uvm_fault(0xfffffd806bc09000, 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(0xfffffd806bc09000, 0xa, 0, 1) -> e vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 end trace frame: 0xffff80001d73f700, 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(ffff80001d73f7b0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 kd_curproc sys/dev/kcov.c:75 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 sys/dev/kcov.c:79 ffs_write(ffff80001d73f990) at ffs_write+0x848 sys/ufs/ffs/ffs_vnops.c:400 VOP_WRITE(fffffd805fa659d0,ffff80001d73fa48,3,fffffd806c3bfba0) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 ktrwriteraw(ffff80001d71c9d0,fffffd805fa659d0,fffffd806c3bfba0,ffff80001d73fb10,ffff80001d73faf0) at ktrwriteraw+0x145 sys/kern/kern_ktrace.c:660 ktrstruct(ffff80001d71c9d0,ffffffff823d4b16,ffff80001d73fbc8,10) at ktrstruct+0x163 ktrwrite2 sys/kern/kern_ktrace.c:625 [inline] ktrstruct(ffff80001d71c9d0,ffffffff823d4b16,ffff80001d73fbc8,10) at ktrstruct+0x163 sys/kern/kern_ktrace.c:309 sys_clock_gettime(ffff80001d71c9d0,ffff80001d73fc30,ffff80001d73fc80) at sys_clock_gettime+0xfb sys/kern/kern_time.c:171 syscall(ffff80001d73fd00) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0012efec8, count: -13 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d73f6a0 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0 r11 0xa0fe21264d14aca9 r12 0xffff80000002ea00 r13 0xc r14 0xfffffd8061d0ef00 r15 0 rip 0xffffffff8144b091 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d73f610 ss 0x10 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-fuzzer) pid=133123 stat=onproc flags process=2 proc=4000001 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d71c010,0xffff80001d71cc50 process=0xffff80001d707978 user=0xffff80001d73a000, vmspace=0xfffffd806bc09000 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 55260 413745 10178 0 3 0x2 biowait syz-executor.0 89073 325509 10178 0 3 0x2 biowait syz-executor.1 10178 356962 69562 0 3 0x82 thrsleep syz-fuzzer 10178 510204 69562 0 3 0x4000082 nanosleep syz-fuzzer *10178 133123 69562 0 7 0x4000003 syz-fuzzer 10178 329648 69562 0 3 0x4000082 thrsleep syz-fuzzer 10178 239074 69562 0 3 0x4000082 thrsleep syz-fuzzer 10178 351797 69562 0 3 0x4000082 thrsleep syz-fuzzer 10178 316134 69562 0 3 0x4000082 thrsleep syz-fuzzer 69562 305084 32812 0 3 0x10008a pause ksh 32812 441963 7074 0 2 0x12 sshd 30919 154361 1 0 3 0x100083 ttyin getty 7074 201208 1 0 3 0x80 select sshd 94381 442938 22631 73 3 0x100090 kqread syslogd 22631 95063 1 0 3 0x100082 netio syslogd 98337 102790 1 77 3 0x100090 poll dhclient 8153 403475 1 0 3 0x80 poll dhclient 49181 7523 0 0 3 0x14200 bored smr 14622 289155 0 0 3 0x14200 pgzero zerothread 57937 312706 0 0 3 0x14200 aiodoned aiodoned 27856 436564 0 0 3 0x14200 syncer update 17574 152905 0 0 3 0x14200 cleaner cleaner 60975 245690 0 0 3 0x14200 reaper reaper 89409 51002 0 0 3 0x14200 pgdaemon pagedaemon 18172 53061 0 0 3 0x14200 bored crynlk 81019 400624 0 0 3 0x14200 bored crypto 53314 390900 0 0 3 0x40014200 acpi0 acpi0 44339 201933 0 0 3 0x14200 bored softnet 6771 301977 