usbus_cdc_ecm: failed assertion when host reboots #19663
Description
Description
After a reboot I found my RIOT USB device unresponsive. It turns out it failed an assertion when the host rebooted.
Steps to reproduce the issue
Run the tests/sys/usbus_cdc_ecm application and reboot the host system.
In this case I had the Device USB port of the saml21-xpro connected to a Raspberry Pi and the Debug USB port connected to my laptop.
Expected results
Normal operation continues
Actual results
2023-05-24 18:12:34,954 - INFO # > sys/usb/usbus/usbus.c:285 =>
2023-05-24 18:12:34,956 - INFO # Context before hardfault:
2023-05-24 18:12:34,958 - INFO # r0: 0x0000001d
2023-05-24 18:12:34,959 - INFO # r1: 0x00000020
2023-05-24 18:12:34,961 - INFO # r2: 0x00000019
2023-05-24 18:12:34,963 - INFO # r3: 0x00000173
2023-05-24 18:12:34,964 - INFO # r12: 0x00000019
2023-05-24 18:12:34,966 - INFO # lr: 0x0000e867
2023-05-24 18:12:34,968 - INFO # pc: 0x00000172
2023-05-24 18:12:34,969 - INFO # psr: 0x21000000
2023-05-24 18:12:34,969 - INFO #
2023-05-24 18:12:34,970 - INFO # Misc
2023-05-24 18:12:34,972 - INFO # EXC_RET: 0xfffffffd
2023-05-24 18:12:34,974 - INFO # Active thread: 3 "usbus"
2023-05-24 18:12:34,978 - INFO # Attempting to reconstruct state for debugging...
2023-05-24 18:12:34,979 - INFO # In GDB:
2023-05-24 18:12:34,980 - INFO # set $pc=0x172
2023-05-24 18:12:34,981 - INFO # frame 0
2023-05-24 18:12:34,982 - INFO # bt
2023-05-24 18:12:34,984 - INFO # *** RIOT kernel panic:
2023-05-24 18:12:34,985 - INFO # HARD FAULT HANDLER
2023-05-24 18:12:34,985 - INFO #
2023-05-24 18:12:34,994 - INFO # pid | name | state Q | pri | stack ( used) ( free) | base addr | current
2023-05-24 18:12:35,003 - INFO # - | isr_stack | - - | - | 512 ( 488) ( 24) | 0x20000000 | 0x200006a8
2023-05-24 18:12:35,012 - INFO # 1 | main | bl mutex _ | 7 | 1536 ( 676) ( 860) | 0x2000100c | 0x20001424
2023-05-24 18:12:35,021 - INFO # 2 | ipv6 | bl rx _ | 4 | 1024 ( 544) ( 480) | 0x200016e8 | 0x200019cc
2023-05-24 18:12:35,030 - INFO # 3 | usbus | running Q | 1 | 1024 ( 892) ( 132) | 0x200004dc | 0x2000075c
2023-05-24 18:12:35,039 - INFO # 4 | cdcecm | bl anyfl _ | 2 | 896 ( 300) ( 596) | 0x20002030 | 0x200022f4
2023-05-24 18:12:35,046 - INFO # | SUM | | | 4992 ( 2900) ( 2092)
2023-05-24 18:12:35,046 - INFO #
2023-05-24 18:12:35,047 - INFO # *** halted.
-> https://github.com/RIOT-OS/RIOT/blob/master/sys/usb/usbus/usbus.c#L285
Versions
RIOT master