uvm_fault(0xfffffd806bc09660, 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(0xfffffd806bc09660, 0xa, 0, 1) -> e vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 end trace frame: 0xffff80001d73f8e0, 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(ffff80001d73f990,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: 0xc00263ccc0, count: -5 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d73f880 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0 r11 0x5858bbe40510bb09 r12 0xffff80000002ea00 r13 0xc r14 0xfffffd8061cfae00 r15 0 rip 0xffffffff821f3f21 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d73f7f0 ss 0 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-fuzzer) pid=359512 stat=onproc flags process=2 proc=4000000 pri=51, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff80001d71c9d0,0xffff80001d71cec0 process=0xffff80001d707978 user=0xffff80001d73a000, vmspace=0xfffffd806bc09660 estcpu=1, cpticks=5, pctcpu=0.6 user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 8121 433180 18707 0 3 0x80 nanosleep syz-executor.0 8121 98667 18707 0 3 0x4000080 pipewr syz-executor.0 8121 479322 18707 0 3 0x4000080 fsleep syz-executor.0 28452 489439 0 0 3 0x14200 bored sosplice 38032 126893 0 0 3 0x14200 acct acct 80382 57151 51924 0 2 0x2 syz-executor.1 18707 157870 51924 0 3 0x82 nanosleep syz-executor.0 51924 501658 46486 0 3 0x82 thrsleep syz-fuzzer 51924 420372 46486 0 3 0x4000082 nanosleep syz-fuzzer *51924 359512 46486 0 7 0x4000002 syz-fuzzer 51924 314304 46486 0 3 0x4000082 thrsleep syz-fuzzer 51924 465603 46486 0 3 0x4000082 thrsleep syz-fuzzer 51924 489698 46486 0 3 0x4000082 thrsleep syz-fuzzer 51924 520834 46486 0 3 0x4000082 thrsleep syz-fuzzer 51924 414194 46486 0 3 0x4000082 thrsleep syz-fuzzer 46486 334207 52507 0 3 0x10008a pause ksh 52507 509432 9171 0 2 0x12 sshd 86403 194283 1 0 3 0x100083 ttyin getty 9171 468998 1 0 3 0x80 select sshd 59196 523088 84732 73 3 0x100090 kqread syslogd 84732 510835 1 0 3 0x100082 netio syslogd 28556 225797 1 77 3 0x100090 poll dhclient 93471 465299 1 0 3 0x80 poll dhclient 16079 476412 0 0 3 0x14200 bored smr 49896 77674 0 0 2 0x14200 zerothread 71675 228762 0 0 3 0x14200 aiodoned aiodoned 22855 448436 0 0 3 0x14200 syncer update 31966 405731 0 0 3 0x14200 cleaner cleaner 66634 113479 0 0 3 0x14200 reaper reaper 24043 13416 0 0 3 0x14200 pgdaemon pagedaemon 45867 253402 0 0 3 0x14200 bored crynlk 89565 476928 0 0 3 0x14200 bored crypto 63052 68989 0 0 3 0x40014200 acpi0 acpi0 34994 212156 0 0 3 0x14200 bored softnet 69132 277711 0 0 3 0x14200 bored systqmp 40106 260694 0 0 3 0x14200 bored systq 8240 468274 0 0 3 0x40014200 bored softclock 94652 154599 0 0 3 0x40014200 idle0 1 225469 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 9502 6470K 6725K 78643K 11183 0 pcb 13 8K 8K 78643K 73 0 rtable 110 4K 5K 78643K 283 0 ifaddr 162 37K 37K 78643K 196 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 23 0 ioctlops 0 0K 4K 78643K 56 0 iov 0 0K 16K 78643K 24 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1969 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 1K 1K 78643K 27 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 1410 0 sigio 0 0K 0K 78643K 4 0 proc 48 38K 63K 78643K 386 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 104 0 in_multi 325 11K 11K 78643K 438 0 ether_multi 1 0K 0K 78643K 28 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 207 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 145 56K 72K 78643K 4183 0 UVM aobj 7 2K 2K 78643K 17 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 491 0 NDP 11 0K 0K 78643K 20 0 temp 127 3860K 3925K 78643K 5675 0 kqueue 3 4K 8K 78643K 10 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 