| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.4 34/58] audit: fix possible null-pointer dereference in audit_filter_rules | Date | Mon, 25 Oct 2021 21:14:51 +0200 |
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From: Gaosheng Cui <cuigaosheng1@huawei.com>
commit 6e3ee990c90494561921c756481d0e2125d8b895 upstream.
Fix possible null-pointer dereference in audit_filter_rules.
audit_filter_rules() error: we previously assumed 'ctx' could be null
Cc: stable@vger.kernel.org Fixes: bf361231c295 ("audit: add saddr_fam filter field") Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com> Signed-off-by: Paul Moore <paul@paul-moore.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- kernel/auditsc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -624,7 +624,7 @@ static int audit_filter_rules(struct tas result = audit_comparator(audit_loginuid_set(tsk), f->op, f->val); break; case AUDIT_SADDR_FAM: - if (ctx->sockaddr) + if (ctx && ctx->sockaddr) result = audit_comparator(ctx->sockaddr->ss_family, f->op, f->val); break;
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