Date: Thu, 30 Oct 2025 01:05:25 GMT From: Rick Macklem <rmacklem@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: b5b6ddfc9981 - stable/15 - nfs_clrpcops.c: Check for too large a write reply Message-ID: <202510300105.59U15Pvx007668@gitrepo.freebsd.org>
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The branch stable/15 has been updated by rmacklem: URL: https://cgit.FreeBSD.org/src/commit/?id=b5b6ddfc9981f9675cd165fc91d00c205282b716 commit b5b6ddfc9981f9675cd165fc91d00c205282b716 Author: Rick Macklem <rmacklem@FreeBSD.org> AuthorDate: 2025-10-27 14:49:32 +0000 Commit: Rick Macklem <rmacklem@FreeBSD.org> CommitDate: 2025-10-30 01:02:41 +0000 nfs_clrpcops.c: Check for too large a write reply The "rlen" reply length for a Write operation/RPC could cause trouble if a broken server replies with too large a value. Improve the sanity check for "rlen" to avoid this. (cherry picked from commit 2c82cdd2e29f8ba00d4289f36f8baa1598a1ad9b) --- sys/fs/nfsclient/nfs_clrpcops.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/sys/fs/nfsclient/nfs_clrpcops.c b/sys/fs/nfsclient/nfs_clrpcops.c index 06e9d9f87628..ec0d3713dc9f 100644 --- a/sys/fs/nfsclient/nfs_clrpcops.c +++ b/sys/fs/nfsclient/nfs_clrpcops.c @@ -2212,7 +2212,7 @@ nfsrpc_writerpc(vnode_t vp, struct uio *uiop, int *iomode, NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); rlen = fxdr_unsigned(int, *tl++); - if (rlen == 0) { + if (rlen <= 0 || rlen > len) { error = NFSERR_IO; goto nfsmout; } else if (rlen < len) { @@ -7254,7 +7254,7 @@ nfsrpc_writeds(vnode_t vp, struct uio *uiop, int *iomode, int *must_commit, NFSM_DISSECT(tl, uint32_t *, 2 * NFSX_UNSIGNED + NFSX_VERF); rlen = fxdr_unsigned(int, *tl++); NFSCL_DEBUG(4, "nfsrpc_writeds: len=%d rlen=%d\n", len, rlen); - if (rlen == 0) { + if (rlen <= 0 || rlen > len) { error = NFSERR_IO; goto nfsmout; } else if (rlen < len) {home | help
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