panic: uvm_fault_unwire_lockWedA: RNaIdNdGr:e sSsP Ln oNtO Ti nL mOWaEpR EDS taOrNt iSngYS CsAtLacLk 9t1r a2c0e79..0.2 9032 EXIT 0 a Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 350415 75093 0 0 0x4000000 0 syz-executor *495975 81419 0 0 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x75607beb7710, 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 *cpu0: uvm_fault_unwire_locked: address not in map ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x75607beb7710, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800038fec200 rbx 0 rdx 0 rcx 0xffff8000fffe8d18 rax 0x3b r8 0xffff800038fec130 r9 0x1 r10 0xd95880007e423e34 r11 0xcdbacf411c4b8c16 r12 0 r13 0 r14 0xffff8000fffe8d18 r15 0 rip 0xffffffff811233ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff800038fec180 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=495975 pid=81419 tcnt=2 stat=onproc flags process=0 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a7f7a28,0xffff8000fffe82c8 process=0xffff8000fffece88 user=0xffff800038fe7000, vmspace=0xfffffd806efb2990 estcpu=36, cpticks=4, pctcpu=0.0, user=3, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75093 231179 46343 0 2 0 syz-executor 75093 350415 46343 0 7 0x4000000 syz-executor 75093 161692 46343 0 2 0x4000000 syz-executor *81419 495975 25325 0 7 0 syz-executor 81419 497401 25325 0 3 0x4000080 ttyretype syz-executor 27073 17853 20805 0 3 0x80 nanoslp syz-executor 27073 278942 20805 0 3 0x4000080 sbwait syz-executor 27073 503929 20805 0 3 0x4000080 fsleep syz-executor 90860 225476 0 0 3 0x14200 acct acct 20805 263890 8842 0 3 0x82 nanoslp syz-executor 87846 290837 8842 0 3 0x82 nanoslp syz-executor 46343 518120 8842 0 3 0x82 nanoslp syz-executor 7603 33825 8842 0 3 0x82 nanoslp syz-executor 84883 137127 8842 0 3 0x82 nanoslp syz-executor 50565 44751 0 0 3 0x14200 bored sosplice 67541 470255 86984 0 3 0x100082 sbwait ndp 86984 359918 59833 0 3 0x10008a sigsusp sh 93509 157042 8842 0 2 0xc82 syz-executor 59833 276305 8842 0 3 0x82 wait syz-executor 25325 67944 8842 0 3 0x82 nanoslp syz-executor 8842 419039 12924 0 3 0x82 kqread syz-executor 12924 111333 52749 0 3 0x10008a sigsusp ksh 52749 133426 8069 0 3 0x98 kqread sshd-session 8069 315726 53425 0 3 0x92 kqread sshd-session 46589 108793 1 0 3 0x100083 ttyin getty 53425 477146 1 0 3 0x88 kqread sshd 10050 193631 25529 74 3 0x1100092 bpf pflogd 25529 384799 1 0 3 0x80 sbwait pflogd 74255 429945 70121 73 3 0x1100090 kqread syslogd 70121 98198 1 0 3 0x100082 sbwait syslogd 56858 329320 1 0 3 0x100080 kqread resolvd 8523 425452 39917 77 3 0x100092 kqread dhcpleased 2232 412184 39917 77 3 0x100092 kqread dhcpleased 39917 65109 1 0 3 0x80 kqread dhcpleased 97650 261231 0 0 3 0x14200 bored smr 99458 35891 0 0 3 0x14200 pgzero zerothread 65646 240131 0 0 3 0x14200 aiodoned aiodoned 51655 48919 0 0 3 0x14200 syncer update 79467 265820 0 0 3 0x14200 cleaner cleaner 98260 279993 0 0 3 0x14200 reaper reaper 66877 430315 0 0 3 0x14200 pgdaemon pagedaemon 5392 160264 0 0 3 0x14200 bored viomb 53036 58339 0 0 3 0x40014200 acpi0 acpi0 15010 434591 0 0 3 0x40014200 idle1 77356 13241 0 0 3 0x14200 bored softnet1 66266 521769 0 0 3 0x14200 bored softnet0 3944 24371 0 0 3 0x14200 bored systqmp 81584 36886 0 0 3 0x14200 bored systq 76796 237141 0 0 3 0x14200 tmoslp softclockmp 9727 166836 0 0 3 0x40014200 tmoslp softclock 91918 44615 0 0 3 0x40014200 idle0 1 288938 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff838efea0) #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 uvm_pmr_freepages+0x1a8 sys/uvm/uvm_pmemrange.c:-1 #4 uvm_anfree_list+0x1e5 sys/uvm/uvm_anon.c:129 #5 amap_wiperange_chunk+0x1a8 sys/uvm/uvm_amap.c:-1 #6 amap_pp_adjref+0x6d0 sys/uvm/uvm_amap.c:-1 #7 amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1300 #8 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #9 