diff options
| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2017-04-03 21:13:55 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-04-05 21:37:23 +0200 |
| commit | 7e1621de146fbed6172252f14a6a41b2c5999a93 (patch) | |
| tree | 244737dfe7058e9e958aee74358526c2656d5106 /sound/firewire/bebob | |
| parent | 5b33504bada4d85092b69b3aaa7048c398b21dbb (diff) | |
ALSA: firewire-lib/bebob/oxfw: improve response evaluation for AV/C commands
In ALSA firewire stack, some AV/C commands are supported, including
vendor's extensions. Drivers includes response parser of each command,
according to its requirements, while the parser is written with loose
fashion in two points; error check and length check. This doesn't cause
any issues such as kernel corruption, but should be improved.
This commit modifies evaluations of return value on each parsers.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/bebob')
| -rw-r--r-- | sound/firewire/bebob/bebob_command.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/sound/firewire/bebob/bebob_command.c b/sound/firewire/bebob/bebob_command.c index 9402cc15dbc1..f9b4225dd86f 100644 --- a/sound/firewire/bebob/bebob_command.c +++ b/sound/firewire/bebob/bebob_command.c @@ -31,13 +31,15 @@ int avc_audio_set_selector(struct fw_unit *unit, unsigned int subunit_id, err = fcp_avc_transaction(unit, buf, 12, buf, 12, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(8)); - if (err > 0 && err < 9) + if (err < 0) + ; + else if (err < 9) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; else if (buf[0] == 0x0a) /* REJECTED */ err = -EINVAL; - else if (err > 0) + else err = 0; kfree(buf); @@ -67,7 +69,9 @@ int avc_audio_get_selector(struct fw_unit *unit, unsigned int subunit_id, err = fcp_avc_transaction(unit, buf, 12, buf, 12, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(8)); - if (err > 0 && err < 9) + if (err < 0) + ; + else if (err < 9) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; @@ -120,7 +124,9 @@ int avc_bridgeco_get_plug_type(struct fw_unit *unit, err = fcp_avc_transaction(unit, buf, 12, buf, 12, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(9)); - if ((err >= 0) && (err < 8)) + if (err < 0) + ; + else if (err < 11) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; @@ -150,7 +156,9 @@ int avc_bridgeco_get_plug_ch_pos(struct fw_unit *unit, err = fcp_avc_transaction(unit, buf, 12, buf, 256, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(9)); - if ((err >= 0) && (err < 8)) + if (err < 0) + ; + else if (err < 11) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; @@ -187,7 +195,9 @@ int avc_bridgeco_get_plug_section_type(struct fw_unit *unit, err = fcp_avc_transaction(unit, buf, 12, buf, 12, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(9) | BIT(10)); - if ((err >= 0) && (err < 8)) + if (err < 0) + ; + else if (err < 12) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; @@ -221,7 +231,9 @@ int avc_bridgeco_get_plug_input(struct fw_unit *unit, err = fcp_avc_transaction(unit, buf, 16, buf, 16, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7)); - if ((err >= 0) && (err < 8)) + if (err < 0) + ; + else if (err < 16) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; @@ -260,7 +272,9 @@ int avc_bridgeco_get_plug_strm_fmt(struct fw_unit *unit, err = fcp_avc_transaction(unit, buf, 12, buf, *len, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(10)); - if ((err >= 0) && (err < 12)) + if (err < 0) + ; + else if (err < 12) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; |