uvm_fault(0xfffffd807182c200, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff822bd948 cs 8 rflags 10246 cr2 0 cpl 0 rsp ffff80002a3cbf90 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff822bd948 Starting stack trace... panic(ffffffff833b5ec7) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a3cbee0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000157f000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,2,2000,ffff80003c426030) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff80003c426030) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80002a3cc090) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805f51a100,2,fffffd80097fb3a8,ffff80003c426030) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806ffb28d8,ffff80003c426030) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806ffb28d8,ffff80003c426030) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806ffb28d8,ffff80003c426030) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806ffb28d8,ffff80003c426030) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80003c426030) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80003c426030,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003c426030,ffff80002a3cc400,ffff80002a3cc350) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3cc400) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3cc400) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x707c9766cd10, count: 242 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 *454627 67982 0 0 0 1 syz-executor 374507 68593 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70ef7f99eac0, 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(0xfffffd807182c200, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70ef7f99eac0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a3c0a10 rbx 0 rdx 0 rcx 0xffff800034fe5790 rax 0x2a r8 0xffff80002a3c0940 r9 0x1 r10 0xda18d62b36486232 r11 0xa27c700f99267400 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81dcb4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a3c0990 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=454627 pid=67982 tcnt=2 stat=onproc flags process=0 proc=0 runpri=83, usrpri=83, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c426030,0xffff800034fe4fd8 process=0xffff80003c4761e8 user=0xffff80002a3bb000, vmspace=0xfffffd807182c7b8 estcpu=33, cpticks=1, pctcpu=0.1, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *67982 454627 28260 0 7 0 syz-executor 67982 497969 28260 0 3 0x4000080 fsleep syz-executor 22963 188124 8571 0 3 0x80 nanoslp syz-executor 22963 59719 8571 0 3 0x4000080 kqsel syz-executor 22963 208227 8571 0 3 0x4000080 fsleep syz-executor 95039 38460 33070 0 3 0x80 nanoslp syz-executor 95039 25628 33070 0 3 0x4000080 fsleep syz-executor 95039 132450 33070 0 3 0x4000080 kqread syz-executor 36981 173974 14477 0 3 0x80 nanoslp syz-executor 36981 64712 14477 0 3 0x4000080 kqsel syz-executor 36981 311196 14477 0 3 0x4000080 fsleep syz-executor 84602 178610 0 0 3 0x14200 acct acct 28260 320554 6303 0 3 0x82 nanoslp syz-executor 15407 289603 6303 0 3 0x82 nanoslp syz-executor 14477 254183 6303 0 2 0x2 syz-executor 33070 506515 6303 0 3 0x82 nanoslp syz-executor 7527 124303 6303 0 3 0x82 wait syz-executor 39177 372502 6303 0 2 0x2 syz-executor 58835 315846 48075 0 3 0x82 sbwait sshd-session 8571 4144 6303 0 3 0x82 nanoslp syz-executor 26147 20318 6303 0 3 0x2 biowait syz-executor 58510 113857 1 0 3 0x100083 ttyopn getty 74479 502342 0 0 3 0x14200 bored sosplice 6303 289683 40280 0 3 0x82 kqread syz-executor 40280 82316 58866 0 3 0x10008a sigsusp ksh 58866 404759 38642 0 3 0x98 kqread sshd-session 38642 106768 48075 0 3 0x92 kqread sshd-session 48075 112172 1 0 3 0x88 kqread sshd 40334 63518 76761 74 3 0x1100092 bpf pflogd 76761 96750 1 0 3 0x80 sbwait pflogd 65068 93163 50015 73 3 0x1100090 kqread syslogd 50015 40218 1 0 3 0x100082 sbwait syslogd 73817 175939 1 0 3 0x100080 kqread resolvd 68388 174797 0 0 3 0x14200 bored smr 14374 313451 0 0 3 0x14200 pgzero zerothread 95237 464668 0 0 3 0x14200 aiodoned aiodoned 27156 502410 0 0 3 0x14200 syncer update 94309 348145 0 0 3 0x14200 cleaner cleaner 68593 374507 0 0 7 0x14200 reaper 60485 384014 0 0 3 0x14200 pgdaemon pagedaemon 75093 321041 0 0 3 0x14200 bored viomb 43933 439416 0 0 3 0x40014200 acpi0 acpi0 77443 377312 0 0 3 0x40014200 idle1 40119 414304 0 0 3 0x14200 bored softnet1 23748 134175 0 0 3 0x14200 bored softnet0 45936 211096 0 0 2 0x40014200 systqmp 52807 255924 0 0 3 0x14200 bored systq 98412 487009 0 0 3 0x14200 tmoslp softclockmp 46877 414983 0 0 3 0x40014200 tmoslp softclock 94372 377234 0 0 3 0x40014200 idle0 1 451770 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff839d5d58) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 uvm_pmr_freepageq+0x15c sys/uvm/uvm_pmemrange.c:1371 #4 km_free+0x36b sys/uvm/uvm_km.c:827 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1aa sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 Process 39177 (syz-executor) thread 0xffff80003c4262c8 (372502) Process 26147 (syz-executor) thread 0xffff800034fe5a28 (20318) Process 45936 (systqmp) thread 0xffff8000ffffe7c8 (211096) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10259 11196K 12380K 166960K 14673 0 pcb 20 18K 30K 166960K 1605 0 rtable 236 24K 24K 166960K 2197 0 pf 46 19K 67487K 166960K 678 0 ifaddr 36 7K 7K 166960K 371 0 ifgroup 68 2K 3K 166960K 731 0 sysctl 4 1K 9K 166960K 51 0 counters 74 37K 38K 166960K 844 0 ioctlops 0 0K 4K 166960K 2944 0 iov 0 0K 28K 166960K 567 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1511 95K 96K 166960K 5924 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 616K 624K 166960K 104 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 390 0 dirhash 12 2K 2K 166960K 105 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 5964 0 sigio 0 0K 0K 166960K 335 0 proc 66 83K 164K 166960K 1594 0 subproc 72 4K 4K 166960K 239 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 825 0 in_multi 59 4K 7K 166960K 496 0 ether_multi 1 0K 0K 166960K 88 0 mrt 3 0K 0K 166960K 44 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 2022 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 11 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 234 162K 193K 166960K 55031 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 37 74K 102K 166960K 7686 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 374 0 NDP 15 0K 2K 166960K 294 0 temp 89 8656K 8737K 166960K 286803 0 kqueue 9 15K 28K 166960K 1117 0 SYN cache 2 8K 16K 166960K 3 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 120 855 0 854 8 6 2 3 0 8 1 rtentry 176 519 0 446 6 2 4 6 0 8 0 unpcb 144 5837 0 5822 52 47 5 10 0 8 4 syncache 336 36 0 36 8 7 1 1 0 8 1 tcpqe 32 10 0 10 7 7 0 1 0 8 0 tcpcb 736 2650 0 2641 42 40 2 10 0 8 1 arp 136 77 0 61 1 0 1 1 0 8 0 inpcb 328 7474 0 7460 65 61 4 12 0 8 2 nd6 152 98 0 82 2 1 1 2 0 8 0 pkpcb 40 77 0 77 4 3 1 1 0 8 1 kcovpl 48 26 0 18 1 0 1 1 0 8 0 mppekey 1024 4 0 4 3 3 0 1 0 8 0 ppxss 1192 296 0 296 6 5 1 1 0 8 1 pppxif 1504 26 0 26 9 8 1 1 0 8 1 pfstscr 40 11 0 9 1 0 1 1 0 8 0 pffrag 232 42 0 31 1 0 1 1 0 482 0 pffrnode 88 36 0 28 1 0 1 1 0 8 0 pffrent 40 71 0 60 1 0 1 1 0 8 0 pfosfp 40 1430 0 1006 5 0 5 5 0 8 0 pfosfpen 112 1430 0 715 21 0 21 21 0 8 0 pfrktable 1344 2 0 2 2 2 0 1 0 8 0 pfanchor 1288 6 0 0 1 0 1 1 0 8 0 pftag 88 5 0 0 1 0 1 1 0 8 0 pfstitem 24 366 0 219 1 0 1 1 0 8 0 pfstkey 128 385 0 240 5 0 5 5 0 8 0 pfstate 384 373 0 230 15 0 15 15 0 8 0 pfrule 1344 43 0 37 2 1 1 2 0 8 0 rttmr 136 5 0 5 4 4 0 1 0 8 0 art_heap8 4096 9 0 5 9 5 4 6 0 8 0 art_heap4 256 1737 0 1424 43 23 20 29 0 8 0 art_table 40 1746 0 1429 5 0 5 5 0 8 0 art_node 32 506 0 443 1 0 1 1 0 8 0 sysvmsgpl 40 49 0 46 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 381 0 371 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 81 0 64 3 0 3 3 0 8 0 dino2pl 256 12904 0 11357 98 0 98 98 0 8 0 ffsino 296 12904 0 11357 121 1 120 120 0 8 0 nchpl 144 21330 0 20684 66 41 25 64 0 8 0 rtmask 32 53 0 53 9 8 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 77256 0 77254 10 8 2 2 0 8 1 percpumem 16 437 0 385 1 0 1 1 0 8 0 kstatmem 264 486 0 450 3 0 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 19 0 19 7 7 0 1 0 8 0 scxspl 216 181597 0 181596 19 17 2 8 1 8 1 plimitpl 152 1945 0 1927 1 0 1 1 0 8 0 sigapl 424 6329 0 6283 9 2 7 8 0 8 0 knotepl 120 1106 0 0 33 0 33 33 0 8 0 kqueuepl 224 2556 0 2543 25 24 1 7 0 8 0 pipepl 344 847 0 820 20 17 3 9 0 8 0 fdescpl 528 6197 0 6169 3 0 3 3 0 8 0 filepl 160 48252 0 48032 64 49 15 20 0 8 1 lockfpl 104 2795 0 2793 5 4 1 2 0 8 0 lockfspl 48 782 0 780 1 0 1 1 0 8 0 sessionpl 144 73 0 64 1 0 1 1 0 8 0 pgrppl 48 231 0 214 1 0 1 1 0 8 0 ucredpl 104 8284 0 8274 1 0 1 1 0 8 0 zombiepl 144 6891 0 6889 2 1 1 1 0 8 0 processpl 1232 6329 0 6283 8 3 5 6 0 8 0 procpl 664 16096 0 16043 9 3 6 8 0 8 0 sosppl 168 33 0 33 10 9 1 1 0 8 1 sockpl 752 14537 0 14504 154 143 11 27 0 8 7 mcl64k 65536 20 0 0 3 0 3 3 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 139 0 0 12 0 12 12 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1193 0 0 71 0 71 71 0 8 0 bufpl 280 80842 0 74705 439 0 439 439 0 8 0 anonpl 32 18254 0 0 147 0 147 147 0 246 0 amapchunkpl 152 195659 0 195118 78 47 31 34 0 158 3 amappl16 200 25730 0 25456 144 106 38 39 0 8 8 amappl15 192 10 0 10 3 3 0 1 0 8 0 amappl14 184 13 0 12 1 0 1 1 0 8 0 amappl13 176 667 0 666 1 0 1 1 0 8 0 amappl12 168 6768 0 6730 3 0 3 3 0 8 0 amappl11 160 7 0 7 4 4 0 1 0 8 0 amappl10 152 52 0 44 1 0 1 1 0 8 0 amappl9 144 249 0 249 2 2 0 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 157 0 155 1 0 1 1 0 8 0 amappl6 120 530 0 518 1 0 1 1 0 8 0 amappl5 112 115 0 105 1 0 1 1 0 8 0 amappl4 104 694 0 667 1 0 1 1 0 8 0 amappl3 96 34441 0 34356 4 1 3 3 0 8 0 amappl2 88 6548 0 6474 2 0 2 2 0 8 0 amappl1 80 43018 0 42440 15 1 14 14 0 8 0 amappl 88 52768 0 52606 5 0 5 5 0 92 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 dma32768 32768 2 0 2 1 1 0 1 0 8 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 dma512 512 2 0 2 2 1 1 1 0 8 1 dma256 256 9 0 9 3 3 0 1 0 8 0 dma128 128 261 0 261 6 6 0 1 0 8 0 dma64 64 41 0 41 4 4 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 6197 0 6169 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6197 0 6169 1 0 1 1 0 8 0 vmmpekpl 168 47724 0 47657 4 0 4 4 0 8 0 vmmpepl 168 408734 0 406699 170 56 114 115 0 357 7 vmsppl 488 6196 0 6169 5 1 4 5 0 8 0 rwobjpl 80 113650 0 106576 166 11 155 155 0 8 1 pdppl 4096 12402 0 12338 150 80 70 86 0 8 6 pvpl 32 25791 0 0 208 1 207 207 0 265 0 pmappl 256 6196 0 6169 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 483 0 173 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f9ff0) 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 __sanitizer_cov_trace_const_cmp4(200,4) at __sanitizer_cov_trace_const_cmp4+0x1e kd_curproc sys/dev/kcov.c:583 [inline] __sanitizer_cov_trace_const_cmp4(200,4) at __sanitizer_cov_trace_const_cmp4+0x1e sys/dev/kcov.c:230 msleep_nsec(ffffffff837c1848,ffffffff837c1810,4,ffffffff83398522,ffffffffffffffff) at msleep_nsec+0x2ab sys/kern/kern_synch.c:207 reaper(ffff8000ffffca68) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff837f9ff0) 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 __sanitizer_cov_trace_const_cmp4(200,4) at __sanitizer_cov_trace_const_cmp4+0x1e kd_curproc sys/dev/kcov.c:583 [inline] __sanitizer_cov_trace_const_cmp4(200,4) at __sanitizer_cov_trace_const_cmp4+0x1e sys/dev/kcov.c:230 msleep_nsec(ffffffff837c1848,ffffffff837c1810,4,ffffffff83398522,ffffffffffffffff) at msleep_nsec+0x2ab sys/kern/kern_synch.c:207 reaper(ffff8000ffffca68) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -6 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: 0x70ef7f99eac0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x70ef7f99eac0, count: -1