uvm_fault(0xffffffff839bb408, 0xffff800026bf2000, 0, 1) -> d kernel: page fault trap, code=0 Stopped at memcpy+0x19: repe movsq (%rsi),%es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *171242 52216 0 0 0x4000000 0 syz-executor 136319 1602 0 0x2 0 1 syz-executor memcpy() at memcpy+0x19 readdisklabel(d02,ffffffff811f66f0,ffff8000015fa800,0) at readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96 sdgetdisklabel(d01,ffff8000002a2c00,ffff8000015fa800,0) at sdgetdisklabel+0x897 sys/scsi/sd.c:1169 sdioctl(d01,20006473,ffff80002a2ceb50,1,ffff8000ffff2018) at sdioctl+0x6fb sys/scsi/sd.c:883 VOP_IOCTL(fffffd80623e46c8,20006473,ffff80002a2ceb50,1,fffffd80097fd4e0,ffff8000ffff2018) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c755868,20006473,ffff80002a2ceb50,ffff8000ffff2018) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff2018,ffff80002a2ced30,ffff80002a2cec80) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a2ced30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2ced30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x122cb5b0580, count: 6 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 *cpu0: uvm_fault(0xffffffff839bb408, 0xffff800026bf2000, 0, 1) -> d ddb{0}> trace memcpy() at memcpy+0x19 readdisklabel(d02,ffffffff811f66f0,ffff8000015fa800,0) at readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96 sdgetdisklabel(d01,ffff8000002a2c00,ffff8000015fa800,0) at sdgetdisklabel+0x897 sys/scsi/sd.c:1169 sdioctl(d01,20006473,ffff80002a2ceb50,1,ffff8000ffff2018) at sdioctl+0x6fb sys/scsi/sd.c:883 VOP_IOCTL(fffffd80623e46c8,20006473,ffff80002a2ceb50,1,fffffd80097fd4e0,ffff8000ffff2018) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c755868,20006473,ffff80002a2ceb50,ffff8000ffff2018) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff2018,ffff80002a2ced30,ffff80002a2cec80) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a2ced30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2ced30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x122cb5b0580, count: -9 ddb{0}> show registers rdi 0xffff80002a2ce510 rsi 0xffff800026bf2000 rbp 0xffff80002a2ce7a0 rbx 0xffff80002a2ce510 rdx 0x200 rcx 0x40 rax 0xffffffff83890ff0 cpu_info_full_primary+0x1ff0 r8 0xffff80003c413288 r9 0 r10 0xef58b35ec5ce731b r11 0xffff80002a2ce510 r12 0xffff8000015fa800 r13 0 r14 0 r15 0xfffffd80626bfc20 rip 0xffffffff82e20119 memcpy+0x19 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a2ce508 ss 0x10 memcpy+0x19: repe movsq (%rsi),%es:(%rdi) ddb{0}> show proc PROC (syz-executor) tid=171242 pid=52216 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff3a08,0xffff8000ffff3250 process=0xffff80003c3f5360 user=0xffff80002a2c9000, vmspace=0xfffffd806c8d07b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4614 26050 78815 0 2 0 syz-executor 52216 438767 26541 0 2 0 syz-executor 52216 406620 26541 0 2 0x4000000 syz-executor *52216 171242 26541 0 7 0x4000000 syz-executor 52216 346882 26541 0 3 0x4000080 fsleep syz-executor 17549 49080 1602 0 2 0 syz-executor 17549 193293 1602 0 2 0x4000000 syz-executor 38254 254941 81033 0 2 0xc80 syz-executor 38254 199820 81033 0 3 0x4000000 smrbar syz-executor 14577 422291 0 0 3 0x14200 acct acct 77062 502845 95943 0 2 0xc80 syz-executor 77062 427129 95943 0 3 0x4000080 fsleep syz-executor 77062 324119 95943 0 2 0x4000000 syz-executor 77697 166753 25859 0 2 0xc82 syz-executor 1602 136319 25859 0 7 0x2 syz-executor 81033 15872 25859 0 2 0x2 syz-executor 78815 150891 25859 0 2 0xc82 syz-executor 70175 248204 25859 0 3 0x82 wait syz-executor 26541 293215 25859 0 2 0xc82 syz-executor 95943 304264 25859 0 2 0xc82 syz-executor 25859 177525 9965 0 2 0x82 syz-executor 9965 205536 77208 0 3 0x10008a sigsusp ksh 77208 111398 48835 0 3 0x98 kqread sshd-session 48835 285400 83698 0 3 0x92 kqread sshd-session 97223 480551 1 0 3 0x100083 ttyopn getty 83698 213627 1 0 3 0x88 kqread sshd 32429 503188 74440 74 3 0x1100092 bpf pflogd 74440 376401 1 0 3 0x80 sbwait pflogd 88336 391943 74585 73 3 0x1100090 kqread syslogd 74585 196855 1 0 3 0x100082 sbwait syslogd 65922 22691 1 0 3 0x100080 kqread resolvd 64210 516910 888 77 3 0x100092 kqread dhcpleased 10990 201058 888 77 3 0x100092 kqread dhcpleased 888 57879 1 0 3 0x80 kqread dhcpleased 43363 86385 0 0 2 0x40014200 smr 18128 255287 0 0 3 0x14200 pgzero zerothread 95194 81989 0 0 3 0x14200 aiodoned aiodoned 63381 434496 0 0 3 0x14200 syncer update 40151 488868 0 0 3 0x14200 cleaner cleaner 61408 283941 0 0 3 0x14200 reaper reaper 26808 198127 0 0 3 0x14200 pgdaemon pagedaemon 96550 508834 0 0 3 0x14200 bored viomb 29196 386387 0 0 3 0x40014200 acpi0 acpi0 37029 3161 0 0 3 0x40014200 idle1 97028 287366 0 0 3 0x14200 bored softnet1 82754 480588 0 0 3 0x14200 bored softnet0 89214 481582 0 0 3 0x14200 bored systqmp 58811 102408 0 0 3 0x14200 bored systq 62993 285882 0 0 3 0x14200 tmoslp softclockmp 1423 86051 0 0 3 0x40014200 tmoslp softclock 49143 102837 0 0 3 0x40014200 idle0 1 409793 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 52216 (syz-executor) thread 0xffff8000ffff2018 (171242) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83aaad40) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 biowait+0xc6 sys/kern/vfs_bio.c:1242 #4 readdoslabel+0x98 readdisksector sys/kern/subr_disk.c:298 [inline] #4 readdoslabel+0x98 sys/kern/subr_disk.c:328 #5 readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96 #6 sdgetdisklabel+0x897 sys/scsi/sd.c:1169 #7 sdioctl+0x6fb sys/scsi/sd.c:883 #8 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #9 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 #10 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #12 Xsyscall+0x128 Process 38254 (syz-executor) thread 0xffff8000fffeb778 (199820) exclusive rwlock clonelk r = 0 (0xffffffff8386f878) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 if_clone_destroy+0x93 sys/net/if.c:-1 #3 tun_dev_close+0x1d9 sys/net/if_tun.c:530 #4 spec_close+0x417 sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #6 vn_close+0xa3 sys/kern/vfs_vnops.c:292 #7 sys_ktrace+0x14e sys/kern/kern_ktrace.c:561 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11235 12297K 12351K 166960K 12961 0 pcb 17 13K 14K 166960K 149 0 rtable 194 9K 12K 166960K 788 0 pf 38 18K 22K 166960K 128 0 ifaddr 36 6K 7K 166960K 71 0 ifgroup 55 2K 2K 166960K 101 0 sysctl 4 1K 9K 166960K 16 0 counters 68 36K 37K 166960K 104 0 ioctlops 0 0K 4K 166960K 1663 0 iov 0 0K 24K 166960K 29 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1351 85K 85K 166960K 1856 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 25 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 642 0 sigio 0 0K 0K 166960K 2 0 proc 72 115K 163K 166960K 647 0 subproc 72 4K 4K 166960K 91 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 58 0 in_multi 74 5K 7K 166960K 149 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 21 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 494 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 237 167K 197K 166960K 7556 0 UVM aobj 18 2K 2K 166960K 18 0 pinsyscall 42 84K 104K 166960K 1920 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 11 0K 2K 166960K 44 0 temp 57 9081K 9151K 166960K 18491 0 kqueue 13 20K 33K 166960K 113 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 68 0 65 1 0 1 1 0 8 0 rtentry 176 285 0 206 6 1 5 6 0 8 0 unpcb 144 387 0 370 6 4 2 6 0 8 1 syncache 336 9 0 9 1 0 1 1 0 8 1 tcpcb 736 105 0 101 1 0 1 1 0 8 0 arp 136 89 0 74 1 0 1 1 0 8 0 ipq 40 7 0 0 1 0 1 1 0 8 0 ipqe 40 13 0 6 1 0 1 1 0 8 0 inpcb 328 468 0 461 6 3 3 6 0 8 2 nd6 152 32 0 12 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 10 0 10 1 0 1 1 0 8 1 pppxif 1576 3 0 3 2 1 1 1 0 8 1 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 pfosfp 40 1435 0 1011 5 0 5 5 0 8 0 pfosfpen 112 1435 0 720 21 0 21 21 0 8 0 pfrktable 1344 11 0 10 1 0 1 1 0 8 0 pfsrclim 320 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 