panic: uvm_fault_unwire_locked: addressW nARoNtING : iSnP L mNapOT LSOtWarEtRiEDn gO N sStYaScCk ALtrLa c73e .5.. 7344 EXIT 0 9 Stopped at savectx+0xae: movl $0,%gs:0x680 TID PID UID PRFLAGS PFLAGS CPU COMMAND 402236 52988 0 0 0x4000000 1K syz-executor *178205 52988 0 0 0x4000000 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0xea8490f8a10, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu1: uvm_fault_unwire_locked: address not in map ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xea8490f8a10, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000330ee510 rbx 0 rdx 0 rcx 0xffff80003c52d220 rax 0x36 r8 0xffff8000330ee440 r9 0 r10 0xf861da4067e70a9 r11 0x107b650bcfcb5162 r12 0 r13 0 r14 0xffff80003c52d220 r15 0 rip 0xffffffff811f73ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff8000330ee490 ss 0x10 savectx+0xae: movl $0,%gs:0x680 ddb{0}> show proc PROC (syz-executor) tid=178205 pid=52988 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c52cf90,0xffff8000334af9d0 process=0xffff8000358b0958 user=0xffff8000330e9000, vmspace=0xfffffd806be24ac8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52988 371573 61970 0 2 0 syz-executor 52988 402236 61970 0 7 0x4000000 syz-executor *52988 178205 61970 0 7 0x4000000 syz-executor 52988 249249 61970 0 2 0x4000000 syz-executor 59103 511990 66483 0 3 0x80 nanoslp syz-executor 59103 21002 66483 0 3 0x4000080 wsevent_read syz-executor 59103 286822 66483 0 3 0x4000080 fsleep syz-executor 39952 468093 1 0 3 0x100083 ttyin getty 31853 19315 0 0 3 0x14280 nfsidl nfsio 31093 377141 0 0 3 0x14280 nfsidl nfsio 51266 382682 0 0 3 0x14280 nfsidl nfsio 26408 171265 0 0 3 0x14280 nfsidl nfsio 84605 245067 0 0 3 0x14280 nfsidl nfsio 87547 359426 0 0 3 0x14280 nfsidl nfsio 87618 187612 0 0 3 0x14280 nfsidl nfsio 41270 273107 0 0 3 0x14280 nfsidl nfsio 25585 313387 0 0 3 0x14280 nfsidl nfsio 33675 29725 0 0 3 0x14280 nfsidl nfsio 9024 482811 0 0 3 0x14280 nfsidl nfsio 26957 383111 0 0 3 0x14280 nfsidl nfsio 8803 506669 0 0 3 0x14280 nfsidl nfsio 10872 487335 0 0 3 0x14280 nfsidl nfsio 42145 190009 0 0 3 0x14280 nfsidl nfsio 91168 445289 0 0 3 0x14280 nfsidl nfsio 71151 126995 0 0 3 0x14280 nfsidl nfsio 98531 270173 0 0 3 0x14280 nfsidl nfsio 2587 396403 0 0 3 0x14280 nfsidl nfsio 72680 499834 0 0 3 0x14280 nfsidl nfsio 7873 36337 0 0 3 0x14200 bored sosplice 14754 480472 68230 0 3 0x82 piperd syz-executor 66483 445108 68230 0 3 0x82 nanoslp syz-executor 75363 318271 68230 0 3 0x82 piperd syz-executor 47297 89423 68230 0 3 0x82 piperd syz-executor 75085 149915 68230 0 3 0x82 piperd syz-executor 61970 213239 68230 0 3 0x82 nanoslp syz-executor 93057 412964 68230 0 3 0x82 piperd syz-executor 68230 43496 54829 0 3 0x82 wait syz-executor 54829 506654 9543 0 3 0x10008a sigsusp ksh 9543 105231 70962 0 3 0x98 kqread sshd-session 70962 355770 33065 0 3 0x92 kqread sshd-session 33065 495801 1 0 3 0x88 kqread sshd 56022 347188 56546 74 3 0x1100092 bpf pflogd 56546 133787 1 0 3 0x80 sbwait pflogd 86921 221120 22223 73 3 0x1100090 kqread syslogd 22223 316398 1 0 3 0x100082 sbwait syslogd 14181 288252 1 0 3 0x100080 kqread resolvd 24162 516180 25878 77 3 0x100092 kqread dhcpleased 99744 468724 25878 77 3 0x100092 kqread dhcpleased 25878 301131 1 0 3 0x80 kqread dhcpleased 81724 84142 0 0 3 0x14200 bored smr 91365 327941 0 0 2 0x14200 zerothread 61958 264701 0 0 3 0x14200 aiodoned aiodoned 46176 386774 0 0 3 0x14200 syncer update 77869 295699 0 0 3 0x14200 cleaner cleaner 39683 354483 0 0 3 0x14200 reaper reaper 28019 263477 0 0 3 0x14200 pgdaemon pagedaemon 97676 406388 0 0 3 0x14200 bored viomb 22178 267565 0 0 3 0x40014200 acpi0 acpi0 86414 78281 0 0 3 0x40014200 idle1 31263 238564 0 0 3 0x14200 bored softnet3 19397 338810 0 0 3 0x14200 bored softnet2 93607 298662 0 0 3 0x14200 bored softnet1 2743 506501 0 0 3 0x14200 bored softnet0 85294 135383 0 0 3 0x14200 bored systqmp 46093 372559 0 0 3 0x14200 bored systq 80914 306396 0 0 3 0x14200 tmoslp softclockmp 53861 301432 0 0 3 0x40014200 tmoslp softclock 91439 253462 0 0 3 0x40014200 idle0 1 341948 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex anonpl r = 0 (0xffffffff83991738) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pool_put+0xa6 sys/kern/subr_pool.c:801 #4 amap_wipeout+0x248 sys/uvm/uvm_amap.c:502 #5 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #6 sys_munmap+0x32f sys/uvm/uvm_mmap.c:544 #7 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #8 Xsyscall+0x128 Process 52988 (syz-executor) thread 0xffff80003c52cf90 (402236) Process 52988 (syz-executor) thread 0xffff80003c52d220 (178205) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10201 11098K 11410K 166960K 12256 0 pcb 17 16K 18K 166960K 191 0 rtable 231 9K 9K 166960K 1048 0 pf 35 17K 21K 166960K 146 0 ifaddr 40 7K 7K 166960K 158 0 ifgroup 58 2K 3K 166960K 209 0 sysctl 3 1K 1K 166960K 3 0 counters 64 36K 37K 166960K 168 0 ioctlops 0 0K 4K 166960K 1558 0 iov 1 0K 20K 166960K 121 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1403 88K 88K 166960K 2164 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 16 5K 5K 166960K 25 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 12 41K 93K 166960K 1079 0 sigio 0 0K 0K 166960K 5 0 proc 72 91K 116K 166960K 1149 0 subproc 72 4K 4K 166960K 252 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 328 0 in_multi 81 6K 7K 166960K 340 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 1281 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 199 167K 188K 166960K 10631 0 UVM aobj 29 2K 2K 166960K 30 0 pinsyscall 37 74K 110K 166960K 2746 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 39 0 NDP 12 0K 2K 166960K 110 0 temp 52 8686K 8941K 166960K 36915 0 kqueue 13 20K 28K 166960K 146 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 114 0 111 1 0 1 1 0 8 0 rtentry 168 356 0 253 5 0 5 5 0 8 0 unpcb 144 750 0 733 12 10 2 8 0 8 1 syncache 336 8 0 8 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 223 0 217 8 7 1 7 0 8 0 arp 120 61 0 41 1 0 1 1 0 8 0 inpcb 376 993 0 984 20 13 7 14 0 8 5 nd6 136 92 0 69 1 0 1 1 0 8 0 pkpcb 40 7 0 7 3 3 0 1 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 ppxss 1168 22 0 22 2 1 1 1 0 8 1 pppxif 1480 6 0 6 2 2 0 1 0 8 0 pffrag 232 4 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 7 0 3 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 1 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 77 0 29 1 0 1 1 0 8 0 pfstkey 128 77 0 29 2 0 2 2 0 8 0 pfstate 376 77 0 29 5 0 5 5 0 8 0 pfrule 1344 27 0 21 