diff options
Diffstat (limited to 'sys/kern/uipc_mbuf.c')
| -rw-r--r-- | sys/kern/uipc_mbuf.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c index 98ec889..8e278a4 100644 --- a/sys/kern/uipc_mbuf.c +++ b/sys/kern/uipc_mbuf.c @@ -85,6 +85,14 @@ SYSCTL_INT(_kern_ipc, OID_AUTO, m_defragrandomfailures, CTLFLAG_RW, #endif /* + * Ensure the correct size of various mbuf parameters. It could be off due + * to compiler-induced padding and alignment artifacts. + */ +CTASSERT(sizeof(struct mbuf) == MSIZE); +CTASSERT(MSIZE - offsetof(struct mbuf, m_dat) == MLEN); +CTASSERT(MSIZE - offsetof(struct mbuf, m_pktdat) == MHLEN); + +/* * m_get2() allocates minimum mbuf that would fit "size" argument. */ struct mbuf * |
