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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-23 09:21:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-23 09:21:53 -0700 |
| commit | 6a400063826b6ab7a9dc8eeddcb36a55ebbd7dab (patch) | |
| tree | 260cc5d31cb29406e9b7e0f59c46e4c5e39a4cb7 | |
| parent | c578ddb39e565139897124e74e5a43e56538cb33 (diff) | |
| parent | 763dafc520add02a1f4639b500c509acc0ea8e5b (diff) | |
Merge tag 'audit-pr-20200422' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
Pull audit fix from Paul Moore:
"One small audit patch fix, fixing a missing length check on input from
userspace, nothing crazy"
* tag 'audit-pr-20200422' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
audit: check the length of userspace generated audit records
| -rw-r--r-- | kernel/audit.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/audit.c b/kernel/audit.c index b69c8b460341..87f31bf1f0a0 100644 --- a/kernel/audit.c +++ b/kernel/audit.c @@ -1326,6 +1326,9 @@ static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2: if (!audit_enabled && msg_type != AUDIT_USER_AVC) return 0; + /* exit early if there isn't at least one character to print */ + if (data_len < 2) + return -EINVAL; err = audit_filter(msg_type, AUDIT_FILTER_USER); if (err == 1) { /* match or error */ |