uvm_fault(0xfffffd806c1f8d38, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at _copyinstr+0x58: lodsb (%rsi) TID PID UID PRFLAGS PFLAGS CPU COMMAND * 17131 49487 0 0x2000 0x4000000 0K syz-executor _copyinstr() at _copyinstr+0x58 sys_unveil(ffff80003c438f98,ffff80003c40e560,ffff80003c40e4b0) at sys_unveil+0x152 sys/kern/vfs_syscalls.c:982 syscall(ffff80003c40e560) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c40e560) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc3b8af55940, count: 11 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(0xfffffd806c1f8d38, 0x0, 0, 1) -> e ddb{0}> trace _copyinstr() at _copyinstr+0x58 sys_unveil(ffff80003c438f98,ffff80003c40e560,ffff80003c40e4b0) at sys_unveil+0x152 sys/kern/vfs_syscalls.c:982 syscall(ffff80003c40e560) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c40e560) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc3b8af55940, count: -4 ddb{0}> show registers rdi 0xffff80002a25f800 rsi 0 rbp 0xffff80003c40e360 rbx 0xffff80003c40e560 rdx 0x400 rcx 0xffff80003c409000 rax 0x7f7fffffc000 r8 0x400 r9 0xffff80003c40e300 r10 0x9896b1a9bde205b4 r11 0xffffffff813bccd0 copystr_fault r12 0xffff80002a25f800 r13 0xffff80003c40e428 r14 0x400 r15 0 rip 0xffffffff813bcca8 _copyinstr+0x58 cs 0x8 rflags 0x50206 acpi_pdirpa+0x3c077 rsp 0xffff80003c40e2e8 ss 0x10 _copyinstr+0x58: lodsb (%rsi) ddb{0}> show proc PROC (syz-executor) tid=17131 pid=49487 tcnt=3 stat=onproc flags process=2000 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c438f98 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000397ee2c0,0xffffffff839341b0 process=0xffff80003c411d30 user=0xffff80003c409000, vmspace=0xfffffd806c1f8d38 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 49487 333631 11920 0 4 0x82000 syz-executor 49487 265946 11920 0 4 0x4082000 syz-executor *49487 17131 11920 0 7 0x4002000 syz-executor 95325 93202 87384 0 3 0 vmmaplk syz-executor 95325 122283 87384 0 2 0x4000000 syz-executor 95325 153142 87384 0 3 0x4000080 fsleep syz-executor 23295 93386 38254 0 2 0xc80 syz-executor 23295 424543 38254 0 3 0x4000080 fifow syz-executor 23295 492939 38254 0 3 0x4000080 fifow syz-executor 23295 355731 38254 0 3 0x4000080 fsleep syz-executor 47206 234190 23466 0 2 0xc80 syz-executor 47206 520800 23466 0 3 0x4000080 sbwait syz-executor 11931 380490 35755 0 2 0xc80 syz-executor 11931 420878 35755 0 3 0x4000080 dtread syz-executor 78923 376567 76564 0 3 0x3000 suspend syz-executor 78923 421666 76564 0 2 0x4081000 syz-executor 11978 319320 0 0 3 0x14200 bored sosplice 534 274861 0 0 3 0x14280 nfsidl nfsio 7271 227116 0 0 3 0x14280 nfsidl nfsio 24276 360076 0 0 3 0x14280 nfsidl nfsio 63212 306335 0 0 3 0x14280 nfsidl nfsio 83317 284414 0 0 3 0x14280 nfsidl nfsio 96542 476688 0 0 3 0x14280 nfsidl nfsio 80541 83865 0 0 3 0x14280 nfsidl nfsio 55880 413929 0 0 3 0x14280 nfsidl nfsio 43152 385987 0 0 3 0x14280 nfsidl nfsio 69269 239506 0 0 3 0x14280 nfsidl nfsio 68507 522003 0 0 3 0x14280 nfsidl nfsio 53169 459740 0 0 3 0x14280 nfsidl nfsio 73325 142848 0 0 3 0x14280 nfsidl nfsio 99630 193265 0 0 3 0x14280 nfsidl nfsio 22213 221854 0 0 3 0x14280 nfsidl nfsio 41143 363098 0 0 3 0x14280 nfsidl nfsio 50568 321818 0 0 3 0x14280 nfsidl nfsio 4331 291305 0 0 3 0x14280 nfsidl nfsio 8361 5748 0 0 3 0x14280 nfsidl nfsio 74993 322785 0 0 3 0x14280 nfsidl nfsio 64553 386679 1 0 3 0x100083 ttyin getty 22944 280387 5675 0 2 0xc82 syz-executor 21225 338995 5675 0 2 0xc82 syz-executor 38254 114183 5675 0 2 0xc82 syz-executor 11920 99087 5675 0 2 0xc82 syz-executor 35755 506594 5675 0 2 0xc82 syz-executor 76564 153748 5675 0 2 0xc82 syz-executor 23466 131539 5675 0 2 0xc82 syz-executor 87384 435916 5675 0 2 0xc82 syz-executor 5675 96712 7760 0 3 0x82 