uvm_fault(0xfffffd806bc09dd0, 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(0xfffffd806bc09dd0, 0xa, 0, 1) -> e vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 end trace frame: 0xffff80001d769af0, 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(ffff80001d769ba0,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: 0xc000940b10, count: -5 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d769a90 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0 r11 0xcdd1a50caf0ff66c r12 0xffff80000002ea00 r13 0xc r14 0xfffffd806953c800 r15 0 rip 0xffffffff8144b091 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d769a00 ss 0 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-fuzzer) pid=3759 stat=onproc flags process=2 proc=4000000 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80001d71d120,0xffff80001d6a9018 process=0xffff80001d706018 user=0xffff80001d764000, vmspace=0xfffffd806bc09dd0 estcpu=31, cpticks=1, pctcpu=4.67 user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 88692 134861 23691 0 2 0 syz-executor.1 88692 267880 23691 0 3 0x4000080 fsleep syz-executor.1 88692 505696 23691 0 3 0x4000080 fsleep syz-executor.1 98982 7436 0 0 3 0x14200 bored sosplice 23691 170789 8388 0 3 0x82 nanosleep syz-executor.1 55516 145508 8388 0 3 0x82 piperd syz-executor.0 8388 258326 50566 0 3 0x82 thrsleep syz-fuzzer 8388 42527 50566 0 3 0x4000082 nanosleep syz-fuzzer 8388 494363 50566 0 2 0x4000002 syz-fuzzer 8388 29003 50566 0 3 0x4000082 thrsleep syz-fuzzer 8388 223880 50566 0 3 0x4000082 thrsleep syz-fuzzer * 8388 3759 50566 0 7 0x4000002 syz-fuzzer 8388 414934 50566 0 3 0x4000082 thrsleep syz-fuzzer 8388 303505 50566 0 3 0x4000082 thrsleep syz-fuzzer 50566 274857 9725 0 3 0x10008a pause ksh 9725 24679 10912 0 3 0x92 select sshd 84000 238136 1 0 3 0x100083 ttyin getty 10912 137719 1 0 3 0x80 select sshd 96535 31799 67266 73 3 0x100090 kqread syslogd 67266 228893 1 0 3 0x100082 netio syslogd 53569 303093 1 77 3 0x100090 poll dhclient 34619 470796 1 0 3 0x80 poll dhclient 65865 468142 0 0 3 0x14200 bored smr 92741 160922 0 0 2 0x14200 zerothread 11546 359225 0 0 3 0x14200 aiodoned aiodoned 55004 248329 0 0 3 0x14200 syncer update 38619 269505 0 0 3 0x14200 cleaner cleaner 93807 111741 0 0 3 0x14200 reaper reaper 34612 136446 0 0 3 0x14200 pgdaemon pagedaemon 8525 273080 0 0 3 0x14200 bored crynlk 76403 257278 0 0 3 0x14200 bored crypto 25619 421805 0 0 3 0x40014200 acpi0 acpi0 78242 265516 0 0 3 0x14200 bored softnet 1814 121918 0 0 3 0x14200 bored systqmp 78790 3991 0 0 3 0x14200 bored systq 47675 306758 0 0 3 0x40014200 bored softclock 1651 127303 0 0 3 0x40014200 idle0 1 270468 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 9493 6340K 8383K 78643K 11131 0 pcb 13 8K 8K 78643K 111 0 rtable 127 7K 10K 78643K 516 0 ifaddr 75 15K 15K 78643K 197 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 34 0 ioctlops 0 0K 4K 78643K 120 0 iov 0 0K 12K 78643K 56 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 1422 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 102 0 dirhash 9 1K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 519 0 sigio 0 0K 0K 78643K 12 0 proc 49 38K 63K 78643K 430 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 36 0 in_multi 48 2K 2K 78643K 158 0 ether_multi 1 0K 0K 78643K 20 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 250 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 147 105K 121K 78643K 2059 0 UVM aobj 35 7K 7K 78643K 37 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 92 0 NDP 11 0K 0K 78643K 40 0 temp 106 3858K 3922K 78643K 5082 0 kqueue 3 4K 9K 78643K 32 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 9 0 2 1 0 1 1 0 8 0 rtpcb 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 81 0 36 2 0 2 2 0 8 0 unpcb 120 277 0 269 1 0 1 1 0 8 0 syncache 264 14 0 14 6 6 0 1 0 8 0 tcpqe 32 36 0 36 2 2 0 1 0 8 0 tcpcb 544 222 0 218 1 0 1 1 0 8 0 inpcb 296 1312 0 1304 4 2 2 2 0 8 1 nd6 48 23 0 18 1 0 1 1 0 8 0 ppxss 1136 5 0 5 1 1 0 1 0 8 0 pfosfp 40 2 0 0 1 0 1 1 0 8 0 pfosfpen 112 4 0 0 1 0 1 1 0 8 0 pfrktable 1344 69 0 62 4 3 1 2 0 8 0 pftag 88 14 0 12 2 1 1 1 0 8 0 pfrule 1360 27 0 17 2 1 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 316 0 103 17 3 14 14 0 8 0 art_table 32 317 0 103 2 0 2 2 0 8 0 art_node 16 80 0 38 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 9 2 1 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 98 0 88 1 0 1 1 0 8 0 shmpl 112 34 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 10 3 1 2 3 0 8 0 dino2pl 256 2039 0 639 88 0 88 88 0 8 0 ffsino 240 2039 0 639 83 0 83 83 0 8 0 nchpl 144 2911 0 1321 60 0 60 60 0 8 0 uvmvnodes 72 2222 0 0 41 0 41 41 0 8 0 vnodes 208 2222 0 0 117 0 117 117 0 8 0 namei 1024 7668 0 7668 2 1 1 1 0 8 1 vcpupl 1984 9 0 0 2 0 2 2 0 8 0 vmpool 528 12 0 3 1 0 1 1 0 8 0 pfiaddrpl 120 22 0 16 2 1 1 1 0 8 0 scxspl 192 8896 0 8896 6 5 1 1 0 8 1 plimitpl 152 38 0 31 1 0 1 1 0 8 0 sigapl 424 704 0 675 4 0 4 4 0 8 0 futexpl 56 10303 0 10301 2 1 1 1 0 8 0 knotepl 112 109 0 90 1 0 1 1 0 8 0 kqueuepl 144 64 0 62 1 0 1 1 0 8 0 pipepl 272 128 0 118 1 0 1 1 0 8 0 fdescpl 432 688 0 674 2 0 2 2 0 8 0 filepl 120 4204 0 4108 5 1 4 4 0 8 1 lockfpl 104 100 0 99 1 0 1 1 0 8 0 lockfspl 48 35 0 34 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 18 0 8 1 0 1 1 0 8 0 ucredpl 96 336 0 329 1 0 1 1 0 8 0 zombiepl 144 675 0 675 2 1 1 1 0 8 1 processpl 928 704 0 675 4 0 4 4 0 8 0 procpl 624 1299 0 1261 6 3 3 4 0 8 0 sosppl 128 11 0 11 3 3 0 1 0 8 0 sockpl 400 1642 0 1624 6 3 3 4 0 8 1 mcl64k 65536 18 0 18 7 6 1 1 0 8 1 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl12k 12288 9 0 9 6 6 0 1 0 8 0 mcl9k 9216 8 0 8 5 4 1 1 0 8 1 mcl8k 8192 7 0 7 6 6 0 1 0 8 0 mcl4k 4096 40 0 40 8 8 0 1 0 8 0 mcl2k2 2112 2 0 2 2 2 0 1 0 8 0 mcl2k 2048 92305 0 92265 14 8 6 13 0 8 0 mtagpl 96 49 0 10 2 1 1 1 0 8 0 mbufpl 256 149231 0 148994 24 6 18 18 0 8 0 bufpl 280 4276 0 129 297 0 297 297 0 8 0 anonpl 16 99198 0 81201 97 22 75 90 0 107 0 amapchunkpl 152 3489 0 3347 33 27 6 20 0 158 0 amappl16 192 3517 0 2466 80 27 53 64 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 468 0 460 1 0 1 1 0 8 0 amappl13 168 63 0 60 1 0 1 1 0 8 0 amappl12 160 38 0 35 2 1 1 1 0 8 0 amappl11 152 488 0 475 1 0 1 1 0 8 0 amappl10 144 15 0 9 1 0 1 1 0 8 0 amappl9 136 372 0 370 1 0 1 1 0 8 0 amappl8 128 359 0 313 2 0 2 2 0 8 0 amappl7 120 113 0 99 1 0 1 1 0 8 0 amappl6 112 465 0 456 2 1 1 1 0 8 0 amappl5 104 188 0 178 1 0 1 1 0 8 0 amappl4 96 877 0 846 1 0 1 1 0 8 0 amappl3 88 114 0 108 1 0 1 1 0 8 0 amappl2 80 4650 0 4582 2 0 2 2 0 8 0 amappl1 72 25149 0 24718 23 13 10 17 0 8 0 amappl 80 1540 0 1492 3 1 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 36 0 2 1 0 1 1 0 8 0 uaddrrnd 24 700 0 677 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 700 0 677 1 0 1 1 0 8 0 vmmpekpl 168 7974 0 7941 2 0 2 2 0 8 0 vmmpepl 168 91966 0 89746 173 75 98 135 0 357 0 vmsppl 272 699 0 677 3 1 2 2 0 8 0 pdppl 4096 1406 0 1363 7 1 6 6 0 8 0 pvpl 32 261194 0 240554 216 40 176 209 0 265 0 pmappl 200 699 0 677 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 282 0 51 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(ffff80001d769ba0,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: 0xc000940b10, 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(ffff80001d769ba0,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: 0xc000940b10, count: -5