uvm_fault(0xfffffd806c2213e8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff8148c3a8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff800032bf3130 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff8148c3a8 Starting stack trace... panic(ffffffff833b9545) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff800032bf3080) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800000afa000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(21e5f,81,2000,ffff8000fffe7cb0) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000fffe7cb0) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff800032bf3230) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8068bbe298,81,fffffd80097fb478,ffff8000fffe7cb0) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd8069b42240,ffff8000fffe7cb0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd8069b42240,ffff8000fffe7cb0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd8069b42240,ffff8000fffe7cb0) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd8069b42240,ffff8000fffe7cb0) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffe7cb0) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffe7cb0,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffe7cb0,ffff800032bf35a0,ffff800032bf34f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800032bf35a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800032bf35a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ddffdb9c100, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 74 -2145058816 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 295131 2210 0 0 0 0 syz-executor *142088 58080 0 0x4000000 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7e247e249480, 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(0xfffffd806c2213e8, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7e247e249480, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c440f50 rbx 0 rdx 0 rcx 0xffff800032be4020 rax 0x3c r8 0xffff80003c440e80 r9 0x1 r10 0xbce130294eb647c2 r11 0x3fff56870bf1ad30 r12 0 r13 0 r14 0xffff800032be4020 r15 0 rip 0xffffffff81cdd3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c440ed0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=142088 pid=58080 tcnt=3 stat=onproc flags process=4000000 proc=0 runpri=80, usrpri=80, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffe6028,0xffff800032be4a90 process=0xffff8000fffe89c0 user=0xffff80003c43b000, vmspace=0xfffffd806c221018 estcpu=30, cpticks=107, pctcpu=1.5, user=1, sys=1, intr=105 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 2210 295131 44708 0 7 0 syz-executor 2210 107403 44708 0 3 0x4000080 fifor syz-executor 28928 263736 95124 0 2 0 syz-executor 28928 157017 95124 0 2 0x4000000 syz-executor 926 19855 88891 0 2 0 syz-executor 926 479349 88891 0 3 0x4000080 ttyout syz-executor *58080 142088 90702 0 7 0x4000000 syz-executor 58080 482431 90702 0 3 0x4000080 ttyout syz-executor 58080 184461 90702 0 3 0x4000080 fsleep syz-executor 74380 14489 40662 0 3 0x3000 suspend syz-executor 74380 296270 40662 0 3 0x4081000 biowait syz-executor 35109 235263 0 0 3 0x14200 bored sosplice 99675 281115 20099 0 3 0x100082 sbwait arp 20099 221400 4039 0 3 0x10008a sigsusp sh 44708 322937 22164 0 3 0x82 nanoslp syz-executor 90702 92887 22164 0 3 0x82 nanoslp syz-executor 88891 364769 22164 0 3 0x82 nanoslp syz-executor 89106 75063 22164 0 3 0x82 wait syz-executor 95124 97675 22164 0 3 0x82 nanoslp syz-executor 82368 9037 22164 0 3 0x82 nanoslp syz-executor 40662 210344 22164 0 3 0x82 wait syz-executor 4039 329131 22164 0 3 0x82 wait syz-executor 22164 