uvm_fault(0xfffffd80565d1010, 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(0xfffffd80565d1010, 0xa, 0, 1) -> e vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 end trace frame: 0xffff80001e7aaaf0, 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(ffff80001e7aaba0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f amap_lookups(fffffd8057421d98,1000,ffff80001e7aacf0,6) at amap_lookups+0x6f sys/uvm/uvm_amap.c:1052 uvm_fault(fffffd80565d1010,1ab4f08d000,0,1) at uvm_fault+0x332 sys/uvm/uvm_fault.c:628 pageflttrap(ffff80001e7ab000,1) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff80001e7ab000) at usertrap+0x1fb sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffdbff0, count: -10 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001e7aaa90 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0 r11 0xb4292280683ea12a r12 0xffff80000002ea00 r13 0xc r14 0xfffffd8056904f00 r15 0 rip 0xffffffff8208fa11 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001e7aaa00 ss 0 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-executor.1) pid=504462 stat=onproc flags process=0 proc=0 pri=72, usrpri=72, nice=20 forw=0xffffffffffffffff, list=0xffff80001d71d870,0xffff80001d6a94f8 process=0xffff80001d6c4af0 user=0xffff80001e7a6000, vmspace=0xfffffd80565d1010 estcpu=22, cpticks=0, pctcpu=0.1 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *48539 504462 33599 0 7 0 syz-executor.1 48539 75500 33599 0 3 0x4000080 fsleep syz-executor.1 27959 14889 0 0 3 0x14200 bored sosplice 33599 141083 63799 0 3 0x82 nanosleep syz-executor.1 28311 258540 63799 0 2 0x2 syz-executor.0 63799 343280 87628 0 3 0x82 thrsleep syz-fuzzer 63799 80358 87628 0 3 0x4000082 nanosleep syz-fuzzer 63799 30397 87628 0 3 0x4000082 thrsleep syz-fuzzer 63799 503851 87628 0 3 0x4000082 thrsleep syz-fuzzer 63799 157914 87628 0 3 0x4000082 thrsleep syz-fuzzer 63799 421492 87628 0 3 0x4000082 kqread syz-fuzzer 63799 514498 87628 0 3 0x4000082 thrsleep syz-fuzzer 63799 478579 87628 0 3 0x4000082 thrsleep syz-fuzzer 87628 92498 60091 0 3 0x10008a pause ksh 60091 92387 22038 0 3 0x92 select sshd 89538 406207 1 0 3 0x100083 ttyin getty 22038 24421 1 0 3 0x80 select sshd 2052 523593 40929 73 3 0x100090 kqread syslogd 40929 178354 1 0 3 0x100082 netio syslogd 82982 331687 1 77 3 0x100090 poll dhclient 54809 7115 1 0 3 0x80 poll dhclient 20787 191640 0 0 3 0x14200 bored smr 1346 218203 0 0 2 0x14200 zerothread 37569 415651 0 0 3 0x14200 aiodoned aiodoned 57289 60094 0 0 3 0x14200 syncer update 24558 466416 0 0 3 0x14200 cleaner cleaner 22500 21823 0 0 3 0x14200 reaper reaper 54827 300016 0 0 3 0x14200 pgdaemon pagedaemon 21962 219588 0 0 3 0x14200 bored crynlk 80561 492523 0 0 3 0x14200 bored crypto 43263 234903 0 0 3 0x40014200 acpi0 acpi0 60677 415824 0 0 3 0x14200 bored softnet 56858 433884 0 0 3 0x14200 bored systqmp 27412 521100 0 0 3 0x14200 bored systq 41062 422687 0 0 3 0x40014200 bored softclock 8084 246306 0 0 3 0x40014200 idle0 1 408861 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 9500 6351K 6728K 78643K 11254 0 pcb 13 8K 8K 78643K 438 0 rtable 137 7K 10K 78643K 564 0 ifaddr 79 16K 16K 78643K 205 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 28 0 ioctlops 0 0K 4K 78643K 110 0 iov 0 0K 24K 78643K 124 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1416 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 69 0 dirhash 9 1K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 835 0 sigio 0 0K 0K 78643K 4 0 proc 50 38K 54K 78643K 389 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 43 0 in_multi 47 2K 3K 78643K 168 0 ether_multi 1 0K 0K 78643K 17 0 mrt 0 0K 0K 78643K 10 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 197 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 160 106K 106K 78643K 2764 0 UVM aobj 31 2K 2K 78643K 33 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 103 0 NDP 12 0K 0K 78643K 40 0 temp 115 3858K 3922K 78643K 8987 0 kqueue 3 4K 14K 78643K 41 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 47 0 45 1 0 1 1 0 8 0 rtentry 112 101 0 51 2 0 2 2 0 8 0 unpcb 120 235 0 227 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 661 0 661 1 1 0 1 0 8 0 tcpcb 544 467 0 459 5 4 1 3 0 8 0 ipq 40 3 0 3 1 1 0 1 0 8 0 ipqe 40 6 0 6 1 1 0 1 0 8 0 inpcb 296 1713 0 1705 5 3 2 2 0 8 1 rttmr 72 5 0 5 3 3 0 1 0 8 0 nd6 48 41 0 30 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 ppxss 1136 3 0 3 3 3 0 1 0 8 0 pfstscr 40 6 0 3 1 0 1 1 0 8 0 pfrktable 1344 85 0 79 3 2 1 2 0 8 0 pftag 88 16 0 12 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 112 8 0 4 1 0 1 1 0 8 0 pfstate 328 4 0 2 1 0 1 1 0 8 0 pfrule 1360 30 0 20 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 485 0 232 17 1 16 16 0 8 0 art_table 32 487 0 232 3 0 3 3 0 8 0 art_node 16 94 0 48 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 8 1 0 1 1 0 8 0 semupl 112 6 0 6 1 1 0 1 0 8 0 semapl 112 63 0 53 1 0 1 1 0 8 0 shmpl 112 30 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 10 3 1 2 3 0 8 0 dino2pl 256 2376 0 977 88 0 88 88 0 8 0 ffsino 240 2376 0 977 83 0 83 83 0 8 0 nchpl 144 4126 0 2520 60 0 60 60 0 8 0 uvmvnodes 72 2559 0 0 47 0 47 47 0 8 0 vnodes 208 2559 0 0 135 0 135 135 0 8 0 namei 1024 10559 0 10559 4 3 1 1 0 8 1 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 528 16 0 8 1 0 1 1 0 8 0 pfiaddrpl 120 24 0 22 1 0 1 1 0 8 0 scxspl 192 10677 0 10677 2 1 1 1 0 8 1 plimitpl 152 63 0 56 1 0 1 1 0 8 0 sigapl 424 1023 0 994 4 0 4 4 0 8 0 futexpl 56 16628 0 16627 4 3 1 1 0 8 0 knotepl 112 116 0 97 1 0 1 1 0 8 0 kqueuepl 144 298 0 296 1 0 1 1 0 8 0 pipepl 272 148 0 138 1 0 1 1 0 8 0 fdescpl 432 1007 0 993 2 0 2 2 0 8 0 filepl 120 6538 0 6443 5 1 4 4 0 8 1 lockfpl 104 121 0 120 1 0 1 1 0 8 0 lockfspl 48 42 0 41 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 27 0 17 1 0 1 1 0 8 0 ucredpl 96 461 0 454 1 0 1 1 0 8 0 zombiepl 144 994 0 994 1 0 1 1 0 8 1 processpl 928 1023 0 994 4 0 4 4 0 8 0 procpl 624 2022 0 1985 6 2 4 4 0 8 1 sosppl 128 6 0 6 3 3 0 1 0 8 0 sockpl 400 2009 0 1992 7 3 4 4 0 8 2 mcl64k 65536 61 0 61 5 4 1 1 0 8 1 mcl16k 16384 5 0 5 4 4 0 1 0 8 0 mcl12k 12288 17 0 17 5 4 1 1 0 8 1 mcl9k 9216 16 0 15 4 3 1 1 0 8 0 mcl8k 8192 53 0 53 5 4 1 1 0 8 1 mcl4k 4096 58 0 58 5 4 1 1 0 8 1 mcl2k2 2112 2 0 2 2 2 0 1 0 8 0 mcl2k 2048 93817 0 93754 26 17 9 20 0 8 0 mtagpl 96 68 0 30 2 1 1 1 0 8 0 mbufpl 256 153824 0 153418 32 5 27 27 0 8 0 bufpl 280 4461 0 126 310 0 310 310 0 8 0 anonpl 16 103770 0 86590 88 9 79 86 0 107 1 amapchunkpl 152 3847 0 3691 11 4 7 11 0 158 0 amappl16 192 3989 0 2964 67 13 54 64 0 8 2 amappl15 184 804 0 800 1 0 1 1 0 8 0 amappl14 176 23 0 19 1 0 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 10 0 7 1 0 1 1 0 8 0 amappl11 152 45 0 36 1 0 1 1 0 8 0 amappl10 144 814 0 806 1 0 1 1 0 8 0 amappl9 136 378 0 377 1 0 1 1 0 8 0 amappl8 128 358 0 303 2 0 2 2 0 8 0 amappl7 120 911 0 894 1 0 1 1 0 8 0 amappl6 112 29 0 21 1 0 1 1 0 8 0 amappl5 104 978 0 967 1 0 1 1 0 8 0 amappl4 96 428 0 400 1 0 1 1 0 8 0 amappl3 88 138 0 132 1 0 1 1 0 8 0 amappl2 80 7281 0 7216 2 0 2 2 0 8 0 amappl1 72 31158 0 30739 22 13 9 17 0 8 0 amappl 80 2252 0 2202 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 32 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1023 0 1001 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1023 0 1001 1 0 1 1 0 8 0 vmmpekpl 168 9531 0 9499 2 0 2 2 0 8 0 vmmpepl 168 128155 0 125990 135 33 102 119 0 357 5 vmsppl 272 1022 0 1001 3 1 2 2 0 8 0 pdppl 4096 2052 0 2010 8 2 6 6 0 8 0 pvpl 32 297593 0 277523 206 13 193 200 0 265 14 pmappl 200 1022 0 1001 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 307 0 57 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(ffff80001e7aaba0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f amap_lookups(fffffd8057421d98,1000,ffff80001e7aacf0,6) at amap_lookups+0x6f sys/uvm/uvm_amap.c:1052 uvm_fault(fffffd80565d1010,1ab4f08d000,0,1) at uvm_fault+0x332 sys/uvm/uvm_fault.c:628 pageflttrap(ffff80001e7ab000,1) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff80001e7ab000) at usertrap+0x1fb sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffdbff0, 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(ffff80001e7aaba0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f amap_lookups(fffffd8057421d98,1000,ffff80001e7aacf0,6) at amap_lookups+0x6f sys/uvm/uvm_amap.c:1052 uvm_fault(fffffd80565d1010,1ab4f08d000,0,1) at uvm_fault+0x332 sys/uvm/uvm_fault.c:628 pageflttrap(ffff80001e7ab000,1) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 usertrap(ffff80001e7ab000) at usertrap+0x1fb sys/arch/amd64/amd64/trap.c:384 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7ffffdbff0, count: -10