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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 |
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| client.c | ||
| error.c | ||
| Kconfig | ||
| Makefile | ||
| mod.c | ||
| protocol.c | ||
| protocol.h | ||
| trans_common.c | ||
| trans_common.h | ||
| trans_fd.c | ||
| trans_rdma.c | ||
| trans_virtio.c | ||
| trans_xen.c | ||