uvm_fault(0xfffffd807efffcf0, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi TID PID UID PRFLAGS PFLAGS CPU COMMAND * 62107 65881 32767 0x10 0x4000000 0K syz-executor.0 30538 65881 32767 0x10 0x4000000 1 syz-executor.0 uvm_fault_lower(ffff800022a926e0,ffff800022a92718,ffff800022a92660,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffcf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800022a92870,200000c0) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022a92870) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x5e syscall(ffff800022a92b10) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022a92b10) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2be165f300, count: 7 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd807efffcf0, 0x0, 0, 1) -> e ddb{0}> trace uvm_fault_lower(ffff800022a926e0,ffff800022a92718,ffff800022a92660,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffcf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800022a92870,200000c0) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022a92870) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x5e syscall(ffff800022a92b10) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022a92b10) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2be165f300, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800022a925d0 rbx 0 rdx 0 rcx 0xfffffd80033c0460 rax 0xffff8000ffff4fc0 r8 0xffffffff81b80722 setrunnable+0xa2 r9 0x5 r10 0xeef3a3f23a8f1812 r11 0xbf8c3bcd742725d r12 0xffff800022a926e0 r13 0xfffffd80683336a0 r14 0 r15 0xffffffff81b25d00 uvn_flush+0x950 rip 0xffffffff817b9101 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800022a92540 ss 0 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{0}> show proc PROC (syz-executor.0) pid=62107 stat=onproc flags process=10 proc=4000000 pri=36, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff5ce0,0xffff8000ffff4a90 process=0xffff8000ffff0018 user=0xffff800022a8d000, vmspace=0xfffffd807efffcf0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65881 302500 32656 32767 2 0x10 syz-executor.0 *65881 62107 32656 32767 7 0x4000010 syz-executor.0 65881 231053 32656 32767 2 0x4000010 syz-executor.0 65881 30538 32656 32767 7 0x4000010 syz-executor.0 65881 398240 32656 32767 2 0x4000010 syz-executor.0 30113 336001 59896 32767 2 0x490 syz-executor.1 30113 209999 59896 32767 3 0x4000090 fsleep syz-executor.1 30113 55831 59896 32767 3 0x4000090 fsleep syz-executor.1 30113 184623 59896 32767 3 0x4000090 netcon syz-executor.1 59896 286245 81957 32767 3 0x90 nanoslp syz-executor.1 81957 335050 4537 0 3 0x82 wait syz-executor.1 32656 487492 77875 32767 2 0x490 syz-executor.0 77875 507696 4537 0 3 0x82 wait syz-executor.0 93338 195262 0 0 3 0x14200 bored sosplice 4537 213657 43855 0 3 0x82 thrsleep syz-fuzzer 4537 216140 43855 0 2 0x4000482 syz-fuzzer 4537 210029 43855 0 3 0x4000082 thrsleep syz-fuzzer 4537 332493 43855 0 3 0x4000082 thrsleep syz-fuzzer 4537 285004 43855 0 3 0x4000082 thrsleep syz-fuzzer 4537 100359 43855 0 3 0x4000082 thrsleep syz-fuzzer 4537 26765 43855 0 2 0x4000482 syz-fuzzer 4537 316708 43855 0 3 0x4000082 kqread syz-fuzzer 43855 448076 50469 0 3 0x10008a sigsusp ksh 50469 371757 72978 0 3 0x9a kqread sshd 20585 172493 1 0 3 0x100083 ttyin getty 72978 212645 1 0 3 0x88 kqread sshd 17067 493991 53001 73 3 0x100090 kqread syslogd 53001 196997 1 0 3 0x100082 netio syslogd 66089 194679 1 0 3 0x100080 kqread resolvd 7888 15134 57275 77 3 0x100092 kqread dhcpleased 28751 217446 57275 77 3 0x100092 kqread dhcpleased 57275 421104 1 0 3 0x80 kqread dhcpleased 96301 72547 0 0 3 0x14200 bored smr 18325 25078 0 0 2 0x14200 zerothread 15430 334442 0 0 3 0x14200 aiodoned aiodoned 40489 2738 0 0 3 0x14200 syncer update 19660 472645 0 0 3 0x14200 cleaner cleaner 95652 104541 0 0 3 0x14200 