04b2d9c9c3
In hwdep interface of firewire-tascam driver, accessing to user space is in a critical section with disabled local interrupt. Depending on architecture, accessing to user space can cause page fault exception. Then local processor stores machine status and handle the synchronous event. A handler corresponding to the event can call task scheduler to wait for preparing pages. In a case of usage of single core processor, the state to disable local interrupt is worse because it doesn't handle usual interrupts from hardware. This commit fixes this bug, by performing the accessing outside spinlock. Reported-by: Vaishali Thakkar <vaishali.thakkar@oracle.com> Cc: stable@vger.kernel.org Fixes: e5e0c3dd257b('ALSA: firewire-tascam: add hwdep interface') Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de> |
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| .. | ||
| Makefile | ||
| amdtp-tascam.c | ||
| tascam-hwdep.c | ||
| tascam-midi.c | ||
| tascam-pcm.c | ||
| tascam-proc.c | ||
| tascam-stream.c | ||
| tascam-transaction.c | ||
| tascam.c | ||
| tascam.h | ||