Date: Wed, 05 Aug 2026 15:16:18 +0000 From: Mark Johnston <markj@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 0af1065b3a57 - stable/14 - ktls: Propagate EPG_FLAG_ANON to mapped mbufs Message-ID: <6a7353c2.455f3.773d46b7@gitrepo.freebsd.org>
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The branch stable/14 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=0af1065b3a5721a9e5433622dcc8a7adb96ad2ed commit 0af1065b3a5721a9e5433622dcc8a7adb96ad2ed Author: Mark Johnston <markj@FreeBSD.org> AuthorDate: 2026-07-29 18:45:36 +0000 Commit: Mark Johnston <markj@FreeBSD.org> CommitDate: 2026-08-05 15:15:14 +0000 ktls: Propagate EPG_FLAG_ANON to mapped mbufs Otherwise ktls_mbuf_crypto_state() will reject mbufs created by _mb_unmapped_to_ext(), which arises when transmitting packets through an interface that doesn't support unmapped mbufs, and the loopback interface in particular. PR: 296498 Fixes: 3444414cb463 ("ktls: Don't attempt to modify non-anonymous mbufs on the receive path") Reviewed by: gallatin, jhb MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D57557 (cherry picked from commit 815976ee14121bafe8a8ab002459d32f8928f2de) --- sys/kern/kern_mbuf.c | 3 +++ sys/kern/uipc_ktls.c | 3 ++- sys/sys/mbuf.h | 1 + 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/sys/kern/kern_mbuf.c b/sys/kern/kern_mbuf.c index 69d82086c7a5..16e1d8af56ae 100644 --- a/sys/kern/kern_mbuf.c +++ b/sys/kern/kern_mbuf.c @@ -1021,6 +1021,9 @@ _mb_unmapped_to_ext(struct mbuf *m, struct mbuf **mres) ref_inc++; m_extadd(m_new, (char *)sf_buf_kva(sf), PAGE_SIZE, mb_unmapped_free_mext, sf, mref, M_RDONLY, EXT_SFBUF); + m_new->m_ext.ext_flags |= + (m->m_epg_flags & EPG_FLAG_ANON) != 0 ? + EXT_FLAG_SFBUF_ANON : 0; m_new->m_data += segoff; m_new->m_len = seglen; diff --git a/sys/kern/uipc_ktls.c b/sys/kern/uipc_ktls.c index dc370d033a7a..81914324fe5b 100644 --- a/sys/kern/uipc_ktls.c +++ b/sys/kern/uipc_ktls.c @@ -2360,7 +2360,8 @@ ktls_mbuf_crypto_state(struct mbuf *mb, int offset, int len) (mb->m_epg_flags & EPG_FLAG_ANON) == 0) return (KTLS_MBUF_CRYPTO_ST_SHAREDMBUF); if ((mb->m_flags & M_EXT) != 0 && - mb->m_ext.ext_type == EXT_SFBUF) + mb->m_ext.ext_type == EXT_SFBUF && + (mb->m_ext.ext_flags & EXT_FLAG_SFBUF_ANON) == 0) return (KTLS_MBUF_CRYPTO_ST_SHAREDMBUF); m_flags_ored |= mb->m_flags; diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h index 2ba2836f84ac..23b6c0de3d1a 100644 --- a/sys/sys/mbuf.h +++ b/sys/sys/mbuf.h @@ -618,6 +618,7 @@ m_epg_pagelen(const struct mbuf *m, int pidx, int pgoff) */ #define EXT_FLAG_EMBREF 0x000001 /* embedded ext_count */ #define EXT_FLAG_EXTREF 0x000002 /* external ext_cnt, notyet */ +#define EXT_FLAG_SFBUF_ANON 0x000004 /* sendfile buffer is mutable */ #define EXT_FLAG_NOFREE 0x000010 /* don't free mbuf to pool, notyet */home | help
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