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libc/oss: check argp per ioctl

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... as some ioctls do not require a valid pointer.
This commit is contained in:
Christian Helmuth 2021-09-09 10:47:05 +02:00 committed by Norman Feske
parent 5c82045170
commit 2ba5e4a5b1
1 changed files with 68 additions and 4 deletions
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72
repos/libports/src/lib/libc/vfs_plugin.cc
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@ -1173,16 +1173,13 @@ Libc::Vfs_plugin::_ioctl_dio(File_descriptor *fd, unsigned long request, char *a
Libc::Vfs_plugin::Ioctl_result
Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char *argp)
{
if (!argp)
return { true, EINVAL };
bool handled = false;
/*
* Initialize to "success" and any ioctl is required to set
* in case of error.
*
* This method will either return handled equals true if the I/O control
* was handled successfully or failed and the result is not successfull
* was handled successfully or failed and the result is not successful
* (see the end of this method).
*
*/
@ -1190,12 +1187,16 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
if (request == OSS_GETVERSION) {
if (!argp) return { true, EINVAL };
*(int *)argp = SOUND_VERSION;
handled = true;
} else if (request == SNDCTL_DSP_CHANNELS) {
if (!argp) return { true, EINVAL };
monitor().monitor([&] {
_with_info(*fd, [&] (Xml_node info) {
if (info.type() != "oss") {
@ -1230,6 +1231,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_CURRENT_OPTR) {
if (!argp) return { true, EINVAL };
monitor().monitor([&] {
_with_info(*fd, [&] (Xml_node info) {
@ -1258,6 +1261,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_GETERROR) {
if (!argp) return { true, EINVAL };
int play_underruns = 0;
monitor().monitor([&] {
@ -1305,6 +1310,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_GETISPACE) {
if (!argp) return { true, EINVAL };
/* dummy implementation */
audio_buf_info &abinfo = *(audio_buf_info *)argp;
@ -1319,6 +1326,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_GETOPTR) {
if (!argp) return { true, EINVAL };
/* dummy implementation */
count_info &ci = *(count_info *)argp;
@ -1332,6 +1341,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_GETOSPACE) {
if (!argp) return { true, EINVAL };
monitor().monitor([&] {
_with_info(*fd, [&] (Xml_node info) {
if (info.type() != "oss") {
@ -1373,6 +1384,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_GETPLAYVOL) {
if (!argp) return { true, EINVAL };
/* dummy implementation */
int *vol = (int *)argp;
@ -1383,6 +1396,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_LOW_WATER) {
if (!argp) return { true, EINVAL };
/* dummy implementation */
int *val = (int *)argp;
@ -1404,9 +1419,12 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_RESET) {
handled = true;
warning("SNDCTL_DSP_RESET handled=", handled, " result=", result);
} else if (request == SNDCTL_DSP_SAMPLESIZE) {
if (!argp) return { true, EINVAL };
monitor().monitor([&] {
_with_info(*fd, [&] (Xml_node info) {
if (info.type() != "oss") {
@ -1435,6 +1453,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_SETFRAGMENT) {
if (!argp) return { true, EINVAL };
int *frag = (int *)argp;
int max_fragments = *frag >> 16;
int size_selector = *frag & ((1<<16) - 1);
@ -1492,6 +1512,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_SETPLAYVOL) {
if (!argp) return { true, EINVAL };
/* dummy implementation */
int *vol = (int *)argp;
@ -1502,12 +1524,16 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
} else if (request == SNDCTL_DSP_SETTRIGGER) {
if (!argp) return { true, EINVAL };
/* dummy implementation */
handled = true;
} else if (request == SNDCTL_DSP_SPEED) {
if (!argp) return { true, EINVAL };
monitor().monitor([&] {
_with_info(*fd, [&] (Xml_node info) {
if (info.type() != "oss") {
@ -1540,8 +1566,41 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
return Fn::COMPLETE;
});
} else if (request == SNDCTL_DSP_SYNC) {
/*
* SNDCTL_DSP_SYNC should be implemented like follows, but we disabled
* the implementation and just return for two reasons. The VirtualBox 6
* backend requires the sync operation to complete with very tight
* timing in a special thread, which our current implementation can't
* assure. Also, the OSS documentation (and examples) advise against the
* use of this feature in new programs.
*/
if (0) monitor().monitor([&] {
auto result = Fn::INCOMPLETE;
_with_info(*fd, [&] (Xml_node info) {
if (info.type() != "oss") return;
unsigned int const ofrag_avail =
info.attribute_value("ofrag_avail", 0U);
unsigned int const ofrag_total =
info.attribute_value("ofrag_total", 0U);
result = (ofrag_avail == ofrag_total ? Fn::COMPLETE : Fn::INCOMPLETE);
});
return result;
});
handled = true;
} else if (request == SNDCTL_SYSINFO) {
if (!argp) return { true, EINVAL };
/* dummy implementation */
oss_sysinfo *si = (oss_sysinfo *)argp;
@ -1554,6 +1613,8 @@ Libc::Vfs_plugin::_ioctl_sndctl(File_descriptor *fd, unsigned long request, char
* Either handled or a failed attempt will mark the I/O control
* as handled.
*/
if (request == SNDCTL_DSP_RESET)
warning("SNDCTL_DSP_RESET handled=", handled, " result=", result);
return { handled || result != 0, result };
}
@ -1590,6 +1651,7 @@ int Libc::Vfs_plugin::ioctl(File_descriptor *fd, unsigned long request, char *ar
case SNDCTL_DSP_SETPLAYVOL:
case SNDCTL_DSP_SETTRIGGER:
case SNDCTL_DSP_SPEED:
case SNDCTL_DSP_SYNC:
case SNDCTL_SYSINFO:
result = _ioctl_sndctl(fd, request, argp);
break;
@ -1598,6 +1660,8 @@ int Libc::Vfs_plugin::ioctl(File_descriptor *fd, unsigned long request, char *ar
}
if (result.handled) {
if (result.error)
error("XXXXX error=", result.error, " request=", Hex(request), "/", (request==SNDCTL_DSP_RESET?"":"!"), "SNDCTL_DSP_RESET");
return result.error ? Errno(result.error) : 0;
}