uvm_fault(0xfffffd8060c193e8, 0x0, 0, 1) -> e fatal WpaAR NfIaNuGl: PLn sOpTer LsoErR EDmod OeN StYSCALL 91 327613160 EXIT 0 d Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *184931 69945 0 0x2 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7d561386fad0, 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(0xfffffd8060c193e8, 0x0, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7d561386fad0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a31c220 rbx 0 rdx 0 rcx 0xffff80002a2a4538 rax 0x3a r8 0xffff80002a31c150 r9 0xffff80002a31be18 r10 0xf9e000b627f5d7c8 r11 0x6d46638e5dd131c6 r12 0 r13 0 r14 0xffff80002a2a4538 r15 0 rip 0xffffffff81c8b3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a31c1a0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=184931 pid=69945 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2a4018,0xffff80002a2a4a68 process=0xffff8000ffff4e30 user=0xffff80002a317000, vmspace=0xfffffd8009eda960 estcpu=36, cpticks=0, pctcpu=0.8, user=2, sys=48, intr=3 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51264 453552 12823 0 2 0 syz-executor 51264 148524 12823 0 3 0x4000080 fsleep syz-executor 46543 34880 95146 0 2 0 syz-executor 46543 470352 95146 0 2 0x4000000 syz-executor 45695 2632 13978 0 2 0 syz-executor 45695 359118 13978 0 3 0x4000080 kqread syz-executor 45695 265690 13978 0 2 0x4000000 syz-executor 41903 410334 13472 0 2 0x10 syz-executor 41903 491910 13472 0 3 0x4000090 fsleep syz-executor 9859 31456 69945 -1 2 0x10 syz-executor 9859 423187 69945 -1 3 0x4000090 kqsel syz-executor 9859 454529 69945 -1 3 0x4000090 fsleep syz-executor 43530 114697 59555 0 3 0x80 nanoslp syz-executor 43530 117569 59555 0 3 0x4000080 ttyin syz-executor 43530 216479 59555 0 3 0x4000080 ttyin syz-executor 43530 111858 59555 0 3 0x4000080 fsleep syz-executor 75471 356025 0 0 3 0x14200 acct acct 95146 131212 79441 0 3 0x82 nanoslp syz-executor 16761 437602 79441 0 3 0x82 nanoslp syz-executor 32645 281289 79441 0 3 0x82 nanoslp syz-executor 56564 104593 1 0 3 0x80 nanoslp init 13978 237852 79441 0 3 0x82 nanoslp syz-executor 29364 292162 0 0 3 0x14200 bored sosplice 12823 136788 79441 0 3 0x82 nanoslp syz-executor 13472 156210 79441 0 3 0x82 nanoslp syz-executor 59555 416484 79441 0 3 0x82 nanoslp syz-executor *69945 184931 79441 0 7 0x2 syz-executor 79441 164987 74318 0 3 0x82 kqread syz-executor 74318 398063 96873 0 3 0x10008a sigsusp ksh 96873 274882 95193 0 3 0x98 kqread sshd-session 95193 516479 56272 0 3 0x92 kqread sshd-session 56272 124760 1 0 3 0x88 kqread sshd 23710 383578 8901 74 3 0x1100092 bpf pflogd 8901 79852 1 0 3 0x80 sbwait pflogd 19813 169755 82521 73 3 0x1100090 kqread syslogd 82521 134419 1 0 3 0x100082 sbwait syslogd 67788 144084 1 0 3 0x100080 kqread resolvd 66853 96581 60202 77 3 0x100092 kqread dhcpleased 72395 19015 60202 77 3 0x100092 kqread dhcpleased 60202 407714 1 0 3 0x80 kqread dhcpleased 76265 223769 0 0 3 0x14200 bored smr 29799 45504 0 0 2 0x14200 zerothread 45508 187840 0 0 3 0x14200 aiodoned aiodoned 78751 127458 0 0 3 0x14200 syncer update 39195 433017 0 0 3 0x14200 cleaner cleaner 46611 5545 0 0 3 0x14200 reaper reaper 99120 199490 0 0 3 0x14200 pgdaemon pagedaemon 69898 500752 0 0 3 0x14200 bored viomb 47799 368713 0 0 3 0x40014200 acpi0 acpi0 89089 285964 0 0 3 0x40014200 idle1 60812 183838 0 0 3 0x14200 bored softnet3 81907 233449 0 0 3 0x14200 bored softnet2 50152 85198 0 0 3 0x14200 bored softnet1 23557 398806 0 0 3 0x14200 bored softnet0 90108 44344 0 0 3 0x14200 bored systqmp 55908 116933 0 0 3 0x14200 bored systq 66360 321733 0 0 3 0x14200 tmoslp softclockmp 76998 194182 0 0 3 0x40014200 tmoslp softclock 70047 383040 0 0 3 0x40014200 idle0 1 412956 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &kq->kq_lock r = 0 (0xfffffd806ec4e390) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 kqueue_scan+0x9e5 sys/kern/kern_event.c:1786 #4 doppoll+0x36a sys/kern/sys_generic.c:988 #5 sys_poll+0xd8 sys/kern/sys_generic.c:-1 #6 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10256 11230K 11462K 166960K 14746 0 pcb 18 16K 18K 166960K 451 0 rtable 216 13K 14K 166960K 665 0 pf 38 18K 23K 166960K 175 0 ifaddr 37 6K 8K 166960K 118 0 ifgroup 54 2K 3K 166960K 209 0 sysctl 4 1K 9K 166960K 76 0 counters 66 36K 37K 166960K 270 0 ioctlops 0 0K 4K 166960K 1884 0 iov 0 0K 16K 166960K 148 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1430 90K 90K 166960K 3472 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 14K 18K 166960K 47 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 113 0 dirhash 15 2K 3K 166960K 51 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 2053 0 sigio 0 0K 0K 166960K 102 0 proc 64 79K 115K 166960K 882 0 subproc 72 4K 4K 166960K 119 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 521 0 in_multi 77 5K 7K 166960K 227 0 ether_multi 1 0K 0K 166960K 15 0 mrt 3 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 712 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 253 152K 168K 166960K 19873 0 UVM aobj 25 2K 4K 166960K 32 0 pinsyscall 42 84K 106K 166960K 3278 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 102 0 NDP 11 0K 1K 166960K 81 0 temp 78 8684K 8812K 166960K 86984 0 kqueue 16 24K 32K 166960K 358 0 SYN cache 2 16K 16K 166960K 2 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 120 152 0 147 1 0 1 1 0 8 0 rtentry 176 205 0 120 6 0 6 6 0 8 0 unpcb 144 2031 0 2010 21 15 6 9 0 8 5 syncache 336 8 0 8 3 3 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 808 729 0 722 11 9 2 8 0 8 1 arp 128 33 0 16 1 0 1 1 0 8 0 inpcb 384 2704 0 2690 29 17 12 12 0 8 10 nd6 144 48 0 26 2 0 2 2 0 8 0 pkpcb 40 21 0 21 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 78 0 78 2 1 1 1 0 8 1 pppxif 1504 7 0 7 3 2 1 1 0 8 1 pffrag 232 16 0 4 1 0 1 1 0 482 0 pffrnode 88 15 0 4 1 0 1 1 0 8 0 pffrent 40 33 0 21 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 6 0 1 1 0 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 5 0 0 1 0 1 1 0 8 0 pfstitem 24 121 0 48 1 0 1 1 0 8 0 pfstkey 128 121 0 48 3 0 3 3 0 8 0 pfstate 384 121 0 48 8 0 8 8 0 8 0 pfrule 1344 31 0 21 2 1 1 2 0 8 0 rttmr 136 4 0 4 3 3 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 932 0 551 34 7 27 31 0 8 2 art_table 32 935 0 551 4 0 4 4 0 8 0 art_node 16 200 0 126 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 5 1 0 1 1 0 8 0 semapl 112 73 0 63 1 0 1 1 0 8 0 shmpl 112 29 0 7 1 0 1 1 0 8 0 dirhash 1024 43 0 24 3 0 3 3 0 8 0 dino2pl 256 5153 0 3645 95 0 95 95 0 8 0 ffsino 288 5153 0 3645 109 0 109 109 0 8 0 nchpl 144 7955 0 6246 64 0 64 64 0 8 0 rtmask 32 14 0 14 2 2 0 1 0 8 0 uvmvnodes 80 2414 0 0 50 0 50 50 0 8 0 vnodes 216 2414 0 0 135 0 135 135 0 8 0 namei 1024 28395 0 28395 2 1 1 2 0 8 1 percpumem 16 150 0 102 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 114 0 88 3 0 3 3 0 8 0 scsiplug 72 6 0 6 2 2 0 1 0 8 0 scxspl 216 23361 0 23361 15 12 3 8 1 8 3 plimitpl 152 311 0 295 1 0 1 1 0 8 0 sigapl 424 2339 0 2287 7 0 7 7 0 8 0 knotepl 120 746 0 0 23 0 23 23 0 8 0 kqueuepl 224 812 0 799 10 7 3 5 0 8 2 pipepl 336 398 0 368 8 5 3 8 0 8 0 fdescpl 520 2317 0 2285 3 0 3 3 0 8 0 filepl 160 16577 0 16335 32 17 15 22 0 8 2 lockfpl 104 463 0 460 1 0 1 1 0 8 0 lockfspl 48 198 0 195 1 0 1 1 0 8 0 sessionpl 144 33 0 25 1 0 1 1 0 8 0 pgrppl 48 74 0 58 1 0 1 1 0 8 0 ucredpl 104 2588 0 2572 1 0 1 1 0 8 0 zombiepl 144 2289 0 2287 2 1 1 1 0 8 0 processpl 1208 2339 0 2287 5 0 5 5 0 8 0 procpl 656 5435 0 5373 6 0 6 6 0 8 0 srpgc 96 14 0 14 4 3 1 1 0 8 1 sosppl 168 12 0 12 2 2 0 1 0 8 0 sockpl 728 4942 0 4903 62 49 13 25 0 8 9 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 31 0 0 4 0 4 4 0 8 0 mtagpl 96 113 0 0 3 0 3 3 0 8 0 mbufpl 256 2767 0 0 172 0 172 172 0 8 0 bufpl 280 6191 0 145 432 0 432 432 0 8 0 anonpl 32 9888 0 0 80 0 80 80 0 246 0 amapchunkpl 152 66411 0 65808 45 12 33 34 0 158 9 amappl16 200 4871 0 4767 38 23 