uvm_fault(0xfffffd806bc0acc0, 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(0xfffffd806bc0acc0, 0xa, 0, 1) -> e vio_rxeof(ffff80000017a000) at vio_rxeof+0x191 sys/dev/pv/if_vio.c:1018 end trace frame: 0xffff80001d791530, 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(ffff80001d7915e0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f Xspllower() at Xspllower+0x19 free(ffff800000b0a000,7f,10000) at free+0x206 sys/kern/kern_malloc.c:439 ufs_readdir(ffff80001d791980) at ufs_readdir+0x399 sys/ufs/ufs/ufs_vnops.c:1509 VOP_READDIR(fffffd80575479d8,ffff80001d791a00,fffffd806c3bfa80,ffff80001d791a44) at VOP_READDIR+0xc6 sys/kern/vfs_vops.c:520 sys_getdents(ffff80001d75c770,ffff80001d791ac0,ffff80001d791b10) at sys_getdents+0x21b sys/kern/vfs_syscalls.c:3121 syscall(ffff80001d791b90) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd5470, count: -12 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d7914d0 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0x1 r10 0x9318cfee4f936309 r11 0x8f6b56c11389062b r12 0xffff80000002ea00 r13 0xc r14 0xfffffd8062e27600 r15 0 rip 0xffffffff818c1ac1 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d791440 ss 0x10 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-executor.1) pid=218292 stat=onproc flags process=2 proc=0 pri=77, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff80001d75c290,0xffff80001d75c030 process=0xffff80001d79e030 user=0xffff80001d78c000, vmspace=0xfffffd806bc0acc0 estcpu=36, cpticks=0, pctcpu=0.2 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 65672 261221 4315 0 2 0 syz-executor.0 *35098 218292 34269 0 7 0x2 syz-executor.1 17847 58494 0 0 3 0x14200 bored sosplice 43253 353904 0 0 3 0x14200 acct acct 42167 234406 0 0 3 0x14280 nfsidl nfsio 33293 30292 0 0 3 0x14280 nfsidl nfsio 24803 401678 0 0 3 0x14280 nfsidl nfsio 32438 474122 0 0 3 0x14280 nfsidl nfsio 22091 524224 0 0 3 0x14280 nfsidl nfsio 66818 63636 0 0 3 0x14280 nfsidl nfsio 45819 497225 0 0 3 0x14280 nfsidl nfsio 91617 302995 0 0 3 0x14280 nfsidl nfsio 31531 108599 0 0 3 0x14280 nfsidl nfsio 60745 240278 0 0 3 0x14280 nfsidl nfsio 32261 203879 0 0 3 0x14280 nfsidl nfsio 49222 381896 0 0 3 0x14280 nfsidl nfsio 78754 186583 0 0 3 0x14280 nfsidl nfsio 98629 148456 0 0 3 0x14280 nfsidl nfsio 35792 193611 0 0 3 0x14280 nfsidl nfsio 24930 374073 0 0 3 0x14280 nfsidl nfsio 20593 142612 0 0 3 0x14280 nfsidl nfsio 18919 254115 0 0 3 0x14280 nfsidl nfsio 62603 292502 0 0 3 0x14280 nfsidl nfsio 2744 458919 0 0 3 0x14280 nfsidl nfsio 4315 511214 34269 0 3 0x82 nanosleep syz-executor.0 34269 123598 85307 0 3 0x82 thrsleep syz-fuzzer 34269 493494 85307 0 3 0x4000082 nanosleep syz-fuzzer 34269 184560 85307 0 3 0x4000082 thrsleep syz-fuzzer 34269 35695 85307 0 3 0x4000082 thrsleep syz-fuzzer 34269 55504 85307 0 3 0x4000082 thrsleep syz-fuzzer 34269 293613 85307 0 3 0x4000082 kqread syz-fuzzer 34269 346305 85307 0 3 0x4000082 thrsleep syz-fuzzer 34269 427979 85307 0 3 0x4000082 thrsleep syz-fuzzer 85307 383488 53629 0 3 0x10008a pause ksh 53629 71746 56189 0 3 0x92 select sshd 74960 158682 1 0 3 0x100083 ttyin getty 56189 120 1 0 3 0x80 select sshd 82272 152909 34459 73 3 0x100090 kqread syslogd 34459 9232 1 0 3 0x100082 netio syslogd 49041 422920 1 77 3 0x100090 poll dhclient 86665 104155 1 0 3 0x80 poll dhclient 3283 430429 0 0 3 0x14200 bored smr 24552 290917 0 0 3 0x14200 pgzero zerothread 80770 131408 0 0 3 0x14200 aiodoned aiodoned 49655 475154 0 0 3 0x14200 syncer update 76431 13105 0 0 3 0x14200 cleaner cleaner 58110 84165 0 0 3 0x14200 reaper reaper 34197 422774 0 0 3 0x14200 pgdaemon pagedaemon 52284 380628 0 0 3 0x14200 bored crynlk 47603 318407 0 0 3 0x14200 bored crypto 36405 483492 0 0 3 0x40014200 acpi0 acpi0 28590 288649 0 0 3 0x14200 bored softnet 81206 278747 0 0 3 0x14200 bored systqmp 28706 507246 0 0 3 0x14200 bored systq 2093 26951 0 0 3 0x40014200 bored softclock 53158 351094 0 0 3 0x40014200 idle0 1 99611 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 6591K 78643K 11047 0 pcb 13 8K 8K 78643K 81 0 rtable 87 11K 15K 78643K 615 0 ifaddr 58 12K 13K 78643K 196 0 sysctl 3 1K 1K 78643K 3 0 counters 21 16K 16K 78643K 28 0 ioctlops 0 0K 4K 78643K 72 0 iov 0 0K 16K 78643K 52 0 mount 1 1K 1K 78643K 1 0 vnodes 1231 77K 78K 78643K 1398 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 68 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 432 0 sigio 0 0K 0K 78643K 2 0 proc 49 38K 55K 78643K 433 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 37 0 in_multi 41 2K 2K 78643K 98 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 8 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 238 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 129 39K 55K 78643K 1981 0 UVM aobj 24 2K 3K 78643K 26 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 48 0 NDP 9 0K 0K 78643K 23 0 temp 98 3922K 3922K 78643K 9212 0 kqueue 3 4K 8K 78643K 15 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 10 0 3 1 0 1 1 0 8 0 rtpcb 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 76 0 44 2 0 2 2 0 8 0 unpcb 120 229 0 221 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 560 0 560 1 1 0 1 0 8 0 tcpcb 544 96 0 92 1 0 1 1 0 8 0 ipq 40 5 0 5 3 2 1 1 0 8 1 ipqe 40 143 0 143 3 2 1 1 0 8 1 inpcb 296 324 0 317 5 3 2 2 0 8 1 rttmr 72 4 0 4 1 1 0 1 0 8 0 nd6 48 13 0 7 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1136 1 0 1 1 1 0 1 0 8 0 pfrktable 1344 128 0 128 3 2 1 1 0 8 1 pftag 88 24 0 24 3 2 1 1 0 8 1 pfrule 1360 20 0 20 3 2 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 406 0 252 15 3 12 13 0 8 1 art_table 32 407 0 252 2 0 2 2 0 8 0 art_node 16 72 0 45 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 14 3 2 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 60 0 50 1 0 1 1 0 8 0 shmpl 112 23 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2079 0 680 89 0 89 89 0 8 0 ffsino 240 2079 0 680 83 0 83 83 0 8 0 nchpl 144 2972 0 1382 60 0 60 60 0 8 0 uvmvnodes 72 2250 0 0 41 0 41 41 0 8 0 vnodes 208 2250 0 0 119 0 119 119 0 8 0 namei 1024 9164 0 9164 2 1 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 528 2 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 38 0 38 3 2 1 1 0 8 1 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 8332 0 8332 1 0 1 1 0 8 1 plimitpl 152 41 0 34 1 0 1 1 0 8 0 sigapl 424 637 0 587 6 0 6 6 0 8 0 futexpl 56 7626 0 7626 1 0 1 1 0 8 1 knotepl 112 88 0 69 1 0 1 1 0 8 0 kqueuepl 144 32 0 29 1 0 1 1 0 8 0 pipepl 272 134 0 124 2 1 1 2 0 8 0 fdescpl 432 601 0 587 