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| author |   Christoph Hellwig <hch@lst.de> | 2020-07-10 10:57:22 +0200 |
|---|---|---|
| committer |   Dominique Martinet <asmadeus@codewreck.org> | 2020-07-19 14:58:29 +0200 |
| commit | a39c46067c845a8a2d7144836e9468b7f072343e (patch) | |
| tree | 3a1695a936e75161787df3a635ef3f474d5a7b83 /COPYING | |
| parent | Linux 5.8-rc5 (diff) | |
| download | linux-dev-a39c46067c845a8a2d7144836e9468b7f072343e.tar.xz linux-dev-a39c46067c845a8a2d7144836e9468b7f072343e.zip | |
net/9p: validate fds in p9_fd_open
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 attempting a read or write, but
a new warning added in linux-next upsets syzcaller.
Fix this by just verifying the fds early on.
Link: http://lkml.kernel.org/r/20200710085722.435850-1-hch@lst.de
Reported-by: syzbot+e6f77e16ff68b2434a2c@syzkaller.appspotmail.com
Signed-off-by: Christoph Hellwig <hch@lst.de>
[Dominique: amend goto as per Doug Nazar's review]
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions