panic: kmmaplk rwlock 0xffffffff83ab6a50: enter read deadlock Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83431cfa) at panic+0x1cf sys/kern/subr_prf.c:198 rw_do_enter_read(ffffffff83ab6a50,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379 uvmfault_lookup(ffff80002a7d13e0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 uvm_fault_check(ffff80002a7d13e0,ffff80002a7d1418,ffff80002a7d1450,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(ffffffff83ab6968,ffff800029ee6000,0,2) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80002a7d1580,ffff800029ee6000) at kpageflttrap+0x2d1 sys/arch/amd64/amd64/trap.c:-1 kerntrap(ffff80002a7d1580) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b kcov_remote_enter(0,ffff80002a793190) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff8394f5b0,ffff80002a737d28) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a737d28,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 end trace frame: 0xffff80002a7d17d0, count: 0 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kmmaplk rwlock 0xffffffff83ab6a50: enter read deadlock ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83431cfa) at panic+0x1cf sys/kern/subr_prf.c:198 rw_do_enter_read(ffffffff83ab6a50,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379 uvmfault_lookup(ffff80002a7d13e0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 uvm_fault_check(ffff80002a7d13e0,ffff80002a7d1418,ffff80002a7d1450,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(ffffffff83ab6968,ffff800029ee6000,0,2) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80002a7d1580,ffff800029ee6000) at kpageflttrap+0x2d1 sys/arch/amd64/amd64/trap.c:-1 kerntrap(ffff80002a7d1580) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b kcov_remote_enter(0,ffff80002a793190) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff8394f5b0,ffff80002a737d28) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a737d28,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 memcpy() at memcpy+0x57 uvm_unmap_remove(ffffffff83ab6968,ffff80002a7c4000,ffff80002a7c8000,ffff80002a7d19c8,0,1,e1de20932d5b19cf) at uvm_unmap_remove+0x4fd sys/uvm/uvm_map.c:-1 uvm_unmap(ffffffff83ab6968,ffff80002a7c4000,ffff80002a7c8000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline] uvm_unmap(ffffffff83ab6968,ffff80002a7c4000,ffff80002a7c8000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1799 km_free(ffff80002a7c4000,4000,ffffffff837180c0,ffffffff837181d0) at km_free+0x85 sys/uvm/uvm_km.c:714 pipe_destroy(fffff3006fd5a390) at pipe_destroy+0x265 pipe_buffer_free sys/kern/sys_pipe.c:768 [inline] pipe_destroy(fffff3006fd5a390) at pipe_destroy+0x265 sys/kern/sys_pipe.c:811 pipe_close(fffff3006cf54e98,ffff80002a776540) at pipe_close+0x43 sys/kern/sys_pipe.c:749 fdrop(fffff3006cf54e98,ffff80002a776540) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffff3006cf54e98,ffff80002a776540) at closef+0x190 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a776540) at fdfree+0x115 sys/kern/kern_descrip.c:1196 exit1(ffff80002a776540,1,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a776540,ffff80002a7d1da0,ffff80002a7d1cf0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7d1da0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7d1da0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73dc27cca7e0, count: -29 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a7d10e0 rbx 0xffff800029ee6000 rdx 0 rcx 0 rax 0xffff80002a776540 r8 0x101010101010101 r9 0x8080808080808080 r10 0x203ea1a46409a151 r11 0x68d8ab89aeaa4c13 r12 0 r13 0xffff80002a776544 r14 0 r15 0x1 rip 0xffffffff81553415 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a7d10d0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=491579 pid=55697 tcnt=0 stat=onproc flags process=a proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a777238,0xffff80002a776fb0 process=0xffff80002a791690 user=0xffff80002a7cc000, vmspace=0xfffff3007ec62b80 estcpu=36, cpticks=8, pctcpu=0.1, user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 50870 83 71355 0 3 0x90 nanoslp syz-executor 50870 455857 71355 0 3 0x4000090 msgwait syz-executor 50870 387378 71355 0 3 0x4000090 fsleep syz-executor 30171 473090 94235 0 3 0x80 nanoslp syz-executor 30171 179915 94235 0 3 0x4000080 ttyin syz-executor 30171 110813 94235 0 3 0x4000080 fsleep syz-executor 74537 288597 1 0 3 0x82 nanoslp getty 75448 290268 97668 60929 3 0x90 nanoslp syz-executor 75448 99129 97668 60929 3 0x4000090 kqpoll syz-executor 75448 235100 97668 60929 3 0x4000090 fsleep syz-executor 92492 380367 41593 0 3 0x80 nanoslp syz-executor 92492 143152 41593 0 3 0x4000080 fifor syz-executor 92492 397665 41593 0 3 0x4000080 fsleep syz-executor 18447 297008 69295 -1 3 0x91 nanoslp syz-executor 18447 299536 69295 -1 3 0x4000091 lockf syz-executor 18447 196193 69295 -1 3 0x4000091 fsleep syz-executor 94235 221540 11026 0 3 0x82 nanoslp syz-executor 30584 403699 0 0 3 0x14200 acct acct 69295 473782 11026 0 3 0x82 nanoslp syz-executor 41593 468355 11026 0 3 0x82 nanoslp syz-executor 71355 238265 11026 0 3 0x82 nanoslp syz-executor 69441 376323 11026 0 3 0x82 wait syz-executor 97668 521428 11026 0 3 0x82 nanoslp syz-executor 11026 241342 1 0 3 0x82 wait syz-executor 86126 485925 0 0 3 0x14200 bored smr 37372 386564 0 0 2 0x14200 zerothread 97086 281054 0 0 3 0x14200 aiodoned aiodoned 56167 453938 0 0 3 0x14200 syncer update 97426 204205 0 0 3 0x14200 cleaner cleaner 43991 241426 0 0 3 0x14200 reaper reaper 7378 129047 0 0 3 0x14200 pgdaemon pagedaemon 67213 15922 0 0 3 0x14200 bored viomb 91059 104465 0 0 3 0x40014200 acpi0 acpi0 38431 516592 0 0 3 0x14200 bored softnet0 93081 300004 0 0 3 0x14200 smrbar systqmp 28335 370277 0 0 3 0x14200 bored systq 81067 366539 0 0 3 0x40014200 tmoslp softclock 93594 194032 0 0 3 0x40014200 idle0 1 378977 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11043 12181K 12513K 166960K 12757 0 pcb 18 14K 16K 166960K 223 0 rtable 196 7K 7K 166960K 482 0 pf 38 14K 73K 166960K 101 0 ifaddr 37 6K 7K 166960K 67 0 ifgroup 54 2K 2K 166960K 86 0 sysctl 4 1K 9K 166960K 10 0 counters 34 17K 18K 166960K 47 0 ioctlops 0 0K 4K 166960K 170 0 iov 0 0K 16K 166960K 30 0 mount 1 1K 1K 166960K 1 0 log 1 0K 0K 166960K 5 0 vnodes 1308 82K 83K 166960K 1789 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 29 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 57K 240K 166960K 627 0 sigio 0 0K 0K 166960K 3 0 proc 20 25K 100K 166960K 624 0 subproc 72 4K 4K 166960K 83 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 68 0 in_multi 78 5K 7K 166960K 139 0 ether_multi 2 0K 0K 166960K 3 0 mrt 4 0K 0K 166960K 23 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 437 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 134 74K 156K 166960K 6956 0 UVM aobj 46 2K 2K 166960K 46 0 pinsyscall 18 36K 92K 166960K 1752 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 12 0K 2K 166960K 43 0 temp 53 9114K 9175K 166960K 28178 0 kqueue 2 4K 28K 166960K 126 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 67 0 67 1 0 1 1 0 8 1 rtentry 136 147 0 68 4 0 4 4 0 8 0 unpcb 144 461 0 459 6 5 1 6 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 318 0 310 12 5 7 7 0 8 6 arp 96 22 0 8 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 717 0 707 10 4 6 6 0 8 5 nd6 112 33 0 16 1 0 1 1 0 8 0 pkpcb 40 7 0 6 2 1 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 9 0 9 2 1 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfstscr 40 6 0 0 1 0 1 1 0 8 0 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 3 0 1 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 8 0 0 1 0 1 1 0 8 0 pfstkey 