uvm_fault(0xfffffd80677e5d00, 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 * 72467 40629 0 0 0x4000000 1K syz-executor.0 456302 40629 0 0 0x4000000 0 syz-executor.0 uvm_fault_lower(ffff80002471ff00,ffff80002471ff38,ffff80002471fe80,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd80677e5d00,20000000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800024720090,20000240) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800024720090) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 syscall(ffff800024720330) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800024720330) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaf49e579db0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd80677e5d00, 0x0, 0, 1) -> e ddb{1}> trace uvm_fault_lower(ffff80002471ff00,ffff80002471ff38,ffff80002471fe80,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd80677e5d00,20000000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800024720090,20000240) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800024720090) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 syscall(ffff800024720330) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800024720330) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaf49e579db0, count: -8 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002471fdf0 rbx 0 rdx 0 rcx 0x8 rax 0xffff8000fffe7ce8 r8 0xffffffff81da849e witness_assert+0x1fe r9 0x5 r10 0x94bf2bfb9310e7ed r11 0x3fcea33b0211780d r12 0xffff80002471ff00 r13 0xfffffd8067510420 r14 0 r15 0xffffffff81491a00 uvn_flush+0x8e0 rip 0xffffffff819e07c1 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002471fd60 ss 0x10 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{1}> show proc PROC (syz-executor.0) pid=72467 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffe67e8,0xffff8000fffe77b8 process=0xffff8000fffe94e0 user=0xffff80002471b000, vmspace=0xfffffd80677e5d00 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10499 373847 89539 0 2 0 syz-executor.1 40629 254248 87092 0 2 0 syz-executor.0 *40629 72467 87092 0 7 0x4000000 syz-executor.0 40629 456302 87092 0 7 0x4000000 syz-executor.0 40629 397277 87092 0 2 0x4000000 syz-executor.0 22223 238265 0 0 3 0x14280 nfsidl nfsio 2856 496839 0 0 3 0x14280 nfsidl nfsio 32331 33306 0 0 3 0x14280 nfsidl nfsio 53686 522300 0 0 3 0x14280 nfsidl nfsio 51271 466312 0 0 3 0x14280 nfsidl nfsio 6328 207174 0 0 3 0x14280 nfsidl nfsio 67643 5615 0 0 3 0x14280 nfsidl nfsio 7063 417711 0 0 3 0x14280 nfsidl nfsio 22242 442037 0 0 3 0x14280 nfsidl nfsio 82369 106777 0 0 3 0x14280 nfsidl nfsio 79053 3141 0 0 3 0x14280 nfsidl nfsio 27855 191751 0 0 3 0x14280 nfsidl nfsio 43222 120582 0 0 3 0x14280 nfsidl nfsio 60882 217785 0 0 3 0x14280 nfsidl nfsio 15931 350035 0 0 3 0x14280 nfsidl nfsio 63193 244820 0 0 3 0x14280 nfsidl nfsio 50069 147519 0 0 3 0x14280 nfsidl nfsio 29086 446644 0 0 3 0x14280 nfsidl nfsio 32413 423502 0 0 3 0x14280 nfsidl nfsio 18305 284669 0 0 3 0x14280 nfsidl nfsio 89539 152406 21561 0 3 0x82 nanoslp syz-executor.1 87092 425171 21561 0 3 0x82 nanoslp syz-executor.0 21561 28041 63366 0 3 0x82 thrsleep syz-fuzzer 21561 186871 63366 0 3 0x4000082 nanoslp syz-fuzzer 21561 126744 63366 0 3 0x4000082 kqread syz-fuzzer 21561 503493 63366 0 3 0x4000082 thrsleep syz-fuzzer 21561 44623 63366 0 3 0x4000082 thrsleep syz-fuzzer 21561 189846 63366 0 3 0x4000082 nanoslp syz-fuzzer 21561 58995 63366 0 3 0x4000082 thrsleep syz-fuzzer 21561 331322 63366 0 3 0x4000082 thrsleep syz-fuzzer 63366 318118 33436 0 3 0x10008a sigsusp ksh 33436 22587 86845 0 3 0x9a kqread sshd 93855 196160 1 0 3 0x100083 ttyin getty 86845 371501 1 0 3 0x88 kqread sshd 52548 407320 90206 74 3 0x100092 bpf pflogd 90206 473853 1 0 3 0x80 netio pflogd 27600 379306 79955 73 3 0x100090 kqread syslogd 79955 11438 1 0 3 0x100082 netio syslogd 44382 450948 1 0 3 0x100080 kqread resolvd 1592 152024 26409 77 3 0x100092 kqread dhcpleased 