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Christoph Hellwig e0c47a51fc net/9p: validate fds in p9_fd_open 
[ Upstream commit a39c46067c ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2020-08-11 15:33:36 +02:00
..
Kconfig
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Makefile
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client.c 9p: Transport error uninitialized 2019-09-03 11:05:34 +00:00
error.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188 2019-05-30 11:29:21 -07:00
mod.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188 2019-05-30 11:29:21 -07:00
protocol.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188 2019-05-30 11:29:21 -07:00
protocol.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 188 2019-05-30 11:29:21 -07:00
trans_common.c
…
trans_common.h
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trans_fd.c net/9p: validate fds in p9_fd_open 2020-08-11 15:33:36 +02:00
trans_rdma.c rdma: Enable ib_alloc_cq to spread work over a device's comp_vectors 2019-08-05 11:50:32 -04:00
trans_virtio.c 9p pull request for inclusion in 5.13 2019-07-12 17:31:19 -07:00
trans_xen.c 9p pull request for inclusion in 5.13 2019-07-12 17:31:19 -07:00