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[media] af9015: add more I2C msg checks

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Return EOPNOTSUPP for too long messages.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Antti Palosaari 2011-06-17 21:16:38 -03:00 committed by Mauro Carvalho Chehab
parent 16b2dc2a8b
commit 709d92083a
1 changed files with 12 additions and 0 deletions
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12
drivers/media/dvb/dvb-usb/af9015.c
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@ -292,6 +292,10 @@ Due to that the only way to select correct tuner is use demodulator I2C-gate.
} }
if (num > i + 1 && (msg[i+1].flags & I2C_M_RD)) { if (num > i + 1 && (msg[i+1].flags & I2C_M_RD)) {
if (msg[i].len > 3 || msg[i+1].len > 61) {
ret = -EOPNOTSUPP;
goto error;
}
if (msg[i].addr == if (msg[i].addr ==
af9015_af9013_config[0].demod_address) af9015_af9013_config[0].demod_address)
req.cmd = READ_MEMORY; req.cmd = READ_MEMORY;
@ -306,6 +310,10 @@ Due to that the only way to select correct tuner is use demodulator I2C-gate.
ret = af9015_ctrl_msg(d, &req); ret = af9015_ctrl_msg(d, &req);
i += 2; i += 2;
} else if (msg[i].flags & I2C_M_RD) { } else if (msg[i].flags & I2C_M_RD) {
if (msg[i].len > 61) {
ret = -EOPNOTSUPP;
goto error;
}
if (msg[i].addr == if (msg[i].addr ==
af9015_af9013_config[0].demod_address) { af9015_af9013_config[0].demod_address) {
ret = -EINVAL; ret = -EINVAL;
@ -321,6 +329,10 @@ Due to that the only way to select correct tuner is use demodulator I2C-gate.
ret = af9015_ctrl_msg(d, &req); ret = af9015_ctrl_msg(d, &req);
i += 1; i += 1;
} else { } else {
if (msg[i].len > 21) {
ret = -EOPNOTSUPP;
goto error;
}
if (msg[i].addr == if (msg[i].addr ==
af9015_af9013_config[0].demod_address) af9015_af9013_config[0].demod_address)
req.cmd = WRITE_MEMORY; req.cmd = WRITE_MEMORY;