kqread syz-executor 7760 500773 58702 0 3 0x10008a sigsusp ksh 58702 449953 86448 0 3 0x98 kqread sshd-session 86448 238420 36430 0 3 0x92 kqread sshd-session 36430 46272 1 0 3 0x88 kqread sshd 85579 362382 70409 74 3 0x1100092 bpf pflogd 70409 319509 1 0 3 0x80 sbwait pflogd 71289 259855 50368 73 3 0x1100090 kqread syslogd 50368 135783 1 0 3 0x100082 sbwait syslogd 81096 97127 1 0 3 0x100080 kqread resolvd 74977 314739 56140 77 3 0x100092 kqread dhcpleased 32025 77490 56140 77 3 0x100092 kqread dhcpleased 56140 433626 1 0 3 0x80 kqread dhcpleased 83670 338829 0 0 3 0x14200 bored smr 78681 37927 0 0 3 0x14200 pgzero zerothread 97478 121003 0 0 3 0x14200 aiodoned aiodoned 29476 143553 0 0 3 0x14200 syncer update 26208 229795 0 0 3 0x14200 cleaner cleaner 93791 346808 0 0 3 0x14200 reaper reaper 97856 254024 0 0 3 0x14200 pgdaemon pagedaemon 16891 450665 0 0 3 0x14200 bored viomb 32654 185455 0 0 3 0x40014200 acpi0 acpi0 18916 424992 0 0 7 0x40014200 idle1 15245 453255 0 0 3 0x14200 bored softnet3 98907 436895 0 0 3 0x14200 bored softnet2 42978 400491 0 0 3 0x14200 bored softnet1 60846 70291 0 0 3 0x14200 bored softnet0 21411 239035 0 0 3 0x14200 bored systqmp 23202 375050 0 0 3 0x14200 bored systq 50261 204242 0 0 3 0x14200 tmoslp softclockmp 68891 302568 0 0 3 0x40014200 tmoslp softclock 41555 47225 0 0 3 0x40014200 idle0 1 422385 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 49487 (syz-executor) thread 0xffff80003c438f98 (17131) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8391fc68) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2da sys/kern/kern_synch.c:366 #3 msleep_nsec+0x141 sys/kern/kern_synch.c:219 #4 single_thread_set+0x1de sys/kern/kern_sig.c:2336 #5 sys_unveil+0x117 sys/kern/vfs_syscalls.c:981 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 Process 95325 (syz-executor) thread 0xffff8000397eed00 (122283) shared rwlock vmmaplk r = 0 (0xfffffd806c1f82f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x36e sys/kern/kern_rwlock.c:397 #2 uvm_vslock_device+0x149 sys/uvm/uvm_glue.c:173 #3 physio+0x277 sys/kern/kern_physio.c:139 #4 spec_read+0x155 sys/kern/spec_vnops.c:215 #5 VOP_READ+0x102 sys/kern/vfs_vops.c:227 #6 vn_read+0x17b sys/kern/vfs_vnops.c:369 #7 dofilereadv+0x230 sys/kern/sys_generic.c:252 #8 sys_pread+0xae sys/kern/vfs_syscalls.c:3303 #9 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #10 Xsyscall+0x128 Process 78923 (syz-executor) thread 0xffff80003c438d08 (421666) exclusive rrwlock inode r = 0 (0xfffffd806882c9a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10226 11162K 11309K 166960K 12041 0 pcb 17 12K 12K 166960K 55 0 rtable 224 7K 8K 166960K 408 0 pf 34 17K 18K 166960K 83 0 ifaddr 39 6K 8K 166960K 67 0 ifgroup 51 2K 2K 166960K 110 0 sysctl 2 1K 9K 166960K 7 0 counters 66 36K 37K 166960K 122 0 ioctlops 0 0K 4K 166960K 1533 0 iov 0 0K 12K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1415 89K 89K 166960K 1936 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 124 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 110K 166960K 452 0 sigio 0 0K 0K 166960K 6 0 proc 72 91K 140K 166960K 598 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 2 0K 0K 166960K 41 0 in_multi 88 6K 7K 166960K 122 0 ether_multi 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 404 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 252 152K 162K 166960K 5853 0 UVM aobj 11 2K 2K 166960K 12 0 pinsyscall 43 86K 108K 166960K 1572 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 42 0 temp 45 8687K 8758K 166960K 13300 0 kqueue 13 20K 30K 166960K 67 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 62 0 55 1 0 1 1 0 8 0 rtentry 176 122 0 21 6 0 6 6 0 8 0 unpcb 144 187 0 164 1 0 1 1 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 