff) | |
| parent | acbc372e6109c803cbee4733769d02008381740f (diff) | |
Merge tag 'selinux-pr-20190726' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux fix from Paul Moore:
"One small SELinux patch to add some proper bounds/overflow checking
when adding a new sid/secid"
* tag 'selinux-pr-20190726' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
selinux: check sidtab limit before adding a new entry
| -rw-r--r-- | security/selinux/ss/sidtab.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/security/selinux/ss/sidtab.c b/security/selinux/ss/sidtab.c index e63a90ff2728..1f0a6eaa2d6a 100644 --- a/security/selinux/ss/sidtab.c +++ b/security/selinux/ss/sidtab.c @@ -286,6 +286,11 @@ static int sidtab_reverse_lookup(struct sidtab *s, struct context *context, ++count; } + /* bail out if we already reached max entries */ + rc = -EOVERFLOW; + if (count >= SIDTAB_MAX) + goto out_unlock; + /* insert context into new entry */ rc = -ENOMEM; dst = sidtab_do_lookup(s, count, 1); |