128 10 0 2 1 0 1 1 0 8 0 pfstate 384 5 0 1 1 0 1 1 0 8 0 pfrule 1360 10 0 9 2 1 1 1 0 8 0 rttmr 136 2 0 1 2 1 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 596 0 226 31 5 26 30 0 8 2 art_table 40 598 0 226 5 0 5 5 0 8 0 art_node 32 145 0 72 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 6 1 0 1 1 0 8 0 semapl 72 24 0 14 1 0 1 1 0 8 0 shmpl 112 43 0 0 2 0 2 2 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2465 0 994 93 0 93 93 0 8 0 ffsino 256 2465 0 994 93 0 93 93 0 8 0 nchpl 144 3346 0 1644 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 2794 0 0 156 0 156 156 0 8 0 namei 1024 10793 0 10793 3 2 1 2 0 8 1 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 47 0 22 3 1 2 3 0 8 0 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 14781 0 14781 9 7 2 8 1 8 2 plimitpl 152 245 0 234 1 0 1 1 0 8 0 sigapl 424 902 0 870 6 1 5 6 0 8 0 knotepl 120 20349 0 20332 22 7 15 15 0 8 12 kqueuepl 184 236 0 233 4 3 1 4 0 8 0 pipepl 304 158 0 131 3 0 3 3 0 8 0 fdescpl 448 888 0 870 5 2 3 5 0 8 0 filepl 120 4890 0 4714 13 4 9 11 0 8 1 lockfpl 104 174 0 172 1 0 1 1 0 8 0 lockfspl 48 78 0 77 1 0 1 1 0 8 0 sessionpl 144 43 0 40 1 0 1 1 0 8 0 pgrppl 48 55 0 44 1 0 1 1 0 8 0 ucredpl 104 721 0 715 1 0 1 1 0 8 0 zombiepl 144 873 0 870 2 1 1 1 0 8 0 processpl 1152 902 0 870 4 0 4 4 0 8 0 procpl 664 1600 0 1558 6 1 5 6 0 8 0 sosppl 176 3 0 3 2 1 1 1 0 8 1 sockpl 552 1270 0 1257 15 9 6 11 0 8 4 mcl64k 65536 27 0 26 2 1 1 1 0 8 0 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl9k128 9344 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 10 0 10 2 1 1 1 0 8 1 mcl4k 4096 3184 0 3133 15 7 8 14 0 8 1 mcl2k 2048 484 0 481 1 0 1 1 0 8 0 mtagpl 96 12 0 5 1 0 1 1 0 8 0 mbufpl 256 8663 0 8512 25 6 19 19 0 8 6 bufpl 272 6256 0 105 411 0 411 411 0 8 0 anonpl 24 144206 0 142616 55 19 36 45 0 186 1 amapchunkpl 152 24395 0 24046 46 14 32 32 0 158 13 amappl16 200 1870 0 1847 15 0 15 15 0 8 7 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 424 0 424 2 1 1 1 0 8 1 amappl13 176 123 0 122 1 0 1 1 0 8 0 amappl12 168 1131 0 1114 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 95 0 95 1 0 1 1 0 8 1 amappl9 144 285 0 285 1 1 0 1 0 8 0 amappl8 136 99 0 98 1 0 1 1 0 8 0 amappl7 128 151 0 148 1 0 1 1 0 8 0 amappl6 120 172 0 172 2 1 1 1 0 8 1 amappl5 112 92 0 91 1 0 1 1 0 8 0 amappl4 104 288 0 285 1 0 1 1 0 8 0 amappl3 96 4514 0 4437 3 0 3 3 0 8 0 amappl2 88 549 0 538 2 0 2 2 0 8 0 amappl1 80 12409 0 12292 13 1 12 13 0 8 4 amappl 88 6102 0 5983 4 0 4 4 0 92 0 uvmvnodes 80 115 0 0 3 0 3 3 0 8 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 128 255 0 255 2 1 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 45 0 0 1 0 1 1 0 8 0 uaddrrnd 24 888 0 870 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 888 0 870 1 0 1 1 0 8 0 vmmpekpl 168 8660 0 8622 2 0 2 2 0 8 0 vmmpepl 168 63399 0 62579 84 17 67 82 0 357 8 vmsppl 368 887 0 870 4 1 3 4 0 8 0 rwobjpl 40 19217 0 18733 11 0 11 11 0 8 0 pdppl 4096 1782 0 1740 102 50 52 80 0 8 10 pvpl 32 401917 0 397526 123 40 83 112 0 265 11 pmappl 216 887 0 870 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 812 0 85 21 0 21 21 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83431cfa) at panic+0x1cf sys/kern/subr_prf.c:198 rw_do_enter_read(ffffffff83ab6a50,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379 uvmfault_lookup(ffff80002a7d13e0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 uvm_fault_check(ffff80002a7d13e0,ffff80002a7d1418,ffff80002a7d1450,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(ffffffff83ab6968,ffff800029ee6000,0,2) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80002a7d1580,ffff800029ee6000) at kpageflttrap+0x2d1 sys/arch/amd64/amd64/trap.c:-1 kerntrap(ffff80002a7d1580) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b