uvm_fault(fffffd807f005cf0,d6ad1be4000,1,2) at uvm_fault+0x1373 sys/uvm/uvm_fault.c:939 pageflttrap(ffff800020b74fc0,1) at pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199 usertrap(ffff800020b74fc0) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:369 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7fffff5510, count: 5 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 0xfffffd8062241c00+16 0x0!=0x96ad4d92bfa0b85c ddb{0}> trace vio_rxeof(ffff800000171000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 vio_rx_intr(ffff800000171050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1054 intr_handler(ffff800020b74a80,ffff80000024bc00) at intr_handler+0x8f sys/arch/amd64/amd64/intr.c:529 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f Xspllower() at Xspllower+0x19 pmap_enter(fffffd807f004ae0,d6ad1be4000,65e9f000,3,22) at pmap_enter+0x91a pmap_unmap_ptes sys/arch/amd64/amd64/pmap.c:431 [inline] pmap_enter(fffffd807f004ae0,d6ad1be4000,65e9f000,3,22) at pmap_enter+0x91a sys/arch/amd64/amd64/pmap.c:2769 uvm_fault(fffffd807f005cf0,d6ad1be4000,1,2) at uvm_fault+0x1373 sys/uvm/uvm_fault.c:939 pageflttrap(ffff800020b74fc0,1) at pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199 usertrap(ffff800020b74fc0) at usertrap+0x21a sys/arch/amd64/amd64/trap.c:369 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7fffff5510, count: -10 ddb{0}> show registers rdi 0xc rsi 0xc rbp 0xffff800020b749c0 rbx 0xffff800000171000 rdx 0 rcx 0xffffffff82486ff0 cpu_info_full_primary+0x1ff0 rax 0xffffffff82486ff0 cpu_info_full_primary+0x1ff0 r8 0x2 r9 0x5 r10 0x826a5963522b2207 r11 0xb43f44861e752892 r12 0xffff80000001ce00 r13 0xc r14 0xfffffd8062249000 r15 0 rip 0xffffffff82052a81 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800020b74930 ss 0 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb{0}> show proc PROC (syz-executor.0) pid=43385 stat=onproc flags process=2 proc=0 pri=75, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff800020a98ee8,0xffff800020a982a0 process=0xffff800020a9bc50 user=0xffff800020b70000, vmspace=0xfffffd807f005cf0 estcpu=36, cpticks=0, pctcpu=0.6 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29985 415565 31251 0 2 0 syz-executor.1 29985 237993 31251 0 3 0x4000080 fsleep syz-executor.1 34928 507971 0 0 3 0x14200 bored sosplice 31251 7462 93996 0 3 0x82 nanosleep syz-executor.1 *40135 43385 93996 0 7 0x2 syz-executor.0 93996 214447 99700 0 3 0x82 thrsleep syz-fuzzer 93996 55254 99700 0 3 0x4000082 nanosleep syz-fuzzer 93996 4585 99700 0 3 0x4000082 thrsleep syz-fuzzer 93996 29739 99700 0 3 0x4000082 thrsleep syz-fuzzer 93996 324353 99700 0 3 0x4000082 thrsleep syz-fuzzer 93996 315441 99700 0 3 0x4000082 thrsleep syz-fuzzer 93996 220544 99700 0 3 0x4000082 thrsleep syz-fuzzer 93996 375672 99700 0 3 0x4000082 thrsleep syz-fuzzer 93996 49584 99700 0 3 0x4000082 nanosleep syz-fuzzer 93996 444708 99700 0 3 0x4000082 kqread syz-fuzzer 99700 455900 25104 0 3 0x10008a pause ksh 25104 375493 41679 0 3 0x52 netlock sshd 31947 347274 1 0 3 0x100083 ttyin getty 41679 304352 1 0 3 0x80 select sshd 90403 93611 98273 74 3 0x100092 bpf pflogd 98273 490887 1 0 3 0x80 netio pflogd 91783 320748 79822 73 3 0x100090 kqread syslogd 79822 147245 1 0 3 0x100082 netio syslogd 81620 458131 1 77 3 0x100090 poll dhclient 18217 455599 1 0 3 0x80 poll dhclient 46729 349149 0 0 3 0x14200 pgzero zerothread 96137 494339 0 0 3 0x14200 aiodoned aiodoned 28723 107738 0 0 3 0x14200 syncer update 33952 516722 0 0 3 0x14200 cleaner cleaner 16337 324302 0 0 3 0x14200 reaper reaper 68865 490149 0 0 3 0x14200 pgdaemon pagedaemon 28280 118333 0 0 3 0x14200 bored crynlk 30351 241033 0 0 3 0x14200 bored crypto 70616 397254 0 0 3 0x14200 bored viomb 40610 183923 0 0 3 0x40014200 acpi0 acpi0 25995 296296 0 0 3 0x40014200 idle1 61854 104284 0 0 7 0x14200 softnet 65575 274501 0 0 3 0x14200 bored systqmp 21573 269420 0 0 3 0x14200 bored systq 58499 114060 0 0 3 0x40014200 bored softclock 54419 66728 0 0 3 0x40014200 idle0 87166 359695 0 0 3 0x14200 bored smr 1 477480 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 40135 (syz-executor.0) thread 0xffff800020a98c70 (43385) shared rwlock vmmaplk r = 0 (0xfffffd807f005d08) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1448 #2 uvm_fault+0x7f sys/uvm/uvm_fault.c:524 #3 pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199 #4 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369 #5 recall_trap+0x8 exclusive kernel_lock &kernel_lock r = 2 (0xffffffff8265cfc8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 pageflttrap+0x6f sys/arch/amd64/amd64/trap.c:162 #2 usertrap+0x21a sys/arch/amd64/amd64/trap.c:369 #3 recall_trap+0x8 Process 61854 (softnet) thread 0xffff800020a20768 (104284) shared rwlock netlock r = 0 (0xffffffff82478d78) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 if_input_process+0x84 sys/net/if.c:942 #3 ifiq_process+0x80 sys/net/ifq.c:607 #4 taskq_thread+0x9c sys/kern/kern_task.c:368 #5 proc_trampoline+0x1c shared rwlock softnet r = 0 (0xffff8000000230e0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 taskq_thread+0x8f sys/kern/kern_task.c:367 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9556 6812K 7648K 78643K 11623 0 pcb 13 8K 8K 78643K 63 0 rtable 111 4K 5K 78643K 293 0 ifaddr 76 15K 15K 78643K 123 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1475 0 iov 0 0K 18K 78643K 55 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 1505 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 70 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1810 197K 290K 78643K 12817 0 file desc 5 13K 25K 78643K 208 0 sigio 0 0K 0K 78643K 1 0 proc 61 63K 95K 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 40 0 in_multi 56 3K 3K 78643K 77 0 ether_multi 1 0K 0K 78643K 6 0 mrt 0 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 60 265K 265K 78643K 60 0 exec 0 0K 1K 78643K 233 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 118 22K 32K 78643K 1640 0 UVM aobj 16 2K 2K 78643K 16 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 36 0 NDP 12 0K 0K 78643K 24 0 temp 135 3031K 3096K 78643K 5711 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 6 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 29 0 27 1 0 1 1 0 8 0 rtentry 112 47 0 3 2 0 2 2 0 8 0 unpcb 120 129 0 118 1 0 1 1 0 8 0 syncache 264 7 0 7 2 2 0 1 0 8 0 tcpqe 32 26 0 26 2 2 0 1 0 8 0 tcpcb 544 97 0 93 1 0 1 1 0 8 0 inpcb 280 357 0 350 2 0 2 2 0 8 1 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 6 0 6 1 0 1 1 0 8 1 pffrag 232 3 0 3 1 1 0 1 0 482 0 pffrnode 88 3 0 3 1 1 0 1 0 8 0 pffrent 40 135 0 135 1 1 0 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 pfstitem 24 28 0 2 1 0 1 1 0 8 0 pfstkey 112 28 0 2 1 0 1 1 0 8 0 pfstate 328 28 0 2 3 0 3 3 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 256 212 0 0 14 0 14 14 0 8 0 art_table 32 213 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 6 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 66 0 56 1 0 1 1 0 8 0 shmpl 112 14 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1742 0 338 46 0 46 46 0 8 0 ffsino 272 1742 0 338 95 0 95 95 0 8 0 nchpl 144 2283 0 662 61 0 61 61 0 8 0 uvmvnodes 72 1999 0 0 37 0 37 37 0 8 0 vnodes 208 1999 0 0 106 0 106 106 0 8 0 namei 1024 6786 0 6786 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 6379 0 6379 8 7 1 7 0 8 1 plimitpl 152 37 0 29 1 0 1 1 0 8 0 sigapl 432 407 0 392 3 1 2 3 0 8 0 futexpl 56 5006 0 5005 1 0 1 1 0 8 0 knotepl 112 74 0 55 1 0 1 1 0 8 0 kqueuepl 104 31 0 29 1 0 1 1 0 8 0 pipepl 160 232 0 213 2 0 2 2 0 8 1 fdescpl 488 408 0 392 3 0 3 3 0 8 0 filepl 152 3134 0 3033 8 2 6 7 0 8 2 lockfpl 104 131 0 130 1 0 1 1 0 8 0 lockfspl 48 47 0 46 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 36 0 25 1 0 1 1 0 8 0 ucredpl 96 406 0 397 1 0 1 1 0 8 0 zombiepl 144 392 0 392 2 1 1 1 0 8 1 processpl 904 425 0 392 4 0 4 4 0 8 0 procpl 632 846 0 803 5 0 5 5 0 8 0 sosppl 128 4 0 4 1 1 0 1 0 8 0 sockpl 384 515 0 495 6 2 4 5 0 8 1 mcl64k 65536 8 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 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 168 0 0 20 0 20 20 0 8 0 mtagpl 80 20 0 0 1 0 1 1 0 8 0 mbufpl 256 293 0 0 18 0 18 18 0 8 0 bufpl 280 6771 0 1343 388 0 388 388 0 8 0 anonpl 16 59030 0 39576 89 2 87 87 0 125 8 amapchunkpl 152 2567 0 2407 14 2 12 14 0 158 4 amappl16 192 1969 0 921 55 0 55 55 0 8 2 amappl15 184 67 0 62 1 0 1 1 0 8 0 amappl14 176 33 0 30 1 0 1 1 0 8 0 amappl13 168 2 0 1 2 1 1 1 0 8 0 amappl12 160 2 0 1 2 1 1 1 0 8 0 amappl11 152 150 0 133 1 0 1 1 0 8 0 amappl10 144 95 0 88 1 0 1 1 0 8 0 amappl9 136 602 0 599 1 0 1 1 0 8 0 amappl8 128 135 0 108 1 0 1 1 0 8 0 amappl7 120 183 0 172 1 0 1 1 0 8 0 amappl6 112 153 0 145 1 0 1 1 0 8 0 amappl5 104 132 0 116 1 0 1 1 0 8 0 amappl4 96 663 0 632 1 0 1 1 0 8 0 amappl3 88 116 0 109 1 0 1 1 0 8 0 amappl2 80 2365 0 2289 3 1 2 3 0 8 0 amappl1 72 18897 0 18441 26 16 10 21 0 8 0 amappl 80 1108 0 1061 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 408 0 392 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 408 0 392 1 0 1 1 0 8 0 vmmpekpl 168 7178 0 7150 2 0 2 2 0 8 0 vmmpepl 168 57647 0 55409 146 17 129 136 0 357 28 vmsppl 368 407 0 392 2 0 2 2 0 8 0 pdppl 4096 823 0 784 7 1 6 6 0 8 0 pvpl 32 185542 0 162916 206 1 205 205 0 265 21 pmappl 232 407 0 392 2 1 1 2 0 8 0 extentpl 40 50 0 32 1 0 1 1 0 8 0 phpool 112 177 0 5 5 0 5 5 0 8 0