uvm_fault(0xfffff6000f1b99a8, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82456b28 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff800031798bc0 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82456b28 Starting stack trace... panic(ffffffff834f00ae) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff800031798b10) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fe8fc8,fffff6006709ed88,ffff800031798cd0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimens(ffff800045fe8fc8,ffff800031798e20,ffff800031798d70) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2766 syscall(ffff800031798e20) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800031798e20) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x273b88ed9b0, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 1175791280 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 87030 42541 0 0 0 0 syz-executor *172555 8856 0 0 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7c7d4e7d8170, 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}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffff6000f1b99a8, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7c7d4e7d8170, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002ef86270 rbx 0 rdx 0 rcx 0xffff800045fe9cc0 rax 0x3b r8 0xffff80002ef861a0 r9 0x1 r10 0x266e0762f46822f8 r11 0xde77d36ceaaae0bf r12 0 r13 0 r14 0xffff800045fe9cc0 r15 0 rip 0xffffffff816033ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002ef861f0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=172555 pid=8856 tcnt=3 stat=onproc flags process=0 proc=0 runpri=77, usrpri=78, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4047f8,0xffff800045fe8fd8 process=0xffff80003c478e98 user=0xffff80002ef81000, vmspace=0xfffff6000f1b99a8 estcpu=28, cpticks=3, pctcpu=0.2, user=1, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 72592 474926 25687 0 2 0 syz-executor 42541 87030 52188 0 7 0 syz-executor 42541 185737 52188 0 2 0x4000000 syz-executor 48481 269410 24293 0 2 0 syz-executor 48481 307685 24293 0 3 0x4000080 msgwait syz-executor 48481 263011 24293 0 3 0x4000080 fsleep syz-executor 31010 20368 70558 0 2 0 syz-executor 54072 449431 76133 0 2 0 syz-executor 54072 279258 76133 0 3 0x4000080 fsleep syz-executor 54072 180960 76133 0 3 0x4000080 ttyopn syz-executor 54072 484429 76133 0 3 0x4000080 fsleep syz-executor 16966 274257 23685 0 2 0 syz-executor 16966 108835 23685 0 3 0x4000080 fsleep syz-executor 47461 192309 95281 0 2 0 syz-executor * 8856 172555 8109 0 7 0 syz-executor 8856 410135 8109 0 3 0x4000000 sbar syz-executor 8856 325922 8109 0 3 0x4000080 fsleep syz-executor 34871 332723 0 0 3 0x14280 nfsidl nfsio 58195 66798 0 0 3 0x14280 nfsidl nfsio 32609 201021 0 0 3 0x14280 nfsidl nfsio 9868 369669 0 0 3 0x14280 nfsidl nfsio 62049 359439 0 0 3 0x14280 nfsidl nfsio 14061 120293 0 0 3 0x14280 nfsidl nfsio 12471 227572 0 0 3 0x14280 nfsidl nfsio 65852 66904 0 0 3 0x14280 nfsidl nfsio 68565 442701 0 0 3 0x14280 nfsidl nfsio 85150 513846 0 0 3 0x14280 nfsidl nfsio 13109 225247 0 0 3 0x14280 nfsidl nfsio 8540 223873 0 0 3 0x14280 nfsidl nfsio 14949 40547 0 0 3 0x14280 nfsidl nfsio 38173 44213 0 0 3 0x14280 nfsidl nfsio 58685 504231 0 0 3 0x14280 nfsidl nfsio 68480 247472 0 0 3 0x14280 nfsidl nfsio 917 472597 0 0 3 0x14280 nfsidl nfsio 93320 491278 0 0 3 0x14280 nfsidl nfsio 49643 252590 0 0 3 0x14280 nfsidl nfsio 57705 152297 0 0 3 0x14280 nfsidl nfsio 16111 148702 1 0 3 0x100083 ttyin getty 8109 516333 51431 0 3 0x82 nanoslp syz-executor 25687 307121 51431 0 3 0x82 nanoslp syz-executor 24293 120754 51431 0 3 0x82 nanoslp syz-executor 95281 339518 51431 0 3 0x82 nanoslp syz-executor 76133 344281 51431 0 3 0x82 nanoslp syz-executor 52188 74058 51431 0 3 0x82 nanoslp syz-executor 23685 132440 51431 0 3 0x82 nanoslp syz-executor 70558 267120 51431 0 3 0x82 nanoslp syz-executor 51431 383959 32277 0 3 0x82 kqread syz-executor 32277 491713 59133 0 3 0x10008a sigsusp ksh 59133 86832 11442 0 3 0x98 kqread sshd-session 11442 57237 47024 0 3 0x92 kqread sshd-session 47024 460329 1 0 3 0x88 kqread sshd 8097 193289 78844 74 3 0x1100092 bpf pflogd 78844 479554 1 0 3 0x80 sbwait pflogd 37330 223923 86303 73 3 0x1100090 kqread syslogd 86303 350025 1 0 3 0x100082 sbwait syslogd 93551 291496 1 0 3 0x100080 kqread resolvd 53771 489581 2178 77 3 0x100092 kqread dhcpleased 16623 97739 2178 77 3 0x100092 kqread dhcpleased 2178 343758 1 0 3 0x80 kqread dhcpleased 7815 30650 0 0 3 0x14200 bored smr 47357 408159 0 0 2 0x14200 zerothread 77991 462126 0 0 3 0x14200 aiodoned aiodoned 8116 211161 0 0 3 0x14200 syncer update 77420 266417 0 0 3 0x14200 cleaner cleaner 15640 492743 0 0 3 0x14200 reaper reaper 57655 347606 0 0 3 0x14200 pgdaemon pagedaemon 95886 465552 0 0 3 0x14200 bored viomb 14366 340500 0 0 3 0x40014200 acpi0 acpi0 37943 253657 0 0 3 0x40014200 idle1 97396 26783 0 0 3 0x14200 bored softnet1 99226 218363 0 0 3 0x14200 netlock softnet0 63061 384281 0 0 2 0x40014200 systqmp 75702 17983 0 0 3 0x14200 bored systq 75746 1823 0 0 3 0x14200 tmoslp softclockmp 82443 522258 0 0 3 0x40014200 tmoslp softclock 10005 262990 0 0 3 0x40014200 idle0 1 420925 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 8856 (syz-executor) thread 0xffff800045fe8fc8 (410135) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11074 12087K 12349K 166960K 12709 0 pcb 17 12K 12K 166960K 112 0 rtable 200 8K 9K 166960K 411 0 pf 40 19K 83K 166960K 172 0 ifaddr 37 6K 8K 166960K 68 0 ifgroup 51 2K 2K 166960K 99 0 sysctl 4 1K 9K 166960K 10 0 counters 68 36K 37K 166960K 116 0 ioctlops 0 0K 4K 166960K 1584 0 iov 0 0K 24K 166960K 72 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1442 91K 91K 166960K 2043 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 209 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 228K 166960K 637 0 sigio 0 0K 0K 166960K 4 0 proc 73 115K 163K 166960K 613 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 85 0 in_multi 86 6K 7K 166960K 130 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 25 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 169 758K 758K 166960K 169 0 exec 0 0K 1K 166960K 544 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 219 158K 182K 166960K 7354 0 UVM aobj 15 2K 2K 166960K 17 0 pinsyscall 43 86K 100K 166960K 1784 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 11 0K 1K 166960K 45 0 temp 55 9122K 9180K 166960K 27150 0 kqueue 13 20K 34K 166960K 112 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 120 123 0 120 3 1 2 2 0 8 1 rtentry 176 123 0 39 5 0 5 5 0 8 0 unpcb 144 434 0 417 6 3 3 3 0 8 2 syncache 336 7 0 7 3 2 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpcb 736 151 0 147 4 3 1 4 0 8 0 arp 136 18 0 4 1 0 1 1 0 8 0 inpcb 328 546 0 539 6 4 2 6 0 8 1 nd6 152 28 0 4 2 0 2 2 0 8 0 pkpcb 40 5 0 5 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 19 0 19 2 1 1 1 0 8 1 pppxif 1576 1 0 1 1 1 0 1 0 8 0 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pffrag 232 12 0 2 1 0 1 1 0 482 0 pffrnode 88 11 0 2 1 0 1 1 0 8 0 pffrent 40 15 0 5 2 1 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 7 0 4 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfstlim 224 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 15 0 10 1 0 1 1 0 8 0 pftag 88 3 0 2 1 0 1 1 0 8 0 pfstitem 24 77 0 9 1 0 1 1 0 8 0 pfstkey 128 77 0 10 3 0 3 3 0 8 0 pfstate 448 73 0 9 8 0 8 8 0 8 0 pfrule 1360 29 0 21 