kcov_remote_enter(0,ffff80002a793190) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff8394f5b0,ffff80002a737d28) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a737d28,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 memcpy() at memcpy+0x57 uvm_unmap_remove(ffffffff83ab6968,ffff80002a7c4000,ffff80002a7c8000,ffff80002a7d19c8,0,1,e1de20932d5b19cf) at uvm_unmap_remove+0x4fd sys/uvm/uvm_map.c:-1 uvm_unmap(ffffffff83ab6968,ffff80002a7c4000,ffff80002a7c8000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline] uvm_unmap(ffffffff83ab6968,ffff80002a7c4000,ffff80002a7c8000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1799 km_free(ffff80002a7c4000,4000,ffffffff837180c0,ffffffff837181d0) at km_free+0x85 sys/uvm/uvm_km.c:714 pipe_destroy(fffff3006fd5a390) at pipe_destroy+0x265 pipe_buffer_free sys/kern/sys_pipe.c:768 [inline] pipe_destroy(fffff3006fd5a390) at pipe_destroy+0x265 sys/kern/sys_pipe.c:811 pipe_close(fffff3006cf54e98,ffff80002a776540) at pipe_close+0x43 sys/kern/sys_pipe.c:749 fdrop(fffff3006cf54e98,ffff80002a776540) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffff3006cf54e98,ffff80002a776540) at closef+0x190 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a776540) at fdfree+0x115 sys/kern/kern_descrip.c:1196 exit1(ffff80002a776540,1,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a776540,ffff80002a7d1da0,ffff80002a7d1cf0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7d1da0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7d1da0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73dc27cca7e0, count: -29 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83431cfa) at panic+0x1cf sys/kern/subr_prf.c:198 rw_do_enter_read(ffffffff83ab6a50,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379 uvmfault_lookup(ffff80002a7d13e0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 uvm_fault_check(ffff80002a7d13e0,ffff80002a7d1418,ffff80002a7d1450,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(ffffffff83ab6968,ffff800029ee6000,0,2) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80002a7d1580,ffff800029ee6000) at kpageflttrap+0x2d1 sys/arch/amd64/amd64/trap.c:-1 kerntrap(ffff80002a7d1580) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b kcov_remote_enter(0,ffff80002a793190) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff8394f5b0,ffff80002a737d28) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a737d28,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 memcpy() at memcpy+0x57 uvm_unmap_remove(ffffffff83ab6968,ffff80002a7c4000,ffff80002a7c8000,ffff80002a7d19c8,0,1,e1de20932d5b19cf) at uvm_unmap_remove+0x4fd sys/uvm/uvm_map.c:-1 uvm_unmap(ffffffff83ab6968,ffff80002a7c4000,ffff80002a7c8000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline] uvm_unmap(ffffffff83ab6968,ffff80002a7c4000,ffff80002a7c8000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1799 km_free(ffff80002a7c4000,4000,ffffffff837180c0,ffffffff837181d0) at km_free+0x85 sys/uvm/uvm_km.c:714 pipe_destroy(fffff3006fd5a390) at pipe_destroy+0x265 pipe_buffer_free sys/kern/sys_pipe.c:768 [inline] pipe_destroy(fffff3006fd5a390) at pipe_destroy+0x265 sys/kern/sys_pipe.c:811 pipe_close(fffff3006cf54e98,ffff80002a776540) at pipe_close+0x43 sys/kern/sys_pipe.c:749 fdrop(fffff3006cf54e98,ffff80002a776540) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffff3006cf54e98,ffff80002a776540) at closef+0x190 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a776540) at fdfree+0x115 sys/kern/kern_descrip.c:1196 exit1(ffff80002a776540,1,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a776540,ffff80002a7d1da0,ffff80002a7d1cf0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7d1da0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7d1da0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x73dc27cca7e0, count: -29 ddb>