From: Colin King <colin.king@canonical.com>
To: "Daniel W . S . Almeida" <dwlsalmeida@gmail.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH][next] media: vidtv: fix a read from an object after it has been freed
Date: Fri, 27 Nov 2020 13:28:32 +0000 [thread overview]
Message-ID: <20201127132832.15239-1-colin.king@canonical.com> (raw)
From: Colin Ian King <colin.king@canonical.com>
Currently the call to vidtv_psi_pat_table_destroy frees the object
m->si.pat however m->si.pat->num_pmt is being accessed after the
free. Fix this by destroying m->si.pat after the m->si.pmt_secs[]
objects have been freed.
Addresses-Coverity: ("Read from pointer after free")
Fixes: 039b7caed173 ("media: vidtv: add a PID entry for the NIT table")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/media/test-drivers/vidtv/vidtv_channel.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/media/test-drivers/vidtv/vidtv_channel.c b/drivers/media/test-drivers/vidtv/vidtv_channel.c
index 8ad6c0744d36..7838e6272712 100644
--- a/drivers/media/test-drivers/vidtv/vidtv_channel.c
+++ b/drivers/media/test-drivers/vidtv/vidtv_channel.c
@@ -504,11 +504,11 @@ void vidtv_channel_si_destroy(struct vidtv_mux *m)
{
u32 i;
- vidtv_psi_pat_table_destroy(m->si.pat);
-
for (i = 0; i < m->si.pat->num_pmt; ++i)
vidtv_psi_pmt_table_destroy(m->si.pmt_secs[i]);
+ vidtv_psi_pat_table_destroy(m->si.pat);
+
kfree(m->si.pmt_secs);
vidtv_psi_sdt_table_destroy(m->si.sdt);
vidtv_psi_nit_table_destroy(m->si.nit);
--
2.29.2
reply other threads:[~2020-11-27 13:28 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=20201127132832.15239-1-colin.king@canonical.com \
--to=colin.king@canonical.com \
--cc=dwlsalmeida@gmail.com \
--cc=kernel-janitors@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=mchehab@kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).