uvm_fault(0xfffffd806bc09990, 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(0xfffffd806bc09990, 0xa, 0, 1) -> e vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 end trace frame: 0xffff80001d777730, 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(ffff80001d7777e0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f amap_lookups(fffffd80572c75f8,7000,ffff80001d777930,8) at amap_lookups+0x9d uvm_fault(fffffd806bc09990,ab6a9aca000,0,1) at uvm_fault+0x332 sys/uvm/uvm_fault.c:628 pageflttrap(ffff80001d777c40,1) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff80001d777c40) at usertrap+0x1fb sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xab8e2f0db30, count: -10 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d7776d0 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0 r11 0x5d6ed23c05048319 r12 0xffff80000002ea00 r13 0xc r14 0xfffffd80614dc400 r15 0 rip 0xffffffff81b68bf1 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d777640 ss 0 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-executor.0) pid=193325 stat=onproc flags process=0 proc=4000000 pri=53, usrpri=57, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6a9008,0xffffffff82864ba8 process=0xffff80001d6c5970 user=0xffff80001d772000, vmspace=0xfffffd806bc09990 estcpu=7, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 54851 325426 79501 0 2 0 syz-executor.0 *54851 193325 79501 0 7 0x4000000 syz-executor.0 4798 464761 0 0 3 0x14200 bored sosplice 79501 123749 57235 0 3 0x82 nanosleep syz-executor.0 41417 331012 57235 0 2 0x2 syz-executor.1 57235 376055 71129 0 3 0x82 thrsleep syz-fuzzer 57235 152041 71129 0 3 0x4000082 nanosleep syz-fuzzer 57235 250790 71129 0 3 0x4000082 kqread syz-fuzzer 57235 300066 71129 0 3 0x4000082 thrsleep syz-fuzzer 57235 380073 71129 0 3 0x4000082 thrsleep syz-fuzzer 57235 199900 71129 0 3 0x4000082 thrsleep syz-fuzzer 57235 241562 71129 0 3 0x4000082 thrsleep syz-fuzzer 71129 209081 85680 0 3 0x10008a pause ksh 85680 460564 82213 0 3 0x92 select sshd 55364 486689 1 0 3 0x100083 ttyin getty 82213 8398 1 0 3 0x80 select sshd 53515 328553 18023 73 3 0x100090 kqread syslogd 18023 106543 1 0 3 0x100082 netio syslogd 16087 99030 1 77 3 0x100090 poll dhclient 19733 68097 1 0 3 0x80 poll dhclient 6942 296748 0 0 3 0x14200 bored smr 60740 521184 0 0 2 0x14200 zerothread 51645 425156 0 0 3 0x14200 aiodoned aiodoned 33193 351131 0 0 3 0x14200 syncer update 37985 208743 0 0 3 0x14200 cleaner cleaner 10072 191022 0 0 3 0x14200 reaper reaper 43640 499018 0 0 3 0x14200 pgdaemon pagedaemon 34913 144812 0 0 3 0x14200 bored crynlk 34535 487970 0 0 3 0x14200 bored crypto 633 431254 0 0 3 0x40014200 acpi0 acpi0 44036 27428 0 0 3 0x14200 bored softnet 66056 200949 0 0 3 0x14200 bored systqmp 24867 364835 0 0 3 0x14200 bored systq 91647 361444 0 0 3 0x40014200 bored softclock 10685 176968 0 0 3 0x40014200 idle0 1 389361 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 9477 6334K 6854K 78643K 10885 0 pcb 13 8K 8K 78643K 39 0 rtable 116 4K 6K 78643K 254 0 ifaddr 61 13K 13K 78643K 76 0 counters 21 16K 16K 78643K 22 0 ioctlops 0 0K 4K 78643K 33 0 iov 0 0K 12K 78643K 6 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1300 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 30 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 119 0 proc 48 38K 54K 78643K 369 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 10 0 in_multi 37 2K 2K 78643K 53 0 ether_multi 1 0K 0K 78643K 3 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 185 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 121 23K 24K 78643K 1116 0 UVM aobj 5 2K 2K 78643K 7 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 8 0 NDP 9 0K 0K 78643K 18 0 temp 85 3858K 3922K 78643K 2053 0 kqueue 3 4K 4K 78643K 3 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 1 1 0 1 1 0 8 0 rtpcb 80 21 0 19 1 0 1 1 0 8 0 rtentry 112 56 0 10 2 0 2 2 0 8 0 unpcb 120 59 0 51 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 451 0 451 2 2 0 1 0 8 0 tcpcb 544 48 0 43 1 0 1 1 0 8 0 inpcb 296 238 0 230 2 0 2 2 0 8 1 nd6 48 10 0 3 1 0 1 1 0 8 0 pfrktable 1344 10 0 7 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfrule 1360 4 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 197 0 3 13 0 13 13 0 8 0 art_table 32 198 0 3 2 0 2 2 0 8 0 art_node 16 55 0 14 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semapl 112 26 0 16 1 0 1 1 0 8 0 shmpl 112 4 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1531 0 134 88 0 88 88 0 8 0 ffsino 240 1531 0 134 83 0 83 83 0 8 0 nchpl 144 1866 0 263 60 0 60 60 0 8 0 uvmvnodes 72 1637 0 0 30 0 30 30 0 8 0 vnodes 208 1637 0 0 87 0 87 87 0 8 0 namei 1024 4736 0 4736 2 1 1 1 0 8 1 pfiaddrpl 120 4 0 2 1 0 1 1 0 8 0 scxspl 192 5327 0 5327 1 0 1 1 0 8 1 plimitpl 152 22 0 15 1 0 1 1 0 8 0 sigapl 424 306 0 277 4 0 4 4 0 8 0 futexpl 56 2046 0 2046 1 0 1 1 0 8 1 knotepl 112 61 0 42 1 0 1 1 0 8 0 kqueuepl 144 72 0 70 1 0 1 1 0 8 0 pipepl 272 80 0 70 1 0 1 1 0 8 0 fdescpl 432 291 0 277 2 0 2 2 0 8 0 filepl 120 1669 0 1574 4 0 4 4 0 8 1 lockfpl 104 19 0 18 1 0 1 1 0 8 0 lockfspl 48 9 0 8 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 96 141 0 133 1 0 1 1 0 8 0 zombiepl 144 277 0 277 2 1 1 1 0 8 1 processpl 928 306 0 277 4 0 4 4 0 8 0 procpl 624 416 0 380 4 0 4 4 0 8 1 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 400 318 0 300 4 0 4 4 0 8 2 mcl64k 65536 2 0 2 1 0 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 1 0 1 1 0 8 1 mcl4k 4096 21 0 21 2 1 1 1 0 8 1 mcl2k 2048 93021 0 92951 28 11 17 20 0 8 7 mtagpl 96 47 0 4 3 1 2 2 0 8 0 mbufpl 256 147722 0 147498 18 2 16 16 0 8 0 bufpl 280 3391 0 129 233 0 233 233 0 8 0 anonpl 16 46102 0 29447 76 2 74 74 0 107 6 amapchunkpl 152 1496 0 1353 11 0 11 11 0 158 3 amappl16 192 1341 0 418 47 0 47 47 0 8 0 amappl15 184 49 0 47 1 0 1 1 0 8 0 amappl14 176 61 0 55 1 0 1 1 0 8 0 amappl13 168 30 0 26 1 0 1 1 0 8 0 amappl12 160 9 0 7 1 0 1 1 0 8 0 amappl11 152 82 0 71 1 0 1 1 0 8 0 amappl10 144 63 0 58 1 0 1 1 0 8 0 amappl9 136 282 0 281 1 0 1 1 0 8 0 amappl8 128 326 0 286 2 0 2 2 0 8 0 amappl7 120 104 0 93 1 0 1 1 0 8 0 amappl6 112 60 0 54 2 1 1 1 0 8 0 amappl5 104 379 0 367 1 0 1 1 0 8 0 amappl4 96 469 0 434 1 0 1 1 0 8 0 amappl3 88 102 0 96 1 0 1 1 0 8 0 amappl2 80 1563 0 1494 2 0 2 2 0 8 0 amappl1 72 15403 0 14992 22 12 10 17 0 8 1 amappl 80 646 0 604 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 6 0 2 1 0 1 1 0 8 0 uaddrrnd 24 291 0 277 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 291 0 277 1 0 1 1 0 8 0 vmmpekpl 168 5976 0 5947 2 0 2 2 0 8 0 vmmpepl 168 42895 0 40876 158 5 153 153 0 357 63 vmsppl 272 290 0 277 2 0 2 2 0 8 1 pdppl 4096 588 0 554 6 0 6 6 0 8 1 pvpl 32 147105 0 127491 177 0 177 177 0 265 16 pmappl 200 290 0 277 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 262 0 17 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(ffff80001d7777e0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f amap_lookups(fffffd80572c75f8,7000,ffff80001d777930,8) at amap_lookups+0x9d uvm_fault(fffffd806bc09990,ab6a9aca000,0,1) at uvm_fault+0x332 sys/uvm/uvm_fault.c:628 pageflttrap(ffff80001d777c40,1) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff80001d777c40) at usertrap+0x1fb sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xab8e2f0db30, count: -10 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(ffff80001d7777e0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f amap_lookups(fffffd80572c75f8,7000,ffff80001d777930,8) at amap_lookups+0x9d uvm_fault(fffffd806bc09990,ab6a9aca000,0,1) at uvm_fault+0x332 sys/uvm/uvm_fault.c:628 pageflttrap(ffff80001d777c40,1) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff80001d777c40) at usertrap+0x1fb sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xab8e2f0db30, count: -10