panic: pool_do_put: mcl2k: double pool_put: 0xffffff0006d3a000 Stopped at db_enter+0xa: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND *149383 49461 0 0 0x4000000 0 syz-executor1 db_enter() at db_enter+0xa panic() at panic+0x147 pool_do_put(ffffff0006d3a000,ffffffff81e95980) at pool_do_put+0x2e2 pool_put(0,ffffff006ee64700) at pool_put+0x37 m_extfree(4827c29eab66cbba) at m_extfree+0xb1 m_free(ffffff006ee64700) at m_free+0xee m_freem(16) at m_freem+0x2d soreceive(0,ffffff006f2dda80,0,9a,ffff80002116cd38,ffff80002116cc40) at soreceive+0x1131 recvit(ffff8000210ac020,ffff80002116cdd0,0,ffff80002116cde8,185fe227708) at recvit+0x28c sys_recvfrom(ffff80002116ce70,ffff8000210ac020,ffff8000210a5660) at sys_recvfrom+0xbc syscall(0) at syscall+0x3e4 Xsyscall(6,0,ffffffffffffffbd,0,6,18326129010) at Xsyscall+0x128 end of kernel end trace frame: 0x185fe227790, count: 3 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs.