ëëpanic: pool_do_get: mbufpl free list modified: page 0xffffff003c3cf000; item addr 0xffffff003c3cfb00; offset 0x0=0x9c87cb9606000100 != 0x9c87cb962807387c Stopped at db_enter+0xa: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND *390638 91303 0 0x12 0 0 sshd db_enter() at db_enter+0xa sys/arch/amd64/amd64/db_interface.c:399 panic() at panic+0x147 sys/kern/subr_prf.c:208 pool_do_get(2,ffffffff81e9adb0,10) at pool_do_get+0x3ae sys/kern/subr_pool.c:752 pool_get(2,2) at pool_get+0x77 sys/kern/subr_pool.c:587 m_gethdr(e4,34) at m_gethdr+0x2f sys/kern/uipc_mbuf.c:270 tcp_output(ffff800014a33c30) at tcp_output+0xfdb sys/netinet/tcp_output.c:654 tcp_usrreq(469c,ffffff0036341188,0,ffffff003c3cf700,0,ed98d03d1af73a18) at tcp_usrreq+0x1c0 sys/netinet/tcp_usrreq.c:331 sosend(ffffff00360a63c8,ffff800014a20578,e4,ffff800014a20620,0,ed98d03d1af73a18) at sosend+0x462 sys/kern/uipc_socket.c:513 dofilewritev(ffff800014a33c30,ffff800014a20620,e4,ffff800014a20630,7f7ffffc2df8) at dofilewritev+0x13e sys/kern/sys_generic.c:364 sys_write(ffff800014a206c0,ffff800014a33c30,ffff800014a15fd8) at sys_write+0x6e sys/kern/sys_generic.c:283 syscall(0) at syscall+0x3e4 Xsyscall(6,4,91e0b2099b3,4,3,920dd597c40) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc2e10, 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.