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| author | Zheyu Ma <zheyuma97@gmail.com> | 2022-04-05 12:50:18 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@kernel.org> | 2024-04-29 13:21:55 +0300 |
| commit | c1115ddbda9c930fba0fdd062e7a8873ebaf898d (patch) | |
| tree | e5e8ab8eabd83862c85e7f9d5bf552fe3c5689f0 /drivers/media/dvb-frontends | |
| parent | 4a7d735191dec9ccaf95f26f63cb6b46fb8cd260 (diff) | |
| download | linux-c1115ddbda9c930fba0fdd062e7a8873ebaf898d.tar.xz | |
media: lgdt3306a: Add a check against null-pointer-def
The driver should check whether the client provides the platform_data.
The following log reveals it:
[ 29.610324] BUG: KASAN: null-ptr-deref in kmemdup+0x30/0x40
[ 29.610730] Read of size 40 at addr 0000000000000000 by task bash/414
[ 29.612820] Call Trace:
[ 29.613030] <TASK>
[ 29.613201] dump_stack_lvl+0x56/0x6f
[ 29.613496] ? kmemdup+0x30/0x40
[ 29.613754] print_report.cold+0x494/0x6b7
[ 29.614082] ? kmemdup+0x30/0x40
[ 29.614340] kasan_report+0x8a/0x190
[ 29.614628] ? kmemdup+0x30/0x40
[ 29.614888] kasan_check_range+0x14d/0x1d0
[ 29.615213] memcpy+0x20/0x60
[ 29.615454] kmemdup+0x30/0x40
[ 29.615700] lgdt3306a_probe+0x52/0x310
[ 29.616339] i2c_device_probe+0x951/0xa90
Link: https://lore.kernel.org/linux-media/20220405095018.3993578-1-zheyuma97@gmail.com
Signed-off-by: Zheyu Ma <zheyuma97@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/media/dvb-frontends')
| -rw-r--r-- | drivers/media/dvb-frontends/lgdt3306a.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/lgdt3306a.c b/drivers/media/dvb-frontends/lgdt3306a.c index 263887592415..231b45632ad5 100644 --- a/drivers/media/dvb-frontends/lgdt3306a.c +++ b/drivers/media/dvb-frontends/lgdt3306a.c @@ -2176,6 +2176,11 @@ static int lgdt3306a_probe(struct i2c_client *client) struct dvb_frontend *fe; int ret; + if (!client->dev.platform_data) { + dev_err(&client->dev, "platform data is mandatory\n"); + return -EINVAL; + } + config = kmemdup(client->dev.platform_data, sizeof(struct lgdt3306a_config), GFP_KERNEL); if (config == NULL) { |