sys_munmap+0x329 sys/uvm/uvm_mmap.c:544 #10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 Process 75093 (syz-executor) thread 0xffff80003a7f62d0 (350415) Process 75093 (syz-executor) thread 0xffff80003a7f6d30 (161692) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10236 11048K 12413K 166960K 12766 0 pcb 18 15K 22K 166960K 283 0 rtable 230 11K 12K 166960K 652 0 pf 41 18K 67485K 166960K 237 0 ifaddr 43 7K 8K 166960K 117 0 ifgroup 57 2K 2K 166960K 199 0 sysctl 4 1K 9K 166960K 13 0 counters 76 37K 37K 166960K 200 0 ioctlops 0 0K 4K 166960K 1759 0 iov 1 2K 24K 166960K 156 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1407 88K 89K 166960K 2314 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 78 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 244K 166960K 1226 0 sigio 0 0K 0K 166960K 25 0 proc 72 115K 180K 166960K 769 0 subproc 72 4K 4K 166960K 118 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 139 0 in_multi 87 6K 7K 166960K 193 0 ether_multi 1 0K 0K 166960K 14 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 590 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 251 154K 176K 166960K 12687 0 UVM aobj 29 4K 4K 166960K 30 0 pinsyscall 45 90K 106K 166960K 2550 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 89 0 NDP 14 0K 1K 166960K 83 0 temp 67 8653K 8775K 166960K 58146 0 kqueue 14 22K 30K 166960K 263 0 SYN cache 2 8K 16K 166960K 3 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 120 123 0 118 1 0 1 1 0 8 0 rtentry 176 203 0 109 5 0 5 5 0 8 0 unpcb 144 689 0 670 6 5 1 4 0 8 0 syncache 336 18 0 18 4 4 0 1 0 8 0 tcpqe 32 13 0 13 3 3 0 1 0 8 0 tcpcb 736 581 0 562 9 1 8 8 0 8 6 arp 136 35 0 18 1 0 1 1 0 8 0 inpcb 328 1495 0 1471 16 6 10 13 0 8 6 nd6 152 43 0 20 2 0 2 2 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 47 0 42 1 0 1 1 0 8 0 pppxif 1504 4 0 4 1 1 0 1 0 8 0 pfstscr 40 5 0 4 1 0 1 1 0 8 0 pffrag 232 8 0 0 1 0 1 1 0 482 0 pffrnode 88 8 0 0 1 0 1 1 0 8 0 pffrent 40 9 0 1 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 132 0 27 1 0 1 1 0 8 0 pfstkey 128 140 0 35 4 0 4 4 0 8 0 pfstate 384 135 0 31 11 0 11 11 0 8 0 pfrule 1344 55 0 50 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 808 0 401 35 6 29 29 0 8 1 art_table 40 810 0 401 5 0 5 5 0 8 0 art_node 32 201 0 119 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 10 2 1 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 76 0 66 1 0 1 1 0 8 0 shmpl 112 27 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 3579 0 2063 95 0 95 95 0 8 0 ffsino 296 3579 0 2063 117 0 117 117 0 8 0 nchpl 144 5197 0 3483 64 0 64 64 0 8 0 rtmask 32 10 0 10 2 2 0 1 0 8 0 vnodes 216 4150 0 0 231 0 231 231 0 8 0 namei 1024 18653 0 18653 4 3 1 2 0 8 1 percpumem 16 115 0 62 1 0 1 1 0 8 0 kstatmem 264 116 0 86 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 4 0 4 3 3 0 1 0 8 0 scxspl 216 36956 0 36956 8 6 2 6 1 8 2 plimitpl 152 383 0 363 1 0 1 1 0 8 0 sigapl 424 1553 0 1502 9 2 7 9 0 8 0 knotepl 120 847 0 0 26 0 26 26 0 8 0 kqueuepl 224 419 0 408 3 2 1 2 0 8 0 pipepl 344 348 0 321 9 6 3 9 0 8 0 fdescpl 528 1514 0 1481 3 0 3 3 0 8 0 filepl 160 9798 0 9561 20 6 14 16 0 8 1 lockfpl 104 602 0 600 2 1 1 2 0 8 0 lockfspl 48 142 0 140 1 0 1 1 0 8 0 sessionpl 144 39 0 30 1 0 1 1 0 8 0 pgrppl 48 57 0 40 1 0 1 1 0 8 0 ucredpl 104 1644 0 1631 1 0 1 1 0 8 0 zombiepl 144 1506 0 1502 2 1 1 1 0 8 0 processpl 1232 1553 0 1502 6 1 5 6 0 8 0 procpl 664 3345 0 3289 8 1 7 8 0 8 0 sosppl 168 2 0 2 2 2 0 1 0 8 0 sockpl 752 2372 0 2324 25 13 12 18 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 50 0 0 6 0 6 6 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 239 0 0 14 0 14 14 0 8 0 bufpl 280 16182 0 10044 439 0 439 439 0 8 0 anonpl 32 15733 0 0 128 1 127 128 0 246 0 amapchunkpl 152 42839 0 42341 40 10 30 33 0 158 7 amappl16 200 5631 0 5598 48 33 15 39 