uvm_fault(0xfffffd807efff000, 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 * 95604 9232 32767 0x10 0x4000000 0K syz-executor.0 354654 9232 32767 0x10 0x4000000 1 syz-executor.0 uvm_fault_lower(ffff800022aa6f90,ffff800022aa6fc8,ffff800022aa6f10,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff000,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800022aa7120,200003c0) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022aa7120) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff800022aa7360) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022aa7360) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x725d2707da0, 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(0xfffffd807efff000, 0x0, 0, 1) -> e ddb{0}> trace uvm_fault_lower(ffff800022aa6f90,ffff800022aa6fc8,ffff800022aa6f10,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff000,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800022aa7120,200003c0) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022aa7120) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff800022aa7360) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022aa7360) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x725d2707da0, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800022aa6e80 rbx 0 rdx 0 rcx 0xfffffd80033c0e60 rax 0xffff8000ffff4000 r8 0xffffffff81b80722 setrunnable+0xa2 r9 0x5 r10 0x2051e0029af217cd r11 0xbee8ffcd864534e0 r12 0xffff800022aa6f90 r13 0xfffffd807eaea000 r14 0 r15 0x680 rip 0xffffffff817b9101 uvm_fault_lower+0xbb1 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800022aa6df0 ss 0 uvm_fault_lower+0xbb1: movq 0(%rbx),%rdi ddb{0}> show proc PROC (syz-executor.0) pid=95604 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=68, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff57a0,0xffff8000ffff4a90 process=0xffff8000ffff1d30 user=0xffff800022aa2000, vmspace=0xfffffd807efff000 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9232 100220 48222 32767 2 0x10 syz-executor.0 * 9232 95604 48222 32767 7 0x4000010 syz-executor.0 9232 268028 48222 32767 2 0x4000010 syz-executor.0 9232 228138 48222 32767 2 0x4000010 syz-executor.0 9232 354654 48222 32767 7 0x4000010 syz-executor.0 9232 514675 48222 32767 2 0x4000010 syz-executor.0 17652 303443 41169 32767 3 0x90 nanoslp syz-executor.1 17652 80560 41169 32767 3 0x4000090 fsleep syz-executor.1 48222 395647 62811 32767 2 0x490 syz-executor.0 62811 266314 95662 0 3 0x82 wait syz-executor.0 49263 249168 0 0 3 0x14200 bored sosplice 41169 310134 28918 32767 3 0x90 nanoslp syz-executor.1 28918 59449 95662 0 3 0x82 wait syz-executor.1 95662 250744 59721 0 3 0x82 thrsleep syz-fuzzer 95662 261097 59721 0 3 0x4000082 thrsleep syz-fuzzer 95662 517026 59721 0 3 0x4000082 thrsleep syz-fuzzer 95662 234691 59721 0 3 0x4000082 thrsleep syz-fuzzer 95662 229241 59721 0 3 0x4000082 thrsleep syz-fuzzer 95662 76162 59721 0 3 0x4000082 thrsleep syz-fuzzer 95662 391005 59721 0 3 0x4000082 kqread syz-fuzzer 95662 296803 59721 0 3 0x4000082 thrsleep syz-fuzzer 59721 430558 3427 0 3 0x10008a sigsusp ksh 3427 123321 64052 0 3 0x9a kqread sshd 2354 47120 1 0 3 0x100083 ttyin getty 64052 322089 1 0 3 0x88 kqread sshd 24714 291847 58841 73 3 0x100090 kqread syslogd 58841 118992 1 0 3 0x100082 netio syslogd 51241 80658 1 0 3 0x100080 kqread resolvd 7012 229918 86418 77 3 0x100092 kqread dhcpleased 73925 190427 86418 77 3 0x100092 kqread dhcpleased 86418 395815 1 0 3 0x80 kqread dhcpleased 4116 391020 0 0 3 0x14200 bored smr 31868 234514 0 0 2 0x14200 zerothread 74533 376335 0 0 3 0x14200 aiodoned aiodoned 20461 348737 0 0 3 0x14200 syncer update 52064 46228 0 0 3 0x14200 cleaner cleaner 2016 244038 0 0 3 0x14200 reaper reaper 18807 391350 0 0 3 0x14200 pgdaemon pagedaemon 72756 238490 0 0 3 0x14200 bored viomb 21101 382041 0 0 3 0x40014200 acpi0 acpi0 18250 102842 0 0 3 0x40014200 idle1 52012 152465 0 0 3 0x14200 bored softnet 7266 406464 0 0 3 0x14200 bored systqmp 67225 127051 0 0 3 0x14200 bored systq 27847 392014 0 0 2 0x40014200 softclock 88018 264472 0 0 3 0x40014200 idle0 1 219548 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &map->flags_lock r = 0 (0xfffffd807efff0a0) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 vm_map_lock_ln+0xe6 sys/uvm/uvm_map.c:5461 #4 uvmfault_lookup+0xc2 sys/uvm/uvm_fault.c:1739 #5 uvm_fault_check+0x607 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #5 uvm_fault_check+0x607 sys/uvm/uvm_fault.c:714 #6 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #7 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #8 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #9 recall_trap+0x8 Process 9232 (syz-executor.0) thread 0xffff8000ffff4000 (95604) 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 uvm_fault_lower+0x95d sys/uvm/uvm_fault.c:1290 #6 uvm_fault+0x24f sys/uvm/uvm_fault.c:640 #7 kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 #8 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #9 alltraps_kern_meltdown+0x7b #10 copyout+0x53 #11 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #12 Xsyscall+0x128 exclusive rwlock fdlock r = 0 (0xfffffd806c8e3058) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 dopipe+0xd6 #2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #3 Xsyscall+0x128 Process 9232 (syz-executor.0) thread 0xffff8000ffff42a0 (354654) exclusive rwlock vmmaplk r = 0 (0xfffffd807efff018) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5458 #3 uvmfault_lookup+0xc2 sys/uvm/uvm_fault.c:1739 #4 uvm_fault_check+0x607 uvmfault_amapcopy sys/uvm/uvm_fault.c:236 [inline] #4 uvm_fault_check+0x607 sys/uvm/uvm_fault.c:714 #5 uvm_fault+0x102 sys/uvm/uvm_fault.c:602 #6 upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 #7 usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 #8 recall_trap+0x8 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10143 6393K 6416K 78643K 11237 0 pcb 13 12K 14K 78643K 17 0 rtable 120 3K 4K 78643K 271 0 ifaddr 39 10K 10K 78643K 46 0 sysctl 2 0K 0K 78643K 2 0 counters 44 34K 34K 78643K 46 0 ioctlops 0 0K 2K 78643K 104 0 iov 0 0K 16K 78643K 143 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1209 76K 76K 78643K 1746 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 18 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 625 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 8 25K 33K 78643K 1939 0 sigio 0 0K 0K 78643K 9 0 proc 56 74K 99K 78643K 407 0 subproc 26 1K 1K 78643K 39 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 249 0 in_multi 33 2K 2K 78643K 74 0 ether_multi 1 0K 0K 78643K 11 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 175 784K 784K 78643K 175 0 exec 0 0K 2K 78643K 634 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 224 31K 43K 78643K 27319 0 UVM aobj 107 3K 3K 78643K 126 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 64 0 NDP 5 0K 0K 78643K 12 0 temp 76 4195K 4260K 78643K 6522 0 kqueue 12 18K 24K 78643K 175 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 120 280 0 277 6 5 1 3 0 8 0 rtentry 112 63 0 12 2 0 2 2 0 8 0 unpcb 128 1303 0 1282 11 9 2 5 0 8 1 syncache 296 20 0 20 5 5 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 1166 0 1157 45 38 7 10 0 8 5 arp 120 10 0 2 1 0 1 1 0 8 0 ipq 40 5 0 3 2 1 1 1 0 8 0 ipqe 40 13 0 9 2 1 1 1 0 8 0 inpcb 304 2184 0 2171 40 33 7 12 0 8 5 rttmr 72 9 0 7 1 0 1 1 0 8 0 ip6q 72 5 0 5 1 1 0 1 0 8 0 ip6af 40 15 0 15 1 1 0 1 0 8 0 nd6 48 12 0 3 1 0 1 1 0 8 0 kcovpl 48 3 0 1 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 330 0 44 18 0 18 18 0 8 0 art_table 32 331 0 44 3 0 3 3 0 8 0 art_node 16 62 0 15 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semapl 112 623 0 613 1 0 1 1 0 8 0 shmpl 112 123 0 19 