This is a note to let you know that I've just added the patch titled
bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx_tx/rx
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bpf-add-sk_is_inet-and-is_icsk-check-in-tls_sw_has_c.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9352348efdaa0519ed50674180f15563f5dfbacc
Author: Zijian Zhang <zijianzhang@xxxxxxxxxxxxx>
Date: Wed Nov 6 00:37:42 2024 +0000
bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx_tx/rx
[ Upstream commit 44d0469f79bd3d0b3433732877358df7dc6b17b1 ]
As the introduction of the support for vsock and unix sockets in sockmap,
tls_sw_has_ctx_tx/rx cannot presume the socket passed in must be IS_ICSK.
vsock and af_unix sockets have vsock_sock and unix_sock instead of
inet_connection_sock. For these sockets, tls_get_ctx may return an invalid
pointer and cause page fault in function tls_sw_ctx_rx.
BUG: unable to handle page fault for address: 0000000000040030
Workqueue: vsock-loopback vsock_loopback_work
RIP: 0010:sk_psock_strp_data_ready+0x23/0x60
Call Trace:
? __die+0x81/0xc3
? no_context+0x194/0x350
? do_page_fault+0x30/0x110
? async_page_fault+0x3e/0x50
? sk_psock_strp_data_ready+0x23/0x60
virtio_transport_recv_pkt+0x750/0x800
? update_load_avg+0x7e/0x620
vsock_loopback_work+0xd0/0x100
process_one_work+0x1a7/0x360
worker_thread+0x30/0x390
? create_worker+0x1a0/0x1a0
kthread+0x112/0x130
? __kthread_cancel_work+0x40/0x40
ret_from_fork+0x1f/0x40
v2:
- Add IS_ICSK check
v3:
- Update the commits in Fixes
Fixes: 634f1a7110b4 ("vsock: support sockmap")
Fixes: 94531cfcbe79 ("af_unix: Add unix_stream_proto for sockmap")
Signed-off-by: Zijian Zhang <zijianzhang@xxxxxxxxxxxxx>
Acked-by: Stanislav Fomichev <sdf@xxxxxxxxxxx>
Acked-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Reviewed-by: Cong Wang <cong.wang@xxxxxxxxxxxxx>
Acked-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20241106003742.399240-1-zijianzhang@xxxxxxxxxxxxx
Signed-off-by: Martin KaFai Lau <martin.lau@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/net/tls.h b/include/net/tls.h
index 2ad28545b15f0..6c642ea180504 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -395,8 +395,12 @@ tls_offload_ctx_tx(const struct tls_context *tls_ctx)
static inline bool tls_sw_has_ctx_tx(const struct sock *sk)
{
- struct tls_context *ctx = tls_get_ctx(sk);
+ struct tls_context *ctx;
+
+ if (!sk_is_inet(sk) || !inet_test_bit(IS_ICSK, sk))
+ return false;
+ ctx = tls_get_ctx(sk);
if (!ctx)
return false;
return !!tls_sw_ctx_tx(ctx);
@@ -404,8 +408,12 @@ static inline bool tls_sw_has_ctx_tx(const struct sock *sk)
static inline bool tls_sw_has_ctx_rx(const struct sock *sk)
{
- struct tls_context *ctx = tls_get_ctx(sk);
+ struct tls_context *ctx;
+
+ if (!sk_is_inet(sk) || !inet_test_bit(IS_ICSK, sk))
+ return false;
+ ctx = tls_get_ctx(sk);
if (!ctx)
return false;
return !!tls_sw_ctx_rx(ctx);
