login: 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: 0xffff80001d744ea0, 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(ffff80001d744f50,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: 0xc00057d5d0, count: -5 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d744e40 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0 r11 0xb0f90fa1099d403f r12 0xffff80000002ea00 r13 0xc r14 0xfffffd805c6b7c00 r15 0 rip 0xffffffff821f3f21 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d744db0 ss 0 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-fuzzer) pid=218747 stat=onproc flags process=2 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff80001d71cc40,0xffff80001d71c9e0 process=0xffff80001d706018 user=0xffff80001d740000, vmspace=0xfffffd806bc09770 estcpu=30, cpticks=0, pctcpu=5.57 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 29017 168732 1 0 3 0x100083 ttyin getty 2154 396687 0 0 3 0x14280 nfsidl nfsio 28930 51121 0 0 3 0x14280 nfsidl nfsio 32265 469617 0 0 3 0x14280 nfsidl nfsio 197 206165 0 0 3 0x14280 nfsidl nfsio 47982 498065 0 0 3 0x14280 nfsidl nfsio 8152 341783 0 0 3 0x14280 nfsidl nfsio 11801 119187 0 0 3 0x14280 nfsidl nfsio 54011 270988 0 0 3 0x14280 nfsidl nfsio 13628 405332 0 0 3 0x14280 nfsidl nfsio 52574 2771 0 0 3 0x14280 nfsidl nfsio 15659 517090 0 0 3 0x14280 nfsidl nfsio 71727 293422 0 0 3 0x14280 nfsidl nfsio 33976 219015 0 0 3 0x14280 nfsidl nfsio 38707 209236 0 0 3 0x14280 nfsidl nfsio 20695 482182 0 0 3 0x14280 nfsidl nfsio 83453 471102 0 0 3 0x14280 nfsidl nfsio 5898 473990 0 0 3 0x14280 nfsidl nfsio 44643 69139 0 0 3 0x14280 nfsidl nfsio 37610 275513 0 0 3 0x14280 nfsidl nfsio 70425 67955 0 0 3 0x14280 nfsidl nfsio 84841 217353 57271 0 3 0x82 piperd syz-executor.1 87393 500864 0 0 3 0x14200 acct acct 82625 88101 57271 0 3 0x82 piperd syz-executor.0 16719 54223 0 0 3 0x14200 bored sosplice 57271 196411 4791 0 3 0x82 thrsleep syz-fuzzer 57271 56339 4791 0 3 0x4000082 nanosleep syz-fuzzer *57271 218747 4791 0 7 0x4000002 syz-fuzzer 57271 473054 4791 0 2 0x4000002 syz-fuzzer 57271 125076 4791 0 3 0x4000082 thrsleep syz-fuzzer 57271 142817 4791 0 3 0x4000082 thrsleep syz-fuzzer 57271 72937 4791 0 3 0x4000082 thrsleep syz-fuzzer 57271 150790 4791 0 3 0x4000082 thrsleep syz-fuzzer 4791 204853 25837 0 3 0x10008a pause ksh 25837 509124 33717 0 3 0x92 select sshd 33717 120893 1 0 3 0x80 select sshd 67486 176512 70062 73 3 0x100090 kqread syslogd 70062 307831 1 0 3 0x100082 netio syslogd 25306 173777 1 77 3 0x100090 poll dhclient 47136 364103 1 0 3 0x80 poll dhclient 36141 315730 0 0 3 0x14200 bored smr 65898 397755 0 0 2 0x14200 zerothread 11364 269150 0 0 3 0x14200 aiodoned aiodoned 85713 105913 0 0 3 0x14200 syncer update 83019 284863 0 0 3 0x14200 cleaner cleaner 22345 518214 0 0 3 0x14200 reaper reaper 25861 227631 0 0 3 0x14200 pgdaemon pagedaemon 64340 334640 0 0 3 0x14200 bored crynlk 76593 168613 0 0 3 0x14200 bored crypto 56183 94007 0 0 3 0x40014200 acpi0 acpi0 76961 433362 0 0 3 0x14200 bored softnet 31162 345631 0 0 3 0x14200 bored systqmp 17375 50031 0 0 3 0x14200 bored systq 80186 477426 0 0 3 0x40014200 bored softclock 28594 376111 0 0 3 0x40014200 idle0 1 503668 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 9526 6368K 6813K 78643K 12350 0 pcb 13 8K 8K 78643K 241 0 rtable 107 7K 8K 78643K 658 0 ifaddr 106 20K 21K 78643K 260 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 35 0 ioctlops 0 0K 4K 78643K 585 0 iov 0 0K 24K 78643K 180 0 mount 1 1K 1K 78643K 1 0 vnodes 1216 76K 77K 78643K 1835 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 18 0 VM map 2 0K 0K 78643K 2 0 sem 12 1K 1K 78643K 481 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 4 9K 25K 78643K 1624 0 sigio 0 0K 0K 78643K 4 0 proc 52 38K 55K 78643K 545 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 101 0 in_multi 87 4K 4K 78643K 342 0 ether_multi 1 0K 0K 78643K 43 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 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 312 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 117 87K 87K 78643K 4508 0 UVM aobj 58 6K 7K 78643K 64 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 183 0 NDP 15 0K 0K 78643K 60 0 temp 145 3871K 3967K 78643K 31633 0 kqueue 3 4K 12K 78643K 64 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 6 1 0 1 1 0 8 0 rtpcb 80 91 0 89 1 0 1 1 0 8 0 rtentry 112 137 0 103 2 0 2 2 0 8 0 unpcb 120 532 0 524 1 0 1 1 0 8 0 syncache 264 12 0 12 6 6 0 1 0 8 0 tcpqe 32 201 0 201 2 2 0 1 0 8 0 tcpcb 544 386 0 382 1 0 1 1 0 8 0 ipq 40 3 0 2 2 1 1 1 0 8 0 ipqe 40 92 0 91 2 1 1 1 0 8 0 inpcb 296 1228 0 1221 9 8 1 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 46 0 43 1 0 1 1 0 8 0 pkpcb 40 16 0 16 3 3 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1136 3 0 3 2 2 0 1 0 8 0 pfrke_plain 160 5 0 3 1 0 1 1 0 8 0 pfrktable 1344 47 0 39 2 1 1 1 0 8 0 pftag 88 6 0 4 3 2 1 1 0 8 0 pfrule 1360 16 0 10 2 1 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 540 0 388 17 4 13 15 0 8 0 art_table 32 542 0 388 2 0 2 2 0 8 0 art_node 16 132 0 102 1 0 1 1 0 8 0 sysvmsgpl 40 55 0 29 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 467 0 457 1 0 1 1 0 8 0 shmpl 112 61 0 6 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3501 0 2101 88 0 88 88 0 8 0 ffsino 240 3501 0 2101 83 0 83 83 0 8 0 nchpl 144 7213 0 5629 60 0 60 60 0 8 0 rtmask 32 10 0 8 1 0 1 1 0 8 0 uvmvnodes 72 3963 0 0 73 0 73 73 0 8 0 vnodes 208 3963 0 0 209 0 209 209 0 8 0 namei 1024 21897 0 21897 2 2 0 1 0 8 0 vcpupl 1984 10 0 0 2 0 2 2 0 8 0 vmpool 528 12 0 2 1 0 1 1 0 8 0 pfiaddrpl 120 14 0 8 2 1 1 1 0 8 0 scxspl 192 18125 0 18125 1 0 1 1 0 8 1 plimitpl 152 113 0 106 1 0 1 1 0 8 0 sigapl 424 1827 0 1778 6 0 6 6 0 8 0 futexpl 56 33194 0 33194 3 3 0 1 0 8 0 knotepl 112 159 0 140 1 0 1 1 0 8 0 kqueuepl 144 183 0 180 1 0 1 1 0 8 0 pipepl 272 264 0 254 1 0 1 1 0 8 0 fdescpl 432 1791 0 1778 2 0 2 2 0 8 0 filepl 120 13738 0 13643 4 1 3 4 0 8 0 lockfpl 104 342 0 341 1 0 1 1 0 8 0 lockfspl 48 122 0 121 1 0 1 1 0 8 0 sessionpl 112 20 0 10 1 0 1 1 0 8 0 pgrppl 48 30 0 20 1 0 1 1 0 8 0 ucredpl 96 979 0 972 1 0 1 1 0 8 0 zombiepl 144 1778 0 1778 1 1 0 1 0 8 0 processpl 928 1827 0 1778 7 0 7 7 0 8 0 procpl 624 3688 0 3632 6 1 5 5 0 8 0 sosppl 128 17 0 17 8 8 0 1 0 8 0 sockpl 400 1868 0 1851 5 3 2 4 0 8 0 mcl64k 65536 345 0 345 40 40 0 33 0 8 0 mcl16k 16384 7 0 7 4 4 0 1 0 8 0 mcl12k 12288 56 0 56 7 7 0 1 0 8 0 mcl9k 9216 25 0 25 10 10 0 1 0 8 0 mcl8k 8192 57 0 57 7 7 0 1 0 8 0 mcl4k 4096 116 0 116 7 7 0 1 0 8 0 mcl2k2 2112 9 0 9 5 5 0 1 0 8 0 mcl2k 2048 94857 0 94802 24 16 8 19 0 8 0 mtagpl 96 164 0 61 4 1 3 3 0 8 0 mbufpl 256 159612 0 159130 50 19 31 32 0 8 0 bufpl 280 6566 0 1214 383 0 383 383 0 8 0 anonpl 16 182396 0 163918 115 38 77 90 0 107 0 amapchunkpl 152 7153 0 7005 23 16 7 20 0 158 0 amappl16 192 8802 0 7743 97 43 54 63 0 8 0 amappl15 184 266 0 264 1 0 1 1 0 8 0 amappl14 176 1318 0 1314 1 0 1 1 0 8 0 amappl13 168 40 0 37 1 0 1 1 0 8 0 amappl12 160 9 0 7 1 0 1 1 0 8 0 amappl11 152 340 0 331 1 0 1 1 0 8 0 amappl10 144 275 0 270 1 0 1 1 0 8 0 amappl9 136 395 0 393 1 0 1 1 0 8 0 amappl8 128 369 0 343 1 0 1 1 0 8 0 amappl7 120 385 0 371 1 0 1 1 0 8 0 amappl6 112 312 0 307 1 0 1 1 0 8 0 amappl5 104 1435 0 1421 1 0 1 1 0 8 0 amappl4 96 752 0 727 1 0 1 1 0 8 0 amappl3 88 1188 0 1183 1 0 1 1 0 8 0 amappl2 80 13426 0 13365 2 0 2 2 0 8 0 amappl1 72 48582 0 48184 24 15 9 17 0 8 0 amappl 80 3942 0 3900 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 63 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1803 0 1780 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1803 0 1780 1 0 1 1 0 8 0 vmmpekpl 168 13179 0 13143 2 0 2 2 0 8 0 vmmpepl 168 222803 0 220694 175 75 100 125 0 357 0 vmsppl 272 1802 0 1780 3 1 2 2 0 8 0 pdppl 4096 3612 0 3570 8 2 6 6 0 8 0 pvpl 32 487870 0 467829 268 101 167 205 0 265 0 pmappl 200 1802 0 1780 4 2 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 355 0 109 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(ffff80001d744f50,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: 0xc00057d5d0, 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(ffff80001d744f50,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: 0xc00057d5d0, count: -5