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4166 0 2754 92 3 89 89 0 8 0 ffsino 272 4166 0 2754 96 1 95 95 0 8 0 nchpl 144 7034 0 5433 60 0 60 60 0 8 0 uvmvnodes 80 4214 0 0 86 0 86 86 0 8 0 vnodes 224 4214 0 0 248 0 248 248 0 8 0 namei 1024 22499 0 22499 1 0 1 1 0 8 1 percpumem 16 35 0 1 1 0 1 1 0 8 0 scxspl 216 19453 0 19453 22 18 4 8 0 8 4 plimitpl 152 324 0 314 1 0 1 1 0 8 0 sigapl 424 2167 0 2133 4 0 4 4 0 8 0 futexpl 64 14308 0 14307 1 0 1 1 0 8 0 knotepl 112 101 0 0 3 0 3 3 0 8 0 kqueuepl 216 747 0 739 19 14 5 5 0 8 4 pipepl 336 1961 0 1948 34 27 7 9 0 8 5 fdescpl 496 2152 0 2133 4 1 3 3 0 8 0 filepl 152 17516 0 17400 48 39 9 15 0 8 4 lockfpl 104 377 0 374 2 1 1 2 0 8 0 lockfspl 48 83 0 80 1 0 1 1 0 8 0 sessionpl 144 18 0 8 1 0 1 1 0 8 0 pgrppl 48 18 0 8 1 0 1 1 0 8 0 ucredpl 96 2929 0 2917 1 0 1 1 0 8 0 zombiepl 144 2133 0 2133 1 0 1 1 0 8 1 processpl 1064 2167 0 2133 4 1 3 3 0 8 0 procpl 672 6454 0 6407 10 5 5 5 0 8 1 sosppl 168 29 0 29 7 6 1 1 0 8 1 sockpl 480 3795 0 3764 106 94 12 28 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 11 0 0 2 0 2 2 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 156 0 0 18 0 18 18 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 357 0 0 18 1 17 17 0 8 0 bufpl 288 6869 0 544 452 0 452 452 0 8 0 anonpl 24 606705 0 594122 118 39 79 98 0 186 3 amapchunkpl 152 66853 0 66276 42 19 23 33 0 158 0 amappl16 200 5591 0 5216 44 23 21 32 0 8 1 amappl15 192 73 0 67 1 0 1 1 0 8 0 amappl14 184 939 0 937 1 0 1 1 0 8 0 amappl13 176 985 0 981 1 0 1 1 0 8 0 amappl12 168 11 0 10 2 1 1 1 0 8 0 amappl11 160 61 0 48 1 0 1 1 0 8 0 amappl10 152 21 0 18 1 0 1 1 0 8 0 amappl9 144 256 0 253 1 0 1 1 0 8 0 amappl8 136 369 0 328 2 0 2 2 0 8 0 amappl7 128 56 0 47 1 0 1 1 0 8 0 amappl6 120 57 0 47 1 0 1 1 0 8 0 amappl5 112 2180 0 2160 1 0 1 1 0 8 0 amappl4 104 576 0 547 1 0 1 1 0 8 0 amappl3 96 300 0 283 1 0 1 1 0 8 0 amappl2 88 3298 0 3252 2 0 2 2 0 8 0 amappl1 80 41519 0 41063 12 2 10 12 0 8 0 amappl 88 26918 0 26754 4 0 4 4 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 72 125 0 19 2 0 2 2 0 8 0 uaddrrnd 24 2152 0 2133 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2152 0 2133 1 0 1 1 0 8 0 vmmpekpl 168 26191 0 26171 2 0 2 2 0 8 0 vmmpepl 168 200535 0 198795 101 25 76 89 0 357 0 vmsppl 368 2151 0 2133 2 0 2 2 0 8 0 rwobjpl 56 55385 0 49947 79 2 77 77 0 8 0 pdppl 4096 4312 0 4266 68 22 46 50 0 8 0 pvpl 32 1048937 0 1032719 193 54 139 163 0 265 7 pmappl 248 2151 0 2133 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 860 0 94 22 0 22 22 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace uvm_fault_lower(ffff800022aa6f90,ffff800022aa6fc8,ffff800022aa6f10,0) at uvm_fault_lower+0xbb1 sys/uvm/uvm_fault.c:1325 uvm_fault(fffffd807efff000,20000000,0,2) at uvm_fault+0x24f sys/uvm/uvm_fault.c:640 kpageflttrap(ffff800022aa7120,200003c0) at kpageflttrap+0x1fd sys/arch/amd64/amd64/trap.c:264 kerntrap(ffff800022aa7120) at kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x53 syscall(ffff800022aa7360) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022aa7360) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x725d2707da0, 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 __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd807efff000,7260848f000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff800022ac9e00,7260848f8c8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800022ac9e00) 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 __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6eb0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_fault(fffffd807efff000,7260848f000,0,2) at uvm_fault+0x233 sys/uvm/uvm_fault.c:639 upageflttrap(ffff800022ac9e00,7260848f8c8) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff800022ac9e00) at usertrap+0x214 sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end trace frame: 0x0, count: -8