uvm_fault(0xffffffff839d7e30, 0xffff800029382ec0, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x52: repe stosq %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 241800 64565 0 0 0 0 syz-executor memset() at memset+0x52 ffs_write(ffff80003c412570) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806b71ceb8,ffff80003c412608,23,fffffd80097fb138) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806b71ceb8,ffff80003c412740,40,0,1,294fa56c53318772,0,1008,40) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80003c41b4e8) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80003c41b4e8,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80003c41b4e8,ffff80003c412980,ffff80003c4128d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c412980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c412980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cb715d989f0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffffff839d7e30, 0xffff800029382ec0, 0, 2) -> d ddb{1}> trace memset() at memset+0x52 ffs_write(ffff80003c412570) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806b71ceb8,ffff80003c412608,23,fffffd80097fb138) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806b71ceb8,ffff80003c412740,40,0,1,294fa56c53318772,0,1008,40) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80003c41b4e8) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80003c41b4e8,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80003c41b4e8,ffff80003c412980,ffff80003c4128d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c412980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c412980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cb715d989f0, count: -9 ddb{1}> show registers rdi 0xffff800029382ec0 rsi 0 rbp 0xffff80003c412490 rbx 0x100ec0 acpi_pdirpa+0xecd31 rdx 0 rcx 0x628 rax 0 r8 0x3140 __ALIGN_SIZE+0x2140 r9 0xffff80003c4123f0 r10 0x90605d120e5ed037 r11 0xffff800029382ec0 r12 0xec0 r13 0x4000 __ALIGN_SIZE+0x3000 r14 0xfffffd806b71ceb8 r15 0x1 rip 0xffffffff82ceeed2 memset+0x52 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80003c412288 ss 0x10 memset+0x52: repe stosq %es:(%rdi) ddb{1}> show proc PROC (syz-executor) tid=210916 pid=25953 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=16, usrpri=86, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c41b4e8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c41bcb0,0xffff80003c41b790 process=0xffff8000fffeeb68 user=0xffff80003c40d000, vmspace=0xfffffd806b9a0210 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94197 367112 84182 0 2 0 syz-executor 15117 308662 90764 0 2 0 syz-executor 64565 241800 39317 0 7 0 syz-executor 64565 361487 39317 0 2 0x4000000 syz-executor 76626 110676 7508 0 2 0 syz-executor 76626 250059 7508 0 3 0x4000080 fsleep syz-executor 31648 172124 81493 60929 2 0x10 syz-executor 31648 505960 81493 60929 3 0x4000090 fsleep syz-executor 23444 234702 86160 0 3 0x80 nanoslp syz-executor 23444 355739 86160 0 3 0x4000080 fsleep syz-executor 23444 509128 86160 0 3 0x4000000 smrbar syz-executor 23444 399954 86160 0 3 0x4000000 clonelk syz-executor 36692 330942 0 0 3 0x14200 acct acct 63357 431578 0 0 3 0x14200 bored sosplice 81493 507238 88109 0 3 0x82 nanoslp syz-executor 67323 349242 88109 0 3 0x82 nanoslp syz-executor 7508 485536 88109 0 3 0x82 nanoslp syz-executor 2932 322757 88109 0 3 0x82 wait syz-executor 86160 305411 88109 0 3 0x82 nanoslp syz-executor 90764 43152 88109 0 3 0x82 nanoslp syz-executor 84182 395501 88109 0 3 0x82 nanoslp syz-executor 39317 104276 88109 0 3 0x82 nanoslp syz-executor 88109 323293 43006 0 3 0x82 kqread syz-executor 43006 336405 62377 0 3 0x10008a sigsusp ksh 62377 39135 22249 0 3 0x98 kqread sshd-session 22249 402598 12756 0 3 0x92 kqread sshd-session 92735 35170 1 0 3 0x100083 ttyopn getty 12756 382782 1 0 3 0x88 kqread sshd 71846 87034 99511 74 3 0x1100092 bpf pflogd 99511 7288 1 0 3 0x80 sbwait pflogd 2295 236896 24175 73 3 0x1100090 kqread syslogd 24175 63296 1 0 3 0x100082 sbwait syslogd 21522 469984 1 0 3 0x100080 kqread resolvd 