Re: general protection fault in snd_ctl_release

2020-09-02 Thread Takashi Iwai
On Wed, 02 Sep 2020 17:46:58 +0200, Takashi Iwai wrote: > > > See vfs.git#work.epoll > > for fix > > Thanks! I'll try to run with this fix. Just confirming that the patch worked. And I saw you've already sent a pull request to Linus, thanks! Takashi

Re: general protection fault in snd_ctl_release

2020-09-02 Thread Takashi Iwai
On Wed, 02 Sep 2020 17:35:30 +0200, Al Viro wrote: > > On Wed, Sep 02, 2020 at 05:22:00PM +0200, Takashi Iwai wrote: > > > Marc, Al, could you guys check this bug? > > That's racy; the first one should be get_file_rcu() instead of > file_count()+get_file(), the second is not needed at all (we >

Re: general protection fault in snd_ctl_release

2020-09-02 Thread Al Viro
On Wed, Sep 02, 2020 at 05:22:00PM +0200, Takashi Iwai wrote: > Marc, Al, could you guys check this bug? That's racy; the first one should be get_file_rcu() instead of file_count()+get_file(), the second is not needed at all (we have the file pinned down by the caller). See vfs.git#work.epoll

Re: general protection fault in snd_ctl_release

2020-09-02 Thread Takashi Iwai
On Wed, 02 Sep 2020 08:57:22 +0200, syzbot wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit:b51594df Merge tag 'docs-5.9-3' of git://git.lwn.net/linux > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=172fea1590 > kernel

general protection fault in snd_ctl_release

2020-09-02 Thread syzbot
Hello, syzbot found the following issue on: HEAD commit:b51594df Merge tag 'docs-5.9-3' of git://git.lwn.net/linux git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=172fea1590 kernel config: https://syzkaller.appspot.com/x/.config?x=3c5f6ce8d5b68299