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Sebastian Andrzej Siewior 4d2f6c44fd hsr: Add a rcu-read lock to hsr_forward_skb().

[ Upstream commit 5aa2820177 ]

hsr_forward_skb() a skb and keeps information in an on-stack
hsr_frame_info. hsr_get_node() assigns hsr_frame_info::node_src which is
from a RCU list. This pointer is used later in hsr_forward_do().
I don't see a reason why this pointer can't vanish midway since there is
no guarantee that hsr_forward_skb() is invoked from an RCU read section.

Use rcu_read_lock() to protect hsr_frame_info::node_src from its
assignment until it is no longer used.

Fixes: f266a683a4 ("net/hsr: Better frame dispatch")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2022-12-31 13:32:21 +01:00

hsr_debugfs.c

Revert "net: hsr: use hlist_head instead of list_head for mac addresses"

2022-12-31 13:32:21 +01:00

hsr_device.c

Revert "net: hsr: use hlist_head instead of list_head for mac addresses"

2022-12-31 13:32:21 +01:00

hsr_device.h

net: hsr: add offloading support

2021-02-11 13:24:44 -08:00

hsr_forward.c

hsr: Add a rcu-read lock to hsr_forward_skb().