RT-AC3200 - Kernel Panics

[Jared Shields]

Hello all,

First time posting an issue here, I apologize if I’m missing any information or steps.

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Router: ASUS RT-AC3200
ROM: FreshTomato Firmware 2019.2 K26ARM USB AIO-64K

Problem: Unexplained, random, kernel panics

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I’ve been experiencing occasional kernel panics on my router, for apparently no reason that I can discern.

I don’t think this is something unique to Fresh Tomato, because I’ve been experiencing them since Shibby 140 on the router, but with the move to Fresh Tomato they’ve greatly decreased in frequency.

I can’t find a pattern to the panics, but it doesn’t appear any type of traffic or activity triggers them.

I’ve got a few lines of a dump which gets output to the syslog, but I’ve not connected a console to debug, since they’re occurring about once a month with Fresh Tomato (with Shibby it was 3-4 panics per week)

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Below is a snippet of the syslog collected by my local Splunk instance from the router.

The date is off because this is the last instance of the error I’ve captured, but recently it happened this morning but didn’t get sent to syslog.

Jul 17 13:15:00 router Jul 17 13:15:00 kernel: Kernel panic - not syncing: Attempted to kill init!
host = router source = udp:1514 sourcetype = syslog
Jul 17 13:15:00 router Jul 17 13:15:00 kernel: [<c0045000>] (unwind_backtrace+0x0/0xf8) from [<c02f9d80>] (panic+0x7c/0x1a8)
host = router source = udp:1514 sourcetype = syslog
Jul 17 13:15:00 router Jul 17 13:15:00 kernel: [<c02f9d80>] (panic+0x7c/0x1a8) from [<c0067a84>] (do_exit+0x5cc/0x674)
host = router source = udp:1514 sourcetype = syslog
Jul 17 13:15:00 router Jul 17 13:15:00 kernel: [<c0067a84>] (do_exit+0x5cc/0x674) from [<c0067d88>] (do_group_exit+0x3c/0xbc)
host = router source = udp:1514 sourcetype = syslog
Jul 17 13:15:00 router Jul 17 13:15:00 kernel: [<c0067d88>] (do_group_exit+0x3c/0xbc) from [<c00725d0>] (get_signal_to_deliver+0x28c/0x3d4)
host = router source = udp:1514 sourcetype = syslog
Jul 17 13:15:00 router Jul 17 13:15:01 kernel: [<c00725d0>] (get_signal_to_deliver+0x28c/0x3d4) from [<c0041448>] (do_signal+0x54/0x5cc)
host = router source = udp:1514 sourcetype = syslog

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Opening this issue because I’d like to get to the bottom of these kernel panics; I’m willing to perform some testing and help gather more logs/figure out what’s going wrong, but have little idea where to start.

Thank you in advance, please let me know if any more information is needed.