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| author | Daniil Dulov <d.dulov@aladdin.ru> | 2023-03-24 06:38:32 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-09-23 10:48:07 +0200 |
| commit | ac85dfa4828efbd339ca2860a1735bba0dc7ac55 (patch) | |
| tree | 3dc4642f85926799bf2ed52e9d85378c94d3fa69 | |
| parent | e483536ad009f47d7667895b362e3a1c4f6d39c2 (diff) | |
| download | linux-stable-ac85dfa4828efbd339ca2860a1735bba0dc7ac55.tar.gz linux-stable-ac85dfa4828efbd339ca2860a1735bba0dc7ac55.tar.bz2 linux-stable-ac85dfa4828efbd339ca2860a1735bba0dc7ac55.zip | |
media: dib7000p: Fix potential division by zero
[ Upstream commit a1db7b2c5533fc67e2681eb5efc921a67bc7d5b8 ]
Variable loopdiv can be assigned 0, then it is used as a denominator,
without checking it for 0.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 713d54a8bd81 ("[media] DiB7090: add support for the dib7090 based")
Signed-off-by: Daniil Dulov <d.dulov@aladdin.ru>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
[hverkuil: (bw != NULL) -> bw]
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/media/dvb-frontends/dib7000p.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/dvb-frontends/dib7000p.c b/drivers/media/dvb-frontends/dib7000p.c index 58387860b62d..f478b4859f44 100644 --- a/drivers/media/dvb-frontends/dib7000p.c +++ b/drivers/media/dvb-frontends/dib7000p.c @@ -500,7 +500,7 @@ static int dib7000p_update_pll(struct dvb_frontend *fe, struct dibx000_bandwidth prediv = reg_1856 & 0x3f; loopdiv = (reg_1856 >> 6) & 0x3f; - if ((bw != NULL) && (bw->pll_prediv != prediv || bw->pll_ratio != loopdiv)) { + if (loopdiv && bw && (bw->pll_prediv != prediv || bw->pll_ratio != loopdiv)) { dprintk("Updating pll (prediv: old = %d new = %d ; loopdiv : old = %d new = %d)\n", prediv, bw->pll_prediv, loopdiv, bw->pll_ratio); reg_1856 &= 0xf000; reg_1857 = dib7000p_read_word(state, 1857); |