can: hi311x: hi3110_can_ist(): fix potential use-after-free

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[ Upstream commit 9ad86d377e ]

The commit a22bd630cf ("can: hi311x: do not report txerr and rxerr
during bus-off") removed the reporting of rxerr and txerr even in case
of correct operation (i. e. not bus-off).

The error count information added to the CAN frame after netif_rx() is
a potential use after free, since there is no guarantee that the skb
is in the same state. It might be freed or reused.

Fix the issue by postponing the netif_rx() call in case of txerr and
rxerr reporting.

Fixes: a22bd630cf ("can: hi311x: do not report txerr and rxerr during bus-off")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://patch.msgid.link/20241122221650.633981-5-dario.binacchi@amarulasolutions.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Dario Binacchi 2024-11-22 23:15:45 +01:00 • committed by Greg Kroah-Hartman

parent 8ac49d8fc9

commit 1128022009

1 changed files with 2 additions and 1 deletions

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drivers/net/can/spi/hi311x.c

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