uvm_fault(0xfffffd807b13e210, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff817c3a70 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff80003c504e20 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff817c3a70 Starting stack trace... panic(ffffffff83345cb1) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c504d70) at kerntrap+0x29b sys/arch/amd64/amd64/trap.c:327 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001561000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:580 dtclose(11e5f,41,2000,ffff80002a296540) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,41,2000,ffff80002a296540) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c504f20) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f045da0,41,fffffd80097fb618,ffff80002a296540) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd807b132908,ffff80002a296540) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd807b132908,ffff80002a296540) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd807b132908,ffff80002a296540) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd807b132908,ffff80002a296540) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff80002a296540) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff80002a296540,0,0,1) at exit1+0x59c sys/kern/kern_exit.c:215 sys_exit(ffff80002a296540,ffff80003c505290,ffff80003c5051e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c505290) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c505290) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x708629f0b050, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 49 0 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *472944 58151 0 0 0 1 syz-executor 102432 89858 0 0x14000 0x40000200 0 softclock savectx() at savectx+0xae end of kernel end trace frame: 0x72a3451624c0, 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(0xfffffd807b13e210, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x72a3451624c0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c437460 rbx 0 rdx 0 rcx 0xffff80002a296f80 rax 0x32 r8 0xffff80003c437390 r9 0x2080713 __kernel_phys_base+0x1080713 r10 0x670284461a7b26d8 r11 0xfa4308c2312c5e12 r12 0 r13 0 r14 0xffff80002a296f80 r15 0 rip 0xffffffff8193a3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c4373e0 ss 0 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=472944 pid=58151 tcnt=3 stat=onproc flags process=0 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2962b0,0xffff80002a2bacf8 process=0xffff80003c41ebb8 user=0xffff80003c432000, vmspace=0xfffffd807b13eb70 estcpu=36, cpticks=1, pctcpu=0.0, user=1, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 50531 352024 39702 0 2 0 syz-executor *58151 472944 10652 0 7 0 syz-executor 58151 268927 10652 0 2 0x4000000 syz-executor 58151 362110 10652 0 2 0x4000000 syz-executor 94914 51726 2261 0 2 0 syz-executor 94914 473883 2261 0 3 0x4000080 sbwait syz-executor 94327 333603 63783 0 2 0xc80 syz-executor 94327 178889 63783 0 3 0x4000080 sbwait syz-executor 94327 326817 63783 0 3 0x4000080 netcon syz-executor 62504 271764 38619 0 2 0xc82 syz-executor 39702 378006 38619 0 2 0xc82 syz-executor 65399 342896 1 0 3 0x80 nanoslp init 63783 30279 38619 0 2 0xc82 syz-executor 66814 163867 38619 0 2 0x2 syz-executor 91729 208189 0 0 3 0x14280 nfsidl nfsio 81139 419888 0 0 3 0x14280 nfsidl nfsio 52788 485601 0 0 3 0x14280 nfsidl nfsio 84093 487981 0 0 3 0x14280 nfsidl nfsio 66492 444542 0 0 3 0x14280 nfsidl nfsio 90655 122708 0 0 3 0x14280 nfsidl nfsio 50130 340664 0 0 3 0x14280 nfsidl nfsio 82854 215267 0 0 3 0x14280 nfsidl nfsio 65541 88888 0 0 3 0x14280 nfsidl