0 0 3 0x14200 bored systqmp 4977 19559 0 0 3 0x14200 bored systq 42497 326495 0 0 3 0x40014200 bored softclock 8188 80991 0 0 3 0x40014200 idle0 1 25434 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 9462 6329K 7424K 78643K 11233 0 pcb 13 8K 8K 78643K 43 0 rtable 90 5K 9K 78643K 329 0 ifaddr 49 11K 13K 78643K 88 0 counters 21 16K 16K 78643K 21 0 ioctlops 0 0K 4K 78643K 129 0 iov 0 0K 12K 78643K 14 0 mount 1 1K 1K 78643K 1 0 vnodes 1231 77K 78K 78643K 1387 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 22 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 4 9K 25K 78643K 145 0 sigio 0 0K 0K 78643K 4 0 proc 48 38K 63K 78643K 359 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 11 0 in_multi 26 1K 2K 78643K 60 0 ether_multi 1 0K 0K 78643K 4 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 183 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 120 22K 24K 78643K 1171 0 UVM aobj 5 2K 2K 78643K 5 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 16 0 NDP 7 0K 0K 78643K 15 0 temp 71 3849K 3913K 78643K 2263 0 kqueue 3 4K 8K 78643K 13 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 19 0 17 1 0 1 1 0 8 0 rtentry 112 55 0 24 2 0 2 2 0 8 0 unpcb 120 111 0 103 1 0 1 1 0 8 0 syncache 264 4 0 4 2 2 0 1 0 8 0 tcpqe 32 43 0 43 1 1 0 1 0 8 0 tcpcb 544 38 0 34 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 8 0 8 1 1 0 1 0 8 0 inpcb 296 146 0 139 3 1 2 2 0 8 1 nd6 48 10 0 6 1 0 1 1 0 8 0 pfrktable 1344 55 0 50 2 1 1 2 0 8 0 pftag 88 8 0 8 1 1 0 1 0 8 0 pfrule 1360 16 0 8 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 224 0 87 13 1 12 13 0 8 0 art_table 32 225 0 87 2 0 2 2 0 8 0 art_node 16 54 0 26 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 20 0 10 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1571 0 173 88 0 88 88 0 8 0 ffsino 240 1571 0 173 83 0 83 83 0 8 0 nchpl 144 1960 0 358 60 0 60 60 0 8 0 uvmvnodes 72 1766 0 0 33 0 33 33 0 8 0 vnodes 208 1766 0 0 93 0 93 93 0 8 0 namei 1024 5144 0 5143 4 3 1 1 0 8 0 vmpool 528 2 0 2 1 1 0 1 0 8 0 pfiaddrpl 120 20 0 16 1 0 1 1 0 8 0 scxspl 192 5915 0 5913 1 0 1 1 0 8 0 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 424 331 0 304 4 0 4 4 0 8 0 futexpl 56 2862 0 2862 2 1 1 1 0 8 1 knotepl 112 77 0 58 1 0 1 1 0 8 0 kqueuepl 144 29 0 27 1 0 1 1 0 8 0 pipepl 272 88 0 78 2 1 1 1 0 8 0 fdescpl 432 317 0 304 2 0 2 2 0 8 0 filepl 120 1883 0 1788 4 0 4 4 0 8 1 lockfpl 104 52 0 51 1 0 1 1 0 8 0 lockfspl 48 18 0 17 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 96 114 0 107 1 0 1 1 0 8 0 zombiepl 144 304 0 304 2 1 1 1 0 8 1 processpl 928 331 0 304 4 0 4 4 0 8 0 procpl 624 476 0 443 4 0 4 4 0 8 1 sockpl 400 276 0 259 4 1 3 3 0 8 1 mcl64k 65536 5 0 3 1 0 1 1 0 8 0 mcl12k 12288 2 0 2 1 1 0 1 0 8 0 mcl9k 9216 2 0 2 2 2 0 1 0 8 0 mcl8k 8192 4 0 4 1 1 0 1 0 8 0 mcl4k 4096 21 0 21 3 3 0 1 0 8 0 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 95256 0 95209 16 9 7 14 0 8 0 mtagpl 96 23 0 2 2 1 1 1 0 8 0 mbufpl 256 150944 0 150524 32 5 27 28 0 8 0 bufpl 280 3555 0 125 245 0 245 245 0 8 0 anonpl 16 57085 0 40456 87 10 77 85 0 107 8 amapchunkpl 152 1502 0 1358 11 5 6 11 0 158 0 amappl16 192 2015 0 1095 59 12 47 59 0 8 0 amappl15 184 2 0 0 1 0 1 1 0 8 0 amappl14 176 80 0 74 1 0 1 1 0 8 0 amappl13 168 82 0 78 2 1 1 1 0 8 0 amappl12 160 10 0 10 2 2 0 1 0 8 0 amappl11 152 44 0 35 1 0 1 1 0 8 0 amappl10 144 22 0 16 1 0 1 1 0 8 0 amappl9 136 374 0 372 1 0 1 1 0 8 0 amappl8 128 323 0 282 2 0 2 2 0 8 0 amappl7 120 106 0 95 1 0 1 1 0 8 0 amappl6 112 24 0 19 3 2 1 1 0 8 0 amappl5 104 264 0 255 1 0 1 1 0 8 0 amappl4 96 476 0 447 1 0 1 1 0 8 0 amappl3 88 161 0 154 1 0 1 1 0 8 0 amappl2 80 1716 0 1658 3 1 2 2 0 8 0 amappl1 72 15873 0 15474 24 15 9 17 0 8 0 amappl 80 702 0 660 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 319 0 306 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 319 0 306 1 0 1 1 0 8 0 vmmpekpl 168 6017 0 5990 2 0 2 2 0 8 0 vmmpepl 168 46372 0 44458 130 26 104 118 0 357 13 vmsppl 272 318 0 306 2 1 1 2 0 8 0 pdppl 4096 644 0 612 6 1 5 6 0 8 0 pvpl 32 165624 0 146122 204 11 193 203 0 265 30 pmappl 200 318 0 306 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 267 0 28 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(ffff80001d73f7b0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 kd_curproc sys/dev/kcov.c:75 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 sys/dev/kcov.c:79 ffs_write(ffff80001d73f990) at ffs_write+0x848 sys/ufs/ffs/ffs_vnops.c:400 VOP_WRITE(fffffd805fa659d0,ffff80001d73fa48,3,fffffd806c3bfba0) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 ktrwriteraw(ffff80001d71c9d0,fffffd805fa659d0,fffffd806c3bfba0,ffff80001d73fb10,ffff80001d73faf0) at ktrwriteraw+0x145 sys/kern/kern_ktrace.c:660 ktrstruct(ffff80001d71c9d0,ffffffff823d4b16,ffff80001d73fbc8,10) at ktrstruct+0x163 ktrwrite2 sys/kern/kern_ktrace.c:625 [inline] ktrstruct(ffff80001d71c9d0,ffffffff823d4b16,ffff80001d73fbc8,10) at ktrstruct+0x163 sys/kern/kern_ktrace.c:309 sys_clock_gettime(ffff80001d71c9d0,ffff80001d73fc30,ffff80001d73fc80) at sys_clock_gettime+0xfb sys/kern/kern_time.c:171 syscall(ffff80001d73fd00) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0012efec8, count: -13 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(ffff80001d73f7b0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 kd_curproc sys/dev/kcov.c:75 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 sys/dev/kcov.c:79 ffs_write(ffff80001d73f990) at ffs_write+0x848 sys/ufs/ffs/ffs_vnops.c:400 VOP_WRITE(fffffd805fa659d0,ffff80001d73fa48,3,fffffd806c3bfba0) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 ktrwriteraw(ffff80001d71c9d0,fffffd805fa659d0,fffffd806c3bfba0,ffff80001d73fb10,ffff80001d73faf0) at ktrwriteraw+0x145 sys/kern/kern_ktrace.c:660 ktrstruct(ffff80001d71c9d0,ffffffff823d4b16,ffff80001d73fbc8,10) at ktrstruct+0x163 ktrwrite2 sys/kern/kern_ktrace.c:625 [inline] ktrstruct(ffff80001d71c9d0,ffffffff823d4b16,ffff80001d73fbc8,10) at ktrstruct+0x163 sys/kern/kern_ktrace.c:309 sys_clock_gettime(ffff80001d71c9d0,ffff80001d73fc30,ffff80001d73fc80) at sys_clock_gettime+0xfb sys/kern/kern_time.c:171 syscall(ffff80001d73fd00) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc0012efec8, count: -13