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1443 0 1044 30 4 26 29 0 8 0 art_table 32 1445 0 1044 4 0 4 4 0 8 0 art_node 16 352 0 259 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 6 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 20 0 6 1 0 1 1 0 8 0 shmpl 112 27 0 1 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2836 0 1295 97 0 97 97 0 8 0 ffsino 280 2836 0 1295 111 0 111 111 0 8 0 nchpl 144 3960 0 2211 66 0 66 66 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 uvmvnodes 80 3452 0 0 71 0 71 71 0 8 0 vnodes 216 3452 0 0 192 0 192 192 0 8 0 namei 1024 15943 0 15943 3 2 1 2 0 8 1 percpumem 16 98 0 52 1 0 1 1 0 8 0 kstatmem 264 108 0 84 3 1 2 3 0 8 0 scsiplug 72 5 0 5 2 2 0 1 0 8 0 scxspl 216 12399 0 12399 11 10 1 8 1 8 1 plimitpl 152 293 0 276 1 0 1 1 0 8 0 sigapl 424 1377 0 1312 10 1 9 9 0 8 0 futexpl 64 10248 0 10247 1 0 1 1 0 8 0 knotepl 120 310 0 0 10 0 10 10 0 8 0 kqueuepl 216 364 0 355 8 6 2 5 0 8 1 pipepl 328 214 0 187 3 0 3 3 0 8 0 fdescpl 504 1337 0 1311 5 0 5 5 0 8 0 filepl 152 7661 0 7449 21 9 12 17 0 8 2 lockfpl 104 176 0 174 1 0 1 1 0 8 0 lockfspl 48 81 0 79 1 0 1 1 0 8 0 sessionpl 144 48 0 39 1 0 1 1 0 8 0 pgrppl 48 81 0 64 1 0 1 1 0 8 0 ucredpl 104 1440 0 1427 1 0 1 1 0 8 0 zombiepl 144 1313 0 1312 1 0 1 1 0 8 0 processpl 1176 1377 0 1312 6 0 6 6 0 8 0 procpl 656 2463 0 2393 8 0 8 8 0 8 0 srpgc 96 4 0 4 1 1 0 1 0 8 0 sosppl 168 3 0 3 2 2 0 1 0 8 0 sockpl 688 1871 0 1842 33 25 8 21 0 8 4 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 0 16 16 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 91 0 0 3 0 3 3 0 8 0 mbufpl 256 268 0 0 16 0 16 16 0 8 0 bufpl 280 3786 0 128 262 0 262 262 0 8 0 anonpl 24 180892 0 177862 55 21 34 45 0 184 6 amapchunkpl 152 32469 0 32120 34 9 25 28 0 158 6 amappl16 200 2835 0 2806 19 14 5 14 0 8 2 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 165 0 153 1 0 1 1 0 8 0 amappl13 176 27 0 27 1 1 0 1 0 8 0 amappl12 168 2334 0 2308 4 2 2 3 0 8 0 amappl11 160 65 0 51 1 0 1 1 0 8 0 amappl10 152 18 0 17 1 0 1 1 0 8 0 amappl9 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 166 0 154 1 0 1 1 0 8 0 amappl6 120 387 0 384 1 0 1 1 0 8 0 amappl5 112 231 0 221 1 0 1 1 0 8 0 amappl4 104 407 0 386 1 0 1 1 0 8 0 amappl3 96 6404 0 6324 6 2 4 4 0 8 0 amappl2 88 988 0 923 2 0 2 2 0 8 0 amappl1 80 14565 0 13982 19 4 15 17 0 8 0 amappl 88 9387 0 9262 7 3 4 5 0 92 0 dma4096 4096 34 0 34 2 2 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 128 255 0 255 2 2 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 29 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1337 0 1311 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1337 0 1311 1 0 1 1 0 8 0 vmmpekpl 168 12113 0 12068 3 0 3 3 0 8 0 vmmpepl 168 90345 0 88616 103 11 92 102 0 357 1 vmsppl 456 1336 0 1311 5 0 5 5 0 8 1 rwobjpl 64 28970 0 24602 72 0 72 72 0 8 0 pdppl 4096 2682 0 2622 129 55 74 86 0 8 14 pvpl 32 14076 0 0 114 0 114 114 0 265 0 pmappl 248 1336 0 1311 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 325 0 76 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0xea8490f8a10, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029a9bff0) 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_cmp8(ef780,1d0) at __sanitizer_cov_trace_cmp8+0x2e kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_cmp8(ef780,1d0) at __sanitizer_cov_trace_cmp8+0x2e sys/dev/kcov.c:212 db_elf_sym_search(ffffffff81ebd710,0,ffff800033120630) at db_elf_sym_search+0x150 sys/ddb/db_elf.c:306 db_search_symbol(ffffffff81ebd710,0,ffff8000331206a0) at db_search_symbol+0x52 sys/ddb/db_sym.c:106 db_stack_trace_print(ffff800033120770,1,100,ffffffff833810ce,ffffffff81ebdd30) at db_stack_trace_print+0x2fe sys/arch/amd64/amd64/db_trace.c:147 db_stack_dump() at db_stack_dump+0xa5 sys/ddb/db_output.c:243 panic(ffffffff83415ad5) at panic+0x1d0 sys/kern/subr_prf.c:229 uvm_fault_unwire_locked(fffffd806be24ac8,200000300000,200000307000) at uvm_fault_unwire_locked+0x4ed uvm_fault_wire(fffffd806be24ac8,200000300000,200000311000,1) at uvm_fault_wire+0x12d uvm_fault_unwire sys/uvm/uvm_fault.c:1702 [inline] uvm_fault_wire(fffffd806be24ac8,200000300000,200000311000,1) at uvm_fault_wire+0x12d sys/uvm/uvm_fault.c:1684 uvm_vslock_device(ffff80003c52cf90,2000003004c0,10000,1,ffff800033120a30) at uvm_vslock_device+0x112 sys/uvm/uvm_glue.c:169 physio(ffffffff821d14f0,d02,0,ffffffff821d1d50,ffff800033120cf8) at physio+0x277 sys/kern/kern_physio.c:139 spec_write(ffff800033120b50) at spec_write+0x120 sys/kern/spec_vnops.c:302 end trace frame: 0xffff800033120bc0, count: 0 ddb{1}> trace x86_ipi_db(ffff800029a9bff0) 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_cmp8(ef780,1d0) at __sanitizer_cov_trace_cmp8+0x2e kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_cmp8(ef780,1d0) at __sanitizer_cov_trace_cmp8+0x2e sys/dev/kcov.c:212 db_elf_sym_search(ffffffff81ebd710,0,ffff800033120630) at db_elf_sym_search+0x150 sys/ddb/db_elf.c:306 db_search_symbol(ffffffff81ebd710,0,ffff8000331206a0) at db_search_symbol+0x52 sys/ddb/db_sym.c:106 db_stack_trace_print(ffff800033120770,1,100,ffffffff833810ce,ffffffff81ebdd30) at db_stack_trace_print+0x2fe sys/arch/amd64/amd64/db_trace.c:147 db_stack_dump() at db_stack_dump+0xa5 sys/ddb/db_output.c:243 panic(ffffffff83415ad5) at panic+0x1d0 sys/kern/subr_prf.c:229 uvm_fault_unwire_locked(fffffd806be24ac8,200000300000,200000307000) at uvm_fault_unwire_locked+0x4ed uvm_fault_wire(fffffd806be24ac8,200000300000,200000311000,1) at uvm_fault_wire+0x12d uvm_fault_unwire sys/uvm/uvm_fault.c:1702 [inline] uvm_fault_wire(fffffd806be24ac8,200000300000,200000311000,1) at uvm_fault_wire+0x12d sys/uvm/uvm_fault.c:1684 uvm_vslock_device(ffff80003c52cf90,2000003004c0,10000,1,ffff800033120a30) at uvm_vslock_device+0x112 sys/uvm/uvm_glue.c:169 physio(ffffffff821d14f0,d02,0,ffffffff821d1d50,ffff800033120cf8) at physio+0x277 sys/kern/kern_physio.c:139 spec_write(ffff800033120b50) at spec_write+0x120 sys/kern/spec_vnops.c:302 VOP_WRITE(fffffd8061869630,ffff800033120cf8,5,fffffd807f7d3478) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806b5bb148,ffff800033120cf8,0) at vn_write+0x1d4 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80003c52cf90,3,ffff800033120cf8,0,ffff800033120db0) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_write(ffff80003c52cf90,ffff800033120e60,ffff800033120db0) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff800033120e60) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033120e60) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xea8525fc9d0, count: -20