kernel:T p aag fStopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 91917 55705 0 0x10 0 1 syz-executor 196476 91980 0 0 0x4000000 0K syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7e4a8ca3fa60, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}>