nfsio 20002 489363 0 0 3 0x14280 nfsidl nfsio 2466 426440 0 0 3 0x14280 nfsidl nfsio 96515 383853 0 0 3 0x14280 nfsidl nfsio 80642 254449 0 0 3 0x14280 nfsidl nfsio 75720 103095 0 0 3 0x14280 nfsidl nfsio 52039 202105 0 0 3 0x14280 nfsidl nfsio 47082 515937 0 0 3 0x14280 nfsidl nfsio 8574 75097 0 0 3 0x14280 nfsidl nfsio 22771 121104 0 0 3 0x14280 nfsidl nfsio 49396 104753 0 0 3 0x14280 nfsidl nfsio 38507 60589 0 0 3 0x14280 nfsidl nfsio 9217 398120 0 0 3 0x14200 bored sosplice 87752 232940 38619 0 2 0xc82 syz-executor 10652 247184 38619 0 2 0xc82 syz-executor 26828 439246 38619 0 2 0x2 syz-executor 2261 168646 38619 0 2 0xc82 syz-executor 38619 114095 78776 0 3 0x82 kqread syz-executor 78776 395491 76474 0 3 0x10008a sigsusp ksh 76474 341536 51958 0 3 0x98 kqread sshd-session 51958 287799 14573 0 3 0x92 kqread sshd-session 14573 332513 1 0 3 0x88 kqread sshd 32360 26019 46472 74 3 0x1100092 bpf pflogd 46472 295825 1 0 3 0x80 sbwait pflogd 49559 285796 6850 73 2 0x1100010 syslogd 6850 259361 1 0 3 0x100082 sbwait syslogd 26682 383278 1 0 3 0x100080 kqread resolvd 76870 170259 82729 77 3 0x100092 kqread dhcpleased 49339 468977 82729 77 3 0x100092 kqread dhcpleased 82729 522917 1 0 3 0x80 kqread dhcpleased 65627 295391 0 0 2 0x14200 smr 50768 60684 0 0 2 0x14200 zerothread 17201 207331 0 0 3 0x14200 aiodoned aiodoned 77423 433663 0 0 3 0x14200 syncer update 24612 173053 0 0 3 0x14200 cleaner cleaner 47162 507946 0 0 3 0x14200 reaper reaper 91286 113681 0 0 3 0x14200 pgdaemon pagedaemon 78516 384914 0 0 3 0x14200 bored viomb 87662 258966 0 0 3 0x40014200 acpi0 acpi0 54893 74444 0 0 3 0x40014200 idle1 84674 12465 0 0 3 0x14200 bored softnet3 12848 16286 0 0 3 0x14200 bored softnet2 31448 146606 0 0 3 0x14200 bored softnet1 38445 125458 0 0 2 0x14200 softnet0 5385 362604 0 0 2 0x14200 systqmp 16258 51780 0 0 3 0x14200 bored systq 61590 469931 0 0 2 0x14200 softclockmp 89858 102432 0 0 7 0x40014200 softclock 16211 423911 0 0 3 0x40014200 idle0 1 503535 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 94327 (syz-executor) thread 0xffff80003c452f98 (178889) exclusive rwlock sbufrcv r = 0 (0xffff800001501228) #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 Process 49559 (syslogd) thread 0xffff8000ffff3c40 (285796) exclusive rrwlock inode r = 0 (0xfffffd806e5a2530) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_fsync+0x152 sys/kern/vfs_syscalls.c:2936 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10270 11163K 11729K 166960K 15117 0 pcb 17 15K 30K 166960K 437 0 rtable 163 7K 8K 166960K 714 0 pf 42 19K 67487K 166960K 212 0 ifaddr 38 6K 8K 166960K 116 0 ifgroup 59 2K 2K 166960K 182 0 sysctl 4 1K 9K 166960K 20 0 counters 72 37K 38K 166960K 168 0 ioctlops 0 0K 4K 166960K 1872 0 iov 2 6K 36K 166960K 118 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1488 94K 94K 166960K 3679 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 16K 20K 166960K 33 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 155 0 dirhash 15 2K 3K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 2093 0 sigio 1 0K 0K 166960K 48 0 proc 63 79K 140K 166960K 876 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 264 0 in_multi 68 4K 7K 166960K 233 0 ether_multi 1 0K 0K 166960K 21 0 mrt 1 0K 0K 166960K 19 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 674 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 230 168K 186K 166960K 20556 0 UVM aobj 66 3K 3K 166960K 68 0 pinsyscall 40 80K 99K 166960K 3290 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 126 0 NDP 14 0K 2K 166960K 71 0 temp 79 8696K 8941K 166960K 91174 0 kqueue 13 20K 32K 