panic(ffffffff82246142) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8262b940,2,ffff800020a4ee28) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff8262b940,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000a03cc0) at tcp_output+0x14e6 tcp_input(ffff800020a4f3a8,ffff800020a4f3b4,6,2) at tcp_input+0x2353 ip_deliver(ffff800020a4f3a8,ffff800020a4f3b4,6,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668 ip_ours(ffff800020a4f3a8,ffff800020a4f3b4,ffff800020a28750,0) at ip_ours+0x412 ip_input_if(ffff800020a4f3a8,ffff800020a4f3b4,4,0,ffff80000017b2a8) at ip_input_if+0x6ce ipv4_input(ffff80000017b2a8,fffffd8076417600) at ipv4_input+0x48 sys/netinet/ip_input.c:215 ether_input(ffff80000017b2a8,fffffd8076417600,0) at ether_input+0x345 sys/net/if_ethersubr.c:461 if_input_process(ffff80000017b2a8,ffff800020a4f4d8) at if_input_process+0xfb if_ih_input sys/net/if.c:909 [inline] if_input_process(ffff80000017b2a8,ffff800020a4f4d8) at if_input_process+0xfb sys/net/if.c:943 ifiq_process(ffff80000017b6a0) at ifiq_process+0x80 sys/net/ifq.c:646 end trace frame: 0xffff800020a4f590, count: 0 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}> show panic pool_do_get: mbufpl free list modified: page 0xfffffd8076417000; item addr 0xfffffd8076417b00; offset 0x0=0x0 != 0xfabf82e51666dd6d ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82246142) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8262b940,2,ffff800020a4ee28) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff8262b940,2) at pool_get+0xeb sys/kern/subr_pool.c:581 m_gethdr(2,2) at m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 tcp_output(ffff800000a03cc0) at tcp_output+0x14e6 tcp_input(ffff800020a4f3a8,ffff800020a4f3b4,6,2) at tcp_input+0x2353 ip_deliver(ffff800020a4f3a8,ffff800020a4f3b4,6,2) at ip_deliver+0x353 sys/netinet/ip_input.c:668 ip_ours(ffff800020a4f3a8,ffff800020a4f3b4,ffff800020a28750,0) at ip_ours+0x412 ip_input_if(ffff800020a4f3a8,ffff800020a4f3b4,4,0,ffff80000017b2a8) at ip_input_if+0x6ce ipv4_input(ffff80000017b2a8,fffffd8076417600) at ipv4_input+0x48 sys/netinet/ip_input.c:215 ether_input(ffff80000017b2a8,fffffd8076417600,0) at ether_input+0x345 sys/net/if_ethersubr.c:461 if_input_process(ffff80000017b2a8,ffff800020a4f4d8) at if_input_process+0xfb if_ih_input sys/net/if.c:909 [inline] if_input_process(ffff80000017b2a8,ffff800020a4f4d8) at if_input_process+0xfb sys/net/if.c:943 ifiq_process(ffff80000017b6a0) at ifiq_process+0x80 sys/net/ifq.c:646 taskq_thread(ffff80000002b080) at taskq_thread+0x9c sys/kern/kern_task.c:369 end trace frame: 0x0, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800020a4ec70 rbx 0xffff800020a4ed20 rdx 0xffff800020a28750 rcx 0 rax 0 r8 0xffffffff81b395df kprintf+0x16f r9 0x1 r10 0x25 r11 0x2d7bab62ff1a38ae r12 0x3000000008 r13 0xffff800020a4ec80 r14 0x100 r15 0x1 rip 0xffffffff8177a798 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020a4ec60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (softnet) pid=355119 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff800020a289c0,0xffff800020a28280 process=0xffff800020a2af00 user=0xffff800020a4a000, vmspace=0xffffffff826492e0 estcpu=1, cpticks=3, pctcpu=0.64 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35337 177133 14041 0 2 0x480 syz-executor.1 35337 499115 14041 0 3 0x4000080 fsleep syz-executor.1 35337 307660 14041 0 3 0x4000080 ttyin syz-executor.1 71634 326919 0 0 3 0x14200 acct acct 94172 174467 0 0 3 0x14200 bored sosplice 14041 516212 49976 0 2 0x482 syz-executor.1 90534 241212 49976 0 3 0x82 piperd syz-executor.0 49976 91850 86221 0 3 0x82 thrsleep syz-fuzzer 49976 458035 86221 0 2 0x4000482 syz-fuzzer 49976 341437 86221 0 2 0x4000482 syz-fuzzer 49976 57729 86221 0 3 0x4000082 thrsleep syz-fuzzer 49976 27534 86221 0 3 0x4000082 thrsleep syz-fuzzer 49976 332868 86221 0 3 0x4000082 thrsleep syz-fuzzer 49976 276730 86221 0 3 0x4000082 thrsleep syz-fuzzer 49976 364936 86221 0 3 0x4000082 kqread syz-fuzzer 49976 338911 86221 0 3 0x4000082 pipewr syz-fuzzer 49976 84905 86221 0 3 0x4000082 thrsleep syz-fuzzer 86221 468929 1186 0 3 0x10008a pause ksh 1186 499385 40572 0 7 0x12 sshd 30785 191728 1 0 3 0x100083 ttyin getty 40572 140064 1 0 3 0x80 select sshd 10710 347110 24863 74 2 0x100492 pflogd 24863 451771 1 0 3 0x80 netio pflogd 42543 273325 4585 73 3 0x100090 kqread syslogd 4585 148713 1 0 3 0x100082 netio syslogd 75655 261228 1 77 3 0x100090 poll dhclient 47926 191237 1 0 3 0x80 poll dhclient 4504 373573 0 0 2 0x14200 zerothread 19159 31711 0 0 3 0x14200 aiodoned aiodoned 74743 171441 0 0 3 0x14200 syncer update 81060 507481 0 0 3 0x14200 cleaner cleaner 42376 51009 0 0 3 0x14200 reaper reaper 69878 82813 0 0 3 0x14200 pgdaemon pagedaemon 84948 480299 0 0 3 0x14200 bored crynlk 86251 489576 0 0 3 0x14200 bored crypto 83231 444885 0 0 3 0x40014200 acpi0 acpi0 20231 395077 0 0 3 0x40014200 idle1 *72008 355119 0 0 7 0x14200 softnet 17921 169619 0 0 3 0x14200 bored systqmp 54385 494680 0 0 3 0x14200 bored systq 92289 197819 0 0 2 0x40014200 softclock 574 351843 0 0 3 0x40014200 idle0 62570 379906 0 0 3 0x14200 bored smr 1 408429 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex mbufpl r = 0 (0xffffffff8262b950) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 #5 tcp_output+0x14e6 #6 tcp_input+0x2353 #7 ip_deliver+0x353 sys/netinet/ip_input.c:668 #8 ip_ours+0x412 #9 ip_input_if+0x6ce #10 ipv4_input+0x48 sys/netinet/ip_input.c:215 #11 ether_input+0x345 sys/net/if_ethersubr.c:461 #12 if_input_process+0xfb if_ih_input sys/net/if.c:909 [inline] #12 if_input_process+0xfb sys/net/if.c:943 #13 ifiq_process+0x80 sys/net/ifq.c:646 #14 taskq_thread+0x9c sys/kern/kern_task.c:369 #15 proc_trampoline+0x1c Process 72008 (softnet) thread 0xffff800020a28750 (355119) shared rwlock netlock r = 0 (0xffffffff8245ee98) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 if_input_process+0x84 sys/net/if.c:941 #3 ifiq_process+0x80 sys/net/ifq.c:646 #4 taskq_thread+0x9c sys/kern/kern_task.c:369 #5 proc_trampoline+0x1c shared rwlock softnet r = 0 (0xffff80000002b0e0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 taskq_thread+0x8f sys/kern/kern_task.c:368 #2 proc_trampoline+0x1c exclusive mutex mbufpl r = 0 (0xffffffff8262b950) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 m_gethdr+0x4c sys/kern/uipc_mbuf.c:283 #5 tcp_output+0x14e6 #6 tcp_input+0x2353 #7 ip_deliver+0x353 sys/netinet/ip_input.c:668 #8 ip_ours+0x412 #9 ip_input_if+0x6ce #10 ipv4_input+0x48 sys/netinet/ip_input.c:215 #11 ether_input+0x345 sys/net/if_ethersubr.c:461 #12 if_input_process+0xfb if_ih_input sys/net/if.c:909 [inline] #12 if_input_process+0xfb sys/net/if.c:943 #13 ifiq_process+0x80 sys/net/ifq.c:646 #14 taskq_thread+0x9c sys/kern/kern_task.c:369 #15 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9507 6419K 6743K 78643K 10877 0 pcb 13 8K 8K 78643K 65 0 rtable 111 3K 3K 78643K 266 0 ifaddr 69 14K 14K 78643K 90 0 counters 43 33K 34K 78643K 49 0 ioctlops 0 0K 4K 78643K 1474 0 iov 0 0K 14K 78643K 27 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1332 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 18 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 186 0 sigio 0 0K 0K 78643K 6 0 proc 61 63K 83K 78643K 459 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 38 0 in_multi 56 3K 3K 78643K 85 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 1K 78643K 226 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 116 38K 38K 78643K 1575 0 UVM aobj 26 4K 4K 78643K 31 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 43 0 NDP 10 0K 0K 78643K 17 0 temp 118 3017K 3090K 78643K 5982 0 kqueue 3 4K 8K 78643K 14 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 8 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 45 0 43 1 0 1 1 0 8 0 rtentry 112 50 0 3 2 0 2 2 0 8 0 unpcb 120 465 0 455 2 1 1 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 131 0 127 2 0 2 2 0 8 1 inpcb 280 406 0 394 3 0 3 3 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 4 0 0 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 pffrag 232 4 0 4 1 0 1 1 0 482 1 pffrnode 88 4 0 4 1 0 1 1 0 8 1 pffrent 40 10 0 10 1 0 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 39 0 2 1 0 1 1 0 8 0 pfstkey 112 39 0 2 2 0 2 2 0 8 0 pfstate 328 39 0 2 4 0 4 4 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 220 0 0 14 0 14 14 0 8 0 art_table 32 221 0 0 2 0 2 2 0 8 0 art_node 16 49 0 7 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 22 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 29 0 5 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1688 0 280 46 0 46 46 0 8 0 ffsino 272 1688 0 280 95 0 95 95 0 8 0 nchpl 144 2137 0 521 61 0 61 61 0 8 0 uvmvnodes 72 1795 0 0 33 0 33 33 0 8 0 vnodes 208 1795 0 0 95 0 95 95 0 8 0 namei 1024 6055 0 6055 1 0 1 1 0 8 1 percpumem 16 35 0 3 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 scxspl 192 6376 0 6376 8 5 3 7 0 8 3 plimitpl 152 28 0 19 1 0 1 1 0 8 0 sigapl 432 385 0 370 3 1 2 3 0 8 0 futexpl 56 3643 0 3642 1 0 1 1 0 8 0 knotepl 112 68 0 49 1 0 1 1 0 8 0 kqueuepl 104 44 0 42 1 0 1 1 0 8 0 pipelkpl 48 124 0 114 1 0 1 1 0 8 0 pipepl 120 248 0 229 1 0 1 1 0 8 0 fdescpl 496 386 0 370 3 0 3 3 0 8 0 filepl 152 2916 0 2812 7 1 6 6 0 8 1 lockfpl 104 41 0 40 1 0 1 1 0 8 0 lockfspl 48 17 0 16 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 33 0 22 1 0 1 1 0 8 0 ucredpl 96 335 0 325 1 0 1 1 0 8 0 zombiepl 144 370 0 370 1 0 1 1 0 8 1 processpl 960 403 0 370 5 0 5 5 0 8 0 procpl 624 801 0 757 4 0 4 4 0 8 0 sosppl 128 12 0 12 1 1 0 1 0 8 0 sockpl 400 926 0 906 7 2 5 7 0 8 2 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 157 0 0 19 0 19 19 0 8 0 mtagpl 80 15 0 0 1 0 1 1 0 8 0 mbufpl 256 175 0 0 11 0 11 11 0 8 1 mbufpl: pool(0xffffffff8262b940:mbufpl): free list modified: page 0xfffffd8076417000; item ordinal 0; addr 0xfffffd8076417b00 (p 0xfffffd807f7c4000); offset 0x0=0x0 pool(mbufpl): free list modified: page 0xfffffd8076417000; item ordinal 0; addr 0xfffffd8076417b00 (p 0xfffffd807f7c4000); offset 0x0=0x0 mbufpl: pool(0xffffffff8262b940:mbufpl): page inconsistency: page 0xfffffd8076417000; item ordinal 1; addr 0x804d0efae8314a1a bufpl 280 4489 0 194 307 0 307 307 0 8 0 anonpl 16 49872 0 33177 69 1 68 68 0 125 0 amapchunkpl 152 2011 0 1873 8 1 7 8 0 158 0 amappl16 192 1626 0 709 47 0 47 47 0 8 0 amappl15 184 58 0 55 1 0 1 1 0 8 0 amappl14 176 27 0 26 1 0 1 1 0 8 0 amappl13 168 93 0 90 1 0 1 1 0 8 0 amappl12 160 7 0 6 1 0 1 1 0 8 0 amappl11 152 56 0 40 1 0 1 1 0 8 0 amappl10 144 11 0 7 1 0 1 1 0 8 0 amappl9 136 668 0 664 1 0 1 1 0 8 0 amappl8 128 190 0 164 1 0 1 1 0 8 0 amappl7 120 103 0 91 1 0 1 1 0 8 0 amappl6 112 60 0 52 1 0 1 1 0 8 0 amappl5 104 143 0 128 1 0 1 1 0 8 0 amappl4 96 638 0 607 1 0 1 1 0 8 0 amappl3 88 129 0 120 1 0 1 1 0 8 0 amappl2 80 2264 0 2188 3 1 2 3 0 8 0 amappl1 72 18543 0 18087 25 15 10 20 0 8 0 amappl 80 1048 0 1003 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 30 0 5 1 0 1 1 0 8 0 uaddrrnd 24 387 0 370 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 387 0 370 1 0 1 1 0 8 0 vmmpekpl 168 7069 0 7033 2 0 2 2 0 8 0 vmmpepl 168 55093 0 52993 126 12 114 121 0 357 17 vmsppl 368 386 0 370 2 0 2 2 0 8 0 pdppl 4096 781 0 741 6 0 6 6 0 8 0 pvpl 32 168920 0 149024 167 0 167 167 0 265 5 pmappl 232 386 0 370 2 0 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 173 0 5 5 0 5 5 0 8 0