uvm_fault(0xfffffd807e9c1738, 0x7f8315416000, 0, 1) -> e kernel: page fault trap, code=9 Stopped at pmap_write_protect+0x410: movq 0(%r15),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND *221122 70736 0 0 0 0 syz-executor pmap_write_protect(fffffd806cfaf290,62a828c1000,62a82cc0000,3) at pmap_write_protect+0x410 sys/arch/amd64/amd64/pmap.c:2208 uvm_map_protect(fffffd807e9c1738,62a828c0000,62a82cc0000,3,0,0,f8cfe4b121bbde51) at uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:476 [inline] uvm_map_protect(fffffd807e9c1738,62a828c0000,62a82cc0000,3,0,0,f8cfe4b121bbde51) at uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202 sys_mprotect(ffff800033cde2c0,ffff8000374e53a0,ffff8000374e52f0) at sys_mprotect+0x341 sys/uvm/uvm_mmap.c:590 syscall(ffff8000374e53a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000374e53a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x741aadd7dfa0, count: 10 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(0xfffffd807e9c1738, 0x7f8315416000, 0, 1) -> e ddb> trace pmap_write_protect(fffffd806cfaf290,62a828c1000,62a82cc0000,3) at pmap_write_protect+0x410 sys/arch/amd64/amd64/pmap.c:2208 uvm_map_protect(fffffd807e9c1738,62a828c0000,62a82cc0000,3,0,0,f8cfe4b121bbde51) at uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:476 [inline] uvm_map_protect(fffffd807e9c1738,62a828c0000,62a82cc0000,3,0,0,f8cfe4b121bbde51) at uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202 sys_mprotect(ffff800033cde2c0,ffff8000374e53a0,ffff8000374e52f0) at sys_mprotect+0x341 sys/uvm/uvm_mmap.c:590 syscall(ffff8000374e53a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000374e53a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x741aadd7dfa0, count: -5 ddb> show registers rdi 0x3fdff03000 rsi 0xffff86aa82c04000 rbp 0xffff8000374e51a0 rbx 0x62a82cc0000 rdx 0xfffffffff rcx 0x7f8000000000 rax 0x62a82cc0 r8 0 r9 0 r10 0 r11 0xe99310f56cc4922d r12 0x7f8315416600 r13 0x62a82e00000 r14 0x3fdff03000 r15 0x7f8315416000 rip 0xffffffff82969b70 pmap_write_protect+0x410 cs 0x8 rflags 0x10287 __ALIGN_SIZE+0xf287 rsp 0xffff8000374e5100 ss 0x10 pmap_write_protect+0x410: movq 0(%r15),%r14 ddb> show proc PROC (syz-executor) tid=221122 pid=70736 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c91a560,0xffff800033cdefc8 process=0xffff80003c904920 user=0xffff8000374e0000, vmspace=0xfffffd807e9c1738 estcpu=36, cpticks=3, pctcpu=0.0, user=2, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 30507 91641 46935 0 2 0 syz-executor 98085 217712 43776 0 2 0 syz-executor 98085 424571 43776 0 3 0x4000080 kqsel syz-executor 68356 403885 64805 0 2 0 syz-executor 68356 6947 64805 0 3 0x4000080 netcon syz-executor *70736 221122 48541 0 7 0 syz-executor 70736 315314 48541 0 3 0x4000080 fsleep syz-executor 46935 374975 38228 0 3 0x82 nanoslp syz-executor 43776 369916 38228 0 3 0x82 nanoslp syz-executor 67721 215585 38228 0 3 0x82 nanoslp syz-executor 9048 112784 38228 0 3 0x82 nanoslp syz-executor 94276 175633 0 0 3 0x14280 nfsidl nfsio 51945 73884 0 0 3 0x14280 nfsidl nfsio 74667 246251 0 0 3 0x14280 nfsidl nfsio 20085 167249 0 0 3 0x14280 nfsidl nfsio 6351 72116 0 0 3 0x14280 nfsidl nfsio 84429 235576 0 0 3 0x14280 nfsidl nfsio 61779 275504 0 0 3 0x14280 nfsidl nfsio 94625 376845 0 0 3 0x14280 nfsidl nfsio 67472 70454 0 0 3 0x14280 nfsidl nfsio 80865 493238 0 0 3 0x14280 nfsidl nfsio 24789 85529 0 0 3 0x14280 nfsidl nfsio 17543 402509 0 0 3 0x14280 nfsidl nfsio 59190 268281 0 0 3 0x14280 nfsidl nfsio 89405 17324 0 0 3 0x14280 nfsidl nfsio 39748 212641 0 0 3 0x14280 nfsidl nfsio 7238 113848 0 0 3 0x14280 nfsidl nfsio 3220 425667 0 0 3 0x14280 nfsidl nfsio 91475 111956 0 0 3 0x14280 nfsidl nfsio 98213 100396 0 0 3 0x14280 nfsidl nfsio 30811 82935 0 0 3 0x14280 nfsidl nfsio 64805 269704 38228 0 3 0x82 nanoslp syz-executor 50363 502406 38228 0 3 0x2 biowait syz-executor 48541 201598 38228 0 3 0x82 nanoslp syz-executor 72381 500623 38228 0 3 0x82 wait syz-executor 38228 124117 44774 0 3 0x82 kqread syz-executor 44774 456087 51828 0 3 0x10008a sigsusp ksh 51828 22529 8947 0 3 0x98 kqread sshd-session 8947 234020 64062 0 3 0x92 kqread sshd-session 92283 202682 1 0 3 0x100083 ttyin getty 64062 137079 1 0 3 0x88 kqread sshd 98788 481428 49484 73 3 0x1100090 kqread syslogd 49484 151295 1 0 3 0x100082 sbwait syslogd 48021 55439 1 0 3 0x100080 kqread resolvd 36900 485992 84958 77 3 0x100092 kqread dhcpleased 8094 96727 84958 77 3 0x100092 kqread dhcpleased 84958 274863 1 0 3 0x80 kqread dhcpleased 84919 271098 0 0 3 0x14200 bored smr 62657 230160 0 0 2 0x14200 zerothread 40452 521826 0 0 3 0x14200 aiodoned aiodoned 29127 181640 0 0 3 0x14200 syncer update 15974 189837 0 0 3 0x14200 cleaner cleaner 96954 250425 0 0 3 0x14200 reaper reaper 69532 2517 0 0 3 0x14200 pgdaemon pagedaemon 51662 274613 0 0 3 0x14200 bored viomb 65668 247692 0 0 3 0x40014200 acpi0 acpi0 41479 466319 0 0 3 0x14200 bored softnet0 24216 482179 0 0 3 0x14200 bored systqmp 9425 58044 0 0 3 0x14200 bored systq 78929 254948 0 0 3 0x40014200 tmoslp softclock 17840 235512 0 0 3 0x40014200 idle0 1 162588 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11068 12113K 13233K 166960K 14281 0 pcb 17 16K 22K 166960K 535 0 rtable 241 11K 12K 166960K 761 0 pf 30 12K 14K 166960K 147 0 ifaddr 39 7K 8K 166960K 126 0 ifgroup 48 2K 2K 166960K 205 0 sysctl 4 1K 9K 166960K 44 0 counters 33 17K 18K 166960K 146 0 ioctlops 0 0K 4K 166960K 531 0 iov 0 0K 32K 166960K 180 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1388 87K 88K 166960K 2520 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 164 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 102K 166960K 1431 0 sigio 0 0K 0K 166960K 24 0 proc 60 59K 83K 166960K 709 0 subproc 72 4K 4K 166960K 110 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 267 0 in_multi 88 6K 7K 166960K 201 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 28 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 627 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 211 142K 164K 166960K 14742 0 UVM aobj 45 16K 16K 166960K 47 0 pinsyscall 38 76K 92K 166960K 2639 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 71 0 NDP 11 0K 2K 166960K 88 0 temp 113 9076K 9142K 166960K 55915 0 kqueue 13 20K 32K 166960K 263 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 120 344 0 341 3 0 3 3 0 8 2 rtentry 136 221 0 126 4 0 4 4 0 8 0 unpcb 144 1288 0 1271 6 0 6 6 0 8 5 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpqe 32 6 0 6 1 0 1 1 0 8 1 tcpcb 736 503 0 496 7 0 7 7 0 8 6 arp 96 30 0 14 1 0 1 1 0 8 0 ipq 40 6 0 3 1 0 1 1 0 8 0 ipqe 40 10 0 7 1 0 1 1 0 8 0 inpcb 328 1595 0 1584 7 0 7 7 0 8 5 ip6q 72 4 0 0 1 0 1 1 0 8 0 ip6af 40 4 0 0 1 0 1 1 0 8 0 nd6 112 40 0 17 1 0 1 1 0 8 0 pkpcb 40 77 0 77 1 0 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1072 94 0 93 1 0 1 1 0 8 0 pppxif 1384 7 0 7 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 766 0 382 31 0 31 31 0 8 3 art_table 40 769 0 382 5 0 5 5 0 8 0 art_node 32 219 0 136 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 8 1 0 1 1 0 8 1 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 127 0 117 1 0 1 1 0 8 0 shmpl 112 39 0 1 2 0 2 2 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 4215 0 2759 92 0 92 92 0 8 0 ffsino 256 4215 0 2759 92 0 92 92 0 8 0 nchpl 144 6164 0 4462 64 0 64 64 0 8 0 rtmask 32 10 0 10 1 0 1 1 0 8 1 vnodes 216 4738 0 0 264 0 264 264 0 8 0 namei 1024 24201 0 24201 1 0 1 1 0 8 1 vcpupl 3904 5 0 1 1 0 1 1 0 8 0 vmpool 808 5 0 1 1 0 1 1 0 8 0 kstatmem 264 128 0 106 3 0 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 11 0 11 1 0 1 1 0 8 1 scxspl 216 21609 0 21608 8 0 8 8 1 8 7 plimitpl 152 407 0 390 1 0 1 1 0 