kernel_optimize_test/sound/core/seq/oss
Gustavo A. R. Silva c709f14f06 ALSA: seq: oss: Fix Spectre v1 vulnerability
dev is indirectly controlled by user-space, hence leading to
a potential exploitation of the Spectre variant 1 vulnerability.

This issue was detected with the help of Smatch:

sound/core/seq/oss/seq_oss_synth.c:626 snd_seq_oss_synth_make_info() warn: potential spectre issue 'dp->synths' [w] (local cap)

Fix this by sanitizing dev before using it to index dp->synths.

Notice that given that speculation windows are large, the policy is
to kill the speculation on the first load and not worry if it can be
completed with a dependent load/store [1].

[1] https://lore.kernel.org/lkml/20180423164740.GY17484@dhcp22.suse.cz/

Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2019-03-21 13:23:51 +01:00
..
Makefile
seq_oss_device.h sound: annotate ->poll() instances 2017-11-27 16:20:02 -05:00
seq_oss_event.c ALSA: seq: oss: Hardening for potential Spectre v1 2018-04-25 10:37:45 +02:00
seq_oss_event.h
seq_oss_init.c
seq_oss_ioctl.c
seq_oss_midi.c ALSA: seq: Minor cleanup of MIDI event parser helpers 2018-08-01 22:54:35 +02:00
seq_oss_midi.h
seq_oss_readq.c
seq_oss_readq.h
seq_oss_rw.c vfs: do bulk POLL* -> EPOLL* replacement 2018-02-11 14:34:03 -08:00
seq_oss_synth.c ALSA: seq: oss: Fix Spectre v1 vulnerability 2019-03-21 13:23:51 +01:00
seq_oss_synth.h ALSA: seq: oss: Hardening for potential Spectre v1 2018-04-25 10:37:45 +02:00
seq_oss_timer.c ALSA: seq: oss: Use the standard fall-through annotation 2018-10-12 09:31:29 +02:00
seq_oss_timer.h
seq_oss_writeq.c
seq_oss_writeq.h
seq_oss.c ALSA: seq: Fix poll() error return 2018-07-26 08:23:26 +02:00