From: Greg Kroah-Hartman Date: Mon, 11 May 2026 06:03:09 +0000 (+0200) Subject: 6.18-stable patches X-Git-Tag: v6.18.29~4 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8e9df8020357afaeb0cce3ed9b361f0bbef0fddd;p=thirdparty%2Fkernel%2Fstable-queue.git 6.18-stable patches added patches: rxrpc-also-unshare-data-response-packets-when-paged-frags-are-present.patch --- diff --git a/queue-6.18/rxrpc-also-unshare-data-response-packets-when-paged-frags-are-present.patch b/queue-6.18/rxrpc-also-unshare-data-response-packets-when-paged-frags-are-present.patch new file mode 100644 index 0000000000..af4c6050f0 --- /dev/null +++ b/queue-6.18/rxrpc-also-unshare-data-response-packets-when-paged-frags-are-present.patch @@ -0,0 +1,61 @@ +From aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 Mon Sep 17 00:00:00 2001 +From: Hyunwoo Kim +Date: Fri, 8 May 2026 17:53:09 +0900 +Subject: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present + +From: Hyunwoo Kim + +commit aa54b1d27fe0c2b78e664a34fd0fdf7cd1960d71 upstream. + +The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE +handler in rxrpc_verify_response() copy the skb to a linear one before +calling into the security ops only when skb_cloned() is true. An skb +that is not cloned but still carries externally-owned paged fragments +(e.g. SKBFL_SHARED_FRAG set by splice() into a UDP socket via +__ip_append_data, or a chained skb_has_frag_list()) falls through to +the in-place decryption path, which binds the frag pages directly into +the AEAD/skcipher SGL via skb_to_sgvec(). + +Extend the gate to also unshare when skb_has_frag_list() or +skb_has_shared_frag() is true. This catches the splice-loopback vector +and other externally-shared frag sources while preserving the +zero-copy fast path for skbs whose frags are kernel-private (e.g. NIC +page_pool RX, GRO). The OOM/trace handling already in place is reused. + +Fixes: d0d5c0cd1e71 ("rxrpc: Use skb_unshare() rather than skb_cow_data()") +Cc: stable@vger.kernel.org +Signed-off-by: Hyunwoo Kim +Reviewed-by: Jiayuan Chen +Acked-by: David Howells +Signed-off-by: Linus Torvalds +Signed-off-by: Greg Kroah-Hartman +--- + net/rxrpc/call_event.c | 4 +++- + net/rxrpc/conn_event.c | 3 ++- + 2 files changed, 5 insertions(+), 2 deletions(-) + +--- a/net/rxrpc/call_event.c ++++ b/net/rxrpc/call_event.c +@@ -334,7 +334,9 @@ bool rxrpc_input_call_event(struct rxrpc + + if (sp->hdr.type == RXRPC_PACKET_TYPE_DATA && + sp->hdr.securityIndex != 0 && +- skb_cloned(skb)) { ++ (skb_cloned(skb) || ++ skb_has_frag_list(skb) || ++ skb_has_shared_frag(skb))) { + /* Unshare the packet so that it can be + * modified by in-place decryption. + */ +--- a/net/rxrpc/conn_event.c ++++ b/net/rxrpc/conn_event.c +@@ -245,7 +245,8 @@ static int rxrpc_verify_response(struct + { + int ret; + +- if (skb_cloned(skb)) { ++ if (skb_cloned(skb) || skb_has_frag_list(skb) || ++ skb_has_shared_frag(skb)) { + /* Copy the packet if shared so that we can do in-place + * decryption. + */ diff --git a/queue-6.18/series b/queue-6.18/series index f0229e7394..c0a6b82378 100644 --- a/queue-6.18/series +++ b/queue-6.18/series @@ -19,3 +19,4 @@ flow_dissector-do-not-dissect-pppoe-pfc-frames.patch mptcp-sync-the-msk-sndbuf-at-accept-time.patch smb-client-smbdirect-fix-mr-registration-for-coalesc.patch net-af_key-zero-aligned-sockaddr-tail-in-pf_key-expo.patch +rxrpc-also-unshare-data-response-packets-when-paged-frags-are-present.patch