diff options
author | Dominique Martinet <dominique.martinet@cea.fr> | 2018-11-05 09:52:48 +0100 |
---|---|---|
committer | Dominique Martinet <dominique.martinet@cea.fr> | 2018-12-25 17:07:49 +0900 |
commit | 574d356b7a02c7e1b01a1d9cba8a26b3c2888f45 (patch) | |
tree | 58624999ebadfabc02b63ee7f875cfe0fcadbf64 /net/sunrpc/socklib.c | |
parent | 52ad259eaac0454c1ac7123e7148cf8d6e6f5301 (diff) | |
download | linux-574d356b7a02c7e1b01a1d9cba8a26b3c2888f45.tar.bz2 |
9p/net: put a lower bound on msize
If the requested msize is too small (either from command line argument
or from the server version reply), we won't get any work done.
If it's *really* too small, nothing will work, and this got caught by
syzbot recently (on a new kmem_cache_create_usercopy() call)
Just set a minimum msize to 4k in both code paths, until someone
complains they have a use-case for a smaller msize.
We need to check in both mount option and server reply individually
because the msize for the first version request would be unchecked
with just a global check on clnt->msize.
Link: http://lkml.kernel.org/r/1541407968-31350-1-git-send-email-asmadeus@codewreck.org
Reported-by: syzbot+0c1d61e4db7db94102ca@syzkaller.appspotmail.com
Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Cc: stable@vger.kernel.org
Diffstat (limited to 'net/sunrpc/socklib.c')
0 files changed, 0 insertions, 0 deletions