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: 0xffff80001d7236d0, 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(ffff80001d723780,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f uvm_fault(fffffd806bc09990,2c0e3c000,1,2) at uvm_fault+0x108f sys/uvm/uvm_fault.c:1217 pageflttrap(ffff80001d723b40,1) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff80001d723b40) at usertrap+0x1fb sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xc000514a90, count: -9 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d723670 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0 r11 0x71ff652cf9e2f03b r12 0xffff80000002ea00 r13 0xc r14 0xfffffd80536df400 r15 0 rip 0xffffffff8144b091 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d7235e0 ss 0 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-fuzzer) pid=356824 stat=onproc flags process=2 proc=0 pri=81, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff80001d71c280,0xffff80001d71c020 process=0xffff80001d706018 user=0xffff80001d71e000, vmspace=0xfffffd806bc09990 estcpu=32, cpticks=17, pctcpu=6.86 user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 34903 391647 0 0 3 0x14200 acct acct 77640 447025 15411 0 3 0x82 piperd syz-executor.0 57174 62963 15411 0 3 0x82 piperd syz-executor.1 *15411 356824 85640 0 7 0x2 syz-fuzzer 15411 422716 85640 0 3 0x4000082 nanosleep syz-fuzzer 15411 446288 85640 0 3 0x4000082 thrsleep syz-fuzzer 15411 520809 85640 0 3 0x4000082 thrsleep syz-fuzzer 15411 408388 85640 0 3 0x4000082 thrsleep syz-fuzzer 15411 221036 85640 0 3 0x4000082 thrsleep syz-fuzzer 15411 297199 85640 0 3 0x4000082 thrsleep syz-fuzzer 15411 384346 85640 0 3 0x4000082 thrsleep syz-fuzzer 85640 454533 4818 0 3 0x10008a pause ksh 4818 303023 98471 0 3 0x92 select sshd 52894 524024 1 0 3 0x100083 ttyin getty 98471 256779 1 0 3 0x80 select sshd 36197 295932 26515 73 3 0x100090 kqread syslogd 26515 489002 1 0 3 0x100082 netio syslogd 58524 270408 1 77 3 0x100090 poll dhclient 80894 344514 1 0 3 0x80 poll dhclient 33532 148421 0 0 3 0x14200 bored smr 73434 97539 0 0 2 0x14200 zerothread 23184 312134 0 0 3 0x14200 aiodoned aiodoned 77 110837 0 0 3 0x14200 syncer update 54453 399189 0 0 3 0x14200 cleaner cleaner 49931 300772 0 0 3 0x14200 reaper reaper 31108 439416 0 0 3 0x14200 pgdaemon pagedaemon 64843 476695 0 0 3 0x14200 bored crynlk 31654 369234 0 0 3 0x14200 bored crypto 98117 94288 0 0 3 0x40014200 acpi0 acpi0 68148 28480 0 0 2 0x14200 softnet 98506 332938 0 0 3 0x14200 bored systqmp 59543 292208 0 0 3 0x14200 bored systq 94248 378949 0 0 3 0x40014200 bored softclock 45757 11739 0 0 3 0x40014200 idle0 1 383070 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 9485 6337K 7241K 78643K 11101 0 pcb 13 8K 8K 78643K 53 0 rtable 94 2K 7K 78643K 356 0 ifaddr 62 12K 14K 78643K 136 0 counters 21 16K 17K 78643K 24 0 ioctlops 0 0K 4K 78643K 63 0 iov 0 0K 12K 78643K 26 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1373 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 36 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 4 9K 25K 78643K 260 0 sigio 0 0K 0K 78643K 8 0 proc 50 38K 54K 78643K 379 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 52 0 in_multi 38 2K 2K 78643K 79 0 ether_multi 1 0K 0K 78643K 7 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 195 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 125 23K 35K 78643K 1421 0 UVM aobj 11 2K 2K 78643K 11 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 26 0 NDP 10 0K 0K 78643K 21 0 temp 91 3850K 3914K 78643K 3751 0 kqueue 3 4K 8K 78643K 9 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 55 0 17 2 0 2 2 0 8 0 unpcb 120 166 0 158 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 42 0 42 1 1 0 1 0 8 0 tcpcb 544 242 0 238 1 0 1 1 0 8 0 inpcb 296 374 0 367 2 0 2 2 0 8 1 nd6 48 10 0 8 1 0 1 1 0 8 0 pfrktable 1344 58 0 58 1 1 0 1 0 8 0 pftag 88 12 0 12 1 1 0 1 0 8 0 pfrule 1360 10 0 10 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 237 0 80 13 0 13 13 0 8 0 art_table 32 238 0 80 2 0 2 2 0 8 0 art_node 16 54 0 18 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 9 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 34 0 24 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1741 0 344 88 0 88 88 0 8 0 ffsino 240 1741 0 344 83 0 83 83 0 8 0 nchpl 144 2281 0 680 60 0 60 60 0 8 0 uvmvnodes 72 1892 0 0 35 0 35 35 0 8 0 vnodes 208 1892 0 0 100 0 100 100 0 8 0 namei 1024 6250 0 6250 1 0 1 1 0 8 1 vmpool 528 2 0 2 1 1 0 1 0 8 0 pfiaddrpl 120 16 0 16 1 1 0 1 0 8 0 scxspl 192 6644 0 6644 1 0 1 1 0 8 1 plimitpl 152 28 0 21 1 0 1 1 0 8 0 sigapl 424 447 0 419 4 0 4 4 0 8 0 futexpl 56 4721 0 4721 1 0 1 1 0 8 1 knotepl 112 73 0 54 1 0 1 1 0 8 0 kqueuepl 144 24 0 22 1 0 1 1 0 8 0 pipepl 272 112 0 102 2 1 1 2 0 8 0 fdescpl 432 432 0 419 2 0 2 2 0 8 0 filepl 120 2669 0 2574 4 0 4 4 0 8 1 lockfpl 104 145 0 144 1 0 1 1 0 8 0 lockfspl 48 44 0 43 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 96 369 0 362 1 0 1 1 0 8 0 zombiepl 144 419 0 419 1 0 1 1 0 8 1 processpl 928 447 0 419 4 0 4 4 0 8 0 procpl 624 719 0 684 5 1 4 4 0 8 1 sockpl 400 569 0 552 4 1 3 4 0 8 1 mcl64k 65536 10 0 10 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl12k 12288 7 0 7 3 2 1 1 0 8 1 mcl9k 9216 2 0 2 2 2 0 1 0 8 0 mcl8k 8192 5 0 4 2 1 1 1 0 8 0 mcl4k 4096 26 0 26 2 2 0 1 0 8 0 mcl2k2 2112 2 0 2 1 1 0 1 0 8 0 mcl2k 2048 94623 0 94575 17 10 7 13 0 8 0 mtagpl 96 21 0 3 2 1 1 1 0 8 0 mbufpl 256 150362 0 150201 18 2 16 16 0 8 0 bufpl 280 3653 0 128 252 0 252 252 0 8 0 anonpl 16 55158 0 38896 73 2 71 71 0 107 0 amapchunkpl 152 1736 0 1610 8 2 6 8 0 158 0 amappl16 192 1987 0 1016 51 1 50 50 0 8 1 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 162 0 158 1 0 1 1 0 8 0 amappl13 168 27 0 24 1 0 1 1 0 8 0 amappl12 160 9 0 7 1 0 1 1 0 8 0 amappl11 152 185 0 175 1 0 1 1 0 8 0 amappl10 144 13 0 8 1 0 1 1 0 8 0 amappl9 136 349 0 347 1 0 1 1 0 8 0 amappl8 128 323 0 282 2 0 2 2 0 8 0 amappl7 120 115 0 101 1 0 1 1 0 8 0 amappl6 112 23 0 18 1 0 1 1 0 8 0 amappl5 104 280 0 270 1 0 1 1 0 8 0 amappl4 96 561 0 532 1 0 1 1 0 8 0 amappl3 88 254 0 247 1 0 1 1 0 8 0 amappl2 80 2634 0 2576 2 0 2 2 0 8 0 amappl1 72 18485 0 18094 24 15 9 17 0 8 0 amappl 80 941 0 903 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 434 0 421 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 434 0 421 1 0 1 1 0 8 0 vmmpekpl 168 6737 0 6709 2 0 2 2 0 8 0 vmmpepl 168 59541 0 57585 121 28 93 112 0 357 4 vmsppl 272 433 0 421 2 1 1 2 0 8 0 pdppl 4096 874 0 842 6 1 5 6 0 8 0 pvpl 32 176499 0 157334 169 4 165 169 0 265 0 pmappl 200 433 0 421 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 254 0 25 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(ffff80001d723780,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f uvm_fault(fffffd806bc09990,2c0e3c000,1,2) at uvm_fault+0x108f sys/uvm/uvm_fault.c:1217 pageflttrap(ffff80001d723b40,1) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff80001d723b40) at usertrap+0x1fb sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xc000514a90, count: -9 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(ffff80001d723780,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f uvm_fault(fffffd806bc09990,2c0e3c000,1,2) at uvm_fault+0x108f sys/uvm/uvm_fault.c:1217 pageflttrap(ffff80001d723b40,1) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff80001d723b40) at usertrap+0x1fb sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xc000514a90, count: -9