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 606 0 222 30 0 30 30 0 8 1 art_table 40 607 0 222 5 0 5 5 0 8 0 art_node 32 123 0 48 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 2 2 1 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 193 0 183 1 0 1 1 0 8 0 shmpl 112 14 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2519 0 1059 93 0 93 93 0 8 0 ffsino 296 2519 0 1059 114 0 114 114 0 8 0 nchpl 144 3405 0 1700 64 0 64 64 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 vnodes 216 3092 0 0 172 0 172 172 0 8 0 namei 1024 11208 0 11208 3 2 1 2 0 8 1 percpumem 16 73 0 24 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 59 0 34 4 1 3 3 0 8 1 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 11183 0 11183 4 2 2 3 1 8 2 plimitpl 152 291 0 274 1 0 1 1 0 8 0 sigapl 424 962 0 894 9 1 8 8 0 8 0 knotepl 120 538 0 0 17 0 17 17 0 8 0 kqueuepl 224 197 0 187 4 2 2 3 0 8 1 pipepl 344 171 0 144 3 0 3 3 0 8 0 fdescpl 528 926 0 894 3 0 3 3 0 8 0 filepl 160 5276 0 4995 21 5 16 16 0 8 4 lockfpl 104 334 0 330 2 1 1 2 0 8 0 lockfspl 48 146 0 142 1 0 1 1 0 8 0 sessionpl 144 48 0 39 1 0 1 1 0 8 0 pgrppl 48 57 0 40 1 0 1 1 0 8 0 ucredpl 104 863 0 850 1 0 1 1 0 8 0 zombiepl 144 989 0 989 2 1 1 1 0 8 1 processpl 1232 962 0 894 6 0 6 6 0 8 0 procpl 664 1836 0 1759 8 0 8 8 0 8 0 sosppl 176 3 0 3 2 1 1 1 0 8 1 sockpl 752 1125 0 1098 15 6 9 11 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k128 9344 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 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 68 0 0 9 0 9 9 0 8 1 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 234 0 0 14 0 14 14 0 8 0 bufpl 272 3659 0 115 238 1 237 237 0 8 0 anonpl 32 7514 0 0 61 0 61 61 0 247 0 amapchunkpl 152 24625 0 24198 50 17 33 33 0 158 14 amappl16 200 2057 0 2027 7 3 4 5 0 8 0 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 480 0 479 1 0 1 1 0 8 0 amappl13 176 123 0 111 1 0 1 1 0 8 0 amappl12 168 1176 0 1148 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 76 0 61 1 0 1 1 0 8 0 amappl9 144 302 0 302 1 1 0 1 0 8 0 amappl8 136 98 0 96 1 0 1 1 0 8 0 amappl7 128 148 0 134 1 0 1 1 0 8 0 amappl6 120 157 0 156 1 0 1 1 0 8 0 amappl5 112 213 0 202 1 0 1 1 0 8 0 amappl4 104 295 0 275 1 0 1 1 0 8 0 amappl3 96 4834 0 4734 4 0 4 4 0 8 0 amappl2 88 540 0 479 2 0 2 2 0 8 0 amappl1 80 12525 0 11928 14 1 13 14 0 8 0 amappl 88 6548 0 6401 6 1 5 5 0 92 0 uvmvnodes 80 118 0 0 3 0 3 3 0 8 0 dma65536 65536 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 128 254 0 254 2 1 1 1 0 8 1 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 16 0 2 1 0 1 1 0 8 0 uaddrrnd 24 926 0 894 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 926 0 894 1 0 1 1 0 8 0 vmmpekpl 168 9353 0 9319 3 0 3 3 0 8 0 vmmpepl 168 65795 0 63878 93 5 88 88 0 357 1 vmsppl 488 925 0 894 5 1 4 5 0 8 0 rwobjpl 80 19887 0 18847 23 0 23 23 0 8 0 pdppl 4096 1859 0 1788 107 36 71 85 0 8 0 pvpl 32 14506 0 0 119 2 117 118 0 265 0 pmappl 256 925 0 894 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 543 0 49 15 0 15 15 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff839a7ff0) 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(ffffffff83a04680) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a04680) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7649ae396750, count: 4 ddb{0}> trace x86_ipi_db(ffffffff839a7ff0) 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(ffffffff83a04680) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a04680) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7649ae396750, count: -11 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7c7d4e7d8170, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7c7d4e7d8170, count: -1