linux_dsm_epyc7002/net/tls
Dave Watson c212d2c7fc net/tls: Don't recursively call push_record during tls_write_space callbacks
It is reported that in some cases, write_space may be called in
do_tcp_sendpages, such that we recursively invoke do_tcp_sendpages again:

[  660.468802]  ? do_tcp_sendpages+0x8d/0x580
[  660.468826]  ? tls_push_sg+0x74/0x130 [tls]
[  660.468852]  ? tls_push_record+0x24a/0x390 [tls]
[  660.468880]  ? tls_write_space+0x6a/0x80 [tls]
...

tls_push_sg already does a loop over all sending sg's, so ignore
any tls_write_space notifications until we are done sending.
We then have to call the previous write_space to wake up
poll() waiters after we are done with the send loop.

Reported-by: Andre Tomt <andre@tomt.net>
Signed-off-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-01 18:57:52 -04:00
..
Kconfig tls: RX path for ktls 2018-03-23 12:25:54 -04:00
Makefile tls: kernel TLS support 2017-06-15 12:12:40 -04:00
tls_main.c net/tls: Don't recursively call push_record during tls_write_space callbacks 2018-05-01 18:57:52 -04:00
tls_sw.c net/tls: Remove VLA usage 2018-04-12 21:46:10 -04:00