5 0 2 1 0 1 1 0 8 0 pftag 88 4 0 4 1 0 1 1 0 8 1 pfstitem 24 37 0 4 1 0 1 1 0 8 0 pfstkey 128 39 0 6 2 0 2 2 0 8 0 pfstate 448 37 0 5 4 0 4 4 0 8 0 pfrule 1360 36 0 26 2 0 2 2 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 256 810 0 473 32 2 30 32 0 8 5 art_table 40 812 0 473 6 0 6 6 0 8 0 art_node 32 284 0 216 2 0 2 2 0 8 0 sysvmsgpl 40 9 0 1 1 0 1 1 0 8 0 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 15 0 0 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2454 0 988 93 0 93 93 0 8 0 ffsino 296 2454 0 988 114 0 114 114 0 8 0 nchpl 144 3363 0 1654 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 vnodes 216 2872 0 0 160 0 160 160 0 8 0 namei 1024 11553 0 11553 2 1 1 2 0 8 1 percpumem 16 67 0 18 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 kstatmem 264 50 0 26 2 0 2 2 0 8 0 scsiplug 72 6 0 6 1 0 1 1 0 8 1 scxspl 216 17444 0 17444 11 3 8 8 1 8 8 plimitpl 152 201 0 184 1 0 1 1 0 8 0 sigapl 424 972 0 924 7 1 6 7 0 8 0 knotepl 120 317 0 0 10 0 10 10 0 8 0 kqueuepl 224 219 0 210 5 3 2 5 0 8 1 pipepl 344 166 0 139 3 0 3 3 0 8 0 fdescpl 528 954 0 923 3 0 3 3 0 8 0 filepl 160 4993 0 4743 17 5 12 17 0 8 1 lockfpl 104 302 0 299 2 1 1 2 0 8 0 lockfspl 48 137 0 134 1 0 1 1 0 8 0 sessionpl 144 48 0 39 1 0 1 1 0 8 0 pgrppl 48 73 0 55 1 0 1 1 0 8 0 ucredpl 104 536 0 523 1 0 1 1 0 8 0 zombiepl 144 927 0 924 1 0 1 1 0 8 0 processpl 1232 972 0 924 5 0 5 5 0 8 0 procpl 664 1761 0 1706 6 0 6 6 0 8 0 sosppl 176 3 0 3 2 1 1 1 0 8 1 sockpl 752 938 0 911 17 10 7 17 0 8 3 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 124 0 0 16 0 16 16 0 8 0 mcl2k 2048 24 0 0 3 0 3 3 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 269 0 0 17 0 17 17 0 8 0 bufpl 280 6658 0 528 439 0 439 439 0 8 0 anonpl 32 11209 0 0 92 1 91 91 0 246 0 amapchunkpl 152 25091 0 24604 37 3 34 36 0 158 11 amappl16 200 3560 0 3533 38 24 14 26 0 8 8 amappl15 192 7 0 7 2 2 0 1 0 8 0 amappl14 184 527 0 526 1 0 1 1 0 8 0 amappl13 176 146 0 133 1 0 1 1 0 8 0 amappl12 168 1222 0 1193 2 0 2 2 0 8 0 amappl11 160 28 0 28 2 2 0 1 0 8 0 amappl10 152 67 0 53 1 0 1 1 0 8 0 amappl9 144 260 0 259 2 1 1 1 0 8 0 amappl8 136 128 0 125 1 0 1 1 0 8 0 amappl7 128 168 0 155 1 0 1 1 0 8 0 amappl6 120 182 0 181 1 0 1 1 0 8 0 amappl5 112 119 0 108 1 0 1 1 0 8 0 amappl4 104 344 0 325 1 0 1 1 0 8 0 amappl3 96 4759 0 4647 4 0 4 4 0 8 0 amappl2 88 658 0 596 2 0 2 2 0 8 0 amappl1 80 17014 0 16406 18 0 18 18 0 8 1 amappl 88 6630 0 6466 5 0 5 5 0 92 0 uvmvnodes 80 118 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 128 256 0 256 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 17 0 0 1 0 1 1 0 8 0 uaddrrnd 24 954 0 923 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 954 0 923 1 0 1 1 0 8 0 vmmpekpl 168 10111 0 10063 3 0 3 3 0 8 0 vmmpepl 168 75642 0 73723 110 0 110 110 0 357 10 vmsppl 488 953 0 923 5 0 5 5 0 8 0 rwobjpl 80 26119 0 25048 32 0 32 32 0 8 1 pdppl 4096 1915 0 1846 111 40 71 85 0 8 2 pvpl 32 18906 0 0 153 0 153 153 0 265 0 pmappl 256 953 0 923 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 296 0 46 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace memcpy() at memcpy+0x19 readdisklabel(d02,ffffffff811f66f0,ffff8000015fa800,0) at readdisklabel+0x1f6 sys/arch/amd64/amd64/disksubr.c:96 sdgetdisklabel(d01,ffff8000002a2c00,ffff8000015fa800,0) at sdgetdisklabel+0x897 sys/scsi/sd.c:1169 sdioctl(d01,20006473,ffff80002a2ceb50,1,ffff8000ffff2018) at sdioctl+0x6fb sys/scsi/sd.c:883 VOP_IOCTL(fffffd80623e46c8,20006473,ffff80002a2ceb50,1,fffffd80097fd4e0,ffff8000ffff2018) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806c755868,20006473,ffff80002a2ceb50,ffff8000ffff2018) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff8000ffff2018,ffff80002a2ced30,ffff80002a2cec80) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a2ced30) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2ced30) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x122cb5b0580, count: -9 ddb{0}> machine ddbcpu 1