panic: pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd807d74e800+16 0x0!=0xe31396ccad43f2e3 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 95744 85150 0 0x12 0 0 sshd 329065 10195 0 0x14000 0x200 1 softnet db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240e744) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828d47c8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069151300,13b4,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069151300,13b4,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb4d0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaecc88,9,fffffd806d5f1400,0,0,ffff8000fffffb38) at tcp_usrreq+0xa55 sosend(fffffd806eaecc88,0,ffff800020e24188,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffffb38,4,ffff800020e24188,0,ffff800020e24270) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e24220,ffff800020e24270) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e242f0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e242f0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe9290, 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. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic pool_cache_item_magic_check: mbufpl cpu free list modified: item addr 0xfffffd807d74e800+16 0x0!=0xe31396ccad43f2e3 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240e744) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828d47c8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069151300,13b4,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069151300,13b4,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb4d0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaecc88,9,fffffd806d5f1400,0,0,ffff8000fffffb38) at tcp_usrreq+0xa55 sosend(fffffd806eaecc88,0,ffff800020e24188,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffffb38,4,ffff800020e24188,0,ffff800020e24270) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e24220,ffff800020e24270) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e242f0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e242f0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe9290, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020e23b20 rbx 0xffff800020e23bd0 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffff800020e23ae0 r9 0xffffffff8167b47f kprintf+0x16f r10 0x1 r11 0xfce130c9f30c17ac r12 0x3000000008 r13 0xffff800020e23b30 r14 0x100 r15 0x1 rip 0xffffffff8215e708 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020e23b10 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (sshd) pid=95744 stat=onproc flags process=12 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe9f0,0xffff8000ffffec78 process=0xffff8000ffffcbd0 user=0xffff800020e1f000, vmspace=0xfffffd806e90a738 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 37619 431732 7992 0 2 0 syz-executor.1 94439 57253 0 0 3 0x14200 acct acct 30511 221241 1 0 3 0x100083 ttyin getty 43820 282505 81582 0 3 0x2 biowait syz-executor.0 60546 306893 0 0 3 0x14200 bored sosplice 44911 486959 0 0 3 0x14280 nfsidl nfsio 59376 434852 0 0 3 0x14280 nfsidl nfsio 11162 295051 0 0 3 0x14280 nfsidl nfsio 97845 367013 0 0 3 0x14280 nfsidl nfsio 29472 30361 0 0 3 0x14280 nfsidl nfsio 29288 41094 0 0 3 0x14280 nfsidl nfsio 17612 218744 0 0 3 0x14280 nfsidl nfsio 80082 238303 0 0 3 0x14280 nfsidl nfsio 51110 305980 0 0 3 0x14280 nfsidl nfsio 80900 124099 0 0 3 0x14280 nfsidl nfsio 4201 346090 0 0 3 0x14280 nfsidl nfsio 59461 351733 0 0 3 0x14280 nfsidl nfsio 82614 483062 0 0 3 0x14280 nfsidl nfsio 40251 500418 0 0 3 0x14280 nfsidl nfsio 80411 129667 0 0 3 0x14280 nfsidl nfsio 86273 208202 0 0 3 0x14280 nfsidl nfsio 2594 511731 0 0 3 0x14280 nfsidl nfsio 52772 89547 0 0 3 0x14280 nfsidl nfsio 61505 275421 0 0 3 0x14280 nfsidl nfsio 3637 521658 0 0 3 0x14280 nfsidl nfsio 7992 399279 81582 0 3 0x82 nanosleep syz-executor.1 81582 508137 97226 0 3 0x82 thrsleep syz-fuzzer 81582 456239 97226 0 3 0x4000082 nanosleep syz-fuzzer 81582 312089 97226 0 3 0x4000082 thrsleep syz-fuzzer 81582 475136 97226 0 3 0x4000082 thrsleep syz-fuzzer 81582 507136 97226 0 3 0x4000082 nanosleep syz-fuzzer 81582 168099 97226 0 3 0x4000082 kqread syz-fuzzer 81582 305711 97226 0 3 0x4000082 thrsleep syz-fuzzer 81582 141909 97226 0 3 0x4000082 thrsleep syz-fuzzer 97226 1941 85150 0 3 0x10008a pause ksh *85150 95744 97647 0 7 0x12 sshd 97647 488150 1 0 3 0x80 select sshd 60451 433100 77739 74 3 0x100092 bpf pflogd 77739 507683 1 0 3 0x80 netio pflogd 48681 268011 50087 73 3 0x100090 kqread syslogd 50087 161588 1 0 3 0x100082 netio syslogd 28935 37100 1 77 3 0x100090 poll dhclient 23355 216447 1 0 3 0x80 poll dhclient 65567 207513 0 0 3 0x14200 bored smr 62400 363104 0 0 2 0x14200 zerothread 59023 241625 0 0 3 0x14200 aiodoned aiodoned 59725 120589 0 0 3 0x14200 syncer update 18609 519996 0 0 3 0x14200 cleaner cleaner 31175 66822 0 0 3 0x14200 reaper reaper 28817 118151 0 0 3 0x14200 pgdaemon pagedaemon 97381 425453 0 0 3 0x14200 bored crynlk 27955 207340 0 0 3 0x14200 bored crypto 17024 254518 0 0 3 0x40014200 acpi0 acpi0 14218 128181 0 0 3 0x40014200 idle1 10195 329065 0 0 7 0x14200 softnet 26340 509631 0 0 3 0x14200 bored systqmp 42597 289702 0 0 3 0x14200 bored systq 4443 162616 0 0 3 0x40014200 bored softclock 25256 473559 0 0 3 0x40014200 idle0 1 138322 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &ifq->ifq_mtx r = 0 (0xffff80000017c560) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 ifq_deq_begin+0x31 sys/net/ifq.c:412 #4 vio_start+0xf6 sys/dev/pv/if_vio.c:735 #5 if_qstart_compat+0x36 sys/net/if.c:677 #6 ifq_serialize+0x173 sys/net/ifq.c:113 #7 taskq_thread+0xfa sys/kern/kern_task.c:449 #8 proc_trampoline+0x1c Process 43820 (syz-executor.0) thread 0xffff800023f8c030 (282505) exclusive rrwlock inode r = 0 (0xfffffd806f6c4c50) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vget+0x1c8 sys/kern/vfs_subr.c:671 #6 ufs_ihashget+0x141 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x74 sys/ufs/ffs/ffs_vfsops.c:1329 #8 ufs_lookup+0x14b7 sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5b sys/kern/vfs_vops.c:90 #10 vfs_lookup+0x7a6 sys/kern/vfs_lookup.c:568 #11 namei+0x63c sys/kern/vfs_lookup.c:249 #12 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #13 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e6986f8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 dounlinkat+0x99 sys/kern/vfs_syscalls.c:1853 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 Process 85150 (sshd) thread 0xffff8000fffffb38 (95744) exclusive rwlock netlock r = 0 (0xffffffff82780fa0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x559 sys/kern/uipc_socket.c:543 #3 dofilewritev+0x1b6 sys/kern/sys_generic.c:365 #4 sys_write+0x83 sys/kern/sys_generic.c:285 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #6 Xsyscall+0x128 Process 10195 (softnet) thread 0xffff800020d88278 (329065) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8293cf68) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 if_qstart_compat+0x1a sys/net/if.c:675 #2 ifq_serialize+0x173 sys/net/ifq.c:113 #3 taskq_thread+0xfa sys/kern/kern_task.c:449 #4 proc_trampoline+0x1c shared rwlock softnet r = 0 (0xffff80000002c070) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 taskq_thread+0xdf sys/kern/kern_task.c:445 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9534 6428K 6880K 78643K 11535 0 pcb 13 8K 8K 78643K 102 0 rtable 108 15K 15K 78643K 517 0 ifaddr 96 19K 19K 78643K 195 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 69 0 ioctlops 0 0K 4K 78643K 1619 0 iov 0 0K 18K 78643K 92 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1678 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 23 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 965 0 sigio 0 0K 0K 78643K 2 0 proc 62 63K 95K 78643K 591 0 subproc 32 2K 2K 78643K 70 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 81 0 in_multi 74 3K 3K 78643K 196 0 ether_multi 1 0K 0K 78643K 14 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 73 334K 334K 78643K 73 0 exec 0 0K 1K 78643K 332 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 189 45K 54K 78643K 4427 0 UVM aobj 14 4K 4K 78643K 29 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 100 0 NDP 14 0K 0K 78643K 48 0 temp 143 3878K 3943K 78643K 10177 0 kqueue 3 4K 9K 78643K 24 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 12 0 6 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 88 67 0 65 1 0 1 1 0 8 0 rtentry 112 90 0 55 2 0 2 2 0 8 0 unpcb 120 772 0 762 1 0 1 1 0 8 0 syncache 272 8 0 8 3 3 0 1 0 8 0 tcpqe 32 1074 0 1074 3 3 0 2 0 8 0 tcpcb 592 263 0 259 3 1 2 2 0 8 1 inpcb 296 837 0 828 9 7 2 2 0 8 1 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 26 0 20 1 0 1 1 0 8 0 pkpcb 40 24 0 24 6 6 0 1 0 8 0 ppxss 1136 4 0 4 2 2 0 1 0 8 0 pffrag 232 4 0 3 2 1 1 1 0 482 0 pffrnode 88 4 0 3 2 1 1 1 0 8 0 pffrent 40 52 0 51 2 1 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 36 0 30 6 5 1 1 0 8 0 pfstitem 24 46 0 44 1 0 1 1 0 8 0 pfstkey 112 46 0 44 1 0 1 1 0 8 0 pfstate 328 46 0 44 2 1 1 2 0 8 0 pfrule 1360 40 0 34 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 351 0 201 15 4 11 14 0 8 0 art_table 32 352 0 201 2 0 2 2 0 8 0 art_node 16 89 0 60 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 17 3 2 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 26 0 15 3 2 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2932 0 1530 89 0 89 89 0 8 1 ffsino 272 2932 0 1530 95 1 94 94 0 8 0 nchpl 144 4573 0 2980 60 0 60 60 0 8 0 uvmvnodes 72 3239 0 0 59 0 59 59 0 8 0 vnodes 208 3239 0 0 171 0 171 171 0 8 0 namei 1024 14607 0 14607 6 5 1 1 0 8 1 percpumem 16 45 0 13 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 5 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 14 0 10 6 5 1 1 0 8 0 scxspl 200 13362 0 13361 11 10 1 7 0 8 0 plimitpl 152 72 0 64 1 0 1 1 0 8 0 sigapl 424 1197 0 1144 7 0 7 7 0 8 1 futexpl 56 13335 0 13335 5 4 1 1 0 8 1 knotepl 112 109 0 89 1 0 1 1 0 8 0 kqueuepl 152 107 0 105 1 0 1 1 0 8 0 pipepl 304 220 0 209 13 11 2 2 0 8 1 fdescpl 496 1160 0 1144 3 0 3 3 0 8 0 filepl 152 8186 0 8084 9 4 5 7 0 8 0 lockfpl 104 155 0 154 1 0 1 1 0 8 0 lockfspl 48 64 0 63 1 0 1 1 0 8 0 sessionpl 120 21 0 10 1 0 1 1 0 8 0 pgrppl 48 29 0 18 1 0 1 1 0 8 0 ucredpl 96 2286 0 2277 1 0 1 1 0 8 0 zombiepl 144 1144 0 1144 3 2 1 1 0 8 1 processpl 1008 1197 0 1144 8 1 7 7 0 8 0 procpl 632 3478 0 3418 8 1 7 7 0 8 1 sosppl 144 7 0 7 3 2 1 1 0 8 1 sockpl 400 1704 0 1683 16 11 5 6 0 8 2 mcl64k 65536 258 0 0 33 10 23 33 0 8 1 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 14 0 0 2 0 2 2 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 16 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 269 0 0 33 1 32 33 0 8 0 mtagpl 96 43 0 0 2 0 2 2 0 8 0 mbufpl 256 458 0 0 24 0 24 24 0 8 0 bufpl 280 5053 0 126 352 0 352 352 0 8 0 anonpl 16 158124 0 140137 118 36 82 92 0 124 6 amapchunkpl 152 8589 0 8308 47 30 17 25 0 158 4 amappl16 192 5516 0 4629 71 25 46 57 0 8 1 amappl15 184 554 0 551 1 0 1 1 0 8 0 amappl14 176 8 0 3 1 0 1 1 0 8 0 amappl13 168 46 0 42 1 0 1 1 0 8 0 amappl12 160 116 0 112 1 0 1 1 0 8 0 amappl11 152 70 0 55 1 0 1 1 0 8 0 amappl10 144 571 0 566 1 0 1 1 0 8 0 amappl9 136 366 0 365 1 0 1 1 0 8 0 amappl8 128 454 0 385 3 0 3 3 0 8 0 amappl7 120 582 0 567 1 0 1 1 0 8 0 amappl6 112 36 0 29 1 0 1 1 0 8 0 amappl5 104 1140 0 1124 1 0 1 1 0 8 0 amappl4 96 534 0 506 1 0 1 1 0 8 0 amappl3 88 157 0 149 1 0 1 1 0 8 0 amappl2 80 8291 0 8229 2 0 2 2 0 8 0 amappl1 72 45688 0 45264 23 13 10 18 0 8 0 amappl 80 3786 0 3706 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 28 0 15 1 0 1 1 0 8 0 uaddrrnd 24 1165 0 1147 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1165 0 1147 1 0 1 1 0 8 0 vmmpekpl 168 13464 0 13426 3 0 3 3 0 8 0 vmmpepl 168 159184 0 157081 201 98 103 131 0 357 4 vmsppl 368 1164 0 1147 2 0 2 2 0 8 0 pdppl 4096 2337 0 2296 7 1 6 6 0 8 0 pvpl 32 434358 0 413128 287 93 194 216 0 265 15 pmappl 232 1164 0 1147 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 335 0 39 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8240e744) at panic+0x164 sys/kern/subr_prf.c:218 pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 pool_cache_item_magic_check sys/kern/subr_pool.c:1781 [inline] pool_cache_get(ffffffff828d47c8) at pool_cache_get+0x323 sys/kern/subr_pool.c:1884 pool_get(ffffffff828d47c8,2) at pool_get+0x91 sys/kern/subr_pool.c:572 m_copym(fffffd8069151300,13b4,580,2) at m_copym+0x174 m_get sys/kern/uipc_mbuf.c:250 [inline] m_copym(fffffd8069151300,13b4,580,2) at m_copym+0x174 sys/kern/uipc_mbuf.c:667 tcp_output(ffff800000adb4d0) at tcp_output+0x15ba sys/netinet/tcp_output.c:673 tcp_usrreq(fffffd806eaecc88,9,fffffd806d5f1400,0,0,ffff8000fffffb38) at tcp_usrreq+0xa55 sosend(fffffd806eaecc88,0,ffff800020e24188,0,0,80) at sosend+0x671 sys/kern/uipc_socket.c:555 dofilewritev(ffff8000fffffb38,4,ffff800020e24188,0,ffff800020e24270) at dofilewritev+0x1b6 sys/kern/sys_generic.c:365 sys_write(ffff8000fffffb38,ffff800020e24220,ffff800020e24270) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff800020e242f0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020e242f0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe9290, count: -12 ddb{0}> machine ddbcpu 1