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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2017-04-03 15:13:55 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-04-05 22:37:23 +0300 |
| commit | 7e1621de146fbed6172252f14a6a41b2c5999a93 (patch) | |
| tree | 244737dfe7058e9e958aee74358526c2656d5106 /sound/firewire/fcp.c | |
| parent | 5b33504bada4d85092b69b3aaa7048c398b21dbb (diff) | |
| download | linux-7e1621de146fbed6172252f14a6a41b2c5999a93.tar.xz | |
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/fcp.c')
| -rw-r--r-- | sound/firewire/fcp.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sound/firewire/fcp.c b/sound/firewire/fcp.c index cce19768f43d..61dda828f767 100644 --- a/sound/firewire/fcp.c +++ b/sound/firewire/fcp.c @@ -63,7 +63,9 @@ int avc_general_set_sig_fmt(struct fw_unit *unit, unsigned int rate, /* do transaction and check buf[1-5] are the same against command */ err = fcp_avc_transaction(unit, buf, 8, buf, 8, BIT(1) | BIT(2) | BIT(3) | BIT(4) | BIT(5)); - if (err >= 0 && err < 8) + if (err < 0) + ; + else if (err < 8) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; @@ -106,7 +108,9 @@ int avc_general_get_sig_fmt(struct fw_unit *unit, unsigned int *rate, /* do transaction and check buf[1-4] are the same against command */ err = fcp_avc_transaction(unit, buf, 8, buf, 8, BIT(1) | BIT(2) | BIT(3) | BIT(4)); - if (err >= 0 && err < 8) + if (err < 0) + ; + else if (err < 8) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; @@ -154,7 +158,9 @@ int avc_general_get_plug_info(struct fw_unit *unit, unsigned int subunit_type, buf[3] = 0xff & subfunction; err = fcp_avc_transaction(unit, buf, 8, buf, 8, BIT(1) | BIT(2)); - if (err >= 0 && err < 8) + if (err < 0) + ; + else if (err < 8) err = -EIO; else if (buf[0] == 0x08) /* NOT IMPLEMENTED */ err = -ENOSYS; |