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 12 0 11 1 0 1 1 0 8 0 amappl13 176 494 0 492 1 0 1 1 0 8 0 amappl12 168 1950 0 1904 3 0 3 3 0 8 0 amappl11 160 41 0 41 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 103 0 101 1 0 1 1 0 8 0 amappl6 120 356 0 339 1 0 1 1 0 8 0 amappl5 112 87 0 77 1 0 1 1 0 8 0 amappl4 104 526 0 494 1 0 1 1 0 8 0 amappl3 96 7441 0 7350 4 1 3 3 0 8 0 amappl2 88 1707 0 1629 2 0 2 2 0 8 0 amappl1 80 17586 0 16955 15 0 15 15 0 8 0 amappl 88 11611 0 11443 5 0 5 5 0 92 0 uvmvnodes 80 4150 0 0 85 0 85 85 0 8 0 dma32768 32768 4 0 4 3 2 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 254 0 254 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 1515 0 1482 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1515 0 1482 1 0 1 1 0 8 0 vmmpekpl 168 15000 0 14951 4 1 3 3 0 8 0 vmmpepl 168 107340 0 105324 123 24 99 120 0 357 4 vmsppl 488 1514 0 1482 5 0 5 5 0 8 0 rwobjpl 80 36226 0 31067 107 0 107 107 0 8 1 pdppl 4096 3038 0 2964 116 40 76 86 0 8 2 pvpl 32 23297 0 0 188 0 188 188 0 265 0 pmappl 256 1514 0 1482 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 319 0 61 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8386eff0) 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+0x50 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x50 sys/dev/kcov.c:153 __mp_lock(ffffffff8396e950) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8396e950) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 kputchar(a,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 printf(ffffffff83334134) at printf+0x8b sys/kern/subr_prf.c:529 db_stack_dump() at db_stack_dump+0x7c sys/ddb/db_output.c:241 panic(ffffffff833d6705) at panic+0x1d0 sys/kern/subr_prf.c:229 end trace frame: 0xffff80002a390420, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8386eff0) 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+0x50 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x50 sys/dev/kcov.c:153 __mp_lock(ffffffff8396e950) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8396e950) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 cnputc(a) at cnputc+0x67 sys/dev/cons.c:218 kputchar(a,5,0) at kputchar+0x2ed sys/kern/subr_prf.c:367 kprintf() at kprintf+0x203 sys/kern/subr_prf.c:723 printf(ffffffff83334134) at printf+0x8b sys/kern/subr_prf.c:529 db_stack_dump() at db_stack_dump+0x7c sys/ddb/db_output.c:241 panic(ffffffff833d6705) at panic+0x1d0 sys/kern/subr_prf.c:229 uvm_fault_unwire_locked(fffffd806c20ed70,200000290000,200000298000) at uvm_fault_unwire_locked+0x4ee uvm_fault_wire(fffffd806c20ed70,200000290000,2000002a1000,1) at uvm_fault_wire+0x12d uvm_fault_unwire sys/uvm/uvm_fault.c:1744 [inline] uvm_fault_wire(fffffd806c20ed70,200000290000,2000002a1000,1) at uvm_fault_wire+0x12d sys/uvm/uvm_fault.c:1726 uvm_vslock_device(ffff80003a7f62d0,2000002904c0,10000,1,ffff80002a3905a8) at uvm_vslock_device+0x112 sys/uvm/uvm_glue.c:169 physio(ffffffff81a6d2e0,d02,0,ffffffff81a6db30,ffff80002a390888) at physio+0x257 sys/kern/kern_physio.c:139 spec_write(ffff80002a3906d0) at spec_write+0x11f sys/kern/spec_vnops.c:302 VOP_WRITE(fffffd8068862480,ffff80002a390888,5,fffffd80097fb618) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_write(fffffd806c189ea0,ffff80002a390888,0) at vn_write+0x1d3 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80003a7f62d0,6,ffff80002a390888,0,ffff80002a390940) at dofilewritev+0x242 sys/kern/sys_generic.c:380 sys_write(ffff80003a7f62d0,ffff80002a3909f0,ffff80002a390940) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80002a3909f0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3909f0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x170e2d85d10, count: -25 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x75607beb7710, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x75607beb7710, count: -1