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9p: do not crash on unknown lock status code
authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Mon, 29 Dec 2014 13:00:19 +0000 (15:00 +0200)
committerEric Van Hensbergen <ericvh@gmail.com>
Fri, 20 Mar 2015 14:34:41 +0000 (07:34 -0700)
Current 9p implementation will crash whole system if sees unknown lock
status code. It's trivial target for DOS: 9p server can produce such
code easily.

Let's fallback more gracefully: warning in dmesg + -ENOLCK.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
fs/9p/vfs_file.c patch | blob | history

diff --cc fs/9p/vfs_file.c
Simple merge
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