27046 310267 26409 77 3 0x100092 kqread dhcpleased 26409 519782 1 0 3 0x80 kqread dhcpleased 5514 423032 0 0 3 0x14200 bored smr 36835 243094 0 0 2 0x14200 zerothread 97710 392835 0 0 3 0x14200 aiodoned aiodoned 7292 254949 0 0 3 0x14200 syncer update 58219 104830 0 0 3 0x14200 cleaner cleaner 86833 84636 0 0 3 0x14200 reaper reaper 57582 85603 0 0 3 0x14200 pgdaemon pagedaemon 26255 393895 0 0 3 0x14200 bored viomb 89770 126922 0 0 3 0x40014200 acpi0 acpi0 52177 293026 0 0 3 0x40014200 idle1 70063 495388 0 0 3 0x14200 bored softnet 86299 433419 0 0 3 0x14200 bored systqmp 76423 86820 0 0 3 0x14200 bored systq 14706 403520 0 0 3 0x40014200 bored softclock 10562 486229 0 0 3 0x40014200 idle0 1 417871 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 40629 (syz-executor.0) thread 0xffff8000fffe7ce8 (72467) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829f2050) #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+0x233 sys/uvm/uvm_fault.c:639 #2 kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 #3 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #4 alltraps_kern_meltdown+0x7b #5 copyin+0x53 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 Process 40629 (syz-executor.0) thread 0xffff8000fffe6008 (456302) exclusive rwlock amaplk r = 0 (0xfffffd8065c60390) #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 (0xfffffd80677e5d18) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10130 6473K 6855K 78643K 11851 0 pcb 13 11K 12K 78643K 148 0 rtable 83 2K 6K 78643K 345 0 ifaddr 43 10K 12K 78643K 130 0 counters 44 34K 34K 78643K 72 0 ioctlops 0 0K 4K 78643K 1508 0 iov 0 0K 12K 78643K 49 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1213 76K 77K 78643K 1426 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 33 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 6 17K 25K 78643K 562 0 proc 70 87K 99K 78643K 455 0 subproc 26 1K 1K 78643K 78 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 13 0 in_multi 26 1K 2K 78643K 97 0 ether_multi 1 0K 0K 78643K 5 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 2K 78643K 623 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 235 80K 93K 78643K 8858 0 UVM aobj 47 2K 2K 78643K 47 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 18 0 NDP 6 0K 0K 78643K 34 0 temp 81 4196K 4260K 78643K 4161 0 kqueue 12 18K 22K 78643K 34 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 120 143 0 140 3 1 2 3 0 8 1 rtentry 112 99 0 67 2 0 2 2 0 8 0 unpcb 128 596 0 581 11 7 4 7 0 8 3 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpqe 32 145 0 145 1 1 0 1 0 8 0 tcpcb 736 117 0 107 7 5 2 7 0 8 0 arp 120 14 0 8 1 0 1 1 0 8 0 inpcb 304 509 0 502 8 3 5 6 0 8 4 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 20 0 16 1 0 1 1 0 8 0 kcovpl 48 6 0 4 1 0 1 1 0 8 0 pffrag 232 18 0 17 1 0 1 1 0 482 0 pffrnode 88 18 0 17 1 0 1 1 0 8 0 pffrent 40 35 0 34 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 14 0 14 1 1 0 1 0 8 0 pfstitem 24 31 0 6 1 0 1 1 0 8 0 pfstkey 112 31 0 6 1 0 1 1 0 8 0 pfstate 320 31 0 6 3 0 3 3 0 8 0 pfrule 1360 25 0 19 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 418 0 284 13 0 13 13 0 8 1 art_table 32 419 0 284 2 0 2 2 0 8 0 art_node 16 98 0 71 1 0 1 1 0 8 0 sysvmsgpl 40 39 0 9 1 0 1 1 0 8 0 semupl 112 8 0 8 1 1 0 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 44 0 0 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2153 0 742 89 0 89 89 0 8 0 ffsino 272 2153 0 742 95 0 95 95 0 8 0 nchpl 144 3068 0 1461 61 0 61 61 0 8 0 uvmvnodes 80 2304 0 0 48 0 48 48 0 8 0 vnodes 224 2304 0 0 136 0 136 136 0 8 0 namei 1024 9592 0 9592 1 0 1 1 0 8 1 percpumem 16 48 0 14 1 0 1 1 0 8 0 vcpupl 2048 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 4 0 4 1 1 0 1 0 8 0 scxspl 216 9002 0 9002 9 8 1 8 0 8 1 plimitpl 152 235 0 226 1 0 1 1 0 8 0 sigapl 424 819 0 766 6 0 6 6 0 8 0 futexpl 64 3295 0 3295 1 0 1 1 0 8 1 knotepl 112 64 0 0 2 0 2 2 0 8 0 kqueuepl 