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To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org,
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From: Rick Macklem <rmacklem@FreeBSD.org>
Subject: git: 3fe2c68ba20f - main - nfsclient: fix panic in cache_enter_time()
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The branch main has been updated by rmacklem:
URL: https://cgit.FreeBSD.org/src/commit/?id=3fe2c68ba20fb3365ef91e0b85f88237b5369f38
commit 3fe2c68ba20fb3365ef91e0b85f88237b5369f38
Author: Rick Macklem <rmacklem@FreeBSD.org>
AuthorDate: 2021-02-28 01:54:05 +0000
Commit: Rick Macklem <rmacklem@FreeBSD.org>
CommitDate: 2021-02-28 01:54:05 +0000
nfsclient: fix panic in cache_enter_time()
Juraj Lutter (otis@) reported a panic "dvp != vp not true" in
cache_enter_time() called from the NFS client's nfsrpc_readdirplus()
function.
This is specific to an NFSv3 mount with the "rdirplus" mount
option. Unlike NFSv4, NFSv3 replies to ReaddirPlus
includes entries for the current directory.
This trivial patch avoids doing a cache_enter_time()
call for the current directory to avoid the panic.
Reported by: otis
Tested by: otis
Reviewed by: mjg
MFC after: 3 days
Differential Revision: https://reviews.freebsd.org/D28969
---
sys/fs/nfsclient/nfs_clrpcops.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/sys/fs/nfsclient/nfs_clrpcops.c b/sys/fs/nfsclient/nfs_clrpcops.c
index b4f2d5301d13..c95d4dc58e7a 100644
--- a/sys/fs/nfsclient/nfs_clrpcops.c
+++ b/sys/fs/nfsclient/nfs_clrpcops.c
@@ -3761,6 +3761,7 @@ nfsrpc_readdirplus(vnode_t vp, struct uio *uiop, nfsuint64 *cookiep,
ndp->ni_vp = newvp;
NFSCNHASH(cnp, HASHINIT);
if (cnp->cn_namelen <= NCHNAMLEN &&
+ ndp->ni_dvp != ndp->ni_vp &&
(newvp->v_type != VDIR ||
dctime.tv_sec != 0)) {
cache_enter_time(ndp->ni_dvp,