6 0 0 1 0 1 1 0 8 0 rtpcb 80 29 0 27 1 0 1 1 0 8 0 rtentry 112 60 0 17 2 0 2 2 0 8 0 unpcb 120 697 0 689 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpqe 32 655 0 655 3 2 1 2 0 8 1 tcpcb 544 522 0 517 2 1 1 2 0 8 0 inpcb 296 1251 0 1243 7 5 2 2 0 8 1 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 48 17 0 12 1 0 1 1 0 8 0 ppxss 1136 1 0 1 1 1 0 1 0 8 0 pfrktable 1344 11 0 9 3 2 1 1 0 8 0 pfrule 1360 6 0 4 3 2 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 233 0 40 13 0 13 13 0 8 0 art_table 32 235 0 40 2 0 2 2 0 8 0 art_node 16 59 0 19 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 0 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 25 0 15 1 0 1 1 0 8 0 shmpl 112 14 0 10 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3574 0 2178 88 0 88 88 0 8 0 ffsino 240 3574 0 2178 83 0 83 83 0 8 0 nchpl 144 6424 0 4820 60 0 60 60 0 8 0 uvmvnodes 72 3958 0 0 72 0 72 72 0 8 0 vnodes 208 3958 0 0 209 0 209 209 0 8 0 namei 1024 17576 0 17576 2 1 1 1 0 8 1 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 528 4 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 4 0 2 2 1 1 1 0 8 0 scsiplug 64 1 0 1 1 0 1 1 0 8 1 scxspl 192 14381 0 14379 1 0 1 1 0 8 0 plimitpl 152 25 0 18 1 0 1 1 0 8 0 sigapl 424 1598 0 1568 4 0 4 4 0 8 0 futexpl 56 28843 0 28842 1 0 1 1 0 8 0 knotepl 112 71 0 52 1 0 1 1 0 8 0 kqueuepl 144 40 0 38 1 0 1 1 0 8 0 pipepl 272 341 0 330 3 2 1 2 0 8 0 fdescpl 432 1582 0 1568 2 0 2 2 0 8 0 filepl 120 10205 0 10106 4 0 4 4 0 8 0 lockfpl 104 71 0 70 1 0 1 1 0 8 0 lockfspl 48 28 0 27 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 1334 0 1327 1 0 1 1 0 8 0 zombiepl 144 1568 0 1568 2 1 1 1 0 8 1 processpl 928 1598 0 1568 4 0 4 4 0 8 0 procpl 624 3474 0 3435 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 400 1977 0 1959 7 4 3 4 0 8 1 mcl64k 65536 21 0 21 5 5 0 1 0 8 0 mcl16k 16384 3 0 3 2 2 0 1 0 8 0 mcl12k 12288 11 0 10 8 7 1 1 0 8 0 mcl9k 9216 3 0 3 3 3 0 1 0 8 0 mcl8k 8192 7 0 7 6 5 1 1 0 8 1 mcl4k 4096 39 0 39 9 8 1 1 0 8 1 mcl2k2 2112 3 0 3 3 3 0 1 0 8 0 mcl2k 2048 91885 0 91823 39 30 9 32 0 8 0 mtagpl 96 32 0 2 2 1 1 1 0 8 0 mbufpl 256 150530 0 150279 29 11 18 19 0 8 0 bufpl 280 4749 0 125 331 0 331 331 0 8 0 anonpl 16 133613 0 116380 84 13 71 82 0 107 0 amapchunkpl 152 6467 0 6336 21 15 6 19 0 158 0 amappl16 192 6397 0 5442 58 10 48 58 0 8 0 amappl15 184 758 0 755 1 0 1 1 0 8 0 amappl14 176 644 0 638 1 0 1 1 0 8 0 amappl13 168 27 0 24 1 0 1 1 0 8 0 amappl12 160 12 0 9 1 0 1 1 0 8 0 amappl11 152 665 0 655 1 0 1 1 0 8 0 amappl10 144 15 0 11 1 0 1 1 0 8 0 amappl9 136 372 0 371 1 0 1 1 0 8 0 amappl8 128 358 0 307 2 0 2 2 0 8 0 amappl7 120 106 0 95 1 0 1 1 0 8 0 amappl6 112 647 0 641 1 0 1 1 0 8 0 amappl5 104 909 0 898 1 0 1 1 0 8 0 amappl4 96 1044 0 1015 1 0 1 1 0 8 0 amappl3 88 118 0 112 1 0 1 1 0 8 0 amappl2 80 12572 0 12506 2 0 2 2 0 8 0 amappl1 72 45360 0 44939 23 14 9 17 0 8 0 amappl 80 3689 0 3645 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 16 0 10 1 0 1 1 0 8 0 uaddrrnd 24 1586 0 1568 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1586 0 1568 1 0 1 1 0 8 0 vmmpekpl 168 13597 0 13563 2 0 2 2 0 8 0 vmmpepl 168 195869 0 193758 133 35 98 109 0 357 1 vmsppl 272 1585 0 1568 3 1 2 2 0 8 0 pdppl 4096 3178 0 3140 7 1 6 6 0 8 0 pvpl 32 389973 0 370220 198 32 166 194 0 265 6 pmappl 200 1585 0 1568 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 312 0 75 8 0 8 8 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(ffff80001d73f990,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: 0xc00263ccc0, 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(ffff80001d73f990,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: 0xc00263ccc0, count: -5