166960K 350 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 120 202 0 199 2 1 1 2 0 8 0 rtentry 176 231 0 164 6 0 6 6 0 8 0 unpcb 144 1792 0 1769 11 9 2 6 0 8 1 syncache 336 9 0 9 2 2 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 668 0 662 15 13 2 7 0 8 1 arp 128 39 0 25 1 0 1 1 0 8 0 inpcb 328 1912 0 1903 18 13 5 8 0 8 4 nd6 144 47 0 29 2 0 2 2 0 8 0 pkpcb 40 16 0 16 3 3 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 28 0 26 2 1 1 1 0 8 0 pppxif 1504 9 0 9 3 3 0 1 0 8 0 pffrag 232 18 0 10 1 0 1 1 0 482 0 pffrnode 88 18 0 10 1 0 1 1 0 8 0 pffrent 40 30 0 22 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 pfstitem 24 141 0 57 1 0 1 1 0 8 0 pfstkey 128 142 0 58 3 0 3 3 0 8 0 pfstate 384 141 0 58 9 0 9 9 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 rttmr 136 8 0 8 4 3 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 985 0 679 29 8 21 29 0 8 0 art_table 32 988 0 679 4 0 4 4 0 8 0 art_node 16 221 0 164 1 0 1 1 0 8 0 sysvmsgpl 40 23 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 151 0 141 1 0 1 1 0 8 0 shmpl 112 65 0 2 2 0 2 2 0 8 0 dirhash 1024 37 0 18 3 0 3 3 0 8 0 dino2pl 256 5206 0 3691 96 0 96 96 0 8 0 ffsino 288 5206 0 3691 109 0 109 109 0 8 0 nchpl 144 8187 0 6487 64 0 64 64 0 8 0 rtmask 32 3 0 3 2 1 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 29183 0 29183 1 0 1 1 0 8 1 percpumem 16 99 0 48 1 0 1 1 0 8 0 kstatmem 264 98 0 66 4 1 3 3 0 8 0 scsiplug 72 10 0 10 3 3 0 1 0 8 0 scxspl 216 31333 0 31333 12 10 2 8 1 8 2 plimitpl 152 559 0 543 1 0 1 1 0 8 0 sigapl 424 2385 0 2316 10 1 9 9 0 8 0 knotepl 120 655 0 0 20 0 20 20 0 8 0 kqueuepl 224 829 0 820 11 9 2 5 0 8 1 pipepl 336 488 0 460 8 5 3 8 0 8 0 fdescpl 520 2341 0 2311 3 0 3 3 0 8 0 filepl 160 16678 0 16450 29 17 12 19 0 8 1 lockfpl 104 854 0 852 1 0 1 1 0 8 0 lockfspl 48 349 0 347 1 0 1 1 0 8 0 sessionpl 144 31 0 23 1 0 1 1 0 8 0 pgrppl 48 67 0 50 1 0 1 1 0 8 0 ucredpl 104 2965 0 2952 1 0 1 1 0 8 0 zombiepl 144 2318 0 2316 1 0 1 1 0 8 0 processpl 1240 2385 0 2316 6 0 6 6 0 8 0 procpl 656 5609 0 5535 8 0 8 8 0 8 0 srpgc 96 18 0 18 2 2 0 1 0 8 0 sosppl 168 8 0 8 5 5 0 1 0 8 0 sockpl 728 4033 0 3997 35 28 7 16 0 8 3 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 44 0 0 6 0 6 6 0 8 0 mtagpl 96 98 0 0 3 0 3 3 0 8 0 mbufpl 256 1219 0 0 76 0 76 76 0 8 0 bufpl 280 9387 0 3244 439 0 439 439 0 8 0 anonpl 32 11990 0 0 97 0 97 97 0 246 0 amapchunkpl 152 76490 0 75969 49 20 29 38 0 158 3 amappl16 200 5407 0 5369 47 34 13 27 0 8 7 amappl15 192 14 0 14 2 2 0 1 0 8 0 amappl14 184 132 0 120 1 0 1 1 0 8 0 amappl13 176 10 0 10 3 3 0 1 0 8 0 amappl12 168 3086 0 3058 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 4 0 3 2 1 1 1 0 8 0 amappl9 144 242 0 241 2 1 1 1 0 8 0 amappl8 136 44 0 41 1 0 1 1 0 8 0 amappl7 128 125 0 114 1 0 1 1 0 8 0 amappl6 120 224 0 220 1 0 1 1 0 8 0 amappl5 112 139 0 128 1 0 1 1 0 8 0 amappl4 104 356 0 336 1 0 1 1 0 8 0 amappl3 96 14140 0 14041 5 1 4 4 0 8 0 amappl2 88 741 0 679 2 0 2 2 0 8 0 amappl1 80 17049 0 16474 15 0 15 15 0 8 0 amappl 88 19419 0 19259 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 67 0 2 2 0 2 2 0 8 0 uaddrrnd 24 2341 0 2311 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2341 0 2311 1 0 1 1 0 8 0 vmmpekpl 168 20448 0 20389 3 0 3 3 0 8 0 vmmpepl 168 148149 0 146229 117 15 102 110 0 357 5 vmsppl 480 2340 0 2311 7 2 5 5 0 8 0 rwobjpl 72 43080 0 36187 131 1 130 131 0 8 3 pdppl 4096 4689 0 4622 119 48 71 79 0 8 4 pvpl 32 21419 0 0 174 1 173 173 0 265 0 pmappl 256 2340 0 2311 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 494 0 80 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0