2 0 2 2 0 8 0 filepl 120 3669 0 3573 4 0 4 4 0 8 1 lockfpl 104 80 0 79 1 0 1 1 0 8 0 lockfspl 48 32 0 31 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 24 0 14 1 0 1 1 0 8 0 ucredpl 96 364 0 357 1 0 1 1 0 8 0 zombiepl 144 587 0 587 2 1 1 1 0 8 1 processpl 928 637 0 587 7 0 7 7 0 8 0 procpl 624 1249 0 1192 7 2 5 6 0 8 0 sosppl 128 4 0 4 2 2 0 1 0 8 0 sockpl 400 590 0 573 4 1 3 4 0 8 1 mcl64k 65536 19 0 19 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 15 0 15 3 2 1 1 0 8 1 mcl9k 9216 10 0 10 3 2 1 1 0 8 1 mcl8k 8192 14 0 14 3 2 1 1 0 8 1 mcl4k 4096 42 0 42 2 1 1 1 0 8 1 mcl2k2 2112 4 0 4 1 1 0 1 0 8 0 mcl2k 2048 93525 0 93463 29 20 9 22 0 8 0 mtagpl 96 31 0 22 2 1 1 1 0 8 0 mbufpl 256 150660 0 150560 34 20 14 21 0 8 4 bufpl 280 3950 0 126 274 0 274 274 0 8 0 anonpl 16 77534 0 61775 93 18 75 83 0 107 7 amapchunkpl 152 3373 0 3239 35 15 20 20 0 158 14 amappl16 192 3289 0 2378 70 16 54 58 0 8 8 amappl15 184 193 0 190 1 0 1 1 0 8 0 amappl14 176 26 0 18 1 0 1 1 0 8 0 amappl13 168 89 0 85 1 0 1 1 0 8 0 amappl12 160 15 0 12 1 0 1 1 0 8 0 amappl11 152 46 0 37 1 0 1 1 0 8 0 amappl10 144 19 0 13 1 0 1 1 0 8 0 amappl9 136 357 0 356 1 0 1 1 0 8 0 amappl8 128 362 0 317 2 0 2 2 0 8 0 amappl7 120 120 0 108 1 0 1 1 0 8 0 amappl6 112 23 0 20 1 0 1 1 0 8 0 amappl5 104 567 0 556 1 0 1 1 0 8 0 amappl4 96 493 0 464 1 0 1 1 0 8 0 amappl3 88 121 0 115 1 0 1 1 0 8 0 amappl2 80 4061 0 4004 2 0 2 2 0 8 0 amappl1 72 23615 0 23220 23 13 10 17 0 8 0 amappl 80 1465 0 1425 3 1 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 25 0 2 1 0 1 1 0 8 0 uaddrrnd 24 603 0 587 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 603 0 587 1 0 1 1 0 8 0 vmmpekpl 168 8050 0 8017 2 0 2 2 0 8 0 vmmpepl 168 81667 0 79688 147 33 114 124 0 357 25 vmsppl 272 602 0 587 3 1 2 2 0 8 1 pdppl 4096 1212 0 1176 6 1 5 6 0 8 0 pvpl 32 224934 0 206257 209 28 181 196 0 265 22 pmappl 200 602 0 587 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 292 0 59 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(ffff80001d7915e0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f Xspllower() at Xspllower+0x19 free(ffff800000b0a000,7f,10000) at free+0x206 sys/kern/kern_malloc.c:439 ufs_readdir(ffff80001d791980) at ufs_readdir+0x399 sys/ufs/ufs/ufs_vnops.c:1509 VOP_READDIR(fffffd80575479d8,ffff80001d791a00,fffffd806c3bfa80,ffff80001d791a44) at VOP_READDIR+0xc6 sys/kern/vfs_vops.c:520 sys_getdents(ffff80001d75c770,ffff80001d791ac0,ffff80001d791b10) at sys_getdents+0x21b sys/kern/vfs_syscalls.c:3121 syscall(ffff80001d791b90) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd5470, count: -12 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(ffff80001d7915e0,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f Xspllower() at Xspllower+0x19 free(ffff800000b0a000,7f,10000) at free+0x206 sys/kern/kern_malloc.c:439 ufs_readdir(ffff80001d791980) at ufs_readdir+0x399 sys/ufs/ufs/ufs_vnops.c:1509 VOP_READDIR(fffffd80575479d8,ffff80001d791a00,fffffd806c3bfa80,ffff80001d791a44) at VOP_READDIR+0xc6 sys/kern/vfs_vops.c:520 sys_getdents(ffff80001d75c770,ffff80001d791ac0,ffff80001d791b10) at sys_getdents+0x21b sys/kern/vfs_syscalls.c:3121 syscall(ffff80001d791b90) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd5470, count: -12