login: uvm_fault(0xuvm_fault(0xffffffff83aa38c8, 0xffff800029ed6000, 0, 2) -> e kernel: page fault trap, code=2 Stopped at kcov_remote_enter+0x122: movq $0,0(%rcx) TID PID UID PRFLAGS PFLAGS CPU COMMAND *184817 37639 0 0 0x4000000 0 syz-executor kcov_remote_enter(0,ffff807fffffba98) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838eabb0,ffff8000300a0b10) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff8000300a0b10,0) 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 Xspllower() at Xspllower+0x1d cnputc(78) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(78) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8342a11a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff834e58c5) at fault+0xa3 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a7a77f0,ffff800029eb2004) at kpageflttrap+0x353 sys/arch/amd64/amd64/trap.c:296 end trace frame: 0xffff80002a7a77e0, 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: uvm_fault(0xffffffff83aa38c8, 0xffff800029ed6000, 0, 2) -> e ddb> trace kcov_remote_enter(0,ffff807fffffba98) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838eabb0,ffff8000300a0b10) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff8000300a0b10,0) 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 Xspllower() at Xspllower+0x1d cnputc(78) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(78) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8342a11a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff834e58c5) at fault+0xa3 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a7a77f0,ffff800029eb2004) at kpageflttrap+0x353 sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a7a77f0) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff480703ab570,ffff80002a7a7b90,ffff80002a7a7bc0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a7a7b60) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a7a7b60) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dofstatat(ffff80002a7274c8,ffffff9c,200000000400,200000000440,2) at dofstatat+0xe4 sys/kern/vfs_syscalls.c:2024 syscall(ffff80002a7a7dc0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7a7dc0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb1dac97b8e0, count: -23 ddb> show registers rdi 0 rsi 0xffff800000c16c00 rbp 0xffff80002a7a71d0 rbx 0xffff807fffffba98 rdx 0xffff80002a7274c8 rcx 0xffff800029ed6000 rax 0xfffff4806be01d80 r8 0x10 r9 0x8080808080808080 r10 0x607bf79dcb4f1457 r11 0x82e638658953ce70 r12 0xffffffff825bb980 endtsleep r13 0xffff8000300a0a78 r14 0xffff807fffffba98 r15 0 rip 0xffffffff81448272 kcov_remote_enter+0x122 cs 0x8 rflags 0x10297 __ALIGN_SIZE+0xf297 rsp 0xffff80002a7a71b0 ss 0x10 kcov_remote_enter+0x122: movq $0,0(%rcx) ddb> show proc PROC (syz-executor) tid=184817 pid=37639 tcnt=2 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=0xffff80002a7279f8,0xffff80002a7267e0 process=0xffff807fffff8918 user=0xffff80002a7a2000, vmspace=0xfffff4806bc5f018 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 89388 192427 10863 0 2 0 syz-executor 89388 295489 10863 0 3 0x4000080 fsleep syz-executor 52897 209580 54639 0 2 0x40 syz-executor 37639 519903 371 0 2 0 syz-executor *37639 184817 371 0 7 0x4000000 syz-executor 39254 27568 47546 0 2 0x1 syz-executor 39254 76881 47546 0 3 0x4000081 fsleep syz-executor 11255 42833 56958 0 2 0 syz-executor 11255 472690 56958 0 3 0x4000080 fsleep syz-executor 57710 199769 86087 0 2 0 syz-executor 57710 150998 86087 0 2 0x4000000 syz-executor 57710 295300 86087 0 2 0x4000000 syz-executor 95785 43439 74208 0 2 0 syz-executor 95785 190907 74208 0 2 0x4000000 syz-executor 56999 75575 6862 0 3 0x80 nanoslp syz-executor 56999 216860 6862 0 3 0x4000080 ttyout syz-executor 56999 507681 6862 0 3 0x4000080 ttyout syz-executor 56999 492374 6862 0 3 0x4000080 fsleep syz-executor 54639 279692 26407 0 3 0x82 ppwait syz-executor 96449 110406 1 0 3 0x100083 ttyin getty 6862 65249 26407 0 3 0x82 nanoslp syz-executor 10863 302834 26407 0 3 0x82 nanoslp syz-executor 371 453967 26407 0 3 0x82 nanoslp syz-executor 74208 464007 26407 0 3 0x82 nanoslp syz-executor 86087 87277 26407 0 3 0x82 nanoslp syz-executor 47546 488865 26407 0 3 0x82 nanoslp syz-executor 56958 448881 