216 65 0 57 1 0 1 1 0 8 0 pipepl 336 133 0 123 2 1 1 2 0 8 0 fdescpl 496 785 0 766 3 0 3 3 0 8 0 filepl 152 4887 0 4778 18 7 11 14 0 8 6 lockfpl 104 199 0 197 1 0 1 1 0 8 0 lockfspl 48 32 0 30 1 0 1 1 0 8 0 sessionpl 144 22 0 11 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 399 0 387 1 0 1 1 0 8 0 zombiepl 144 766 0 766 1 0 1 1 0 8 1 processpl 1064 819 0 766 4 0 4 4 0 8 0 procpl 672 1881 0 1818 9 2 7 7 0 8 1 srpgc 96 6 0 6 1 1 0 1 0 8 0 sockpl 480 1251 0 1226 49 38 11 28 0 8 7 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 11 0 0 2 0 2 2 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 185 0 0 23 0 23 23 0 8 0 mtagpl 96 35 0 0 1 0 1 1 0 8 0 mbufpl 256 323 0 0 19 0 19 19 0 8 0 bufpl 288 4211 0 175 289 0 289 289 0 8 0 anonpl 24 230395 0 212674 136 5 131 134 0 186 21 amapchunkpl 152 22321 0 21607 37 8 29 35 0 158 0 amappl16 200 3650 0 3103 45 11 34 38 0 8 5 amappl15 192 104 0 98 1 0 1 1 0 8 0 amappl14 184 3 0 2 1 0 1 1 0 8 0 amappl13 176 56 0 55 1 0 1 1 0 8 0 amappl12 168 164 0 161 1 0 1 1 0 8 0 amappl11 160 73 0 54 1 0 1 1 0 8 0 amappl10 152 228 0 223 1 0 1 1 0 8 0 amappl9 144 370 0 367 1 0 1 1 0 8 0 amappl8 136 423 0 389 2 0 2 2 0 8 0 amappl7 128 71 0 63 1 0 1 1 0 8 0 amappl6 120 201 0 192 1 0 1 1 0 8 0 amappl5 112 911 0 888 1 0 1 1 0 8 0 amappl4 104 673 0 647 1 0 1 1 0 8 0 amappl3 96 368 0 347 1 0 1 1 0 8 0 amappl2 88 922 0 880 2 1 1 2 0 8 0 amappl1 80 16927 0 16474 13 3 10 13 0 8 0 amappl 88 8470 0 8291 5 0 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 46 0 0 1 0 1 1 0 8 0 uaddrrnd 24 789 0 766 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 789 0 766 1 0 1 1 0 8 0 vmmpekpl 168 10099 0 10074 2 0 2 2 0 8 0 vmmpepl 168 78247 0 76375 111 15 96 101 0 357 14 vmsppl 368 788 0 766 3 0 3 3 0 8 0 rwobjpl 56 24204 0 20519 53 0 53 53 0 8 1 pdppl 4096 1586 0 1536 63 13 50 51 0 8 0 pvpl 32 451049 0 429798 209 5 204 208 0 265 30 pmappl 248 788 0 766 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 620 0 21 18 0 18 18 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff8277fff0) 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 __mp_lock(ffffffff829f1e48) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829f1e48) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd80677e5d00,af4daa2a000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff80002472c500,af4daa2a398) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002472c500) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff8277fff0) 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 __mp_lock(ffffffff829f1e48) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff829f1e48) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd80677e5d00,af4daa2a000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff80002472c500,af4daa2a398) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002472c500) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi uvm_fault_lower(ffff80002471ff00,ffff80002471ff38,ffff80002471fe80,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd80677e5d00,20000000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800024720090,20000240) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800024720090) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 syscall(ffff800024720330) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800024720330) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaf49e579db0, count: 7 ddb{1}> trace uvm_fault_lower(ffff80002471ff00,ffff80002471ff38,ffff80002471fe80,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd80677e5d00,20000000,0,1) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800024720090,20000240) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800024720090) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x53 syscall(ffff800024720330) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800024720330) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaf49e579db0, count: -8