From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Kaustubh Pandey <quic_kapandey@quicinc.com>
Cc: mark.tomlinson@alliedtelesis.co.nz, netdev@vger.kernel.org,
quic_sharathv@quicinc.com, quic_subashab@quicinc.com,
netfilter-devel@vger.kernel.org
Subject: Re: KASAN: vmalloc-out-of-bounds in ipt_do_table
Date: Mon, 23 Oct 2023 12:12:22 +0200 [thread overview]
Message-ID: <ZTZHBgHovKrN8q6w@calendula> (raw)
In-Reply-To: <7ce196a5-9477-41df-b0fa-c208021a35ba@quicinc.com>
Cc'ing netfilter-devel.
On Mon, Oct 23, 2023 at 03:31:25PM +0530, Kaustubh Pandey wrote:
> Hi Everyone,
>
> We have observed below issue on v5.15 kernel
>
> [83180.055298]
> ==================================================================
> [83180.055376] BUG: KASAN: vmalloc-out-of-bounds in ipt_do_table+0x43c/0xaf4
> [83180.055464] Read of size 8 at addr ffffffc02c0f9000 by task Disposer/1686
> [83180.055544] CPU: 1 PID: 1686 Comm: Disposer Tainted: G S W OE
> 5.15.78-android13-8-g3d973ad4cc47 #1
This is slightly behind current -stable. Perhaps this is missing?
commit e58a171d35e32e6e8c37cfe0e8a94406732a331f
Author: Florian Westphal <fw@strlen.de>
Date: Fri Feb 17 23:20:06 2023 +0100
netfilter: ebtables: fix table blob use-after-free
> [83180.055613] Hardware name: Qualcomm Technologies, Inc. Kalama
> MTP,davinci DVT (DT)
> [83180.055655] Call trace:
> [83180.055677] dump_backtrace+0x0/0x3b0
> [83180.055740] show_stack+0x2c/0x3c
> [83180.055792] dump_stack_lvl+0x8c/0xa8
> [83180.055866] print_address_description+0x74/0x384
> [83180.055940] kasan_report+0x180/0x260
> [83180.056002] __asan_load8+0xb4/0xb8
> [83180.056064] ipt_do_table+0x43c/0xaf4
> [83180.056120] iptable_mangle_hook+0xf4/0x22c
> [83180.056182] nf_hook_slow+0x90/0x198
> [83180.056245] ip_mc_output+0x50c/0x67c
> [83180.056302] ip_send_skb+0x88/0x1bc
> [83180.056355] udp_send_skb+0x524/0x930
> [83180.056415] udp_sendmsg+0x126c/0x13ac
> [83180.056474] udpv6_sendmsg+0x6d4/0x1764
> [83180.056539] inet6_sendmsg+0x78/0x98
> [83180.056605] __sys_sendto+0x360/0x450
> [83180.056667] __arm64_sys_sendto+0x80/0x9c
> [83180.056725] invoke_syscall+0x80/0x218
> [83180.056791] el0_svc_common+0x18c/0x1bc
> [83180.056857] do_el0_svc+0x44/0xfc
> [83180.056918] el0_svc+0x20/0x50
> [83180.056966] el0t_64_sync_handler+0x84/0xe4
> [83180.057020] el0t_64_sync+0x1a4/0x1a8
> [83180.057110] Memory state around the buggy address:
> [83180.057150] ffffffc02c0f8f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
> f8 f8 f8
> [83180.057193] ffffffc02c0f8f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
> f8 f8 f8
> [83180.057237] >ffffffc02c0f9000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
> f8 f8 f8
> [83180.057269] ^
> [83180.057304] ffffffc02c0f9080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
> f8 f8 f8
> [83180.057345] ffffffc02c0f9100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
> f8 f8 f8
> [83180.057378]
> ==================================================================
>
> There are no reproduction steps available for this.
>
> I have checked along the lines and see that
> https://github.com/torvalds/linux/commit/175e476b8cdf2a4de7432583b49c871345e4f8a1
> is still present in this kernel.
> Checked around similar lines in latest kernel and still see that
> implementation hasnt changed much.
>
> Can you pls help check if this is a known issue and was fixed in latest
> or help in pointing out how to debug this further ?
>
> Thanks,
> Kaustubh
>
next prev parent reply other threads:[~2023-10-23 10:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-23 10:01 KASAN: vmalloc-out-of-bounds in ipt_do_table Kaustubh Pandey
2023-10-23 10:12 ` Pablo Neira Ayuso [this message]
2023-10-25 17:22 ` Kaustubh Pandey
2023-10-23 11:20 ` Florian Westphal
2023-10-25 17:25 ` Kaustubh Pandey
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=ZTZHBgHovKrN8q6w@calendula \
--to=pablo@netfilter.org \
--cc=mark.tomlinson@alliedtelesis.co.nz \
--cc=netdev@vger.kernel.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=quic_kapandey@quicinc.com \
--cc=quic_sharathv@quicinc.com \
--cc=quic_subashab@quicinc.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox