Fixes for 5.10

Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/queue-5.10/can-isotp-restore-accidentally-removed-msg_peek-feat.patch b/queue-5.10/can-isotp-restore-accidentally-removed-msg_peek-feat.patch
new file mode 100644 (file)
index 0000000..52163e6
--- /dev/null
+++ b/queue-5.10/can-isotp-restore-accidentally-removed-msg_peek-feat.patch
@@ -0,0 +1,48 @@
+From 2750dae9a56fb3450fd29fdaa0e6c09c199595be Mon Sep 17 00:00:00 2001
+From: Sasha Levin <sashal@kernel.org>
+Date: Mon, 28 Mar 2022 13:36:11 +0200
+Subject: can: isotp: restore accidentally removed MSG_PEEK feature
+
+From: Oliver Hartkopp <socketcan@hartkopp.net>
+
+[ Upstream commit e382fea8ae54f5bb62869c6b69b33993d43adeca ]
+
+In commit 42bf50a1795a ("can: isotp: support MSG_TRUNC flag when
+reading from socket") a new check for recvmsg flags has been
+introduced that only checked for the flags that are handled in
+isotp_recvmsg() itself.
+
+This accidentally removed the MSG_PEEK feature flag which is processed
+later in the call chain in __skb_try_recv_from_queue().
+
+Add MSG_PEEK to the set of valid flags to restore the feature.
+
+Fixes: 42bf50a1795a ("can: isotp: support MSG_TRUNC flag when reading from socket")
+Link: https://github.com/linux-can/can-utils/issues/347#issuecomment-1079554254
+Link: https://lore.kernel.org/all/20220328113611.3691-1-socketcan@hartkopp.net
+Reported-by: Derek Will <derekrobertwill@gmail.com>
+Suggested-by: Derek Will <derekrobertwill@gmail.com>
+Tested-by: Derek Will <derekrobertwill@gmail.com>
+Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
+Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
+Signed-off-by: Sasha Levin <sashal@kernel.org>
+---
+ net/can/isotp.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/net/can/isotp.c b/net/can/isotp.c
+index 671c3673b7ea..63e6e8923200 100644
+--- a/net/can/isotp.c
++++ b/net/can/isotp.c
+@@ -1007,7 +1007,7 @@ static int isotp_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
+       int noblock = flags & MSG_DONTWAIT;
+       int ret = 0;
+ 
+-      if (flags & ~(MSG_DONTWAIT | MSG_TRUNC))
++      if (flags & ~(MSG_DONTWAIT | MSG_TRUNC | MSG_PEEK))
+               return -EINVAL;
+ 
+       if (!so->bound)
+-- 
+2.34.1
+

diff --git a/queue-5.10/series b/queue-5.10/series
index 9dd84ce6e4966ebfe78ebad8c9b55f75636e9ecc..708b99b97558715a3c9223dc2b06b49f436463b6 100644 (file)
--- a/queue-5.10/series
+++ b/queue-5.10/series
@@ -568,3 +568,4 @@ io_uring-fix-memory-leak-of-uid-in-files-registration.patch
 riscv-module-remove-noload.patch
 acpi-cppc-avoid-out-of-bounds-access-when-parsing-_cpc-data.patch
 platform-chrome-cros_ec_typec-check-for-ec-device.patch
+can-isotp-restore-accidentally-removed-msg_peek-feat.patch