Jakub Kicinski be5d5d0637 net: tls: avoid hanging tasks on the tx_lock ...

commit f3221361dc upstream.

syzbot sent a hung task report and Eric explains that adversarial
receiver may keep RWIN at 0 for a long time, so we are not guaranteed
to make forward progress. Thread which took tx_lock and went to sleep
may not release tx_lock for hours. Use interruptible sleep where
possible and reschedule the work if it can't take the lock.

Testing: existing selftest passes

Reported-by: syzbot+9c0268252b8ef967c62e@syzkaller.appspotmail.com
Fixes: 79ffe6087e ("net/tls: add a TX lock")
Link: https://lore.kernel.org/all/000000000000e412e905f5b46201@google.com/
Cc: stable@vger.kernel.org # wait 4 weeks
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20230301002857.2101894-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2023-03-11 13:57:39 +01:00

..

Kconfig

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Makefile

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tls_device_fallback.c

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tls_device.c

net/tls: Remove the context from the list in tls_device_down

2022-08-03 12:03:47 +02:00

tls_main.c

net/tls: Check for errors in tls_device_init

2022-07-21 21:24:31 +02:00

tls_proc.c

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tls_sw.c

net: tls: avoid hanging tasks on the tx_lock

2023-03-11 13:57:39 +01:00

tls_toe.c

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trace.c

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trace.h

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