26407 0 3 0x82 nanoslp syz-executor 26407 367031 1 0 3 0x82 kqread syz-executor 11965 4739 0 0 3 0x14200 bored smr 78990 337099 0 0 2 0x14200 zerothread 2747 313367 0 0 3 0x14200 aiodoned aiodoned 82292 293846 0 0 3 0x14200 syncer update 81314 439757 0 0 3 0x14200 cleaner cleaner 3264 410308 0 0 3 0x14200 reaper reaper 4025 218296 0 0 3 0x14200 pgdaemon pagedaemon 5703 192055 0 0 3 0x14200 bored viomb 644 204744 0 0 3 0x40014200 acpi0 acpi0 40603 116680 0 0 3 0x14200 bored softnet0 34881 130258 0 0 3 0x14200 bored systqmp 97019 403448 0 0 3 0x14200 bored systq 68958 153538 0 0 3 0x40014200 tmoslp softclock 76834 169654 0 0 3 0x40014200 idle0 1 462898 0 0 3 0x80082 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 11031 12101K 12380K 166960K 13011 0 pcb 17 14K 16K 166960K 214 0 rtable 202 10K 11K 166960K 1053 0 pf 36 14K 94K 166960K 154 0 ifaddr 35 6K 7K 166960K 148 0 ifgroup 50 2K 2K 166960K 174 0 sysctl 3 1K 9K 166960K 7 0 counters 33 17K 18K 166960K 77 0 ioctlops 0 0K 4K 166960K 146 0 iov 0 0K 12K 166960K 54 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1362 86K 86K 166960K 2004 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 20K 36K 166960K 14 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 32 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 65K 89K 166960K 930 0 sigio 0 0K 0K 166960K 3 0 proc 20 25K 83K 166960K 1158 0 subproc 72 4K 4K 166960K 261 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 46 0 in_multi 76 5K 7K 166960K 330 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 27 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 744 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 131 82K 167K 166960K 8840 0 UVM aobj 12 3K 3K 166960K 14 0 pinsyscall 20 40K 92K 166960K 2575 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 24 0 NDP 11 0K 2K 166960K 105 0 temp 55 9115K 9178K 166960K 27700 0 kqueue 2 4K 37K 166960K 129 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 98 0 98 1 0 1 1 0 8 1 rtentry 136 351 0 273 5 0 5 5 0 8 0 unpcb 144 306 0 306 4 0 4 4 0 8 4 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 314 0 313 7 0 7 7 0 8 6 arp 96 62 0 47 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 328 854 0 853 7 0 7 7 0 8 6 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 6 0 4 1 0 1 1 0 8 0 nd6 112 90 0 71 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 29 0 21 1 0 1 1 0 8 0 ppxss 1072 20 0 20 1 0 1 1 0 8 1 pfstscr 40 4 0 0 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 1 1 0 1 1 0 8 0 pfrktable 1344 4 0 1 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 5 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 6 0 0 1 0 1 1 0 8 0 pfstkey 128 10 0 4 1 0 1 1 0 8 0 pfstate 384 5 0 2 1 0 1 1 0 8 0 pfrule 1360 4 0 3 1 0 1 1 0 8 0 rttmr 136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1473 0 1108 32 0 32 32 0 8 5 art_table 40 1475 0 1108 6 0 6 6 0 8 0 art_node 32 351 0 281 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semapl 72 27 0 17 1 0 1 1 0 8 0 shmpl 112 11 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2492 0 977 95 0 95 95 0 8 0 ffsino 256 2492 0 977 95 0 95 95 0 8 0 nchpl 144 3339 0 1557 67 0 67 67 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 3036 0 0 169 0 169 169 0 8 0 namei 1024 13217 0 13216 2 0 2 2 0 8 1 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 97 0 74 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 16651 0 16651 8 0 8 8 1 8 8 plimitpl 152 177 0 167 1 0 1 1 0 8 0 sigapl 424 1185 0 1152 6 0 6 6 0 8 1 knotepl 120 27754 0 27529 10 0 10 10 0 8 3 kqueuepl 184 182 0 180 2 0 2 2 0 8 1 pipepl 304 197 0 170 3 0 3 3 0 8 0 fdescpl 448 1172 0 1152 5 0 5 5 0 8 1 filepl 120 5525 0 5362 13 0 13 13 0 8 6 lockfpl 104 412 0 412 2 0 2 2 0 8 2 lockfspl 48 89 0 89 1 0 1 1 0 8 1 sessionpl 144 107 0 103 1 0 1 1 0 8 0 pgrppl 48 139 0 127 1 0 1 1 0 8 0 ucredpl 104 716 0 713 1 0 1 1 0 8 0 zombiepl 144 1152 0 1152 1 0 1 1 0 8 1 processpl 1152 1185 0 1152 4 0 4 4 0 8 0 procpl 664 1947 0 1904 6 0 6 6 0 8 2 sosppl 176 3 0 3 1 0 1 1 0 8 1 sockpl 552 1292 0 1291 8 0 8 8 0 8 7 mcl64k 65536 34 0 31 1 0 1 1 0 8 0 mcl16k 16384 4 0 4 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 14 0 14 1 0 1 1 0 8 1 mcl4k 4096 3181 0 3124 16 0 16 16 0 8 8 mcl2k 2048 691 0 690 4 0 4 4 0 8 3 mtagpl 96 9 0 5 1 0 1 1 0 8 0 mbufpl 256 11334 0 11161 25 3 22 25 0 8 8 bufpl 272 6972 0 757 415 0 415 415 0 8 0 anonpl 24 188196 0 186621 44 0 44 44 0 88 21 amapchunkpl 152 27623 0 27266 29 0 29 29 0 158 15 amappl16 200 3259 0 3238 20 9 11 14 0 8 8 amappl15 192 2 0 2 1 0 1 1 0 8 1 amappl14 184 670 0 670 1 0 1 1 0 8 1 amappl13 176 163 0 162 1 0 1 1 0 8 0 amappl12 168 1490 0 1472 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 0 1 1 0 8 1 amappl10 152 60 0 60 1 0 1 1 0 8 1 amappl9 144 275 0 275 1 0 1 1 0 8 1 amappl8 136 178 0 178 1 0 1 1 0 8 1 amappl7 128 197 0 195 1 0 1 1 0 8 0 amappl6 120 354 0 354 1 0 1 1 0 8 1 amappl5 112 91 0 90 1 0 1 1 0 8 0 amappl4 104 323 0 319 1 0 1 1 0 8 0 amappl3 96 5427 0 5346 4 0 4 4 0 8 1 amappl2 88 699 0 689 2 0 2 2 0 8 0 amappl1 80 14727 0 14612 13 0 13 13 0 8 6 amappl 88 7667 0 7550 5 0 5 5 0 92 0 uvmvnodes 80 110 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 1 0 1 1 0 8 1 dma128 128 254 0 254 1 0 1 1 0 8 1 dma64 64 7 0 7 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 13 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1172 0 1152 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1172 0 1152 1 0 1 1 0 8 0 vmmpekpl 168 10406 0 10374 3 0 3 3 0 8 0 vmmpepl 168 82074 0 81192 89 0 89 89 0 357 47 vmsppl 368 1171 0 1152 4 0 4 4 0 8 1 rwobjpl 40 24850 0 24415 12 0 12 12 0 8 1 pdppl 4096 2350 0 2304 124 76 48 78 0 8 2 pvpl 32 512979 0 508446 111 0 111 111 0 265 53 pmappl 216 1171 0 1152 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 837 0 79 23 0 23 23 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace kcov_remote_enter(0,ffff807fffffba98) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838eabb0,ffff8000300a0b10) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff8000300a0b10,0) 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 Xspllower() at Xspllower+0x1d cnputc(78) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(78) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8342a11a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff834e58c5) at fault+0xa3 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a7a77f0,ffff800029eb2004) at kpageflttrap+0x353 sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a7a77f0) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff480703ab570,ffff80002a7a7b90,ffff80002a7a7bc0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a7a7b60) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a7a7b60) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dofstatat(ffff80002a7274c8,ffffff9c,200000000400,200000000440,2) at dofstatat+0xe4 sys/kern/vfs_syscalls.c:2024 syscall(ffff80002a7a7dc0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7a7dc0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb1dac97b8e0, count: -23 ddb> machine ddbcpu 1 No such command ddb> trace kcov_remote_enter(0,ffff807fffffba98) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838eabb0,ffff8000300a0b10) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff8000300a0b10,0) 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 Xspllower() at Xspllower+0x1d cnputc(78) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(78) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8342a11a) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff834e58c5) at fault+0xa3 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a7a77f0,ffff800029eb2004) at kpageflttrap+0x353 sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a7a77f0) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b ufs_lookup() at ufs_lookup+0x613 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffff480703ab570,ffff80002a7a7b90,ffff80002a7a7bc0) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a7a7b60) at vfs_lookup+0x94a sys/kern/vfs_lookup.c:580 namei(ffff80002a7a7b60) at namei+0x7c3 sys/kern/vfs_lookup.c:250 dofstatat(ffff80002a7274c8,ffffff9c,200000000400,200000000440,2) at dofstatat+0xe4 sys/kern/vfs_syscalls.c:2024 syscall(ffff80002a7a7dc0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7a7dc0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb1dac97b8e0, count: -23 ddb>