Marcelo, Thanks for the quick response. The output of uname -a is: Linux li1074-63 4.15.7-x86_64-linode102 #1 SMP Wed Feb 28 16:39:31 UTC 2018 x86_64 GNU/Linux This is a Linode pre-built Debian 9 kernel with CONFIG_DYNAMIC_DEBUG not set. I assume it will be a non-trivial job to build my own kernel to run on Linode - I will look into this. Are there any other options which do not rely on dynamic debug. Regards, Dave. > On 16 Mar 2018, at 15:14, Marcelo Ricardo Leitner <marcelo.leitner@xxxxxxxxx> wrote: > > On Fri, Mar 16, 2018 at 09:33:12AM +0000, David Neil wrote: >> Hi, >> I have been having intermittent problems with SCTP connection failures; I have finally caught one on Wireshark. > > Hi David, > > Two things. 1. Which kernel version are you using? > > 2. Not sure if debian has dynamic_printk enabled, I guess so. > Please run this command to turn on some debug printk's, which should > get activated in the case the asoc is not found. > > As root: > # echo 'func __sctp_rcv_lookup +p' > /sys/kernel/debug/dynamic_debug/control > > And then reproduce the issue again. If you get a printk on dmesg, it's > because the association is not being located when the packet came in, > and thus why the Abort. > > This message is available on kernel >= 4.11. > > M. -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