59518 6533 0 3 0x82 kqread syz-executor 6533 40851 90394 0 3 0x10008a sigsusp ksh 90394 97174 49256 0 3 0x98 kqread sshd-session 49256 235938 47109 0 3 0x92 kqread sshd-session 34007 54622 1 0 3 0x100083 ttyin getty 47109 122291 1 0 3 0x88 kqread sshd 2928 416927 61080 74 3 0x1100092 bpf pflogd 61080 10232 1 0 3 0x80 sbwait pflogd 77000 46551 30199 73 3 0x1100090 kqread syslogd 30199 96302 1 0 3 0x100082 sbwait syslogd 92550 138684 1 0 3 0x100080 kqread resolvd 29182 27195 71259 77 3 0x100092 kqread dhcpleased 24733 439173 71259 77 3 0x100092 kqread dhcpleased 71259 231594 1 0 3 0x80 kqread dhcpleased 1638 16845 0 0 3 0x14200 bored smr 64815 467360 0 0 3 0x14200 pgzero zerothread 67193 333022 0 0 3 0x14200 aiodoned aiodoned 76451 429269 0 0 3 0x14200 syncer update 54355 115409 0 0 3 0x14200 cleaner cleaner 26244 12009 0 0 3 0x14200 reaper reaper 88966 444125 0 0 3 0x14200 pgdaemon pagedaemon 83754 165547 0 0 3 0x14200 bored viomb 23931 127775 0 0 3 0x40014200 acpi0 acpi0 50716 189893 0 0 3 0x40014200 idle1 77356 409024 0 0 3 0x14200 bored softnet1 39732 295464 0 0 3 0x14200 netlock softnet0 23499 414946 0 0 2 0x40014200 systqmp 92527 297191 0 0 3 0x14200 bored systq 97024 456666 0 0 3 0x14200 tmoslp softclockmp 19461 233525 0 0 3 0x40014200 tmoslp softclock 23340 366752 0 0 3 0x40014200 idle0 1 102620 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 74380 (syz-executor) thread 0xffff800032be5778 (296270) exclusive rrwlock inode r = 0 (0xfffffd806e9c7cb8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10214 11088K 11286K 166960K 11737 0 pcb 17 12K 12K 166960K 87 0 rtable 202 7K 7K 166960K 397 0 pf 35 17K 20K 166960K 81 0 ifaddr 40 6K 8K 166960K 66 0 ifgroup 58 2K 2K 166960K 99 0 sysctl 2 1K 9K 166960K 8 0 counters 68 36K 37K 166960K 110 0 ioctlops 0 0K 4K 166960K 1589 0 iov 0 0K 12K 166960K 24 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1377 87K 87K 166960K 1802 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 19 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 21 183K 240K 166960K 525 0 sigio 0 0K 0K 166960K 5 0 proc 73 131K 147K 166960K 551 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 38 0 in_multi 82 6K 7K 166960K 130 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 407 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 259 174K 188K 166960K 6518 0 UVM aobj 9 2K 4K 166960K 11 0 pinsyscall 45 90K 106K 166960K 1607 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 12 0K 1K 166960K 38 0 temp 45 8648K 8715K 166960K 27044 0 kqueue 13 20K 28K 166960K 101 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 62 0 56 1 0 1 1 0 8 0 rtentry 176 122 0 35 5 0 5 5 0 8 0 unpcb 144 175 0 156 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 127 0 122 4 3 1 4 0 8 0 arp 136 20 0 1 1 0 1 1 0 8 0 inpcb 328 449 0 438 7 5 2 7 0 8 0 nd6 152 22 0 3 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 15 0 15 1 0 1 1 0 8 1 pppxif 1504 6 0 6 1 0 1 1 0 8 1 pffrag 232 42 0 33 1 0 1 1 0 482 0 pffrnode 88 40 0 32 1 0 1 1 0 8 0 pffrent 40 78 0 69 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 49 0 6 1 0 1 1 0 8 0 pfstkey 128 49 0 6 2 0 2 2 0 8 0 pfstate 384 49 0 6 5 0 5 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 562 0 224 29 3 26 29 0 8 3 art_table 40 563 0 224 5 0 5 5 0 8 0 art_node 32 120 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 17 0 7 1 0 1 1 0 8 0 shmpl 112 8 0 2 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2330 0 819 96 0 96 96 0 8 0 ffsino 296 2330 0 819 118 0 118 118 0 8 0 nchpl 144 3038 0 1333 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 