uvm_fault(0xfffffd806bc09aa0, 0xa, 0, 1) -> e kernel: page fault trap, code=0 Stopped at vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xfffffd806bc09aa0, 0xa, 0, 1) -> e vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 end trace frame: 0xffff80001d7613c0, count: 0 ddb> trace vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 vio_rx_intr(ffff80000017a050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1056 virtio_check_vqs(ffff80000002ea00) at virtio_check_vqs+0x150 sys/dev/pv/virtio.c:228 intr_handler(ffff80001d761470,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f end of kernel end trace frame: 0xc00015f5d0, count: -5 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d761360 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0x286a8ab1028b5b72 r11 0xfd2fac9c31ec5b5e r12 0xffff80000002ea00 r13 0xc r14 0xfffffd805a9ac500 r15 0 rip 0xffffffff81127dc1 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d7612d0 ss 0 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-fuzzer) pid=180200 stat=onproc flags process=2 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff80001d71ceb0,0xffff80001d71d880 process=0xffff80001d706758 user=0xffff80001d75c000, vmspace=0xfffffd806bc09aa0 estcpu=30, cpticks=2, pctcpu=5.75 user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 16549 205571 48063 0 2 0 syz-executor.0 90695 164121 0 0 3 0x14200 bored sosplice 20881 129481 84813 0 3 0x82 piperd syz-executor.1 48063 30810 84813 0 2 0x2 syz-executor.0 84813 252140 27143 0 3 0x82 thrsleep syz-fuzzer 84813 73744 27143 0 3 0x4000082 nanosleep syz-fuzzer 84813 161820 27143 0 3 0x4000082 thrsleep syz-fuzzer 84813 126222 27143 0 3 0x4000082 thrsleep syz-fuzzer *84813 180200 27143 0 7 0x4000002 syz-fuzzer 84813 284557 27143 0 3 0x4000082 thrsleep syz-fuzzer 84813 510270 27143 0 3 0x4000082 thrsleep syz-fuzzer 84813 236646 27143 0 3 0x4000082 thrsleep syz-fuzzer 27143 313216 60166 0 3 0x10008a pause ksh 60166 327546 28758 0 3 0x92 select sshd 14150 385126 1 0 3 0x100083 ttyin getty 28758 95880 1 0 3 0x80 select sshd 37390 101887 35729 73 3 0x100090 kqread syslogd 35729 503988 1 0 3 0x100082 netio syslogd 9053 515646 1 77 3 0x100090 poll dhclient 10389 289442 1 0 3 0x80 poll dhclient 56711 310929 0 0 3 0x14200 bored smr 35274 318290 0 0 2 0x14200 zerothread 26145 378275 0 0 3 0x14200 aiodoned aiodoned 69584 209987 0 0 3 0x14200 syncer update 18028 489564 0 0 3 0x14200 cleaner cleaner 95518 214392 0 0 3 0x14200 reaper reaper 10693 136475 0 0 3 0x14200 pgdaemon pagedaemon 15628 178504 0 0 3 0x14200 bored crynlk 52826 64160 0 0 3 0x14200 bored crypto 9796 37706 0 0 3 0x40014200 acpi0 acpi0 70325 167649 0 0 3 0x14200 bored softnet 81813 171235 0 0 3 0x14200 bored systqmp 71279 447728 0 0 3 0x14200 bored systq 19033 480111 0 0 3 0x40014200 bored softclock 16698 400175 0 0 3 0x40014200 idle0 1 191916 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9484 6337K 6719K 78643K 11043 0 pcb 13 8K 8K 78643K 49 0 rtable 111 5K 9K 78643K 318 0 ifaddr 72 15K 15K 78643K 117 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 25 0 ioctlops 0 0K 4K 78643K 79 0 iov 0 0K 16K 78643K 28 0 mount 1 1K 1K 78643K 1 0 vnodes 1229 77K 77K 78643K 1376 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 34 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 282 0 sigio 0 0K 0K 78643K 4 0 proc 49 38K 63K 78643K 383 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 20 0 in_multi 51 2K 2K 78643K 90 0 ether_multi 1 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 203 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 132 40K 40K 78643K 1487 0 UVM aobj 21 2K 2K 78643K 25 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 24 0 NDP 10 0K 0K 78643K 20 0 temp 95 3857K 3921K 78643K 2759 0 kqueue 3 4K 8K 78643K 23 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 7 0 0 1 0 1 1 0 8 0 rtpcb 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 59 0 18 2 0 2 2 0 8 0 unpcb 120 727 0 719 2 1 1 2 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 108 0 108 1 1 0 1 0 8 0 tcpcb 544 86 0 82 1 0 1 1 0 8 0 inpcb 296 265 0 258 4 3 1 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 48 10 0 8 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pfrke_plain 160 2 0 0 1 0 1 1 0 8 0 pfrktable 1344 30 0 25 2 1 1 2 0 8 0 pftag 88 5 0 4 1 0 1 1 0 8 0 pfstkey 112 4 0 4 1 1 0 1 0 8 0 pfstate 328 2 0 2 1 1 0 1 0 8 0 pfrule 1360 12 0 4 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 247 0 80 13 0 13 13 0 8 0 art_table 32 248 0 80 2 0 2 2 0 8 0 art_node 16 58 0 19 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 26 0 16 1 0 1 1 0 8 0 shmpl 112 22 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1734 0 337 88 0 88 88 0 8 0 ffsino 240 1734 0 337 83 0 83 83 0 8 0 nchpl 144 2354 0 753 60 0 60 60 0 8 0 rtmask 32 4 0 2 1 0 1 1 0 8 0 uvmvnodes 72 1897 0 0 35 0 35 35 0 8 0 vnodes 208 1897 0 0 100 0 100 100 0 8 0 namei 1024 6137 0 6137 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 528 4 0 2 1 0 1 1 0 8 0 pfiaddrpl 120 10 0 6 1 0 1 1 0 8 0 scxspl 192 6444 0 6444 1 0 1 1 0 8 1 plimitpl 152 30 0 23 1 0 1 1 0 8 0 sigapl 424 469 0 440 4 0 4 4 0 8 0 futexpl 56 5404 0 5404 1 0 1 1 0 8 1 knotepl 112 85 0 66 1 0 1 1 0 8 0 kqueuepl 144 50 0 48 1 0 1 1 0 8 0 pipepl 272 102 0 92 1 0 1 1 0 8 0 fdescpl 432 454 0 440 2 0 2 2 0 8 0 filepl 120 3097 0 3002 4 0 4 4 0 8 1 lockfpl 104 96 0 95 1 0 1 1 0 8 0 lockfspl 48 41 0 40 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 41 0 31 1 0 1 1 0 8 0 ucredpl 96 258 0 251 1 0 1 1 0 8 0 zombiepl 144 440 0 440 1 0 1 1 0 8 1 processpl 928 469 0 440 4 0 4 4 0 8 0 procpl 624 782 0 746 4 0 4 4 0 8 0 sockpl 400 1030 0 1013 8 5 3 5 0 8 1 mcl64k 65536 17 0 17 3 2 1 1 0 8 1 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl12k 12288 7 0 6 4 3 1 1 0 8 0 mcl9k 9216 2 0 2 2 2 0 1 0 8 0 mcl8k 8192 10 0 10 3 3 0 1 0 8 0 mcl4k 4096 30 0 30 4 3 1 1 0 8 1 mcl2k 2048 93970 0 93919 18 11 7 14 0 8 0 mtagpl 96 45 0 17 2 1 1 1 0 8 0 mbufpl 256 150110 0 149934 19 3 16 18 0 8 0 bufpl 280 3542 0 126 244 0 244 244 0 8 0 anonpl 16 60854 0 43522 81 10 71 78 0 107 0 amapchunkpl 152 1836 0 1706 8 2 6 8 0 158 0 amappl16 192 2410 0 1431 58 8 50 54 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 23 0 19 1 0 1 1 0 8 0 amappl13 168 35 0 31 1 0 1 1 0 8 0 amappl12 160 9 0 6 1 0 1 1 0 8 0 amappl11 152 44 0 34 1 0 1 1 0 8 0 amappl10 144 96 0 91 1 0 1 1 0 8 0 amappl9 136 537 0 534 1 0 1 1 0 8 0 amappl8 128 328 0 286 2 0 2 2 0 8 0 amappl7 120 189 0 177 1 0 1 1 0 8 0 amappl6 112 24 0 19 1 0 1 1 0 8 0 amappl5 104 399 0 389 1 0 1 1 0 8 0 amappl4 96 422 0 395 1 0 1 1 0 8 0 amappl3 88 111 0 105 1 0 1 1 0 8 0 amappl2 80 2784 0 2728 2 0 2 2 0 8 0 amappl1 72 19359 0 18964 24 15 9 17 0 8 0 amappl 80 1003 0 963 1 0 1 1 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 24 0 4 1 0 1 1 0 8 0 uaddrrnd 24 458 0 442 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 458 0 442 1 0 1 1 0 8 0 vmmpekpl 168 6683 0 6653 2 0 2 2 0 8 0 vmmpepl 168 62009 0 59967 115 23 92 107 0 357 2 vmsppl 272 457 0 442 3 1 2 2 0 8 0 pdppl 4096 922 0 886 6 1 5 6 0 8 0 pvpl 32 184315 0 164083 188 22 166 184 0 265 1 pmappl 200 457 0 442 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 263 0 32 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 vio_rx_intr(ffff80000017a050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1056 virtio_check_vqs(ffff80000002ea00) at virtio_check_vqs+0x150 sys/dev/pv/virtio.c:228 intr_handler(ffff80001d761470,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f end of kernel end trace frame: 0xc00015f5d0, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 vio_rx_intr(ffff80000017a050) at vio_rx_intr+0x4d sys/dev/pv/if_vio.c:1056 virtio_check_vqs(ffff80000002ea00) at virtio_check_vqs+0x150 sys/dev/pv/virtio.c:228 intr_handler(ffff80001d761470,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f end of kernel end trace frame: 0xc00015f5d0, count: -5