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From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
To: viro@ZenIV.linux.org.uk
Cc: syzbot+7a1cff37dbbef9e7ba4c@syzkaller.appspotmail.com,
	akpm@linux-foundation.org, dhowells@redhat.com,
	ebiederm@xmission.com, ebiggers3@gmail.com, gs051095@gmail.com,
	ktkhai@virtuozzo.com, linux-kernel@vger.kernel.org,
	oleg@redhat.com, pasha.tatashin@oracle.com, riel@redhat.com,
	rppt@linux.vnet.ibm.com, syzkaller-bugs@googlegroups.com,
	wangkefeng.wang@huawei.com
Subject: Re: KASAN: use-after-free Read in alloc_pid
Date: Tue, 10 Apr 2018 23:33:41 +0900	[thread overview]
Message-ID: <201804102333.BCC87582.MFHFOQFOOJLVtS@I-love.SAKURA.ne.jp> (raw)
In-Reply-To: <000000000000a45f6f05697f173b@google.com>

syzbot wrote:
> syzbot has found reproducer for the following crash on upstream commit
> c18bb396d3d261ebbb4efbc05129c5d354c541e4 (Tue Apr 10 00:04:10 2018 +0000)
> Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
> syzbot dashboard link:  
> https://syzkaller.appspot.com/bug?extid=7a1cff37dbbef9e7ba4c
> 
While we are waiting for

  rpc_pipefs: fix double-dput()
  rpc_pipefs: deal with early sget() failures
  kernfs: deal with early sget() failures
  procfs: deal with early sget() failures
  orangefs_kill_sb(): deal with allocation failures
  nfsd_umount(): deal with early sget() failures
  nfs: avoid double-free on early sget() failures
  jffs2_kill_sb(): deal with failed allocations
  hypfs_kill_super(): deal with failed allocations

in https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/log/?h=for-linus ,
I think the patch at

  WARNING in kill_block_super
  https://syzkaller.appspot.com/bug?id=588996a25a2587be2e3a54e8646728fb9cae44e7

is better.

  reply	other threads:[~2018-04-10 14:34 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-01  8:21 syzbot
2018-04-02 23:00 ` Eric W. Biederman
2018-04-03  3:10   ` Eric Biggers
2018-04-03 10:45     ` Tetsuo Handa
2018-04-10 14:11 ` syzbot
2018-04-10 14:33   ` Tetsuo Handa [this message]
2018-04-21 10:43     ` Tetsuo Handa
2018-04-24 16:33       ` Eric W. Biederman

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