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: 0xffff80001d78b1d0, 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(ffff80001d78b280,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f mtx_enter(ffffffff828483f8) at mtx_enter+0x51 sys/kern/kern_lock.c:332 pool_get(ffffffff828483f8,9) at pool_get+0x8f sys/kern/subr_pool.c:578 falloc(ffff80001d6a9278,ffff80001d78b658,ffff80001d78b66c) at falloc+0x103 fnew sys/kern/kern_descrip.c:1051 [inline] falloc(ffff80001d6a9278,ffff80001d78b658,ffff80001d78b66c) at falloc+0x103 sys/kern/kern_descrip.c:1025 doopenat(ffff80001d6a9278,ffffff9c,7f7ffffe83d0,30000,0,ffff80001d78b730) at doopenat+0x133 sys/kern/vfs_syscalls.c:1112 syscall(ffff80001d78b7b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe7ed0, count: -11 ddb> show registers rdi 0xc rsi 0xc rbp 0xffff80001d78b170 rbx 0xffff80000017a000 rdx 0 rcx 0xffff8000001ab000 rax 0 r8 0x2 r9 0 r10 0 r11 0x93114dc1f79a2b73 r12 0xffff80000002ea00 r13 0xc r14 0xfffffd806bc22500 r15 0 rip 0xffffffff81b68bf1 vio_rxeof+0x191 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d78b0e0 ss 0x10 vio_rxeof+0x191: movzwl 0xa(%r15),%eax ddb> show proc PROC (syz-executor.0) pid=141140 stat=onproc flags process=2 proc=0 pri=56, usrpri=56, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6aa118,0xffff80001d6aa398 process=0xffff80001d6c55d0 user=0xffff80001d786000, vmspace=0xfffffd806bc09990 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 86944 106798 42537 0 2 0 syz-executor.1 86944 512912 42537 0 3 0x4000080 fsleep syz-executor.1 42537 133017 85144 0 3 0x82 nanosleep syz-executor.1 *35945 141140 85144 0 7 0x2 syz-executor.0 85144 112403 4812 0 3 0x82 thrsleep syz-fuzzer 85144 410221 4812 0 3 0x4000082 nanosleep syz-fuzzer 85144 15836 4812 0 2 0x4000002 syz-fuzzer 85144 12144 4812 0 3 0x4000082 thrsleep syz-fuzzer 85144 383393 4812 0 3 0x4000082 thrsleep syz-fuzzer 85144 388539 4812 0 3 0x4000082 thrsleep syz-fuzzer 85144 492841 4812 0 3 0x4000082 thrsleep syz-fuzzer 85144 416112 4812 0 3 0x4000082 thrsleep syz-fuzzer 85144 229532 4812 0 3 0x4000082 thrsleep syz-fuzzer 4812 227800 27776 0 3 0x10008a pause ksh 27776 519333 54943 0 3 0x92 select sshd 82039 467819 1 0 3 0x100083 ttyin getty 54943 504179 1 0 3 0x80 select sshd 19146 251864 75485 73 3 0x100090 kqread syslogd 75485 371449 1 0 3 0x100082 netio syslogd 2549 422472 1 77 3 0x100090 poll dhclient 92354 183607 1 0 3 0x80 poll dhclient 88485 411677 0 0 3 0x14200 bored smr 92726 442936 0 0 2 0x14200 zerothread 45499 390764 0 0 3 0x14200 aiodoned aiodoned 32776 105068 0 0 3 0x14200 syncer update 50906 226352 0 0 3 0x14200 cleaner cleaner 36330 328285 0 0 3 0x14200 reaper reaper 64872 411145 0 0 3 0x14200 pgdaemon pagedaemon 24458 453577 0 0 3 0x14200 bored crynlk 68071 115240 0 0 3 0x14200 bored crypto 93184 473277 0 0 3 0x40014200 acpi0 acpi0 22046 167562 0 0 3 0x14200 bored softnet 21304 431626 0 0 3 0x14200 bored systqmp 29422 399514 0 0 3 0x14200 bored systq 89021 186871 0 0 3 0x40014200 bored softclock 96778 337318 0 0 3 0x40014200 idle0 1 3897 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 9470 6394K 6466K 78643K 10624 0 pcb 13 8K 8K 78643K 37 0 rtable 108 3K 4K 78643K 211 0 ifaddr 48 11K 11K 78643K 67 0 counters 21 16K 16K 78643K 24 0 ioctlops 0 0K 4K 78643K 27 0 iov 0 0K 12K 78643K 72 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 77K 77K 78643K 1243 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 29 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 118 0 sigio 0 0K 0K 78643K 2 0 proc 48 38K 54K 78643K 374 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 14 0 in_multi 33 2K 2K 78643K 42 0 ether_multi 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 181 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 126 23K 39K 78643K 1123 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 12 0 NDP 7 0K 0K 78643K 14 0 temp 79 3850K 3914K 78643K 2661 0 kqueue 3 4K 4K 78643K 3 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 21 0 19 1 0 1 1 0 8 0 rtentry 112 45 0 1 2 0 2 2 0 8 0 unpcb 120 53 0 45 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 433 0 433 1 0 1 1 0 8 1 tcpcb 544 36 0 32 1 0 1 1 0 8 0 ipq 40 2 0 2 1 0 1 1 0 8 1 ipqe 40 4 0 4 1 0 1 1 0 8 1 inpcb 296 189 0 182 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 ppxss 1136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 4 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 24 0 14 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 1535 0 135 88 0 88 88 0 8 0 ffsino 240 1535 0 135 83 0 83 83 0 8 0 nchpl 144 1914 0 309 60 0 60 60 0 8 0 uvmvnodes 72 1590 0 0 29 0 29 29 0 8 0 vnodes 208 1590 0 0 84 0 84 84 0 8 0 namei 1024 4759 0 4759 2 1 1 1 0 8 1 scxspl 192 5641 0 5641 1 0 1 1 0 8 1 plimitpl 152 21 0 13 1 0 1 1 0 8 0 sigapl 424 304 0 276 4 0 4 4 0 8 0 futexpl 56 1804 0 1803 1 0 1 1 0 8 0 knotepl 112 61 0 42 1 0 1 1 0 8 0 kqueuepl 144 14 0 12 1 0 1 1 0 8 0 pipepl 272 80 0 70 1 0 1 1 0 8 0 fdescpl 432 290 0 276 2 0 2 2 0 8 0 filepl 120 1521 0 1426 4 0 4 4 0 8 1 lockfpl 104 20 0 19 1 0 1 1 0 8 0 lockfspl 48 8 0 7 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 96 125 0 118 1 0 1 1 0 8 0 zombiepl 144 276 0 276 2 1 1 1 0 8 1 processpl 928 304 0 276 4 0 4 4 0 8 0 procpl 624 416 0 379 4 0 4 4 0 8 0 sockpl 400 264 0 247 3 0 3 3 0 8 1 mcl64k 65536 13 0 13 1 0 1 1 0 8 1 mcl16k 16384 2 0 2 1 0 1 1 0 8 1 mcl12k 12288 7 0 7 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 3 0 3 1 0 1 1 0 8 1 mcl4k 4096 14 0 14 2 1 1 1 0 8 1 mcl2k 2048 92182 0 92118 18 2 16 17 0 8 7 mtagpl 96 7 0 2 2 1 1 1 0 8 0 mbufpl 256 145763 0 145645 11 2 9 10 0 8 0 bufpl 280 3666 0 125 253 0 253 253 0 8 0 anonpl 16 44748 0 27241 73 2 71 71 0 107 0 amapchunkpl 152 1899 0 1765 19 0 19 19 0 158 12 amappl16 192 1455 0 492 49 0 49 49 0 8 0 amappl15 184 10 0 8 2 1 1 1 0 8 0 amappl14 176 26 0 20 1 0 1 1 0 8 0 amappl13 168 73 0 68 1 0 1 1 0 8 0 amappl12 160 14 0 11 1 0 1 1 0 8 0 amappl11 152 46 0 37 1 0 1 1 0 8 0 amappl10 144 21 0 15 1 0 1 1 0 8 0 amappl9 136 388 0 385 1 0 1 1 0 8 0 amappl8 128 371 0 325 2 0 2 2 0 8 0 amappl7 120 105 0 93 1 0 1 1 0 8 0 amappl6 112 27 0 20 1 0 1 1 0 8 0 amappl5 104 274 0 263 1 0 1 1 0 8 0 amappl4 96 475 0 444 1 0 1 1 0 8 0 amappl3 88 109 0 104 1 0 1 1 0 8 0 amappl2 80 1494 0 1430 2 0 2 2 0 8 0 amappl1 72 15366 0 14957 22 12 10 17 0 8 0 amappl 80 644 0 602 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 24 290 0 276 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 290 0 276 1 0 1 1 0 8 0 vmmpekpl 168 6039 0 6012 2 0 2 2 0 8 0 vmmpepl 168 43022 0 40955 123 4 119 119 0 357 28 vmsppl 272 289 0 276 2 0 2 2 0 8 1 pdppl 4096 586 0 552 6 0 6 6 0 8 1 pvpl 32 147611 0 127135 167 0 167 167 0 265 1 pmappl 200 289 0 276 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 242 0 8 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(ffff80001d78b280,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f mtx_enter(ffffffff828483f8) at mtx_enter+0x51 sys/kern/kern_lock.c:332 pool_get(ffffffff828483f8,9) at pool_get+0x8f sys/kern/subr_pool.c:578 falloc(ffff80001d6a9278,ffff80001d78b658,ffff80001d78b66c) at falloc+0x103 fnew sys/kern/kern_descrip.c:1051 [inline] falloc(ffff80001d6a9278,ffff80001d78b658,ffff80001d78b66c) at falloc+0x103 sys/kern/kern_descrip.c:1025 doopenat(ffff80001d6a9278,ffffff9c,7f7ffffe83d0,30000,0,ffff80001d78b730) at doopenat+0x133 sys/kern/vfs_syscalls.c:1112 syscall(ffff80001d78b7b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe7ed0, count: -11 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(ffff80001d78b280,ffff800000655380) at intr_handler+0x4d sys/arch/amd64/amd64/intr.c:537 Xintr_ioapic_edge19_untramp() at Xintr_ioapic_edge19_untramp+0x19f mtx_enter(ffffffff828483f8) at mtx_enter+0x51 sys/kern/kern_lock.c:332 pool_get(ffffffff828483f8,9) at pool_get+0x8f sys/kern/subr_pool.c:578 falloc(ffff80001d6a9278,ffff80001d78b658,ffff80001d78b66c) at falloc+0x103 fnew sys/kern/kern_descrip.c:1051 [inline] falloc(ffff80001d6a9278,ffff80001d78b658,ffff80001d78b66c) at falloc+0x103 sys/kern/kern_descrip.c:1025 doopenat(ffff80001d6a9278,ffffff9c,7f7ffffe83d0,30000,0,ffff80001d78b730) at doopenat+0x133 sys/kern/vfs_syscalls.c:1112 syscall(ffff80001d78b7b0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe7ed0, count: -11