reaper reaper 92374 392488 0 0 3 0x14200 pgdaemon pagedaemon 41899 470977 0 0 3 0x14200 bored viomb 19800 83726 0 0 3 0x40014200 acpi0 acpi0 57399 208185 0 0 3 0x40014200 idle1 29461 367745 0 0 3 0x14200 bored softnet 93154 473689 0 0 3 0x14200 bored systqmp 19862 388365 0 0 3 0x14200 bored systq 57004 262598 0 0 2 0x40014200 softclock 25220 522949 0 0 3 0x40014200 idle0 1 177201 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 65881 (syz-executor.0) thread 0xffff8000ffff4fc0 (62107) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b70b8) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 rw_enter+0x35b sys/kern/kern_rwlock.c:286 #5 uvmfault_relock+0x6f sys/uvm/uvm_fault.c:1801 #6 uvm_fault_lower+0x931 sys/uvm/uvm_fault.c:1288 #7 uvm_fault+0x24f sys/uvm/uvm_fault.c:640 #8 kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 #9 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #10 alltraps_kern_meltdown+0x7b #11 copyout+0x5e #12 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #12 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #13 Xsyscall+0x128 Process 65881 (syz-executor.0) thread 0xffff8000ffff67f0 (30538) exclusive rwlock amaplk r = 0 (0xfffffd8068cf14e0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvm_fault_check+0x3d2 sys/uvm/uvm_fault.c:776 #2 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #3 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #4 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd807efffd08) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 uvmfault_lookup+0xe9 sys/uvm/uvm_fault.c:1745 #2 uvm_fault_check+0x3a sys/uvm/uvm_fault.c:676 #3 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #4 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #5 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #6 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10154 6395K 6416K 78643K 11453 0 pcb 13 12K 14K 78643K 17 0 rtable 114 3K 4K 78643K 4515 0 ifaddr 39 11K 12K 78643K 526 0 sysctl 3 1K 3K 78643K 10 0 counters 44 34K 34K 78643K 182 0 ioctlops 0 0K 2K 78643K 668 0 iov 0 0K 32K 78643K 3758 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1209 76K 76K 78643K 9223 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 3 5K 9K 78643K 308 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 8945 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 33K 78643K 35162 0 sigio 0 0K 0K 78643K 2977 0 proc 56 74K 99K 78643K 4639 0 subproc 26 1K 1K 78643K 923 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2806 0 in_multi 33 2K 2K 78643K 1240 0 ether_multi 1 0K 0K 78643K 161 0 mrt 1 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 2K 78643K 6148 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 324 37K 53K 78643K 462790 0 UVM aobj 131 6K 7K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 877 0 NDP 5 0K 0K 78643K 216 0 temp 76 4195K 4307K 78643K 86823 0 kqueue 12 18K 30K 78643K 2535 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 3092 0 3089 41 40 1 5 0 8 0 rtentry 112 866 0 818 2 0 2 2 0 8 0 unpcb 128 29546 0 29533 292 291 1 9 0 8 0 syncache 296 310 0 310 80 79 1 1 0 8 1 tcpqe 32 130 0 130 35 34 1 1 0 8 1 tcpcb 736 13660 0 13649 504 500 4 31 0 8 2 arp 120 159 0 153 1 0 1 1 0 8 0 ipq 40 134 0 134 20 20 0 1 0 8 0 ipqe 40 1040 0 1040 20 20 0 1 0 8 0 inpcb 304 51360 0 51346 523 517 6 14 0 8 4 rttmr 72 11 0 11 3 3 0 1 0 8 0 ip6q 72 90 0 89 19 18 1 1 0 8 0 ip6af 40 187 0 186 19 18 1 1 0 8 0 nd6 48 257 0 247 1 0 1 1 0 8 0 kcovpl 48 71 0 69 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3756 0 3550 36 23 13 18 0 8 0 art_table 32 3757 0 3550 5 3 2 3 0 8 0 art_node 16 865 0 821 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 8943 0 8933 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 48693 0 47215 94 1 93 93 0 8 0 ffsino 272 48693 0 47215 100 