kernel/linux.git/sound/synth, branch v6.6.131

ALSA: emux: improve patch ioctl data validation

2024-07-05T07:33:52+00:00

[ Upstream commit 89b32ccb12ae67e630c6453d778ec30a592a212f ] In load_data(), make the validation of and skipping over the main info block match that in load_guspatch(). In load_guspatch(), add checking that the specified patch length matches the actually supplied data, like load_data() already did. Signed-off-by: Oswald Buddenhagen Message-ID: <20240406064830.1029573-8-oswald.buddenhagen@gmx.de> Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin

ALSA: emu10k1: fix synthesizer pitch for E-MU cards at 44.1 kHz

2023-06-13T05:42:08+00:00

This is only a very partial fix - the frequency-dependent envelope & LFO register values aren't adjusted. But I'm not sure they were even correct at 48 kHz to start with, as most of them are precalculated by common code which assumes an EMU8K-specific 44.1 kHz word clock, and it seems somewhat unlikely that the hardware's register interpretation was adjusted to compensate for the different word clock. In any case I'm not going to spend time on fixing that, as this code is unlikely to be actually used by anyone today. Signed-off-by: Oswald Buddenhagen Link: https://lore.kernel.org/r/20230612191325.1315854-6-oswald.buddenhagen@gmx.de Signed-off-by: Takashi Iwai

ALSA: emux: Avoid potential array out-of-bound in snd_emux_xg_control()

2023-02-07T13:32:33+00:00

snd_emux_xg_control() can be called with an argument 'param' greater than size of 'control' array. It may lead to accessing 'control' array at a wrong index. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Artemii Karasev Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: Link: https://lore.kernel.org/r/20230207132026.2870-1-karasev@ispras.ru Signed-off-by: Takashi Iwai

treewide: Convert del_timer() to timer_shutdown()

2022-12-25T21:38:09+00:00

Due to several bugs caused by timers being re-armed after they are shutdown and just before they are freed, a new state of timers was added called "shutdown". After a timer is set to this state, then it can no longer be re-armed. The following script was run to find all the trivial locations where del_timer() or del_timer_sync() is called in the same function that the object holding the timer is freed. It also ignores any locations where the timer->function is modified between the del_timer*() and the free(), as that is not considered a "trivial" case. This was created by using a coccinelle script and the following commands: $ cat timer.cocci @@ expression ptr, slab; identifier timer, rfield; @@ ( - del_timer(&ptr->timer); + timer_shutdown(&ptr->timer); | - del_timer_sync(&ptr->timer); + timer_shutdown_sync(&ptr->timer); ) ... when strict when != ptr->timer ( kfree_rcu(ptr, rfield); | kmem_cache_free(slab, ptr); | kfree(ptr); ) $ spatch timer.cocci . > /tmp/t.patch $ patch -p1 < /tmp/t.patch Link: https://lore.kernel.org/lkml/20221123201306.823305113@linutronix.de/ Signed-off-by: Steven Rostedt (Google) Acked-by: Pavel Machek [ LED ] Acked-by: Kalle Valo [ wireless ] Acked-by: Paolo Abeni [ networking ] Signed-off-by: Linus Torvalds

ALSA: Use del_timer_sync() before freeing timer

2022-10-27T06:42:08+00:00

The current code for freeing the emux timer is extremely dangerous: CPU0 CPU1 ---- ---- snd_emux_timer_callback() snd_emux_free() spin_lock(&emu->voice_lock) del_timer(&emu->tlist); <-- returns immediately spin_unlock(&emu->voice_lock); [..] kfree(emu); spin_lock(&emu->voice_lock); [BOOM!] Instead just use del_timer_sync() which will wait for the timer to finish before continuing. No need to check if the timer is active or not when doing so. This doesn't fix the race of a possible re-arming of the timer, but at least it won't use the data that has just been freed. [ Fixed unused variable warning by tiwai ] Cc: stable@vger.kernel.org Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Steven Rostedt (Google) Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20221026231236.6834b551@gandalf.local.home Signed-off-by: Takashi Iwai

ALSA: synth: missing check for possible NULL after the call to kstrdup

2021-11-09T06:18:50+00:00

If kcalloc() return NULL due to memory starvation, it is possible for kstrdup() to return NULL in similar case. So add null check after the call to kstrdup() is made. [ minor coding-style fix by tiwai ] Signed-off-by: Austin Kim Cc: Link: https://lore.kernel.org/r/20211109003742.GA5423@raspberrypi Signed-off-by: Takashi Iwai

ALSA: emux: fix spelling mistakes

2021-07-05T17:34:22+00:00

Fix some spelling mistakes as follows: sensitivies ==> sensitivities pararameters ==> parameters approxmimation ==> approximation silet ==> silent Signed-off-by: gushengxian Link: https://lore.kernel.org/r/20210705125001.665734-1-gushengxian507419@gmail.com Signed-off-by: Takashi Iwai

ALSA: synth: Fix assignment in if condition

2021-06-09T15:30:35+00:00

EMUx synth driver code contains lots of assignments in if condition, which is a bad coding style that may confuse readers and occasionally lead to bugs. This patch is merely for coding-style fixes, no functional changes. Link: https://lore.kernel.org/r/20210608140540.17885-64-tiwai@suse.de Signed-off-by: Takashi Iwai

ALSA: emux: More constifications

2020-01-05T15:14:46+00:00

Apply const prefix to each possible place: the MIDI data definitions, the static tables for volume parameters, etc. Just for minor optimization and no functional changes. Link: https://lore.kernel.org/r/20200105144823.29547-22-tiwai@suse.de Signed-off-by: Takashi Iwai

ALSA: seq: oss: Constify snd_seq_oss_callback definitions

2020-01-03T08:24:41+00:00

The snd_seq_oss_callback items are just copied to another struct as-is, hence they can be declared as const. There should be no functional changes by this patch. Link: https://lore.kernel.org/r/20200103081714.9560-53-tiwai@suse.de Signed-off-by: Takashi Iwai