D60283.id188566.diff
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D60283.id188566.diff
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	diff --git a/sys/kern/coredump_vnode.c b/sys/kern/coredump_vnode.c
	--- a/sys/kern/coredump_vnode.c
	+++ b/sys/kern/coredump_vnode.c
	@@ -68,6 +68,7 @@
	#include <sys/fcntl.h>
	#include <sys/jail.h>
	#include <sys/limits.h>
	+#include <sys/mount.h>
	#include <sys/namei.h>
	#include <sys/proc.h>
	#include <sys/sbuf.h>
	@@ -435,6 +436,7 @@
	struct proc *p = td->td_proc;
	struct ucred *cred = td->td_ucred;
	struct vnode *vp;
	+ struct mount *mp;
	struct coredump_vnode_ctx wctx;
	struct coredump_writer cdw = { };
	struct flock lf;
	@@ -470,6 +472,17 @@
	goto out;
	}

	+ /*
	+ * If the /dev/ufssuspend owner faulted, work around it.
	+ */
	+ mp = vp->v_mount;
	+ if (mp != NULL && (mp->mnt_kern_flag & (MNTK_SUSPEND \|
	+ MNTK_SUSPENDED)) != 0 && mp->mnt_susp_owner->td_proc == p) {
	+ VOP_UNLOCK(vp);
	+ error = EBUSY;
	+ goto out;
	+ }
	+
	VOP_UNLOCK(vp);

	/* Postpone other writers, including core dumps of other processes. */