0 100 100 0 8 0 nchpl 144 94350 0 92745 60 0 60 60 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 327274 0 327274 14 13 1 1 0 8 1 percpumem 16 103 0 69 1 0 1 1 0 8 0 scxspl 216 300054 0 300054 65 64 1 8 0 8 1 plimitpl 152 7319 0 7309 1 0 1 1 0 8 0 sigapl 424 35183 0 35149 4 0 4 4 0 8 0 futexpl 64 256095 0 256093 17 16 1 1 0 8 0 knotepl 112 489 0 0 5 2 3 4 0 8 0 kqueuepl 216 13504 0 13467 266 263 3 10 0 8 0 pipepl 336 10187 0 10177 259 255 4 9 0 8 2 fdescpl 496 35168 0 35149 4 1 3 3 0 8 0 filepl 152 264080 0 263973 431 424 7 14 0 8 2 lockfpl 104 21709 0 21706 8 7 1 4 0 8 0 lockfspl 48 4105 0 4102 1 0 1 1 0 8 0 sessionpl 144 86 0 76 1 0 1 1 0 8 0 pgrppl 48 277 0 267 1 0 1 1 0 8 0 ucredpl 96 44293 0 44281 1 0 1 1 0 8 0 zombiepl 144 35149 0 35149 1 0 1 1 0 8 1 processpl 1064 35183 0 35149 4 1 3 3 0 8 0 procpl 672 110990 0 110942 44 38 6 6 0 8 2 sosppl 168 503 0 503 81 80 1 1 0 8 1 sockpl 480 84939 0 84909 1501 1489 12 35 0 8 8 mcl64k 65536 65 0 0 5 2 3 3 0 8 0 mcl16k 16384 41 0 0 5 2 3 3 0 8 0 mcl12k 12288 69 0 0 3 1 2 2 0 8 0 mcl9k 9216 52 0 0 3 1 2 2 0 8 0 mcl8k 8192 57 0 0 5 2 3 3 0 8 0 mcl4k 4096 49 0 0 3 0 3 3 0 8 0 mcl2k2 2112 15 0 0 1 0 1 1 0 8 0 mcl2k 2048 657 0 0 25 12 13 20 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 2413 0 0 124 83 41 124 0 8 0 bufpl 288 63756 0 57431 454 1 453 453 0 8 0 anonpl 24 10637021 0 10624275 610 519 91 106 0 186 0 amapchunkpl 152 1158228 0 1157645 302 279 23 37 0 158 0 amappl16 200 109417 0 109028 622 600 22 34 0 8 1 amappl15 192 3018 0 3013 1 0 1 1 0 8 0 amappl14 184 6815 0 6812 1 0 1 1 0 8 0 amappl13 176 3608 0 3606 1 0 1 1 0 8 0 amappl12 168 9108 0 9106 1 0 1 1 0 8 0 amappl11 160 3157 0 3143 1 0 1 1 0 8 0 amappl10 152 5016 0 5012 1 0 1 1 0 8 0 amappl9 144 2919 0 2913 1 0 1 1 0 8 0 amappl8 136 5247 0 5114 7 2 5 5 0 8 0 amappl7 128 3733 0 3725 1 0 1 1 0 8 0 amappl6 120 3038 0 3023 1 0 1 1 0 8 0 amappl5 112 33280 0 33260 1 0 1 1 0 8 0 amappl4 104 8653 0 8626 1 0 1 1 0 8 0 amappl3 96 13027 0 13011 1 0 1 1 0 8 0 amappl2 88 43640 0 43592 5 3 2 2 0 8 0 amappl1 80 623719 0 623269 12 2 10 12 0 8 0 amappl 88 460081 0 459900 6 1 5 5 0 92 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 35168 0 35149 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 35168 0 35149 1 0 1 1 0 8 0 vmmpekpl 168 279240 0 279213 2 0 2 2 0 8 0 vmmpepl 168 3294777 0 3292908 703 615 88 103 0 357 0 vmsppl 368 35167 0 35149 2 0 2 2 0 8 0 rwobjpl 56 823273 0 815993 217 113 104 106 0 8 0 pdppl 4096 70344 0 70298 75 29 46 50 0 8 0 pvpl 32 17316154 0 17299615 1130 983 147 205 0 265 0 pmappl 248 35167 0 35149 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1712 0 925 27 1 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace uvm_fault_lower(ffff800022a926e0,ffff800022a92718,ffff800022a92660,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efffcf0,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800022a92870,200000c0) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022a92870) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x5e syscall(ffff800022a92b10) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022a92b10) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2be165f300, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x5f sys/dev/kcov.c:149 uvm_fault(fffffd807efffcf0,2c136f2000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff800022aac960,2c136f2ef8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800022aac960) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: 7 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x5f sys/dev/kcov.c:149 uvm_fault(fffffd807efffcf0,2c136f2000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff800022aac960,2c136f2ef8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800022aac960) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -8