uvm_fault(0xfffffd806b8287c0, 0x3480, 0, 2) -> e kernel: page fault trap, code=2 Stopped at copyout+0x57: repe movsq (%rsi),%es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 5307 49157 0 0 0x4000000 1K syz-executor *495138 17387 0 0 0x4000000 0 syz-executor copyout() at copyout+0x57 syscall(ffff80003c46b000) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c46b000) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2b38d1522b0, count: 12 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(0xfffffd806b8287c0, 0x3480, 0, 2) -> e ddb{0}> trace copyout() at copyout+0x57 syscall(ffff80003c46b000) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c46b000) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2b38d1522b0, count: -3 ddb{0}> show registers rdi 0x3480 __ALIGN_SIZE+0x2480 rsi 0xffff80003c46ad00 rbp 0xffff80003c46af20 rbx 0x800065c __kernel_phys_end+0x460065c rdx 0xffff80003c466000 rcx 0x4 rax 0x20 r8 0x7f7fffffc000 r9 0 r10 0x269aa6c7b4d6d9e3 r11 0xffffffff82211ea0 copy_fault r12 0x3 r13 0x16 r14 0xffff80003c46ad00 r15 0xffff80003c46b000 rip 0xffffffff82211dc7 copyout+0x57 cs 0x8 rflags 0x50202 acpi_pdirpa+0x3c073 rsp 0xffff80003c46ac70 ss 0x10 copyout+0x57: repe movsq (%rsi),%es:(%rdi) ddb{0}> show proc PROC (syz-executor) tid=495138 pid=17387 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=68, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c440d20,0xffff80003c440568 process=0xffff80003c4c75c8 user=0xffff80003c466000, vmspace=0xfffffd806b8287c0 estcpu=18, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 61392 295641 14706 0 2 0 syz-executor 66317 273901 77939 0 2 0 syz-executor 66317 208996 77939 0 3 0x4000080 fsleep syz-executor 49157 208334 77224 0 3 0x80 fsleep syz-executor 49157 5307 77224 0 7 0x4000000 syz-executor 17387 337016 40132 0 3 0x80 fsleep syz-executor *17387 495138 40132 0 7 0x4000000 syz-executor 17387 522895 40132 0 3 0x4000080 fsleep syz-executor 17387 151688 40132 0 3 0x4000080 fsleep syz-executor 36052 127189 48325 0 2 0 syz-executor 36052 244156 48325 0 3 0x4000080 fsleep syz-executor 92659 28972 56643 0 2 0 syz-executor 92659 282035 56643 0 2 0x4000000 syz-executor 99916 134407 36186 0 3 0x80 nanoslp syz-executor 99916 195338 36186 0 3 0x4000080 ttyin syz-executor 99916 425789 36186 0 3 0x4000080 fsleep syz-executor 29670 83945 0 0 3 0x14280 nfsidl nfsio 33721 457160 0 0 3 0x14280 nfsidl nfsio 25089 41981 0 0 3 0x14280 nfsidl nfsio 11442 89035 0 0 3 0x14280 nfsidl nfsio 45692 74210 0 0 3 0x14280 nfsidl nfsio 1782 184962 0 0 3 0x14280 nfsidl nfsio 48842 151117 0 0 3 0x14280 nfsidl nfsio 11977 114375 0 0 3 0x14280 nfsidl nfsio 1135 94917 0 0 3 0x14280 nfsidl nfsio 66903 343851 0 0 3 0x14280 nfsidl nfsio 30188 296238 0 0 3 0x14280 nfsidl nfsio 6391 197305 0 0 3 0x14280 nfsidl nfsio 63352 256399 0 0 3 0x14280 nfsidl nfsio 11727 36244 0 0 3 0x14280 nfsidl nfsio 69980 214909 0 0 3 0x14280 nfsidl nfsio 87805 344591 0 0 3 0x14280 nfsidl nfsio 2187 331378 0 0 3 0x14280 nfsidl nfsio 6509 493960 0 0 3 0x14280 nfsidl nfsio 12668 68511 0 0 3 0x14280 nfsidl nfsio 83435 419995 0 0 3 0x14280 nfsidl nfsio 77939 3253 40130 0 3 0x82 nanoslp syz-executor 14706 422746 40130 0 3 0x82 nanoslp syz-executor 77224 326020 40130 0 2 0xc82 syz-executor 36186 47135 40130 0 3 0x82 nanoslp syz-executor 48325 414883 40130 0 3 0x82 nanoslp syz-executor 40132 204148 40130 0 2 0xc82 syz-executor 72051 48309 40130 0 3 0x82 nanoslp syz-executor 56643 489475 40130 0 3 0x82 nanoslp syz-executor 40130 10977 31368 0 3 0x82 kqread syz-executor 31368 176817 95990 0 3 0x10008a sigsusp ksh 95990 114189 89311 0 3 0x98 kqread sshd-session 89311 44046 62536 0 3 0x92 kqread sshd-session 84530 191800 1 0 3 0x100083 ttyin getty 62536 518444 1 0 3 0x88 kqread sshd 87528 478826 89285 74 3 0x1100092 bpf pflogd 89285 34833 1 0 3 0x80 sbwait pflogd 85984 255975 62788 73 3 0x1100090 kqread syslogd 62788 415662 1 0 3 0x100082 sbwait syslogd 96949 392564 1 0 3 0x100080 kqread resolvd 47477 297996 1389 77 3 0x100092 kqread dhcpleased 60660 12845 1389 77 3 0x100092 kqread dhcpleased 1389 160011 1 0 3 0x80 kqread dhcpleased 94087 516782 0 0 3 0x14200 bored smr 9844 375827 0 0 2 0x14200 zerothread 25254 229686 0 0 3 0x14200 aiodoned aiodoned 41351 230532 0 0 3 0x14200 syncer update 69680 137962 0 0 3 0x14200 cleaner cleaner 34154 64085 0 0 3 0x14200 reaper reaper 35314 196662 0 0 3 0x14200 pgdaemon pagedaemon 21629 405044 0 0 3 0x14200 bored viomb 99961 194433 0 0 3 0x40014200 acpi0 acpi0 23559 127779 0 0 3 0x40014200 idle1 92703 39910 0 0 3 0x14200 bored softnet7 21175 326068 0 0 3 0x14200 bored softnet6 15008 42406 0 0 3 0x14200 bored softnet5 48352 298524 0 0 3 0x14200 bored softnet4 40936 158573 0 0 3 0x14200 bored softnet3 12206 400213 0 0 3 0x14200 bored softnet2 7500 372157 0 0 3 0x14200 bored softnet1 89807 180373 0 0 3 0x14200 bored softnet0 22070 245012 0 0 3 0x14200 bored systqmp 60393 467616 0 0 3 0x14200 bored systq 40743 34540 0 0 3 0x14200 tmoslp softclockmp 93070 304870 0 0 3 0x40014200 tmoslp softclock 22340 385252 0 0 3 0x40014200 idle0 1 242756 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 49157 (syz-executor) thread 0xffff80003c4c2fc8 (5307) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839c13b0) #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:367 #3 biowait+0xc6 sys/kern/vfs_bio.c:1242 #4 bwrite+0x2e7 sys/kern/vfs_bio.c:754 #5 ffs_write+0x810 sys/ufs/ffs/ffs_vnops.c:377 #6 VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 #7 vn_write+0x1d3 sys/kern/vfs_vnops.c:408 #8 dofilewritev+0x242 sys/kern/sys_generic.c:380 #9 sys_write+0xa2 sys/kern/sys_generic.c:300 #10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ea40930) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10215 11109K 11245K 166960K 11381 0 pcb 17 12K 12K 166960K 24 0 rtable 193 5K 5K 166960K 255 0 pf 34 17K 18K 166960K 45 0 ifaddr 41 7K 7K 166960K 45 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 36K 166960K 68 0 ioctlops 0 0K 4K 166960K 1523 0 iov 0 0K 12K 166960K 5 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1348 85K 85K 166960K 1447 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 188 0 sigio 0 0K 0K 166960K 2 0 proc 73 115K 164K 166960K 532 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 11 0 in_multi 89 6K 7K 166960K 102 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 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 366 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 246 167K 177K 166960K 3398 0 UVM aobj 4 2K 2K 166960K 4 0 pinsyscall 43 86K 102K 166960K 1266 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 12 0K 1K 166960K 28 0 temp 35 8638K 8703K 166960K 4217 0 kqueue 14 22K 26K 166960K 31 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 35 0 32 1 0 1 1 0 8 0 rtentry 176 95 0 7 5 0 5 5 0 8 0 unpcb 144 62 0 45 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 24 0 19 1 0 1 1 0 8 0 arp 128 10 0 0 1 0 1 1 0 8 0 inpcb 328 166 0 156 7 0 7 7 0 8 6 nd6 144 16 0 2 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 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 20 0 0 1 0 1 1 0 8 0 pfstkey 128 20 0 0 1 0 1 1 0 8 0 pfstate 384 20 0 0 2 0 2 2 0 8 0 pfrule 1344 22 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 436 0 39 28 0 28 28 0 8 0 art_table 40 437 0 39 5 0 5 5 0 8 0 art_node 32 95 0 16 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1687 0 171 95 0 95 95 0 8 0 ffsino 296 1687 0 171 117 0 117 117 0 8 0 nchpl 144 1934 0 243 63 0 63 63 0 8 0 uvmvnodes 80 1806 0 0 37 0 37 37 0 8 0 vnodes 216 1806 0 0 101 0 101 101 0 8 0 namei 1024 6403 0 6403 1 0 1 1 0 8 1 percpumem 16 49 0 0 1 0 1 1 0 8 0 kstatmem 264 26 0 0 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6797 0 6796 3 2 1 2 1 8 0 plimitpl 152 35 0 16 1 0 1 1 0 8 0 sigapl 424 510 0 436 9 0 9 9 0 8 0 knotepl 120 351 0 0 11 0 11 11 0 8 0 kqueuepl 224 32 0 21 1 0 1 1 0 8 0 pipepl 344 137 0 110 6 0 6 6 0 8 3 fdescpl 528 468 0 436 3 0 3 3 0 8 0 filepl 160 2091 0 1864 14 0 14 14 0 8 4 lockfpl 104 22 0 20 1 0 1 1 0 8 0 lockfspl 48 12 0 10 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 258 0 244 1 0 1 1 0 8 0 zombiepl 144 437 0 436 1 0 1 1 0 8 0 processpl 1248 510 0 436 6 0 6 6 0 8 0 procpl 664 614 0 531 8 0 8 8 0 8 0 sockpl 752 265 0 235 10 0 10 10 0 8 7 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 106 0 0 14 0 14 14 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 135 0 0 9 0 9 9 0 8 0 bufpl 280 2975 0 122 204 0 204 204 0 8 0 anonpl 32 5512 0 0 45 0 45 45 0 246 0 amapchunkpl 152 9949 0 9435 30 3 27 27 0 158 3 amappl16 200 1994 0 1962 5 3 2 5 0 8 0 amappl15 192 4 0 3 1 0 1 1 0 8 0 amappl14 184 111 0 99 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1127 0 1096 2 0 2 2 0 8 0 amappl11 160 53 0 38 1 0 1 1 0 8 0 amappl10 152 84 0 84 1 1 0 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 46 0 44 1 0 1 1 0 8 0 amappl7 128 105 0 93 1 0 1 1 0 8 0 amappl6 120 179 0 176 1 0 1 1 0 8 0 amappl5 112 139 0 128 1 0 1 1 0 8 0 amappl4 104 287 0 266 1 0 1 1 0 8 0 amappl3 96 1600 0 1483 5 1 4 4 0 8 0 amappl2 88 647 0 585 2 0 2 2 0 8 0 amappl1 80 8428 0 7821 15 0 15 15 0 8 2 amappl 88 2725 0 2552 5 0 5 5 0 92 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 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 3 0 0 1 0 1 1 0 8 0 uaddrrnd 24 468 0 436 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 468 0 436 1 0 1 1 0 8 0 vmmpekpl 168 5554 0 5523 2 0 2 2 0 8 0 vmmpepl 168 36719 0 34693 90 0 90 90 0 357 0 vmsppl 488 467 0 436 5 0 5 5 0 8 1 rwobjpl 80 14800 0 12043 58 1 57 57 0 8 0 pdppl 4096 944 0 872 102 30 72 88 0 8 0 pvpl 32 13615 0 0 110 0 110 110 0 265 0 pmappl 256 467 0 436 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 266 0 32 7 0 7 7 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace copyout() at copyout+0x57 syscall(ffff80003c46b000) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c46b000) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2b38d1522b0, count: -3 ddb{0}> machine ddbcpu 1