netdev - Re: [PATCH net v3] nfc: pn533: Clear nfc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <13e55ef1-24fd-6b78-8b67-792c7452fe79@linaro.org>
Date:   Wed, 14 Dec 2022 14:14:09 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Minsuk Kang <linuxlovemin@...sei.ac.kr>, netdev@...r.kernel.org
Cc:     linma@....edu.cn, davem@...emloft.net, sameo@...ux.intel.com,
        linville@...driver.com, dokyungs@...sei.ac.kr,
        jisoo.jang@...sei.ac.kr
Subject: Re: [PATCH net v3] nfc: pn533: Clear nfc_target before being used

On 14/12/2022 02:51, Minsuk Kang wrote:
> Fix a slab-out-of-bounds read that occurs in nla_put() called from
> nfc_genl_send_target() when target->sensb_res_len, which is duplicated
> from an nfc_target in pn533, is too large as the nfc_target is not
> properly initialized and retains garbage values. Clear nfc_targets with
> memset() before they are used.
> 
> Found by a modified version of syzkaller.
> 
> BUG: KASAN: slab-out-of-bounds in nla_put
> Call Trace:
>  memcpy
>  nla_put
>  nfc_genl_dump_targets
>  genl_lock_dumpit
>  netlink_dump
>  __netlink_dump_start
>  genl_family_rcv_msg_dumpit
>  genl_rcv_msg
>  netlink_rcv_skb
>  genl_rcv
>  netlink_unicast
>  netlink_sendmsg
>  sock_sendmsg
>  ____sys_sendmsg
>  ___sys_sendmsg
>  __sys_sendmsg
>  do_syscall_64
> 
> Fixes: 673088fb42d0 ("NFC: pn533: Send ATR_REQ directly for active device detection")
> Fixes: 361f3cb7f9cf ("NFC: DEP link hook implementation for pn533")
> Signed-off-by: Minsuk Kang <linuxlovemin@...sei.ac.kr>
> ---
> v2->v3:
>   Remove an inappropriate tag


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof