login: uvm_fault(0xfffffd805eda4b68, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff825becf0 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff8000393ef4f0 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff825becf0 Starting stack trace... panic(ffffffff8333bda1) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000393ef440) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015b0000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtioctl(11e5f,80044403,ffff8000393ef780,81,ffff8000ffffc008) at dtioctl+0x536 sys/dev/dt/dt_dev.c:318 VOP_IOCTL(fffffd805e03e478,80044403,ffff8000393ef780,81,fffffd80097fb3a8,ffff8000ffffc008) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd807b934998,80044403,ffff8000393ef780,ffff8000ffffc008) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffffc008,ffff8000393ef960,ffff8000393ef8b0) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff8000393ef960) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000393ef960) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaba02a21740, count: 247 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 304453632 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *150046 69595 0 0 0 1 syz-executor 337636 4774 0 0 0x4000000 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x734c684bb780, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd805eda4b68, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x734c684bb780, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c47d8b0 rbx 0 rdx 0 rcx 0xffff80003c01af88 rax 0x3a r8 0xffff80003c47d7e0 r9 0x1 r10 0x25f9b3bb529bf52a r11 0xf43bf8561385cf66 r12 0 r13 0 r14 0xffff80003c01af88 r15 0 rip 0xffffffff830a53ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c47d830 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=150046 pid=69595 tcnt=3 stat=onproc flags process=0 proc=0 runpri=81, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c01bc58,0xffff80003c01b748 process=0xffff80003c01e208 user=0xffff80003c478000, vmspace=0xfffffd805eda4b68 estcpu=31, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 33849 494867 18223 0 2 0x40 syz-executor 35764 176658 49813 0 3 0x80 fsleep syz-executor 35764 234338 49813 0 2 0x4000000 syz-executor 32464 164124 71248 0 2 0 syz-executor 32464 306497 71248 0 3 0x4000080 fsleep syz-executor *69595 150046 10577 0 7 0 syz-executor 69595 435655 10577 0 3 0x4000080 fsleep syz-executor 69595 324830 10577 0 3 0x4000000 sbar syz-executor 4774 56660 7719 0 2 0 syz-executor 4774 337636 7719 0 7 0x4000000 syz-executor 4774 212067 7719 0 3 0x4000080 fsleep syz-executor 4774 177794 7719 0 3 0x4000080 fsleep syz-executor 18223 277526 66959 0 3 0x82 ppwait syz-executor 95751 163447 83748 0 3 0x80 fsleep syz-executor 95751 443140 83748 0 3 0x4000080 sbwait syz-executor 58516 29537 81924 0 3 0x80 fsleep syz-executor 58516 517078 81924 0 3 0x4000080 ttyin syz-executor 43598 83587 59276 0 3 0x80 fsleep syz-executor 43598 430783 59276 0 3 0x4000080 ttyin syz-executor 43598 163423 59276 0 3 0x4000080 fsleep syz-executor 43598 358080 59276 0 3 0x4000080 fsleep syz-executor 98380 127320 1 0 3 0x100083 ttyin getty 47899 2230 0 0 3 0x14200 acct acct 7719 415889 66959 0 3 0x82 nanoslp syz-executor 91311 97687 0 0 3 0x14200 bored sosplice 83748 99184 66959 0 3 0x82 nanoslp syz-executor 81924 440880 66959 0 3 0x82 nanoslp syz-executor 71248 124766 66959 0 3 0x82 nanoslp syz-executor 49813 449777 66959 0 3 0x82 nanoslp syz-executor 10577 186177 66959 0 3 0x82 nanoslp syz-executor 59276 103175 66959 0 3 0x82 nanoslp syz-executor 66959 449415 65970 0 3 0x82 kqread syz-executor 65970 164526 57176 0 3 0x10008a sigsusp ksh 57176 308268 5376 0 3 0x98 kqread sshd-session 5376 446304 84587 0 3 0x92 kqread sshd-session 84587 353 1 0 3 0x88 kqread sshd 10037 400430 88666 74 3 0x1100092 bpf pflogd 88666 42071 1 0 3 0x80 sbwait pflogd 75824 118691 82634 73 3 0x1100090 kqread syslogd 82634 425901 1 0 3 0x100082 sbwait syslogd 89734 355150 1 0 3 0x100080 kqread resolvd 51484 392514 43023 77 3 0x100092 kqread dhcpleased 45065 257584 43023 77 3 0x100092 kqread dhcpleased 43023 414594 1 0 3 0x80 kqread dhcpleased 43789 134345 0 0 3 0x14200 bored smr 45706 32208 0 0 2 0x14200 zerothread 93811 292517 0 0 3 0x14200 aiodoned aiodoned 76573 270750 0 0 3 0x14200 syncer update 54320 365867 0 0 3 0x14200 cleaner cleaner 8044 31490 0 0 3 0x14200 reaper reaper 15759 381456 0 0 3 0x14200 pgdaemon pagedaemon 32879 285848 0 0 3 0x14200 bored viomb 10207 215912 0 0 3 0x40014200 acpi0 acpi0 94955 445698 0 0 3 0x40014200 idle1 63043 59074 0 0 3 0x14200 bored softnet3 76375 14673 0 0 3 0x14200 bored softnet2 60904 306479 0 0 3 0x14200 bored softnet1 82818 83194 0 0 2 0x14200 softnet0 85997 99352 0 0 2 0x40014200 systqmp 70254 27184 0 0 3 0x14200 bored systq 2017 383286 0 0 3 0x14200 tmoslp softclockmp 48092 396928 0 0 3 0x40014200 tmoslp softclock 60987 61056 0 0 3 0x40014200 idle0 1 395506 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 69595 (syz-executor) thread 0xffff8000ffffc008 (324830) exclusive rwlock dtlk r = 0 (0xffffffff838593a8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 dt_ioctl_record_stop+0x68 sys/dev/dt/dt_dev.c:-1 #3 dtioctl+0x536 sys/dev/dt/dt_dev.c:318 #4 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #5 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #6 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #7 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83931b90) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 vn_ioctl+0x4d sys/kern/vfs_vnops.c:514 #2 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #4 Xsyscall+0x128 Process 95751 (syz-executor) thread 0xffff80002a2ac540 (443140) exclusive rwlock sbufrcv r = 0 (0xffff800010fde0f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 sblock+0xb7 sys/kern/uipc_socket2.c:536 #3 soreceive+0x28e sys/kern/uipc_socket.c:881 #4 recvit+0x40a sys/kern/uipc_syscalls.c:1072 #5 sys_recvmmsg+0x3d3 sys/kern/uipc_syscalls.c:963 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10221 11059K 12332K 166960K 13302 0 pcb 19 15K 17K 166960K 298 0 rtable 237 10K 11K 166960K 940 0 pf 36 17K 22K 166960K 156 0 ifaddr 41 7K 8K 166960K 140 0 ifgroup 59 2K 2K 166960K 192 0 sysctl 4 1K 9K 166960K 15 0 counters 70 37K 37K 166960K 174 0 ioctlops 0 0K 4K 166960K 1702 0 iov 2 5K 28K 166960K 56 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1529 96K 97K 166960K 2755 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 21 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 60 0 dirhash 12 2K 3K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 1278 0 sigio 0 0K 0K 166960K 13 0 proc 72 91K 127K 166960K 1107 0 subproc 72 4K 4K 166960K 235 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 164 0 in_multi 88 6K 7K 166960K 303 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 796 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 235 167K 181K 166960K 12024 0 UVM aobj 29 4K 4K 166960K 30 0 pinsyscall 43 86K 102K 166960K 2814 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 48 0 NDP 13 0K 2K 166960K 102 0 temp 56 8691K 8818K 166960K 40147 0 kqueue 13 20K 30K 166960K 171 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 126 0 123 1 0 1 1 0 8 0 rtentry 176 308 0 206 6 0 6 6 0 8 0 unpcb 144 592 0 572 6 5 1 4 0 8 0 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 275 0 270 11 7 4 4 0 8 3 arp 128 53 0 36 1 0 1 1 0 8 0 inpcb 328 1140 0 1129 17 13 4 9 0 8 2 nd6 144 77 0 55 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 kcovpl 48 26 0 18 1 0 1 1 0 8 0 ppxss 1192 28 0 28 4 3 1 1 0 8 1 pffrag 232 6 0 2 1 0 1 1 0 482 0 pffrnode 88 5 0 2 1 0 1 1 0 8 0 pffrent 40 8 0 4 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 63 0 33 1 0 1 1 0 8 0 pfstkey 128 63 0 33 2 0 2 2 0 8 0 pfstate 384 63 0 33 5 1 4 5 0 8 0 pfrule 1344 28 0 23 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1253 0 839 32 3 29 29 0 8 0 art_table 32 1255 0 839 4 0 4 4 0 8 0 art_node 16 303 0 211 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 5 1 0 1 1 0 8 0 semapl 112 58 0 48 1 0 1 1 0 8 0 shmpl 112 27 0 1 1 0 1 1 0 8 0 dirhash 1024 34 0 17 3 0 3 3 0 8 0 dino2pl 256 3447 0 1912 97 0 97 97 0 8 0 ffsino 288 3447 0 1912 110 0 110 110 0 8 0 nchpl 144 4885 0 3140 65 0 65 65 0 8 0 rtmask 32 7 0 7 3 2 1 1 0 8 1 uvmvnodes 80 4370 0 0 90 0 90 90 0 8 0 vnodes 216 4370 0 0 243 0 243 243 0 8 0 namei 1024 17415 0 17415 2 1 1 2 0 8 1 percpumem 16 102 0 52 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 110 0 78 3 0 3 3 0 8 0 scsiplug 72 4 0 4 3 3 0 1 0 8 0 scxspl 216 22585 0 22585 12 10 2 8 1 8 2 plimitpl 152 272 0 255 1 0 1 1 0 8 0 sigapl 424 1546 0 1494 7 1 6 7 0 8 0 knotepl 120 809 0 0 25 0 25 25 0 8 0 kqueuepl 224 407 0 397 5 4 1 5 0 8 0 pipepl 336 224 0 197 3 0 3 3 0 8 0 fdescpl 520 1526 0 1494 3 0 3 3 0 8 0 filepl 160 8480 0 8260 24 13 11 18 0 8 1 lockfpl 104 227 0 225 1 0 1 1 0 8 0 lockfspl 48 101 0 99 1 0 1 1 0 8 0 sessionpl 144 43 0 34 1 0 1 1 0 8 0 pgrppl 48 78 0 61 1 0 1 1 0 8 0 ucredpl 104 1816 0 1802 1 0 1 1 0 8 0 zombiepl 144 1494 0 1494 1 0 1 1 0 8 1 processpl 1240 1546 0 1494 5 0 5 5 0 8 0 procpl 656 2969 0 2905 6 0 6 6 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 3 0 3 2 2 0 1 0 8 0 sockpl 728 1917 0 1883 25 19 6 13 0 8 2 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 134 0 0 17 0 17 17 0 8 0 mcl2k 2048 31 0 0 4 0 4 4 0 8 0 mtagpl 96 84 0 0 3 0 3 3 0 8 0 mbufpl 256 304 0 0 19 0 19 19 0 8 0 bufpl 280 8386 0 2244 440 0 440 440 0 8 0 anonpl 32 9633 0 0 78 0 78 78 0 246 0 amapchunkpl 152 37810 0 37333 33 12 21 28 0 158 2 amappl16 200 3147 0 3116 34 21 13 15 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 150 0 138 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2437 0 2406 3 1 2 2 0 8 0 amappl11 160 49 0 34 1 0 1 1 0 8 0 amappl10 152 19 0 18 1 0 1 1 0 8 0 amappl9 144 272 0 271 2 1 1 1 0 8 0 amappl8 136 19 0 17 1 0 1 1 0 8 0 amappl7 128 144 0 131 1 0 1 1 0 8 0 amappl6 120 341 0 337 1 0 1 1 0 8 0 amappl5 112 187 0 178 1 0 1 1 0 8 0 amappl4 104 369 0 349 1 0 1 1 0 8 0 amappl3 96 7713 0 7602 4 0 4 4 0 8 0 amappl2 88 880 0 817 2 0 2 2 0 8 0 amappl1 80 14278 0 13670 15 1 14 15 0 8 0 amappl 88 10907 0 10745 5 1 4 5 0 92 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 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 72 29 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1526 0 1494 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1526 0 1494 1 0 1 1 0 8 0 vmmpekpl 168 12949 0 12902 3 0 3 3 0 8 0 vmmpepl 168 98808 0 96769 111 12 99 100 0 357 2 vmsppl 480 1525 0 1494 6 1 5 5 0 8 0 rwobjpl 72 30521 0 25183 101 1 100 100 0 8 0 pdppl 4096 3059 0 2988 131 58 73 83 0 8 2 pvpl 32 17530 0 0 142 0 142 142 0 265 0 pmappl 256 1525 0 1494 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 444 0 75 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0