uvm_fault(0xfffffd80701be030, 0x4d, 0, 1) -> e kernel: page fault trap, code=0 Stopped at fdcopy+0x2df: movl 0x4c(%r15),%ebx ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xfffffd80701be030, 0x4d, 0, 1) -> e fdcopy(ffff800020eb23f8) at fdcopy+0x2df sys/kern/kern_descrip.c:1165 end trace frame: 0xffff800020ee5dc0, count: 0 ddb{0}> trace fdcopy(ffff800020eb23f8) at fdcopy+0x2df sys/kern/kern_descrip.c:1165 process_new(ffff800020e9e290,ffff800020eb23f8,1) at process_new+0x12c sys/kern/kern_fork.c:253 fork1(ffff800020e9f160,1,ffffffff812e4340,0,ffff800020ee5ed0,0) at fork1+0x313 sys/kern/kern_fork.c:377 syscall(ffff800020ee5f50) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ee5f50) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:568 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd05f0, count: -5 ddb{0}> show registers rdi 0x1 rsi 0x2 rbp 0xffff800020ee5d60 rbx 0xfffffd80783b43f0 rdx 0 rcx 0xfffffd80783b4180 rax 0xffff800000678000 r8 0xe10 r9 0 r10 0x688183533a3219d9 r11 0xeaa6b94196f86e0a r12 0x51 r13 0x51 r14 0xfffffd80783b4010 r15 0x1 rip 0xffffffff82336a1f fdcopy+0x2df cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800020ee5d10 ss 0x10 fdcopy+0x2df: movl 0x4c(%r15),%ebx ddb{0}> show proc PROC (syz-executor.0) pid=217697 stat=onproc flags process=2 proc=0 pri=17, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020e9e018,0xffffffff82889050 process=0xffff800020eb23f8 user=0xffff800020ee1000, vmspace=0xfffffd80701be030 estcpu=36, cpticks=1, pctcpu=0.4 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *22085 217697 36232 0 7 0x2 syz-executor.0 23330 253931 36232 0 2 0x482 syz-executor.1 17126 32659 1 0 3 0x100083 ttyin getty 87538 181223 0 0 3 0x14200 bored sosplice 36232 384384 88119 0 3 0x82 thrsleep syz-fuzzer 36232 497237 88119 0 2 0x4000482 syz-fuzzer 36232 474728 88119 0 2 0x4000482 syz-fuzzer 36232 243988 88119 0 3 0x4000082 thrsleep syz-fuzzer 36232 102578 88119 0 3 0x4000082 thrsleep syz-fuzzer 36232 62037 88119 0 3 0x4000082 thrsleep syz-fuzzer 36232 104556 88119 0 3 0x4000082 thrsleep syz-fuzzer 36232 433381 88119 0 7 0x4000002 syz-fuzzer 88119 62992 22558 0 3 0x10008a pause ksh 22558 447163 45774 0 3 0x92 select sshd 45774 264407 1 0 3 0x80 select sshd 33501 294056 65048 74 3 0x100092 bpf pflogd 65048 252431 1 0 3 0x80 netio pflogd 24355 183743 39356 73 3 0x100090 kqread syslogd 39356 467007 1 0 3 0x100082 netio syslogd 39178 184448 1 77 3 0x100090 poll dhclient 25323 412889 1 0 3 0x80 poll dhclient 25409 258886 0 0 3 0x14200 bored smr 7585 476490 0 0 3 0x14200 pgzero zerothread 94142 297918 0 0 3 0x14200 aiodoned aiodoned 82167 102368 0 0 3 0x14200 syncer update 2654 179872 0 0 3 0x14200 cleaner cleaner 28598 139949 0 0 3 0x14200 reaper reaper 60957 519898 0 0 3 0x14200 pgdaemon pagedaemon 50438 378720 0 0 3 0x14200 bored crynlk 42834 149485 0 0 3 0x14200 bored crypto 1320 140003 0 0 3 0x40014200 acpi0 acpi0 26692 55085 0 0 3 0x40014200 idle1 12192 491367 0 0 3 0x14200 bored softnet 79905 120863 0 0 3 0x14200 bored systqmp 94073 104825 0 0 3 0x14200 bored systq 30749 129147 0 0 3 0x40014200 bored softclock 8956 478021 0 0 3 0x40014200 idle0 1 47551 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 22085 (syz-executor.0) thread 0xffff800020e9f160 (217697) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9557 6457K 7775K 78643K 23051 0 pcb 13 8K 8K 78643K 683 0 rtable 99 12K 16K 78643K 1719 0 ifaddr 92 17K 18K 78643K 693 0 sysctl 3 1K 1K 78643K 3 0 counters 43 33K 34K 78643K 263 0 ioctlops 0 0K 4K 78643K 2211 0 iov 0 0K 28K 78643K 488 0 mount 1 1K 1K 78643K 1 0 vnodes 1231 77K 78K 78643K 5519 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 85 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1026 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 10800 0 sigio 0 0K 0K 78643K 67 0 proc 64 63K 95K 78643K 1128 0 subproc 32 2K 2K 78643K 178 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 735 0 in_multi 33 2K 2K 78643K 446 0 ether_multi 1 0K 0K 78643K 98 0 mrt 0 0K 0K 78643K 73 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 79 360K 360K 78643K 79 0 exec 0 0K 2K 78643K 839 0 pfkey data 0 0K 0K 78643K 2 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 348 771K 771K 78643K 26490 0 UVM aobj 131 4K 4K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 559 0 NDP 17 0K 0K 78643K 151 0 temp 151 3967K 4036K 78643K 44670 0 kqueue 4 5K 24K 78643K 664 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 21 0 15 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 96 482 0 480 1 0 1 1 0 8 0 rtentry 112 173 0 137 2 0 2 2 0 8 0 unpcb 120 3041 0 3014 8 6 2 2 0 8 1 syncache 272 96 0 96 12 12 0 1 0 8 0 tcpqe 32 46 0 46 7 7 0 1 0 8 0 tcpcb 592 2166 0 2153 29 26 3 6 0 8 1 inpcb 296 5565 0 5485 15 7 8 8 0 8 1 rttmr 72 25 0 25 5 4 1 1 0 8 1 nd6 48 34 0 28 1 0 1 1 0 8 0 pkpcb 40 125 0 125 7 7 0 1 0 8 0 kcovpl 48 10 0 8 1 0 1 1 0 8 0 ppxss 1128 15 0 15 2 2 0 1 0 8 0 pfstscr 40 5 0 5 1 1 0 1 0 8 0 pffrag 232 30 0 30 2 2 0 1 0 482 0 pffrnode 88 30 0 30 2 2 0 1 0 8 0 pffrent 40 1150 0 1150 3 3 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 121 0 121 2 2 0 1 0 8 0 pftag 88 7 0 5 1 0 1 1 0 8 0 pfqueue 264 19 0 18 1 0 1 1 0 8 0 pfstitem 24 11 0 9 1 0 1 1 0 8 0 pfstkey 112 31 0 29 1 0 1 1 0 8 0 pfstate 328 21 0 19 1 0 1 1 0 8 0 pfrule 1360 113 0 104 4 2 2 3 0 8 0 art_heap8 4096 9 0 8 3 2 1 3 0 8 0 art_heap4 256 725 0 543 13 1 12 12 0 8 0 art_table 32 734 0 551 2 0 2 2 0 8 0 art_node 16 172 0 142 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 12 1 0 1 1 0 8 0 semapl 112 1024 0 1014 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 15485 0 14070 90 1 89 89 0 8 0 ffsino 272 15485 0 14070 95 0 95 95 0 8 0 nchpl 144 28662 0 27071 60 0 60 60 0 8 0 uvmvnodes 72 11803 0 0 215 0 215 215 0 8 0 vnodes 208 11803 0 0 622 0 622 622 0 8 0 namei 1024 72876 0 72876 2 1 1 1 0 8 1 percpumem 16 142 0 110 1 0 1 1 0 8 0 vcpupl 1984 57 0 0 8 0 8 8 0 8 0 vmpool 560 100 0 43 5 0 5 5 0 8 0 pfiaddrpl 120 52 0 52 2 2 0 1 0 8 0 scsiplug 72 15 0 15 3 3 0 1 0 8 0 scxspl 200 86009 0 86009 15 14 1 7 0 8 1 plimitpl 152 521 0 513 1 0 1 1 0 8 0 sigapl 424 10994 0 10963 4 0 4 4 0 8 0 futexpl 56 86427 0 86427 2 1 1 1 0 8 1 knotepl 112 1439 0 1419 2 1 1 2 0 8 0 kqueuepl 152 5841 0 5831 1 0 1 1 0 8 0 pipepl 304 558 0 547 11 9 2 2 0 8 0 fdescpl 496 10979 0 10963 3 0 3 3 0 8 0 filepl 152 41945 0 41843 8 3 5 7 0 8 1 lockfpl 104 1578 0 1577 1 0 1 1 0 8 0 lockfspl 48 567 0 566 1 0 1 1 0 8 0 sessionpl 120 28 0 17 1 0 1 1 0 8 0 pgrppl 48 56 0 45 1 0 1 1 0 8 0 ucredpl 96 6202 0 6193 1 0 1 1 0 8 0 zombiepl 144 10963 0 10962 2 1 1 1 0 8 0 processpl 1008 10995 0 10962 5 0 5 5 0 8 0 procpl 632 24810 0 24770 6 2 4 5 0 8 0 srpgc 72 2 0 2 1 1 0 1 0 8 0 sosppl 144 204 0 204 10 10 0 1 0 8 0 sockpl 400 9242 0 9133 29 16 13 14 0 8 1 mcl64k 65536 35 0 0 4 1 3 3 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 20 0 0 3 1 2 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 13 0 0 1 0 1 1 0 8 0 mcl2k 2048 337 0 0 16 0 16 16 0 8 0 mtagpl 96 478 0 0 10 0 10 10 0 8 0 mbufpl 256 1217 0 0 64 1 63 63 0 8 0 bufpl 280 20192 0 13917 449 0 449 449 0 8 0 anonpl 16 840053 0 829592 127 67 60 60 0 124 15 amapchunkpl 152 46353 0 46078 64 49 15 23 0 158 3 amappl16 192 36714 0 36316 89 60 29 32 0 8 8 amappl15 184 508 0 505 1 0 1 1 0 8 0 amappl14 176 16 0 12 1 0 1 1 0 8 0 amappl13 168 1470 0 1468 1 0 1 1 0 8 0 amappl12 160 1258 0 1253 1 0 1 1 0 8 0 amappl11 152 2883 0 2868 1 0 1 1 0 8 0 amappl10 144 442 0 434 1 0 1 1 0 8 0 amappl9 136 4712 0 4711 1 0 1 1 0 8 0 amappl8 128 4954 0 4803 6 1 5 5 0 8 0 amappl7 120 772 0 763 1 0 1 1 0 8 0 amappl6 112 2980 0 2953 1 0 1 1 0 8 0 amappl5 104 10321 0 10309 1 0 1 1 0 8 0 amappl4 96 2727 0 2687 2 0 2 2 0 8 1 amappl3 88 303 0 297 1 0 1 1 0 8 0 amappl2 80 78035 0 77956 3 1 2 3 0 8 0 amappl1 72 294172 0 293738 24 14 10 19 0 8 0 amappl 80 25342 0 25229 3 0 3 3 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 64 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 11078 0 11006 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11078 0 11006 1 0 1 1 0 8 0 vmmpekpl 168 47833 0 47785 3 0 3 3 0 8 0 vmmpepl 168 1344271 0 1342547 177 80 97 97 0 357 10 vmsppl 368 11077 0 11006 7 0 7 7 0 8 0 pdppl 4096 22163 0 22069 13 0 13 13 0 8 0 pvpl 32 3753847 0 3742557 350 217 133 133 0 265 35 pmappl 232 11077 0 11006 5 0 5 5 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 364 0 40 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace fdcopy(ffff800020eb23f8) at fdcopy+0x2df sys/kern/kern_descrip.c:1165 process_new(ffff800020e9e290,ffff800020eb23f8,1) at process_new+0x12c sys/kern/kern_fork.c:253 fork1(ffff800020e9f160,1,ffffffff812e4340,0,ffff800020ee5ed0,0) at fork1+0x313 sys/kern/kern_fork.c:377 syscall(ffff800020ee5f50) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ee5f50) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:568 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd05f0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp