uvm_fault(0xfffffd806b9a47b8, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82392f98 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c449490 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82392f98 Starting stack trace... panic(ffffffff833b5644) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c4493e0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001481000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,2,2000,ffff8000fffeaa80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff8000fffeaa80) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c449590) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8067e1f6d0,2,fffffd80097fb5b0,ffff8000fffeaa80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806183d128,ffff8000fffeaa80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806183d128,ffff8000fffeaa80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806183d128,ffff8000fffeaa80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806183d128,ffff8000fffeaa80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeaa80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeaa80,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeaa80,ffff80003c449900,ffff80003c449850) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c449900) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c449900) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fadc9b7a880, 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 *282074 91106 0 0 0 1 syz-executor 237328 98767 0 0x14000 0x200 0 systqmp proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x746e5a45fb90, 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(0xfffffd806b9a47b8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x746e5a45fb90, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800035be8c20 rbx 0 rdx 0 rcx 0xffff8000fffeafb0 rax 0x2a r8 0xffff800035be8b50 r9 0x1 r10 0xb9b0518c858aef08 r11 0xfeb5189d8e60f73 r12 0 r13 0xffffffff82c9ce58 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff821454c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800035be8ba0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=282074 pid=91106 tcnt=3 stat=onproc flags process=0 proc=0 runpri=83, usrpri=84, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003ac0e558,0xffff8000fffeb258 process=0xffff8000fffe66a0 user=0xffff800035be3000, vmspace=0xfffffd806b9a45d0 estcpu=34, cpticks=8, pctcpu=0.0, user=5, sys=3, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *91106 282074 73417 0 7 0 syz-executor 91106 33812 73417 0 3 0x4000000 smrbar syz-executor 91106 270310 73417 0 3 0x4000080 sbwait syz-executor 37223 462938 37428 0 3 0x80 nanoslp syz-executor 37223 151463 37428 0 3 0x4000080 sbwait syz-executor 37223 356678 37428 0 3 0x4000080 fsleep syz-executor 8316 171004 81192 0 3 0x80 nanoslp syz-executor 8316 139453 81192 0 3 0x4000080 kqsel syz-executor 8316 235345 81192 0 3 0x4000080 fsleep syz-executor 36070 450634 5043 60929 3 0x90 nanoslp syz-executor 36070 84503 5043 60929 3 0x4000090 sbwait syz-executor 36070 218144 5043 60929 3 0x4000090 fsleep syz-executor 36070 318202 5043 60929 3 0x4000090 fsleep syz-executor 59160 22190 75888 0 3 0x90 nanoslp syz-executor 59160 392365 75888 0 3 0x4000090 kqread syz-executor 59160 418380 75888 0 3 0x4000090 fsleep syz-executor 81192 442826 36503 0 3 0x82 nanoslp syz-executor 75888 259009 36503 0 3 0x82 nanoslp syz-executor 73417 301136 36503 0 3 0x82 nanoslp syz-executor 21427 194004 0 0 3 0x14200 bored sosplice 65681 454760 36503 0 3 0x82 nanoslp syz-executor 5043 334173 36503 0 3 0x82 nanoslp syz-executor 25366 399743 36503 0 3 0x82 nanoslp syz-executor 45893 325197 36503 0 3 0x82 nanoslp syz-executor 37428 372244 36503 0 3 0x82 nanoslp syz-executor 36503 517200 72976 0 3 0x82 kqread syz-executor 72976 114845 77209 0 3 0x10008a sigsusp ksh 77209 137612 92883 0 3 0x98 kqread sshd-session 92883 297846 92449 0 3 0x92 kqread sshd-session 88779 253450 1 0 3 0x100083 ttyopn getty 92449 81618 1 0 3 0x88 kqread sshd 57713 239264 47397 74 3 0x1100092 bpf pflogd 47397 479715 1 0 3 0x80 sbwait pflogd 19456 197092 74520 73 3 0x1100090 kqread syslogd 74520 183220 1 0 3 0x100082 sbwait syslogd 51340 402980 1 0 3 0x100080 kqread resolvd 60708 308224 95356 77 3 0x100092 kqread dhcpleased 56713 321032 95356 77 3 0x100092 kqread dhcpleased 95356 217010 1 0 3 0x80 kqread dhcpleased 8449 505494 0 0 3 0x14200 bored smr 99355 358431 0 0 2 0x14200 zerothread 68518 329607 0 0 3 0x14200 aiodoned aiodoned 37147 25839 0 0 3 0x14200 syncer update 67510 99283 0 0 3 0x14200 cleaner cleaner 44575 346250 0 0 2 0x14200 reaper 15452 77521 0 0 3 0x14200 pgdaemon pagedaemon 99401 480362 0 0 3 0x14200 bored viomb 9511 224180 0 0 3 0x40014200 acpi0 acpi0 21403 267356 0 0 3 0x40014200 idle1 84974 149947 0 0 3 0x14200 bored softnet1 55436 397123 0 0 3 0x14200 bored softnet0 98767 237328 0 0 7 0x14200 systqmp 51832 157127 0 0 3 0x14200 bored systq 58513 140359 0 0 3 0x14200 tmoslp softclockmp 57829 182161 0 0 3 0x40014200 tmoslp softclock 55842 513597 0 0 3 0x40014200 idle0 1 446225 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806b74b910) #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 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #4 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #6 exit1+0x6fc sys/kern/kern_exit.c:260 #7 sys_exit+0x1a sys/kern/kern_exit.c:-1 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 91106 (syz-executor) thread 0xffff8000fffeb248 (33812) exclusive rwlock clonelk r = 0 (0xffffffff83878e98) #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 if_clone_destroy+0x67 sys/net/if.c:-1 #3 ifioctl+0x59d sys/net/if.c:2092 #4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #6 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10246 11260K 11447K 166960K 13475 0 pcb 19 14K 15K 166960K 303 0 rtable 242 13K 14K 166960K 628 0 pf 41 19K 19K 166960K 207 0 ifaddr 44 8K 8K 166960K 152 0 ifgroup 62 2K 3K 166960K 259 0 sysctl 4 1K 9K 166960K 17 0 counters 70 37K 38K 166960K 340 0 ioctlops 0 0K 8K 166960K 1797 0 iov 0 0K 36K 166960K 132 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1425 90K 90K 166960K 2959 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 616K 620K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 64 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1985 0 sigio 0 0K 0K 166960K 194 0 proc 72 115K 164K 166960K 917 0 subproc 72 4K 4K 166960K 138 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 279 0 in_multi 97 7K 7K 166960K 245 0 ether_multi 1 0K 0K 166960K 26 0 mrt 4 0K 0K 166960K 25 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 175 784K 784K 166960K 175 0 exec 0 0K 1K 166960K 664 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 249 161K 191K 166960K 18633 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 42 84K 102K 166960K 3213 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 1K 166960K 168 0 NDP 15 0K 2K 166960K 109 0 temp 81 8656K 8732K 166960K 89561 0 kqueue 16 26K 32K 166960K 337 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 120 158 0 154 1 0 1 1 0 8 0 rtentry 176 205 0 113 5 0 5 5 0 8 0 unpcb 144 1467 0 1442 16 10 6 6 0 8 4 syncache 336 9 0 9 2 2 0 1 0 8 0 tcpqe 32 7 0 7 2 2 0 1 0 8 0 tcpcb 736 573 0 563 13 11 2 7 0 8 0 arp 136 22 0 11 1 0 1 1 0 8 0 inpcb 328 1894 0 1874 25 21 4 12 0 8 2 nd6 152 38 0 17 1 0 1 1 0 8 0 pkpcb 40 11 0 11 6 5 1 1 0 8 1 kcovpl 48 15 0 7 1 0 1 1 0 8 0 mppekey 1024 3 0 3 3 3 0 1 0 8 0 ppxss 1192 111 0 111 5 4 1 1 0 8 1 pppxif 1504 42 0 42 7 6 1 1 0 8 1 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 24 0 18 1 0 1 1 0 482 0 pffrnode 88 21 0 15 1 0 1 1 0 8 0 pffrent 40 47 0 41 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 pfrktable 1344 2 0 2 2 2 0 1 0 8 0 pfstitem 24 129 0 55 1 0 1 1 0 8 0 pfstkey 128 135 0 61 3 0 3 3 0 8 0 pfstate 384 131 0 58 8 0 8 8 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 rttmr 136 6 0 6 4 4 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1048 0 614 33 5 28 28 0 8 0 art_table 40 1053 0 614 5 0 5 5 0 8 0 art_node 32 203 0 125 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 62 0 52 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 38 0 21 3 0 3 3 0 8 0 dino2pl 256 4988 0 3472 96 0 96 96 0 8 0 ffsino 296 4988 0 3472 118 0 118 118 0 8 0 nchpl 144 7498 0 5787 64 0 64 64 0 8 0 rtmask 32 10 0 10 5 4 1 1 0 8 1 vnodes 216 5899 0 0 328 0 328 328 0 8 0 namei 1024 26302 0 26302 6 5 1 2 0 8 1 percpumem 16 185 0 135 1 0 1 1 0 8 0 kstatmem 264 162 0 132 3 0 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 8 0 8 5 5 0 1 0 8 0 scxspl 216 82213 0 82213 12 10 2 8 1 8 2 plimitpl 152 523 0 506 1 0 1 1 0 8 0 sigapl 424 2227 0 2178 8 2 6 7 0 8 0 knotepl 120 560 0 0 17 0 17 17 0 8 0 kqueuepl 224 740 0 727 9 8 1 5 0 8 0 pipepl 344 417 0 390 14 11 3 8 0 8 0 fdescpl 528 2203 0 2172 3 0 3 3 0 8 0 filepl 160 14372 0 14137 38 23 15 20 0 8 4 lockfpl 104 677 0 675 2 1 1 2 0 8 0 lockfspl 48 207 0 205 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 68 0 51 1 0 1 1 0 8 0 ucredpl 104 2416 0 2399 1 0 1 1 0 8 0 zombiepl 144 2282 0 2279 1 0 1 1 0 8 0 processpl 1232 2227 0 2178 6 2 4 5 0 8 0 procpl 664 5015 0 4955 6 0 6 6 0 8 0 sosppl 168 11 0 11 5 5 0 1 0 8 0 sockpl 752 3593 0 3544 54 41 13 18 0 8 7 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 49 0 0 4 0 4 4 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 1168 0 0 73 0 73 73 0 8 0 bufpl 280 36294 0 30151 441 1 440 440 0 8 0 anonpl 32 12489 0 0 101 0 101 101 0 246 0 amapchunkpl 152 62528 0 62005 51 28 23 30 0 158 1 amappl16 200 10668 0 10634 67 52 15 30 0 8 4 amappl15 192 44 0 44 2 2 0 1 0 8 0 amappl14 184 132 0 120 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 2963 0 2932 4 1 3 3 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 3 0 3 1 1 0 1 0 8 0 amappl9 144 256 0 256 2 2 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 127 0 115 1 0 1 1 0 8 0 amappl6 120 246 0 242 1 0 1 1 0 8 0 amappl5 112 159 0 148 1 0 1 1 0 8 0 amappl4 104 321 0 301 1 0 1 1 0 8 0 amappl3 96 12907 0 12787 5 1 4 4 0 8 0 amappl2 88 774 0 712 2 0 2 2 0 8 0 amappl1 80 16725 0 16119 15 0 15 15 0 8 0 amappl 88 17548 0 17372 5 0 5 5 0 92 0 uvmvnodes 80 5899 0 0 121 0 121 121 0 8 0 dma16384 16384 1 0 1 1 0 1 1 0 8 1 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 7 0 7 2 2 0 1 0 8 0 dma128 128 257 0 257 4 4 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2203 0 2172 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2203 0 2172 1 0 1 1 0 8 0 vmmpekpl 168 17896 0 17841 3 0 3 3 0 8 0 vmmpepl 168 145309 0 143293 134 32 102 112 0 357 3 vmsppl 488 2202 0 2171 7 2 5 5 0 8 0 rwobjpl 80 46540 0 39676 145 4 141 141 0 8 0 pdppl 4096 4414 0 4342 108 34 74 84 0 8 2 pvpl 32 20737 0 0 167 0 167 167 0 265 0 pmappl 256 2202 0 2171 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 372 0 63 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837a1ff0) 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_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 taskq_next_work(ffffffff837bc650,ffff80002a21ad08) at taskq_next_work+0xa5 sys/kern/kern_task.c:400 taskq_thread(ffffffff837bc650) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 end trace frame: 0x0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff837a1ff0) 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_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 taskq_next_work(ffffffff837bc650,ffff80002a21ad08) at taskq_next_work+0xa5 sys/kern/kern_task.c:400 taskq_thread(ffffffff837bc650) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 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: 0x746e5a45fb90, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x746e5a45fb90, count: -1