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diff --git a/sys/kern/kern_mbuf.c b/sys/kern/kern_mbuf.c
--- a/sys/kern/kern_mbuf.c
+++ b/sys/kern/kern_mbuf.c
@@ -936,8 +936,8 @@
mb_free_extpg(old_m);
}
-static struct mbuf *
-_mb_unmapped_to_ext(struct mbuf *m)
+static int
+_mb_unmapped_to_ext(struct mbuf *m, struct mbuf **mres)
{
struct mbuf *m_new, *top, *prev, *mref;
struct sf_buf *sf;
@@ -947,9 +947,15 @@
u_int ref_inc = 0;
M_ASSERTEXTPG(m);
+
+ if (m->m_epg_tls != NULL) {
+ /* can't convert TLS mbuf */
+ m_freem(m);
+ *mres = NULL;
+ return (EINVAL);
+ }
+
len = m->m_len;
- KASSERT(m->m_epg_tls == NULL, ("%s: can't convert TLS mbuf %p",
- __func__, m));
/* See if this is the mbuf that holds the embedded refcount. */
if (m->m_ext.ext_flags & EXT_FLAG_EMBREF) {
@@ -1048,7 +1054,8 @@
atomic_add_int(refcnt, ref_inc);
}
m_free(m);
- return (top);
+ *mres = top;
+ return (0);
fail:
if (ref_inc != 0) {
@@ -1065,13 +1072,15 @@
}
m_free(m);
m_freem(top);
- return (NULL);
+ *mres = NULL;
+ return (ENOMEM);
}
-struct mbuf *
-mb_unmapped_to_ext(struct mbuf *top)
+int
+mb_unmapped_to_ext(struct mbuf *top, struct mbuf **mres)
{
- struct mbuf *m, *next, *prev = NULL;
+ struct mbuf *m, *m1, *next, *prev = NULL;
+ int error;
prev = NULL;
for (m = top; m != NULL; m = next) {
@@ -1087,12 +1096,15 @@
*/
prev->m_next = NULL;
}
- m = _mb_unmapped_to_ext(m);
- if (m == NULL) {
- m_freem(top);
+ error = _mb_unmapped_to_ext(m, &m1);
+ if (error != 0) {
+ if (top != m)
+ m_free(top);
m_freem(next);
- return (NULL);
+ *mres = NULL;
+ return (error);
}
+ m = m1;
if (prev == NULL) {
top = m;
} else {
@@ -1111,7 +1123,8 @@
prev = m;
}
}
- return (top);
+ *mres = top;
+ return (0);
}
/*
diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h
--- a/sys/sys/mbuf.h
+++ b/sys/sys/mbuf.h
@@ -813,7 +813,7 @@
struct mbuf *mb_mapped_to_unmapped(struct mbuf *, int, int, int,
struct mbuf **);
int mb_unmapped_compress(struct mbuf *m);
-struct mbuf *mb_unmapped_to_ext(struct mbuf *m);
+int mb_unmapped_to_ext(struct mbuf *m, struct mbuf **mres);
void mb_free_notready(struct mbuf *m, int count);
void m_adj(struct mbuf *, int);
void m_adj_decap(struct mbuf *, int);

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