The branch main has been updated by mjg:
URL:
https://cgit.FreeBSD.org/src/commit/?id=0d9e99ce3b1071c76ff5a2d9d4158341c0371c2f
commit 0d9e99ce3b1071c76ff5a2d9d4158341c0371c2f
Author: Mateusz Guzik <m...@freebsd.org>
AuthorDate: 2021-09-18 08:12:27 +0000
Commit: Mateusz Guzik <m...@freebsd.org>
CommitDate: 2021-09-18 19:13:51 +0000
vfs: add the missing vnode interlock in vfs_mountroot_shuffle
Around v_mountedhere assignment.
---
sys/kern/vfs_mountroot.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/sys/kern/vfs_mountroot.c b/sys/kern/vfs_mountroot.c
index e2a687511e11..5cf222901420 100644
--- a/sys/kern/vfs_mountroot.c
+++ b/sys/kern/vfs_mountroot.c
@@ -367,10 +367,12 @@ vfs_mountroot_shuffle(struct thread *td, struct mount
*mpdevfs)
error = vinvalbuf(vp, V_SAVE, 0, 0);
if (!error) {
cache_purge(vp);
+ VI_LOCK(vp);
mporoot->mnt_vnodecovered = vp;
vp->v_mountedhere = mporoot;
strlcpy(mporoot->mnt_stat.f_mntonname,
fspath, MNAMELEN);
+ VI_UNLOCK(vp);
VOP_UNLOCK(vp);
} else
vput(vp);
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