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    Subject[PATCH 5.10 53/95] audit: fix possible null-pointer dereference in audit_filter_rules
    Date
    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
    @@ -653,7 +653,7 @@ 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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