15 19 0 8 4 amappl15 192 7 0 7 3 2 1 1 0 8 1 amappl14 184 202 0 191 1 0 1 1 0 8 0 amappl13 176 23 0 23 1 1 0 1 0 8 0 amappl12 168 3054 0 3023 4 2 2 3 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 57 0 54 1 0 1 1 0 8 0 amappl7 128 126 0 113 1 0 1 1 0 8 0 amappl6 120 232 0 228 1 0 1 1 0 8 0 amappl5 112 146 0 134 1 0 1 1 0 8 0 amappl4 104 358 0 337 1 0 1 1 0 8 0 amappl3 96 13744 0 13624 5 1 4 4 0 8 0 amappl2 88 752 0 690 2 0 2 2 0 8 0 amappl1 80 17316 0 16728 17 2 15 16 0 8 0 amappl 88 18716 0 18531 5 0 5 5 0 92 0 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 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 31 0 7 1 0 1 1 0 8 0 uaddrrnd 24 2317 0 2285 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2317 0 2285 1 0 1 1 0 8 0 vmmpekpl 168 19048 0 18995 3 0 3 3 0 8 0 vmmpepl 168 145761 0 143657 113 16 97 101 0 357 2 vmsppl 480 2316 0 2285 6 1 5 5 0 8 0 rwobjpl 72 38394 0 34951 70 5 65 67 0 8 0 pdppl 4096 4641 0 4570 129 58 71 87 0 8 0 pvpl 32 19180 0 0 156 1 155 156 0 265 0 pmappl 256 2316 0 2285 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 599 0 87 15 0 15 15 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83878ff0) 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 __mp_lock(ffffffff83928300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83928300) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsoftclock() at Xsoftclock+0x27 cnputc(74) at cnputc+0x61 sys/dev/cons.c:218 kputchar(74,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff834021f5) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80002a40ba80,6) at trap_print+0x12e rdmsr machine/cpufunc.h:-1 [inline] trap_print(ffff80002a40ba80,6) at trap_print+0x12e sys/arch/amd64/amd64/trap.c:467 kerntrap(ffff80002a40ba80) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80002a40bb60, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83878ff0) 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 __mp_lock(ffffffff83928300) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83928300) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x12a sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:840 Xsoftclock() at Xsoftclock+0x27 cnputc(74) at cnputc+0x61 sys/dev/cons.c:218 kputchar(74,5,0) at kputchar+0x2cc sys/kern/subr_prf.c:367 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 printf(ffffffff834021f5) at printf+0x8b sys/kern/subr_prf.c:529 trap_print(ffff80002a40ba80,6) at trap_print+0x12e rdmsr machine/cpufunc.h:-1 [inline] trap_print(ffff80002a40ba80,6) at trap_print+0x12e sys/arch/amd64/amd64/trap.c:467 kerntrap(ffff80002a40ba80) at kerntrap+0x276 sys/arch/amd64/amd64/trap.c:328 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001488000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(21e5f,81,2000,ffff8000ffffd488) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff8000ffffd488) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a40bc30) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805e37fcc0,81,fffffd807f7d34e0,ffff8000ffffd488) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806a3ffc40,ffff8000ffffd488) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806a3ffc40,ffff8000ffffd488) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806a3ffc40,ffff8000ffffd488) at fdrop+0x126 sys/kern/kern_descrip.c:1267 closef(fffffd806a3ffc40,ffff8000ffffd488) at closef+0x192 sys/kern/kern_descrip.c:1251 fdfree(ffff8000ffffd488) at fdfree+0x116 sys/kern/kern_descrip.c:1182 exit1(ffff8000ffffd488,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffffd488,ffff80002a40bfa0,ffff80002a40bef0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a40bfa0) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a40bfa0) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79a7f7eb6d10, count: -26 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7d561386fad0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7d561386fad0, count: -1