808 84 0 80 1 0 1 1 0 8 0 arp 128 19 0 3 1 0 1 1 0 8 0 inpcb 328 329 0 318 4 0 4 4 0 8 2 nd6 144 25 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1192 17 0 17 1 0 1 1 0 8 1 pppxif 1504 6 0 6 1 0 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 31 0 1 1 0 1 1 0 8 0 pfstkey 128 31 0 1 1 0 1 1 0 8 0 pfstate 384 30 0 1 3 0 3 3 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 486 0 75 29 0 29 29 0 8 2 art_table 32 488 0 75 4 0 4 4 0 8 0 art_node 16 120 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semapl 112 120 0 110 1 0 1 1 0 8 0 shmpl 112 9 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2259 0 754 95 0 95 95 0 8 0 ffsino 288 2259 0 754 109 0 109 109 0 8 0 nchpl 144 2878 0 1179 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 uvmvnodes 80 2680 0 0 55 0 55 55 0 8 0 vnodes 216 2680 0 0 149 0 149 149 0 8 0 namei 1024 9614 0 9613 2 1 1 2 0 8 0 percpumem 16 76 0 28 1 0 1 1 0 8 0 kstatmem 264 54 0 30 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 12657 0 12657 10 2 8 8 1 8 8 plimitpl 152 67 0 49 1 0 1 1 0 8 0 sigapl 424 781 0 710 11 2 9 9 0 8 0 knotepl 120 313 0 0 10 0 10 10 0 8 0 kqueuepl 224 105 0 96 2 0 2 2 0 8 1 pipepl 336 126 0 99 3 0 3 3 0 8 0 fdescpl 520 739 0 707 3 0 3 3 0 8 0 filepl 160 3828 0 3586 16 0 16 16 0 8 5 lockfpl 104 77 0 74 1 0 1 1 0 8 0 lockfspl 48 33 0 30 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 39 0 22 1 0 1 1 0 8 0 ucredpl 104 737 0 724 1 0 1 1 0 8 0 zombiepl 144 713 0 710 1 0 1 1 0 8 0 processpl 1240 781 0 710 6 0 6 6 0 8 0 procpl 656 1331 0 1250 9 1 8 8 0 8 1 srpgc 96 2 0 2 1 0 1 1 0 8 1 sockpl 728 585 0 541 7 0 7 7 0 8 2 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 39 0 0 5 0 5 5 0 8 0 mtagpl 96 13 0 0 1 0 1 1 0 8 0 mbufpl 256 362 0 0 23 0 23 23 0 8 0 bufpl 280 4757 0 126 331 0 331 331 0 8 0 anonpl 32 8308 0 0 67 0 67 67 0 246 0 amapchunkpl 152 18062 0 17523 29 1 28 28 0 158 7 amappl16 200 3072 0 2738 25 7 18 18 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 116 0 104 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1402 0 1369 4 1 3 3 0 8 0 amappl11 160 70 0 56 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 267 0 267 1 1 0 1 0 8 0 amappl8 136 50 0 48 1 0 1 1 0 8 0 amappl7 128 128 0 116 1 0 1 1 0 8 0 amappl6 120 192 0 189 1 0 1 1 0 8 0 amappl5 112 199 0 190 1 0 1 1 0 8 0 amappl4 104 330 0 311 1 0 1 1 0 8 0 amappl3 96 3349 0 3225 5 1 4 4 0 8 0 amappl2 88 656 0 595 2 0 2 2 0 8 0 amappl1 80 9768 0 9155 15 0 15 15 0 8 1 amappl 88 5094 0 4914 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 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 11 0 1 1 0 1 1 0 8 0 uaddrrnd 24 739 0 707 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 739 0 707 1 0 1 1 0 8 0 vmmpekpl 168 7636 0 7602 3 0 3 3 0 8 0 vmmpepl 168 53651 0 51301 103 0 103 103 0 357 0 vmsppl 480 738 0 707 5 0 5 5 0 8 1 rwobjpl 72 19834 0 15883 73 1 72 72 0 8 0 pdppl 4096 1485 0 1414 107 36 71 85 0 8 0 pvpl 32 15841 0 0 128 0 128 128 0 265 0 pmappl 256 738 0 707 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 404 0 40 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace _copyinstr() at _copyinstr+0x58 sys_unveil(ffff80003c438f98,ffff80003c40e560,ffff80003c40e4b0) at sys_unveil+0x152 sys/kern/vfs_syscalls.c:982 syscall(ffff80003c40e560) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c40e560) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc3b8af55940, count: -4 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu_x86.c:1218 sched_idle(ffff8000299ddff0) at sched_idle+0x448 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x41e sys/dev/acpi/acpicpu_x86.c:1218 sched_idle(ffff8000299ddff0) at sched_idle+0x448 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5