media: vidtv: fix use after free in vidtv_channel_si_destroy()
Commit Message
This code frees "m->si.pat" and then dereferences it on the next line.
Fixes: 039b7caed173 ("media: vidtv: add a PID entry for the NIT table")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
drivers/media/test-drivers/vidtv/vidtv_channel.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
Comments
Hi Dan,
> This code frees "m->si.pat" and then dereferences it on the next line.
>
> Fixes: 039b7caed173 ("media: vidtv: add a PID entry for the NIT table")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
> drivers/media/test-drivers/vidtv/vidtv_channel.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
IIRC there has been a similar patch [1] that has already been accepted
by Mauro..
[1]: https://patchwork.linuxtv.org/project/linux-media/patch/20201127132832.15239-1-colin.king@canonical.com/
-- thanks
-- Daniel
@@ -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);