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2015-04-18sound/oss: fix deadlock in sequencer_ioctl(SNDCTL_SEQ_OUTOFBAND)Alexey Khoroshilov
A deadlock can be initiated by userspace via ioctl(SNDCTL_SEQ_OUTOFBAND) on /dev/sequencer with TMR_ECHO midi event. In this case the control flow is: sound_ioctl() -> case SND_DEV_SEQ: case SND_DEV_SEQ2: sequencer_ioctl() -> case SNDCTL_SEQ_OUTOFBAND: spin_lock_irqsave(&lock,flags); play_event(); -> case EV_TIMING: seq_timing_event() -> case TMR_ECHO: seq_copy_to_input() -> spin_lock_irqsave(&lock,flags); It seems that spin_lock_irqsave() around play_event() is not necessary, because the only other call location in seq_startplay() makes the call without acquiring spinlock. So, the patch just removes spinlocks around play_event(). By the way, it removes unreachable code in seq_timing_event(), since (seq_mode == SEQ_2) case is handled in the beginning. Compile tested only. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-04-04sound/oss: Remove uncompilable DBG macro useJoe Perches
Most of it duplicates function tracing and one of them has an uncompilable printf %P use. Others have format/argument mismatches. Remove unused DBG1 macro definition Neaten uart401.c use of ok test around this DBG macro removal. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-01-14sound: oss: remove last sleep_on usersArnd Bergmann
There are three files in oss for which I could not find an easy way to replace interruptible_sleep_on_timeout with a non-racy version. This patch instead just adds a private implementation of the function, now named oss_broken_sleep_on, and changes over the remaining users in sound/oss/ so we can remove the global interface. [fixed coding style warnings by tiwai] Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2013-03-15sound: sequencer: cap array index in seq_chn_common_event()Dan Carpenter
"chn" here is a number between 0 and 255, but ->chn_info[] only has 16 elements so there is a potential write beyond the end of the array. If the seq_mode isn't SEQ_2 then we let the individual drivers (either opl3.c or midi_synth.c) handle it. Those functions all do a bounds check on "chn" so I haven't changed anything here. The opl3.c driver has up to 18 channels and not 16. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2011-03-23sound/oss: remove offset from load_patch callbacksDan Rosenberg
Was: [PATCH] sound/oss/midi_synth: prevent underflow, use of uninitialized value, and signedness issue The offset passed to midi_synth_load_patch() can be essentially arbitrary. If it's greater than the header length, this will result in a copy_from_user(dst, src, negative_val). While this will just return -EFAULT on x86, on other architectures this may cause memory corruption. Additionally, the length field of the sysex_info structure may not be initialized prior to its use. Finally, a signed comparison may result in an unintentionally large loop. On suggestion by Takashi Iwai, version two removes the offset argument from the load_patch callbacks entirely, which also resolves similar issues in opl3. Compile tested only. v3 adjusts comments and hopefully gets copy offsets right. Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-11-11sound/oss: Remove unnecessary casts of void ptrJesper Juhl
The [vk][cmz]alloc(_node) family of functions return void pointers which it's completely unnecessary/pointless to cast to other pointer types since that happens implicitly. This patch removes such casts from sound/oss/ Signed-off-by: Jesper Juhl <jj@chaosbits.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2010-03-16sound: sequencer: clean up remove bogus checkDan Carpenter
A few lines earlier bend is limited to 2399. So semitones is always less than 24 here. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2009-02-26sound/oss: fix sparse warning: symbol shadows an earlier oneHannes Eder
Impact: Move variable to a more inner scope. Fix this sparse warning: sound/oss/sequencer.c:235:29: warning: symbol 'err' shadows an earlier one sound/oss/sequencer.c:215:13: originally declared here Signed-off-by: Hannes Eder <hannes@hanneseder.net> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2006-10-04[PATCH] kill sound/oss/*_syms.cAdrian Bunk
Move all EXPORT_SYMBOL's from sound/oss/*_syms.c to the files with the actual functions. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-04[PATCH] The scheduled removal of some OSS driversAdrian Bunk
This patch contains the scheduled removal of OSS drivers that: - have ALSA drivers for the same hardware without known regressions and - whose Kconfig options have been removed in 2.6.17. [michal.k.k.piotrowski@gmail.com: build fix] Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Cc: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-03fix file specification in commentsUwe Zeisberger
Many files include the filename at the beginning, serveral used a wrong one. Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-03-28[PATCH] no need to check vfree arg for null in oss/sequencerJesper Juhl
There's no need to check pointers for NULL before handing them to vfree(). Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-25[PATCH] Fix sequencer missing negative bound checkEugene Teo
'int dev' came out of an 'unsigned char *' - as such, it will not get a negative value. Thanks Valdis. Signed-off-by: Eugene Teo <eugene.teo@eugeneteo.net> Cc: Jaroslav Kysela <perex@suse.cz> Acked-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-16Linux-2.6.12-rc2Linus Torvalds
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!