uvm_fault(0xfffffd806c4bf020, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81ab3eb8 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80003c3fd8b0 gsbase 0xffff8000299bdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81ab3eb8 Starting stack trace... panic(ffffffff83487d88) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c3fd800) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003bbd87e8,fffffd806bdc88a0,ffff80003c3fd9e0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2771 sys_futimes(ffff80003bbd87e8,ffff80003c3fdb30,ffff80003c3fda80) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2813 syscall(ffff80003c3fdb30) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3fdb30) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xca6d93516d0, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 456599 97752 0 0 0 0 syz-executor *392943 58617 0 0x10 0 1 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7251ef7f3da0, 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(0xfffffd806c4bf020, 0x98, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7251ef7f3da0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c3f11f0 rbx 0 rdx 0 rcx 0xffff80003bbd8550 rax 0x2a r8 0xffff80003c3f1120 r9 0x1 r10 0x2ce6e8da65a44f4d r11 0x28ef1427a9ed5ee r12 0 r13 0 r14 0 r15 0 rip 0xffffffff817bd4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c3f1170 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=392943 pid=58617 tcnt=2 stat=onproc flags process=10 proc=0 runpri=52, usrpri=52, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003bbd94e0,0xffff80003bbd8d28 process=0xffff80003c3f66a0 user=0xffff80003c3ec000, vmspace=0xfffffd806c4bf208 estcpu=3, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 97752 456599 65241 0 7 0 syz-executor 97752 145259 65241 0 3 0x4000000 sbar syz-executor *58617 392943 56642 0 7 0x10 syz-executor 58617 56231 56642 0 3 0x4000090 fsleep syz-executor 58469 347888 44054 0 2 0 syz-executor 58469 456216 44054 0 3 0x4000080 fsleep syz-executor 70068 139525 89640 0 2 0 syz-executor 70068 395629 89640 0 3 0x4000000 smrbar syz-executor 98593 215587 51715 0 3 0x80 nanoslp syz-executor 98593 264234 51715 0 3 0x4000080 kqsel syz-executor 98593 479769 51715 0 3 0x4000080 fsleep syz-executor 75243 244410 28054 0 2 0 syz-executor 75243 503544 28054 0 3 0x4000080 fsleep syz-executor 75243 495425 28054 0 3 0x4000080 fsleep syz-executor 57998 335242 32784 0 3 0x3000 suspend syz-executor 57998 310385 32784 0 2 0x4081000 syz-executor 57998 321232 32784 0 2 0x4081000 syz-executor 28054 54508 93184 0 3 0x82 nanoslp syz-executor 44054 240821 93184 0 3 0x82 nanoslp syz-executor 51715 380898 93184 0 3 0x82 nanoslp syz-executor 56642 241196 93184 0 3 0x82 nanoslp syz-executor 32784 176412 93184 0 3 0x82 nanoslp syz-executor 65241 363161 93184 0 3 0x82 nanoslp syz-executor 91917 443941 93184 0 3 0x82 wait syz-executor 89640 484051 93184 0 3 0x82 nanoslp syz-executor 93184 496533 83952 0 3 0x82 kqread syz-executor 83952 518761 57060 0 3 0x10008a sigsusp ksh 57060 140146 52309 0 3 0x98 kqread sshd-session 52309 125050 56286 0 3 0x92 kqread sshd-session 68007 454872 1 0 3 0x100083 ttyin getty 56286 441905 1 0 3 0x88 kqread sshd 10628 437617 29360 74 3 0x1100092 bpf pflogd 29360 490715 1 0 3 0x80 sbwait pflogd 98785 510872 51724 73 3 0x1100090 kqread syslogd 51724 206541 1 0 3 0x100082 sbwait syslogd 53171 498221 1 0 3 0x100080 kqread resolvd 73694 296834 94910 77 3 0x100092 kqread dhcpleased 98837 176435 94910 77 3 0x100092 kqread dhcpleased 94910 305787 1 0 3 0x80 kqread dhcpleased 34715 271151 0 0 3 0x14200 bored smr 39460 398945 0 0 2 0x14200 zerothread 53411 446484 0 0 3 0x14200 aiodoned aiodoned 33967 373981 0 0 3 0x14200 syncer update 10672 265029 0 0 3 0x14200 cleaner cleaner 56429 2097 0 0 3 0x14200 reaper reaper 91523 237880 0 0 3 0x14200 pgdaemon pagedaemon 11421 115172 0 0 3 0x14200 bored viomb 80615 345431 0 0 3 0x40014200 acpi0 acpi0 66250 435076 0 0 3 0x40014200 idle1 79271 466133 0 0 3 0x14200 bored softnet1 75129 359224 0 0 3 0x14200 netlock softnet0 70892 198056 0 0 3 0x14200 smrbar systqmp 32405 332714 0 0 3 0x14200 bored systq 30398 436463 0 0 3 0x14200 tmoslp softclockmp 28369 86957 0 0 3 0x40014200 tmoslp softclock 73126 188837 0 0 3 0x40014200 idle0 1 400767 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 97752 (syz-executor) thread 0xffff80003bbd87e8 (145259) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839d2f80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 Process 70892 (systqmp) thread 0xffff8000ffffe7c8 (198056) shared rwlock systqmp r = 0 (0xffffffff839253f8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11068 12103K 12279K 166960K 12221 0 pcb 23 12K 12K 166960K 36 0 rtable 241 7K 7K 166960K 358 0 pf 39 18K 18K 166960K 55 0 ifaddr 47 7K 7K 166960K 52 0 ifgroup 59 2K 2K 166960K 68 0 sysctl 1 1K 9K 166960K 7 0 counters 78 37K 37K 166960K 86 0 ioctlops 0 0K 4K 166960K 1494 0 iov 0 0K 8K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1305 82K 82K 166960K 1404 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 182 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 180K 166960K 560 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 1 0K 0K 166960K 7 0 in_multi 99 7K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 385 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 246 167K 184K 166960K 3600 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 43 86K 106K 166960K 1329 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 2 0 NDP 14 0K 1K 166960K 32 0 temp 39 9075K 9143K 166960K 7126 0 kqueue 16 26K 26K 166960K 32 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 34 0 31 1 0 1 1 0 8 0 rtentry 176 112 0 2 6 0 6 6 0 8 0 unpcb 144 61 0 42 2 0 2 2 0 8 1 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 21 0 16 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 106 0 89 2 0 2 2 0 8 0 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 6 0 2 1 0 1 1 0 8 0 pppxif 1576 2 0 2 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 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 24 0 0 1 0 1 1 0 8 0 pfstkey 128 24 0 0 1 0 1 1 0 8 0 pfstate 448 24 0 0 3 0 3 3 0 8 0 pfrule 1360 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 458 0 6 29 0 29 29 0 8 0 art_table 40 459 0 6 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1644 0 171 93 0 93 93 0 8 0 ffsino 296 1644 0 171 114 0 114 114 0 8 0 nchpl 144 1907 0 198 64 0 64 64 0 8 0 rtmask 32 2 0 0 1 0 1 1 0 8 0 vnodes 216 1761 0 0 98 0 98 98 0 8 0 namei 1024 5857 0 5857 2 0 2 2 0 8 2 percpumem 16 58 0 4 1 0 1 1 0 8 0 kstatmem 264 34 0 4 3 0 3 3 0 8 0 scxspl 216 6603 0 6603 3 1 2 2 1 8 2 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 496 0 448 7 0 7 7 0 8 0 knotepl 120 313 0 0 10 0 10 10 0 8 0 kqueuepl 224 35 0 20 1 0 1 1 0 8 0 pipepl 344 126 0 99 3 0 3 3 0 8 0 fdescpl 528 480 0 448 3 0 3 3 0 8 0 filepl 160 1851 0 1613 11 0 11 11 0 8 1 lockfpl 104 23 0 20 1 0 1 1 0 8 0 lockfspl 48 12 0 9 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 149 0 135 1 0 1 1 0 8 0 zombiepl 144 450 0 448 1 0 1 1 0 8 0 processpl 1232 496 0 448 5 0 5 5 0 8 0 procpl 664 589 0 531 6 0 6 6 0 8 0 sockpl 752 204 0 165 5 0 5 5 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 10 0 0 2 0 2 2 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 180 0 0 12 0 12 12 0 8 0 bufpl 280 2442 0 105 167 0 167 167 0 8 0 anonpl 32 5463 0 0 44 0 44 44 0 246 0 amapchunkpl 152 10214 0 9688 26 0 26 26 0 158 5 amappl16 200 1989 0 1965 5 3 2 5 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 430 0 429 1 0 1 1 0 8 0 amappl13 176 133 0 121 1 0 1 1 0 8 0 amappl12 168 734 0 703 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 63 0 49 1 0 1 1 0 8 0 amappl9 144 278 0 278 1 1 0 1 0 8 0 amappl8 136 101 0 99 1 0 1 1 0 8 0 amappl7 128 161 0 148 1 0 1 1 0 8 0 amappl6 120 158 0 157 1 0 1 1 0 8 0 amappl5 112 97 0 86 1 0 1 1 0 8 0 amappl4 104 314 0 294 1 0 1 1 0 8 0 amappl3 96 1751 0 1629 4 0 4 4 0 8 0 amappl2 88 533 0 474 2 0 2 2 0 8 0 amappl1 80 9976 0 9364 16 0 16 16 0 8 2 amappl 88 2861 0 2687 5 0 5 5 0 92 0 uvmvnodes 80 100 0 0 3 0 3 3 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 128 253 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 480 0 448 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 480 0 448 1 0 1 1 0 8 0 vmmpekpl 168 5872 0 5841 2 0 2 2 0 8 0 vmmpepl 168 39633 0 37661 96 0 96 96 0 357 8 vmsppl 488 479 0 448 5 0 5 5 0 8 0 rwobjpl 80 14771 0 13726 26 0 26 26 0 8 3 pdppl 4096 967 0 896 99 28 71 87 0 8 0 pvpl 32 13661 0 0 112 1 111 112 0 265 0 pmappl 256 479 0 448 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 272 0 31 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83940ff0) 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(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) 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 __mp_lock(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 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: 0x796653eb0020, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83940ff0) 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(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) 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 __mp_lock(ffffffff839d2780) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d2780) at __mp_lock+0x192 sys/kern/kern_lock.c:173 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: 0x796653eb0020, count: -11 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7251ef7f3da0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7251ef7f3da0, count: -1