From: Jiasheng Jiang jiasheng@iscas.ac.cn

stable inclusion from stable-v5.10.201 commit 64863ba8e6b7651d994c6e6d506cc8aa2ac45edb category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RE9O CVE: CVE-2023-52841

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...

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[ Upstream commit 1fd6eb12642e0c32692924ff359c07de4b781d78 ]

Add check for the return value of kstrdup() and return the error if it fails in order to avoid NULL pointer dereference. Moreover, use kfree() in the later error handling in order to avoid memory leak.

Fixes: c2f78f0cb294 ("media: vidtv: psi: add a Network Information Table (NIT)") Signed-off-by: Jiasheng Jiang jiasheng@iscas.ac.cn Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Zeng Heng zengheng4@huawei.com --- drivers/media/test-drivers/vidtv/vidtv_mux.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/media/test-drivers/vidtv/vidtv_mux.c b/drivers/media/test-drivers/vidtv/vidtv_mux.c index b51e6a3b8cbe..f99878eff7ac 100644 --- a/drivers/media/test-drivers/vidtv/vidtv_mux.c +++ b/drivers/media/test-drivers/vidtv/vidtv_mux.c @@ -504,13 +504,16 @@ struct vidtv_mux *vidtv_mux_init(struct dvb_frontend *fe, m->priv = args->priv; m->network_id = args->network_id; m->network_name = kstrdup(args->network_name, GFP_KERNEL); + if (!m->network_name) + goto free_mux_buf; + m->timing.current_jiffies = get_jiffies_64();

if (args->channels) m->channels = args->channels; else if (vidtv_channels_init(m) < 0) - goto free_mux_buf; + goto free_mux_network_name;

/* will alloc data for pmt_sections after initializing pat */ if (vidtv_channel_si_init(m) < 0) @@ -527,6 +530,8 @@ struct vidtv_mux *vidtv_mux_init(struct dvb_frontend *fe, vidtv_channel_si_destroy(m); free_channels: vidtv_channels_destroy(m); +free_mux_network_name: + kfree(m->network_name); free_mux_buf: vfree(m->mux_buf); free_mux: