uvm_fault(0xfffffd806bc09770, 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(0xfffffd806bc09770, 0xa, 0, 1) -> e vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 end trace frame: 0xffff80001d767d60, 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(ffff80001d767e10,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: 0xc0003a8d20, count: -5 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d767d00 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0 r11 0x4520a016cda3b0fc r12 0xffff80000002ea00 r13 0xc r14 0xfffffd806603b200 r15 0 rip 0xffffffff8144b091 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d767c70 ss 0 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-fuzzer) pid=219938 stat=onproc flags process=2 proc=4000000 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d71ceb0,0xffff80001d6aa398 process=0xffff80001d7063b8 user=0xffff80001d762000, vmspace=0xfffffd806bc09770 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 25762 227378 93678 0 3 0x82 nanosleep syz-executor.0 64033 145202 0 0 3 0x14200 bored sosplice 95663 296272 1 0 3 0x100083 ttyin getty 52254 323482 0 0 3 0x14200 acct acct 27663 72927 93678 0 2 0x2 syz-executor.1 93678 367169 25213 0 3 0x82 thrsleep syz-fuzzer 93678 503795 25213 0 2 0x4000002 syz-fuzzer 93678 400206 25213 0 2 0x4000002 syz-fuzzer 93678 375724 25213 0 3 0x4000082 thrsleep syz-fuzzer 93678 172129 25213 0 3 0x4000082 kqread syz-fuzzer *93678 219938 25213 0 7 0x4000002 syz-fuzzer 93678 288879 25213 0 3 0x4000082 thrsleep syz-fuzzer 93678 376750 25213 0 3 0x4000082 thrsleep syz-fuzzer 25213 211025 45078 0 3 0x10008a pause ksh 45078 15617 17643 0 2 0x12 sshd 17643 470718 1 0 3 0x80 select sshd 22107 352160 24920 73 3 0x100090 kqread syslogd 24920 489232 1 0 3 0x100082 netio syslogd 50424 311285 1 77 3 0x100090 poll dhclient 75738 421771 1 0 3 0x80 poll dhclient 76424 92843 0 0 3 0x14200 bored smr 3499 514235 0 0 3 0x14200 pgzero zerothread 71920 98581 0 0 3 0x14200 aiodoned aiodoned 86128 450848 0 0 3 0x14200 syncer update 71470 39618 0 0 3 0x14200 cleaner cleaner 47033 256004 0 0 3 0x14200 reaper reaper 97203 166867 0 0 3 0x14200 pgdaemon pagedaemon 63487 329584 0 0 3 0x14200 bored crynlk 78247 222347 0 0 3 0x14200 bored crypto 1651 185298 0 0 3 0x40014200 acpi0 acpi0 92571 79782 0 0 3 0x14200 bored softnet 62193 393148 0 0 3 0x14200 bored systqmp 3618 122770 0 0 3 0x14200 bored systq 87243 162307 0 0 3 0x40014200 bored softclock 33176 280510 0 0 3 0x40014200 idle0 1 458993 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 9500 6343K 6714K 78643K 11346 0 pcb 13 8K 8K 78643K 129 0 rtable 115 15K 17K 78643K 3457 0 ifaddr 89 18K 18K 78643K 861 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 29 0 ioctlops 0 0K 4K 78643K 1797 0 iov 0 0K 16K 78643K 819 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1569 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 128 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 4 9K 25K 78643K 1716 0 sigio 0 0K 0K 78643K 2 0 proc 50 38K 63K 78643K 530 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 54 0 in_multi 83 4K 4K 78643K 258 0 ether_multi 1 0K 0K 78643K 19 0 mrt 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 256 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 23K 32K 78643K 4700 0 UVM aobj 26 3K 3K 78643K 37 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 86 0 NDP 12 0K 0K 78643K 43 0 temp 131 3862K 3926K 78643K 19641 0 kqueue 3 4K 8K 78643K 25 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 13 0 5 1 0 1 1 0 8 0 rtpcb 80 49 0 47 1 0 1 1 0 8 0 rtentry 112 313 0 274 2 0 2 2 0 8 0 unpcb 120 941 0 932 1 0 1 1 0 8 0 syncache 264 15 0 15 3 3 0 1 0 8 0 tcpqe 32 194 0 194 2 2 0 1 0 8 0 tcpcb 544 237 0 233 1 0 1 1 0 8 0 inpcb 296 1931 0 1924 4 2 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 37 0 31 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 pfosfp 40 3 0 0 1 0 1 1 0 8 0 pfosfpen 112 5 0 0 1 0 1 1 0 8 0 pfrktable 1344 1292 0 1284 1 0 1 1 0 8 0 pftag 88 16 0 14 1 0 1 1 0 8 0 pfrule 1360 417 0 410 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 433 0 223 15 1 14 14 0 8 0 art_table 32 434 0 223 2 0 2 2 0 8 0 art_node 16 116 0 83 1 0 1 1 0 8 0 sysvmsgpl 40 23 0 12 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 124 0 114 1 0 1 1 0 8 0 shmpl 112 34 0 11 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3324 0 1931 88 0 88 88 0 8 0 ffsino 240 3324 0 1931 83 0 83 83 0 8 0 nchpl 144 6037 0 4448 60 0 60 60 0 8 0 uvmvnodes 72 3612 0 0 66 0 66 66 0 8 0 vnodes 208 3612 0 0 191 0 191 191 0 8 0 namei 1024 18294 0 18294 1 0 1 1 0 8 1 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 528 5 0 2 1 0 1 1 0 8 0 pfiaddrpl 120 1186 0 1178 3 2 1 1 0 8 0 scxspl 192 16617 0 16617 1 0 1 1 0 8 1 plimitpl 152 354 0 347 1 0 1 1 0 8 0 sigapl 424 1899 0 1870 4 0 4 4 0 8 0 futexpl 56 33781 0 33781 1 0 1 1 0 8 1 knotepl 112 119 0 100 1 0 1 1 0 8 0 kqueuepl 144 407 0 405 1 0 1 1 0 8 0 pipepl 272 180 0 170 2 1 1 2 0 8 0 fdescpl 432 1883 0 1870 2 0 2 2 0 8 0 filepl 120 11991 0 11896 4 0 4 4 0 8 1 lockfpl 104 199 0 198 1 0 1 1 0 8 0 lockfspl 48 64 0 63 1 0 1 1 0 8 0 sessionpl 112 20 0 10 1 0 1 1 0 8 0 pgrppl 48 22 0 12 1 0 1 1 0 8 0 ucredpl 96 937 0 930 1 0 1 1 0 8 0 zombiepl 144 1870 0 1869 1 0 1 1 0 8 0 processpl 928 1899 0 1869 4 0 4 4 0 8 0 procpl 624 3722 0 3685 4 0 4 4 0 8 0 sosppl 128 11 0 11 1 1 0 1 0 8 0 sockpl 400 2927 0 2909 6 3 3 4 0 8 0 mcl64k 65536 28 0 28 5 5 0 1 0 8 0 mcl16k 16384 4 0 4 2 2 0 1 0 8 0 mcl12k 12288 20 0 20 1 1 0 1 0 8 0 mcl9k 9216 7 0 7 3 3 0 1 0 8 0 mcl8k 8192 380 0 379 4 3 1 1 0 8 0 mcl4k 4096 99 0 99 2 1 1 1 0 8 1 mcl2k2 2112 5 0 5 2 2 0 1 0 8 0 mcl2k 2048 94599 0 94547 24 16 8 19 0 8 0 mtagpl 96 72 0 38 3 2 1 2 0 8 0 mbufpl 256 158085 0 157794 31 6 25 25 0 8 2 bufpl 280 5745 0 393 383 0 383 383 0 8 0 anonpl 16 172716 0 155280 105 29 76 82 0 107 5 amapchunkpl 152 7137 0 7012 18 12 6 11 0 158 0 amappl16 192 7571 0 6599 70 19 51 59 0 8 2 amappl15 184 44 0 43 1 0 1 1 0 8 0 amappl14 176 26 0 22 1 0 1 1 0 8 0 amappl13 168 861 0 856 1 0 1 1 0 8 0 amappl12 160 837 0 830 1 0 1 1 0 8 0 amappl11 152 441 0 432 1 0 1 1 0 8 0 amappl10 144 459 0 455 1 0 1 1 0 8 0 amappl9 136 375 0 374 1 0 1 1 0 8 0 amappl8 128 400 0 349 2 0 2 2 0 8 0 amappl7 120 566 0 554 1 0 1 1 0 8 0 amappl6 112 425 0 412 1 0 1 1 0 8 0 amappl5 104 1809 0 1796 1 0 1 1 0 8 0 amappl4 96 745 0 717 1 0 1 1 0 8 0 amappl3 88 130 0 125 1 0 1 1 0 8 0 amappl2 80 15421 0 15363 2 0 2 2 0 8 0 amappl1 72 49505 0 49112 22 13 9 17 0 8 0 amappl 80 3968 0 3931 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 36 0 11 1 0 1 1 0 8 0 uaddrrnd 24 1888 0 1872 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1888 0 1872 1 0 1 1 0 8 0 vmmpekpl 168 13929 0 13901 2 0 2 2 0 8 0 vmmpepl 168 232589 0 230613 158 46 112 125 0 357 18 vmsppl 272 1887 0 1872 3 1 2 2 0 8 0 pdppl 4096 3782 0 3747 7 2 5 6 0 8 0 pvpl 32 479739 0 459891 232 45 187 193 0 265 24 pmappl 200 1887 0 1872 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 285 0 43 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(ffff80001d767e10,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: 0xc0003a8d20, 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(ffff80001d767e10,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: 0xc0003a8d20, count: -5