1 0 1 0 8 0 vnodes 216 2623 0 0 146 0 146 146 0 8 0 namei 1024 9654 0 9654 2 1 1 2 0 8 1 percpumem 16 70 0 21 1 0 1 1 0 8 0 kstatmem 264 50 0 24 3 0 3 3 0 8 1 scxspl 216 15145 0 15144 11 7 4 8 1 8 3 plimitpl 152 133 0 113 1 0 1 1 0 8 0 sigapl 424 805 0 755 7 0 7 7 0 8 0 knotepl 120 558 0 0 17 0 17 17 0 8 0 kqueuepl 224 155 0 145 1 0 1 1 0 8 0 pipepl 344 150 0 122 3 0 3 3 0 8 0 fdescpl 528 784 0 751 3 0 3 3 0 8 0 filepl 160 4080 0 3841 13 0 13 13 0 8 2 lockfpl 104 117 0 114 1 0 1 1 0 8 0 lockfspl 48 49 0 46 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 40 0 23 1 0 1 1 0 8 0 ucredpl 104 793 0 778 1 0 1 1 0 8 0 zombiepl 144 758 0 755 1 0 1 1 0 8 0 processpl 1232 805 0 755 5 0 5 5 0 8 0 procpl 664 1468 0 1412 6 0 6 6 0 8 0 sosppl 168 7 0 7 1 0 1 1 0 8 1 sockpl 752 763 0 727 10 5 5 10 0 8 0 mcl64k 65536 18 0 0 3 0 3 3 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 113 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 35 0 0 5 0 5 5 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 197 0 0 13 0 13 13 0 8 0 bufpl 280 6006 0 132 420 0 420 420 0 8 0 anonpl 32 11226 0 0 91 0 91 91 0 246 0 amapchunkpl 152 21101 0 20574 30 0 30 30 0 158 8 amappl16 200 3769 0 3501 29 14 15 26 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 8 0 8 1 1 0 1 0 8 0 amappl13 176 430 0 427 1 0 1 1 0 8 0 amappl12 168 1155 0 1110 3 0 3 3 0 8 0 amappl11 160 14 0 14 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 251 0 250 1 0 1 1 0 8 0 amappl8 136 31 0 28 1 0 1 1 0 8 0 amappl7 128 81 0 80 1 0 1 1 0 8 0 amappl6 120 273 0 258 1 0 1 1 0 8 0 amappl5 112 87 0 75 1 0 1 1 0 8 0 amappl4 104 408 0 374 1 0 1 1 0 8 0 amappl3 96 3423 0 3325 4 1 3 3 0 8 0 amappl2 88 910 0 829 2 0 2 2 0 8 0 amappl1 80 10406 0 9785 15 1 14 15 0 8 0 amappl 88 5728 0 5553 5 0 5 5 0 92 0 uvmvnodes 80 2623 0 0 54 0 54 54 0 8 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 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 72 10 0 2 1 0 1 1 0 8 0 uaddrrnd 24 784 0 751 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 784 0 751 1 0 1 1 0 8 0 vmmpekpl 168 8092 0 8055 3 0 3 3 0 8 1 vmmpepl 168 57534 0 55286 108 7 101 108 0 357 1 vmsppl 488 783 0 751 5 0 5 5 0 8 0 rwobjpl 80 21520 0 17669 79 0 79 79 0 8 0 pdppl 4096 1576 0 1502 98 24 74 86 0 8 0 pvpl 32 18458 0 0 150 1 149 149 0 265 0 pmappl 256 783 0 751 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 279 0 35 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83843ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff839a8668) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a8668) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c42a050,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff839a8668) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a8668) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c42a1b0,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x76a79230b130, count: 6 ddb{0}> trace x86_ipi_db(ffffffff83843ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff839a8668) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a8668) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c42a050,ffff80000006ac00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff839a8668) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839a8668) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80003c42a1b0,ffff80000007aa80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f end of kernel end trace frame: 0x76a79230b130, count: -9 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7e247e249480, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7e247e249480, count: -1