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authorTakashi Iwai <tiwai@suse.de>2017-03-21 13:56:04 +0100
committerTakashi Iwai <tiwai@suse.de>2017-03-21 14:01:10 +0100
commitc520ff3d03f0b5db7146d9beed6373ad5d2a5e0e (patch)
treeded14dbde99a6392416d92153ebfa248a2493616 /drivers/input/rmi4
parentALSA: x86: Make CONFIG_SND_X86 bool (diff)
downloadlinux-c520ff3d03f0b5db7146d9beed6373ad5d2a5e0e.tar.xz
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ALSA: seq: Fix racy cell insertions during snd_seq_pool_done()
When snd_seq_pool_done() is called, it marks the closing flag to refuse the further cell insertions. But snd_seq_pool_done() itself doesn't clear the cells but just waits until all cells are cleared by the caller side. That is, it's racy, and this leads to the endless stall as syzkaller spotted. This patch addresses the racy by splitting the setup of pool->closing flag out of snd_seq_pool_done(), and calling it properly before snd_seq_pool_done(). BugLink: http://lkml.kernel.org/r/CACT4Y+aqqy8bZA1fFieifNxR2fAfFQQABcBHj801+u5ePV0URw@mail.gmail.com Reported-and-tested-by: Dmitry Vyukov <dvyukov@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'drivers/input/rmi4')
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