[alsa-devel] KASAN: slab-out-of-bounds Read in linear_transfer

[syzbot]

syzbot has bisected this bug to:

commit 65766ee0bf7fe8b3be80e2e1c3ef54ad59b29476
Author: Takashi Iwai <tiwai at suse.de>
Date:   Fri Nov 9 10:59:45 2018 +0000

     ALSA: oss: Use kvzalloc() for local buffer allocations

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11b70c2b200000
start commit:   65766ee0 ALSA: oss: Use kvzalloc() for local buffer alloca..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=13b70c2b200000
console output: https://syzkaller.appspot.com/x/log.txt?x=15b70c2b200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=7e1aaa1cfbfe1abf
dashboard link: https://syzkaller.appspot.com/bug?extid=a39b5d3c50e55e24fb4d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=113945fb200000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12ed3cf7200000

Reported-by: syzbot+a39b5d3c50e55e24fb4d at syzkaller.appspotmail.com
Fixes: 65766ee0 ("ALSA: oss: Use kvzalloc() for local buffer allocations")