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linux-next/net/can
Oliver Hartkopp d73ff9b7c4 can: af_can: can_rx_unregister(): remove WARN() statement from list operation sanity check
To detect potential bugs in CAN protocol implementations (double removal of
receiver entries) a WARN() statement has been used if no matching list item was
found for removal.

The fault injection issued by syzkaller was able to create a situation where
the closing of a socket runs simultaneously to the notifier call chain for
removing the CAN network device in use.

This case is very unlikely in real life but it doesn't break anything.
Therefore we just replace the WARN() statement with pr_warn() to preserve the
notification for the CAN protocol development.

Reported-by: syzbot+381d06e0c8eaacb8706f@syzkaller.appspotmail.com
Reported-by: syzbot+d0ddd88c9a7432f041e6@syzkaller.appspotmail.com
Reported-by: syzbot+76d62d3b8162883c7d11@syzkaller.appspotmail.com
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://lore.kernel.org/r/20201126192140.14350-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2020-11-27 10:49:28 +01:00
..
j1939 can: j1939: j1939_sk_bind(): return failure if netdev is down 2020-11-03 22:30:31 +01:00
af_can.c can: af_can: can_rx_unregister(): remove WARN() statement from list operation sanity check 2020-11-27 10:49:28 +01:00
af_can.h can: introduce CAN midlayer private and allocate it automatically 2019-09-04 13:29:14 +02:00
bcm.c can: remove obsolete version strings 2020-10-12 10:06:39 +02:00
gw.c can: remove obsolete version strings 2020-10-12 10:06:39 +02:00
isotp.c can: isotp: padlen(): make const array static, makes object smaller 2020-11-03 22:30:32 +01:00
Kconfig can: isotp: Explain PDU in CAN_ISOTP help text 2020-11-03 22:30:31 +01:00
Makefile can: add ISO 15765-2:2016 transport protocol 2020-10-07 23:18:33 +02:00
proc.c can: proc: can_remove_proc(): silence remove_proc_entry warning 2020-11-03 22:24:19 +01:00
raw.c can: remove obsolete version strings 2020-10-12 10:06:39 +02:00