8 0 sigapl 424 1734 0 1672 8 0 8 8 0 8 0 knotepl 120 76853 0 76806 31 21 10 18 0 8 8 kqueuepl 184 686 0 673 4 0 4 4 0 8 3 pipepl 304 222 0 195 3 0 3 3 0 8 0 fdescpl 448 1699 0 1670 4 0 4 4 0 8 0 filepl 120 13441 0 13216 14 0 14 14 0 8 4 lockfpl 104 498 0 495 1 0 1 1 0 8 0 lockfspl 48 172 0 169 1 0 1 1 0 8 0 sessionpl 144 28 0 20 1 0 1 1 0 8 0 pgrppl 48 55 0 39 1 0 1 1 0 8 0 ucredpl 104 2565 0 2552 1 0 1 1 0 8 0 zombiepl 144 1675 0 1672 1 0 1 1 0 8 0 processpl 1152 1734 0 1672 5 0 5 5 0 8 0 procpl 664 3641 0 3576 7 0 7 7 0 8 0 sosppl 176 11 0 11 1 0 1 1 0 8 1 sockpl 552 3496 0 3465 16 5 11 13 0 8 8 mcl64k 65536 61 0 59 1 0 1 1 0 8 0 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 20 0 20 1 0 1 1 0 8 1 mcl4k 4096 4152 0 4100 14 0 14 14 0 8 6 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 1772 0 1769 2 0 2 2 0 8 1 mtagpl 96 10 0 10 1 0 1 1 0 8 1 mbufpl 256 18731 0 18570 19 0 19 19 0 8 4 bufpl 280 6568 0 354 444 0 444 444 0 8 0 anonpl 24 246738 0 243636 58 0 58 58 0 187 25 amapchunkpl 152 50962 0 50533 36 0 36 36 0 158 14 amappl16 200 4198 0 4164 22 10 12 15 0 8 8 amappl15 192 5 0 5 1 0 1 1 0 8 1 amappl14 184 459 0 458 1 0 1 1 0 8 0 amappl13 176 132 0 122 1 0 1 1 0 8 0 amappl12 168 1957 0 1929 2 0 2 2 0 8 0 amappl11 160 2 0 2 1 0 1 1 0 8 1 amappl10 152 152 0 142 1 0 1 1 0 8 0 amappl9 144 257 0 257 1 0 1 1 0 8 1 amappl8 136 120 0 118 1 0 1 1 0 8 0 amappl7 128 156 0 145 1 0 1 1 0 8 0 amappl6 120 190 0 189 1 0 1 1 0 8 0 amappl5 112 101 0 93 1 0 1 1 0 8 0 amappl4 104 283 0 269 1 0 1 1 0 8 0 amappl3 96 9797 0 9697 4 0 4 4 0 8 0 amappl2 88 581 0 526 2 0 2 2 0 8 0 amappl1 80 15877 0 15329 15 0 15 15 0 8 0 amappl 88 13743 0 13595 5 0 5 5 0 92 0 uvmvnodes 80 146 0 0 3 0 3 3 0 8 0 dma4096 4096 2 0 2 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 255 0 255 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 46 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1699 0 1670 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1699 0 1670 1 0 1 1 0 8 0 vmmpekpl 168 14277 0 14229 3 0 3 3 0 8 0 vmmpepl 168 112327 0 110560 93 0 93 93 0 357 11 vmsppl 368 1698 0 1670 4 0 4 4 0 8 1 rwobjpl 40 30311 0 29290 13 0 13 13 0 8 0 pdppl 4096 3414 0 3346 130 60 70 76 0 8 2 pvpl 32 740078 0 730948 140 0 140 140 0 265 48 pmappl 216 1703 0 1671 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 411 0 60 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace pmap_write_protect(fffffd806cfaf290,62a828c1000,62a82cc0000,3) at pmap_write_protect+0x410 sys/arch/amd64/amd64/pmap.c:2208 uvm_map_protect(fffffd807e9c1738,62a828c0000,62a82cc0000,3,0,0,f8cfe4b121bbde51) at uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:476 [inline] uvm_map_protect(fffffd807e9c1738,62a828c0000,62a82cc0000,3,0,0,f8cfe4b121bbde51) at uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202 sys_mprotect(ffff800033cde2c0,ffff8000374e53a0,ffff8000374e52f0) at sys_mprotect+0x341 sys/uvm/uvm_mmap.c:590 syscall(ffff8000374e53a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000374e53a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x741aadd7dfa0, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace pmap_write_protect(fffffd806cfaf290,62a828c1000,62a82cc0000,3) at pmap_write_protect+0x410 sys/arch/amd64/amd64/pmap.c:2208 uvm_map_protect(fffffd807e9c1738,62a828c0000,62a82cc0000,3,0,0,f8cfe4b121bbde51) at uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:476 [inline] uvm_map_protect(fffffd807e9c1738,62a828c0000,62a82cc0000,3,0,0,f8cfe4b121bbde51) at uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202 sys_mprotect(ffff800033cde2c0,ffff8000374e53a0,ffff8000374e52f0) at sys_mprotect+0x341 sys/uvm/uvm_mmap.c:590 syscall(ffff8000374e53a0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff8000374e53a0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x741aadd7dfa0, count: -5