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SUNRPC: Fix READ_PLUS crasher
authorChuck Lever <chuck.lever@oracle.com>
Thu, 30 Jun 2022 20:48:18 +0000 (16:48 -0400)
committerChuck Lever <chuck.lever@oracle.com>
Thu, 30 Jun 2022 21:41:08 +0000 (17:41 -0400)
commita23dd544debcda4ee4a549ec7de59e85c3c8345c
treeaa3b6b3a3a446080d8a9d66e65d70689f1bacea3tree
parent8a9ffb8c857c2c99403bd6483a5a005fed5c0773commit | diff
SUNRPC: Fix READ_PLUS crasher

Looks like there are still cases when "space_left - frag1bytes" can
legitimately exceed PAGE_SIZE. Ensure that xdr->end always remains
within the current encode buffer.

Reported-by: Bruce Fields <bfields@fieldses.org>
Reported-by: Zorro Lang <zlang@redhat.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=216151
Fixes: 6c254bf3b637 ("SUNRPC: Fix the calculation of xdr->end in xdr_get_next_encode_buffer()")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
net/sunrpc/xdr.c diff | blob | history
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