uvm_fault(0xfffff5806c695200, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81235a18 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80003c48f1c0 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81235a18 Starting stack trace... panic(ffffffff834eb72c) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c48f110) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c4a34f8,fffff5805fcd5460,ffff80003c48f2f0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff80003c4a34f8,ffff80003c48f440,ffff80003c48f390) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff80003c48f440) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c48f440) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc1c2aed29e0, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 2067326224 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *206220 97758 0 0 0 1 syz-executor 300087 47037 0 0x14000 0x40000200 0 softclock savectx() at savectx+0xae end of kernel end trace frame: 0x7df3e60d6500, 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(0xfffff5806c695200, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7df3e60d6500, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c483330 rbx 0 rdx 0 rcx 0xffff80003c3d22c8 rax 0x3b r8 0xffff80003c483260 r9 0x1 r10 0x1bc9eeb6eba85bdd r11 0xac4cf0adc690b2b2 r12 0 r13 0 r14 0xffff80003c3d22c8 r15 0 rip 0xffffffff820d43ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c4832b0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=206220 pid=97758 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c3d2030,0xffff80003c4a3508 process=0xffff80003c4521d8 user=0xffff80003c47e000, vmspace=0xfffff5806c695200 estcpu=36, cpticks=2, pctcpu=0.0, user=2, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 95355 295852 54819 0 2 0 syz-executor 4993 381761 81863 0 2 0 syz-executor 4993 337553 81863 0 3 0x4000080 fsleep syz-executor *97758 206220 57963 0 7 0 syz-executor 97758 340477 57963 0 3 0x4000000 sbar syz-executor 86176 417444 6885 0 2 0x10 syz-executor 86176 104697 6885 0 3 0x4000090 fsleep syz-executor 86176 54553 6885 0 3 0x4000090 fsleep syz-executor 76899 341631 3484 0 2 0xc80 syz-executor 76899 508611 3484 0 3 0x4000080 ttyin syz-executor 76899 145838 3484 0 3 0x4000080 fsleep syz-executor 76899 232690 3484 0 3 0x4000080 fsleep syz-executor 12114 251438 4058 0 2 0x1000c80 syz-executor 12114 308021 4058 0 3 0x5000080 sbwait syz-executor 12114 173885 4058 0 3 0x5000080 fsleep syz-executor 12114 457391 4058 0 3 0x5000080 fsleep syz-executor 65355 241961 66969 0 2 0xc80 syz-executor 65355 34184 66969 0 3 0x4000080 pipewr syz-executor 65355 142315 66969 0 3 0x4000080 fsleep syz-executor 60818 4003 71659 0 4 0x48000001 syz-executor 60818 445954 71659 0 4 0x4c000001 syz-executor 12107 154921 1 0 2 0x100083 getty 65163 98735 0 0 3 0x14280 nfsidl nfsio 10002 391589 0 0 3 0x14280 nfsidl nfsio 49742 54823 0 0 3 0x14280 nfsidl nfsio 1592 297737 0 0 3 0x14280 nfsidl nfsio 80101 338884 0 0 3 0x14280 nfsidl nfsio 80591 23068 0 0 3 0x14280 nfsidl nfsio 12817 406442 0 0 3 0x14280 nfsidl nfsio 30570 484107 0 0 3 0x14280 nfsidl nfsio 87974 17131 0 0 3 0x14280 nfsidl nfsio 3397 506999 0 0 3 0x14280 nfsidl nfsio 66481 318911 0 0 3 0x14280 nfsidl nfsio 34379 122779 0 0 3 0x14280 nfsidl nfsio 46400 168391 0 0 3 0x14280 nfsidl nfsio 36638 324816 0 0 3 0x14280 nfsidl nfsio 73956 275699 0 0 3 0x14280 nfsidl nfsio 74755 304303 0 0 3 0x14280 nfsidl nfsio 64520 371928 0 0 3 0x14280 nfsidl nfsio 3060 202987 0 0 3 0x14280 nfsidl nfsio 1716 401538 0 0 3 0x14280 nfsidl nfsio 64830 93222 0 0 3 0x14280 nfsidl nfsio 66969 278003 55984 0 2 0xc82 syz-executor 57963 241994 55984 0 2 0xc82 syz-executor 81863 361735 55984 0 2 0xc82 syz-executor 4058 446270 55984 0 2 0xc82 syz-executor 6885 412718 55984 0 2 0xc82 syz-executor 54819 171695 55984 0 2 0xc82 syz-executor 71659 44863 55984 0 2 0xc82 syz-executor 3484 325421 55984 0 2 0xc82 syz-executor 55984 155654 54810 0 2 0x2 syz-executor 54810 397985 35970 0 3 0x10008a sigsusp ksh 35970 132663 82706 0 3 0x98 kqread sshd-session 82706 205329 73026 0 3 0x92 kqread sshd-session 73026 385492 1 0 3 0x88 kqread sshd 61514 321576 47656 74 3 0x1100092 bpf pflogd 47656 341346 1 0 3 0x80 sbwait pflogd 38457 134600 49190 73 3 0x1100090 kqread syslogd 49190 384993 1 0 3 0x100082 sbwait syslogd 45430 490886 1 0 3 0x100080 kqread resolvd 1308 178339 94092 77 3 0x100092 kqread dhcpleased 18922 199610 94092 77 3 0x100092 kqread dhcpleased 94092 14177 1 0 3 0x80 kqread dhcpleased 10968 248303 0 0 2 0x14200 smr 55506 3244 0 0 2 0x14200 zerothread 39551 34404 0 0 3 0x14200 aiodoned aiodoned 11177 303541 0 0 3 0x14200 syncer update 41683 379122 0 0 3 0x14200 cleaner cleaner 44735 77568 0 0 3 0x14200 reaper reaper 92821 285359 0 0 3 0x14200 pgdaemon pagedaemon 53488 109144 0 0 3 0x14200 bored viomb 30141 393344 0 0 3 0x40014200 acpi0 acpi0 7706 522177 0 0 3 0x40014200 idle1 73905 315399 0 0 3 0x14200 bored softnet1 44209 498401 0 0 2 0x14200 softnet0 28373 191129 0 0 3 0x14200 smrbar systqmp 45788 471617 0 0 3 0x14200 bored systq 68668 44915 0 0 2 0x14200 softclockmp 47037 300087 0 0 7 0x40014200 softclock 6703 27273 0 0 3 0x40014200 idle0 1 380972 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 4993 (syz-executor) thread 0xffff80003c4a2568 (381761) shared rwlock amaplk r = 0 (0xfffff5806d5a8a58) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffff5806c695aa0) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 97758 (syz-executor) thread 0xffff80003c4a34f8 (340477) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83b2df00) #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 28373 (systqmp) thread 0xffff8000ffffea60 (191129) shared rwlock systqmp r = 0 (0xffffffff839d03c8) #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 11077 12096K 12353K 166960K 12385 0 pcb 23 12K 12K 166960K 73 0 rtable 155 5K 6K 166960K 409 0 pf 28 16K 23K 166960K 85 0 ifaddr 30 5K 6K 166960K 60 0 ifgroup 39 1K 2K 166960K 77 0 sysctl 4 1K 9K 166960K 8 0 counters 62 36K 37K 166960K 90 0 ioctlops 0 0K 4K 166960K 1526 0 iov 0 0K 12K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1403 88K 88K 166960K 1617 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 97K 166960K 335 0 sigio 1 0K 0K 166960K 1 0 proc 72 115K 164K 166960K 584 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 88 0 in_multi 58 4K 6K 166960K 113 0 ether_multi 1 0K 0K 166960K 2 0 mrt 2 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 408 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 251 152K 162K 166960K 4929 0 UVM aobj 10 2K 2K 166960K 11 0 pinsyscall 43 86K 106K 166960K 1525 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 5 0 NDP 8 0K 1K 166960K 35 0 temp 43 9116K 9127K 166960K 9300 0 kqueue 14 22K 29K 166960K 74 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 53 0 50 1 0 1 1 0 8 0 rtentry 176 127 0 62 5 0 5 5 0 8 0 unpcb 144 210 0 190 4 0 4 4 0 8 3 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 68 0 61 3 0 3 3 0 8 2 arp 136 19 0 8 1 0 1 1 0 8 0 inpcb 328 253 0 234 3 0 3 3 0 8 1 nd6 152 26 0 12 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 8 0 8 1 0 1 1 0 8 1 pppxif 1576 2 0 2 1 0 1 1 0 8 1 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 6 0 2 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 40 0 0 1 0 1 1 0 8 0 pfstkey 128 40 0 0 2 0 2 2 0 8 0 pfstate 448 39 0 0 5 0 5 5 0 8 0 pfrule 1360 24 0 18 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 547 0 247 29 0 29 29 0 8 8 art_table 40 549 0 247 5 0 5 5 0 8 0 art_node 32 126 0 69 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 72 13 0 4 1 0 1 1 0 8 0 shmpl 112 8 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1927 0 462 92 0 92 92 0 8 0 ffsino 296 1927 0 462 114 0 114 114 0 8 0 nchpl 144 2402 0 691 64 0 64 64 0 8 0 vnodes 216 2209 0 0 123 0 123 123 0 8 0 namei 1024 7733 0 7733 1 0 1 1 0 8 1 percpumem 16 60 0 14 1 0 1 1 0 8 0 kstatmem 264 41 0 22 3 0 3 3 0 8 1 scxspl 216 9910 0 9910 3 2 1 2 1 8 1 plimitpl 152 88 0 70 1 0 1 1 0 8 0 sigapl 424 682 0 614 8 0 8 8 0 8 0 knotepl 120 495 0 0 15 0 15 15 0 8 0 kqueuepl 224 78 0 68 2 0 2 2 0 8 1 pipepl 344 216 0 187 3 0 3 3 0 8 0 fdescpl 528 646 0 614 3 0 3 3 0 8 0 filepl 160 3229 0 2994 15 0 15 15 0 8 4 lockfpl 104 108 0 105 1 0 1 1 0 8 0 lockfspl 48 52 0 49 1 0 1 1 0 8 0 sessionpl 144 36 0 25 1 0 1 1 0 8 0 pgrppl 48 44 0 25 1 0 1 1 0 8 0 ucredpl 104 413 0 398 1 0 1 1 0 8 0 zombiepl 144 614 0 614 1 0 1 1 0 8 1 processpl 1232 682 0 614 6 0 6 6 0 8 0 procpl 664 1020 0 939 8 0 8 8 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 752 522 0 480 11 0 11 11 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k 2048 38 0 0 5 0 5 5 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 226 0 0 15 0 15 15 0 8 0 bufpl 280 3738 0 106 260 0 260 260 0 8 0 anonpl 32 7646 0 0 62 0 62 62 0 246 0 amapchunkpl 152 14414 0 13839 24 0 24 24 0 158 0 amappl16 200 2346 0 2282 17 2 15 15 0 8 11 amappl15 192 10 0 10 2 2 0 1 0 8 0 amappl14 184 443 0 441 1 0 1 1 0 8 0 amappl13 176 128 0 114 1 0 1 1 0 8 0 amappl12 168 901 0 871 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 61 0 47 1 0 1 1 0 8 0 amappl9 144 280 0 280 1 1 0 1 0 8 0 amappl8 136 100 0 97 1 0 1 1 0 8 0 amappl7 128 152 0 139 1 0 1 1 0 8 0 amappl6 120 163 0 161 1 0 1 1 0 8 0 amappl5 112 98 0 88 1 0 1 1 0 8 0 amappl4 104 309 0 286 1 0 1 1 0 8 0 amappl3 96 2797 0 2677 4 0 4 4 0 8 0 amappl2 88 565 0 504 2 0 2 2 0 8 0 amappl1 80 11411 0 10809 15 0 15 15 0 8 2 amappl 88 4143 0 3962 5 0 5 5 0 92 0 uvmvnodes 80 109 0 0 3 0 3 3 0 8 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 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 8 0 8 2 1 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 10 0 1 1 0 1 1 0 8 0 uaddrrnd 24 646 0 614 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 646 0 614 1 0 1 1 0 8 0 vmmpekpl 168 7436 0 7396 2 0 2 2 0 8 0 vmmpepl 168 49777 0 47768 98 0 98 98 0 357 5 vmsppl 488 645 0 614 5 0 5 5 0 8 1 rwobjpl 80 17325 0 16218 28 0 28 28 0 8 2 pdppl 4096 1299 0 1228 103 32 71 87 0 8 0 pvpl 32 14773 0 0 120 0 120 120 0 265 0 pmappl 256 645 0 614 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 287 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(ffffffff83976ff0) 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(ffffffff83b2d700) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b2d700) at __mp_lock+0x199 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83b2d700,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369 softclock_thread_run(ffffffff839c02c8) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000fffff228) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff83976ff0) 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(ffffffff83b2d700) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83b2d700) at __mp_lock+0x199 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff83b2d700,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 sleep_finish(ffffffffffffffff,1) at sleep_finish+0x2d8 sys/kern/kern_synch.c:369 softclock_thread_run(ffffffff839c02c8) at softclock_thread_run+0x79 sys/kern/kern_timeout.c:836 softclock_thread(ffff8000fffff228) at softclock_thread+0x10a sys/kern/kern_timeout.c:858 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7df3e60d6500, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7df3e60d6500, count: -1