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Index: sys/kern/kern_descrip.c
===================================================================
--- sys/kern/kern_descrip.c
+++ sys/kern/kern_descrip.c
@@ -4194,6 +4194,8 @@
if (fdp == NULL)
continue;
FILEDESC_SLOCK(fdp);
+ if (refcount_load(&fdp->fd_refcnt) == 0)
+ goto nextproc;
FILEDESC_FOREACH_FP(fdp, n, fp) {
if (refcount_load(&fdp->fd_refcnt) == 0)
break;
@@ -4210,6 +4212,7 @@
if (error)
break;
}
+nextproc:
FILEDESC_SUNLOCK(fdp);
fddrop(fdp);
if (error)
@@ -4469,6 +4472,8 @@
if (pwd != NULL)
pwd_drop(pwd);
FILEDESC_SLOCK(fdp);
+ if (refcount_load(&fdp->fd_refcnt) == 0)
+ goto skip;
FILEDESC_FOREACH_FP(fdp, i, fp) {
if (refcount_load(&fdp->fd_refcnt) == 0)
break;
@@ -4487,6 +4492,7 @@
if (error != 0)
break;
}
+skip:
FILEDESC_SUNLOCK(fdp);
fail:
if (fdp != NULL)
@@ -4633,6 +4639,8 @@
if (pwd != NULL)
pwd_drop(pwd);
FILEDESC_SLOCK(fdp);
+ if (refcount_load(&fdp->fd_refcnt) == 0)
+ goto skip;
FILEDESC_FOREACH_FP(fdp, i, fp) {
if (refcount_load(&fdp->fd_refcnt) == 0)
break;
@@ -4645,6 +4653,7 @@
if (error)
break;
}
+skip:
FILEDESC_SUNLOCK(fdp);
fddrop(fdp);
pddrop(pdp);

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