50055 462710 77807 77 3 0x100092 kqread dhcpleased 834 406701 77807 77 3 0x100092 kqread dhcpleased 77807 274903 1 0 3 0x80 kqread dhcpleased 65113 268738 0 0 3 0x14200 pause smr 2855 111558 0 0 2 0x14200 zerothread 96210 431602 0 0 3 0x14200 aiodoned aiodoned 99602 143953 0 0 3 0x14200 syncer update 97953 155130 0 0 3 0x14200 cleaner cleaner 92205 295427 0 0 3 0x14200 reaper reaper 45359 410225 0 0 3 0x14200 pgdaemon pagedaemon 78529 10870 0 0 3 0x14200 bored viomb 60014 321151 0 0 3 0x40014200 acpi0 acpi0 3626 510990 0 0 3 0x40014200 idle1 14948 260373 0 0 3 0x14200 bored softnet1 44849 504417 0 0 3 0x14200 bored softnet0 7758 155054 0 0 3 0x14200 bored systqmp 30110 434439 0 0 3 0x14200 bored systq 99064 289216 0 0 3 0x14200 tmoslp softclockmp 55645 41687 0 0 3 0x40014200 tmoslp softclock 98358 363725 0 0 3 0x40014200 idle0 1 223496 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 23444 (syz-executor) thread 0xffff80003c41bcb0 (509128) exclusive rwlock clonelk r = 0 (0xffffffff8379a838) #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+0x67 sys/net/if.c:-1 #3 tun_dev_close+0x1d9 sys/net/if_tun.c:523 #4 spec_close+0x417 sys/kern/spec_vnops.c:-1 #5 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #6 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #6 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #7 fdrop+0x121 sys/kern/kern_descrip.c:1280 #8 closef+0x192 sys/kern/kern_descrip.c:1264 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10227 11048K 12434K 166960K 12433 0 pcb 17 14K 15K 166960K 90 0 rtable 196 10K 10K 166960K 399 0 pf 42 19K 19K 166960K 125 0 ifaddr 39 6K 8K 166960K 83 0 ifgroup 64 2K 2K 166960K 140 0 sysctl 3 1K 9K 166960K 10 0 counters 72 37K 38K 166960K 182 0 ioctlops 0 0K 4K 166960K 1579 0 iov 0 0K 16K 166960K 135 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1406 88K 89K 166960K 1880 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 30 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 603 0 sigio 1 0K 0K 166960K 12 0 proc 72 115K 164K 166960K 595 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 0 0K 0K 166960K 86 0 in_multi 78 5K 8K 166960K 137 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 145 652K 652K 166960K 145 0 exec 0 0K 1K 166960K 418 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 227 159K 169K 166960K 7226 0 UVM aobj 9 2K 2K 166960K 10 0 pinsyscall 43 86K 104K 166960K 1701 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 43 0 NDP 14 0K 1K 166960K 62 0 temp 49 8645K 8710K 166960K 24290 0 kqueue 14 22K 30K 166960K 118 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 59 0 56 1 0 1 1 0 8 0 rtentry 176 106 0 33 5 0 5 5 0 8 0 unpcb 144 382 0 364 6 5 1 4 0 8 0 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 460 0 454 13 12 1 7 0 8 0 arp 136 12 0 4 1 0 1 1 0 8 0 inpcb 328 1009 0 1000 12 10 2 7 0 8 0 nd6 152 19 0 2 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 51 0 51 2 1 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 25 0 17 1 0 1 1 0 482 0 pffrnode 88 25 0 17 1 0 1 1 0 8 0 pffrent 40 79 0 71 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 pfstitem 24 55 0 1 1 0 1 1 0 8 0 pfstkey 128 58 0 4 2 0 2 2 0 8 0 pfstate 384 55 0 3 6 0 6 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 447 0 115 28 4 24 28 0 8 0 art_table 40 450 0 115 5 0 5 5 0 8 0 art_node 32 106 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 5 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 24 0 14 1 0 1 1 0 8 0 shmpl 112 7 0 1 1 0 1 1 0 8 0 dirhash 1024 30 0 13 3 0 3 3 0 8 0 dino2pl 256 2563 0 1055 95 0 95 95 0 8 0 ffsino 296 2563 0 1055 117 0 117 117 0 8 0 nchpl 144 3377 0 1685 64 0 64 64 0 8 0 rtmask 32 16 0 16 2 2 0 1 0 8 0 vnodes 216 2945 0 0 164 0 164 164 0 8 0 namei 1024 11585 0 11585 2 1 1 2 0 8 1 percpumem 16 106 0 55 1 0 1 1 0 8 0 kstatmem 264 96 0 64 4 1 3 3 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 16230 0 16230 3 2 1 2 1 8 1 plimitpl 152 295 0 278 1 0 1 1 0 8 0 sigapl 424 905 0 855 7 1 6 7 0 8 0 knotepl 120 502 0 0 16 0 16 16 0 8 0 kqueuepl 224 215 0 204 4 3 1 3 0 8 0 pipepl 344 189 0 162 6 3 3 6 0 8 0 fdescpl 528 887 0 856 3 0 3 3 0 8 0 filepl 160 5738 0 5523 22 11 11 17 0 8 0 lockfpl 104 180 0 178 1 0 1 1 0 8 0 lockfspl 48 75 0 73 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 42 0 25 1 0 1 1 0 8 0 ucredpl 104 691 0 677 1 0 1 1 0 8 0 zombiepl 144 857 0 855 1 0 1 1 0 8 0 processpl 1232 905 0 855 5 1 4 5 0 8 0 procpl 664 1737 0 1681 6 0 6 6 0 8 0 sosppl 168 1 0 1 1 1 0 1 0 8 0 sockpl 752 1468 0 1438 23 19 4 17 0 8 0 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 37 0 0 5 0 5 5 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 257 0 0 16 0 16 16 0 8 0 bufpl 280 6491 0 348 439 0 439 439 0 8 0 anonpl 32 8256 0 0 67 0 67 67 0 246 0 amapchunkpl 152 23386 0 22929 34 13 21 28 0 158 1 amappl16 200 3027 0 2997 20 15 5 16 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 120 0 107 1 0 1 1 0 8 0 amappl13 176 11 0 11 1 1 0 1 0 8 0 amappl12 168 1532 0 1502 4 1 3 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 144 250 0 250 1 1 0 1 0 8 0 amappl8 136 30 0 27 1 0 1 1 0 8 0 amappl7 128 109 0 96 1 0 1 1 0 8 0 amappl6 120 177 0 174 1 0 1 1 0 8 0 amappl5 112 123 0 112 1 0 1 1 0 8 0 amappl4 104 310 0 290 1 0 1 1 0 8 0 amappl3 96 3918 0 3828 3 0 3 3 0 8 0 amappl2 88 1136 0 1059 2 0 2 2 0 8 0 amappl1 80 10966 0 10357 16 2 14 15 0 8 0 amappl 88 6460 0 6306 5 0 5 5 0 92 0 uvmvnodes 80 2945 0 0 61 0 61 61 0 8 0 dma32768 32768 1 0 1 1 1 0 1 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 128 254 0 254 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 18 0 17 1 0 1 1 0 8 0 aobjpl 72 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 887 0 855 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 887 0 855 1 0 1 1 0 8 0 vmmpekpl 168 9131 0 9098 3 0 3 3 0 8 0 vmmpepl 168 62383 0 60374 101 6 95 101 0 357 0 vmsppl 488 886 0 855 6 1 5 5 0 8 0 rwobjpl 80 22056 0 18179 80 0 80 80 0 8 0 pdppl 4096 1782 0 1710 104 32 72 86 0 8 0 pvpl 32 16858 0 0 139 3 136 136 0 265 0 pmappl 256 886 0 855 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 299 0 55 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83813ff0) 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(ffffffff839b2ec8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b2ec8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7c0183cd7110, count: 8 ddb{0}> trace x86_ipi_db(ffffffff83813ff0) 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(ffffffff839b2ec8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b2ec8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7c0183cd7110, count: -7 ddb{0}> machine ddbcpu 1 Stopped at memset+0x52: repe stosq %es:(%rdi) memset() at memset+0x52 ffs_write(ffff80003c412570) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806b71ceb8,ffff80003c412608,23,fffffd80097fb138) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806b71ceb8,ffff80003c412740,40,0,1,294fa56c53318772,0,1008,40) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80003c41b4e8) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80003c41b4e8,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80003c41b4e8,ffff80003c412980,ffff80003c4128d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c412980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c412980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cb715d989f0, count: 6 ddb{1}> trace memset() at memset+0x52 ffs_write(ffff80003c412570) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806b71ceb8,ffff80003c412608,23,fffffd80097fb138) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806b71ceb8,ffff80003c412740,40,0,1,294fa56c53318772,0,1008,40) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80003c41b4e8) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80003c41b4e8,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80003c41b4e8,ffff80003c412980,ffff80003c4128d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c412980) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c412980) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7cb715d989f0, count: -9