Messages in this thread | | | Date | Fri, 10 Jul 2020 13:12:32 +0200 | From | Dominique Martinet <> | Subject | Re: [PATCH] net/9p: validate fds in p9_fd_open |
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Christoph Hellwig wrote on Fri, Jul 10, 2020: > p9_fd_open just fgets file descriptors passed in from userspace, but > doesn't verify that they are valid for read or writing. This gets > cought down in the VFS when actually attemping a read or write, but a > new warning added in linux-next upsets syzcaller. > > Fix this by just verifying the fds early on. > > Reported-by: syzbot+e6f77e16ff68b2434a2c@syzkaller.appspotmail.com > Signed-off-by: Christoph Hellwig <hch@lst.de>
Looks good to me, I'll pick it up shortly.
-- Dominique
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