panic: Caught invalid memory access at ffff800001e853b0 size 104 op 1 Stopped at db_enter+0x17: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND *451400 66696 0 0 0x4000000 0K syz-executor db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff84632b4f) at panic+0x270 sys/kern/subr_prf.c:198 kasan_memcpy(ffff800001e853b0,ffff800001eb45c8,68) at kasan_memcpy+0x1ec sysctl_sysvipc(ffff8000299b7d68,1,200000000040,ffff8000299b7d40) at sysctl_sysvipc+0x746 sys/kern/kern_sysctl.c:2781 kern_sysctl_dirs(33,ffff8000299b7d68,1,200000000040,ffff8000299b7d40,0,1,1ffff00005336f24) at kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429 kern_sysctl(ffff8000299b7d64,2,200000000040,ffff8000299b7d40,0,0,ffff8000299b7fc0) at kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529 sys_sysctl(ffff800029895c90,ffff8000299b7fc0,ffff8000299b7f20) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309 syscall(ffff8000299b7fc0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000299b7fc0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ec7afd7d60, 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: Caught invalid memory access at ffff800001e853b0 size 104 op 1 ddb{0}> show kasan KASAN: invalid write of 104 bytes at 0xffff800001e853b0 from pc 0xffffffff83a4abd6 KASAN: first bad byte at 0xffff800001e85414 (+100); shadow 0x04: partial granule (out-of-bounds) KASAN: 0xffff800001e85414 is 13332 bytes inside the 16384-byte malloc slot [0xffff800001e82000..0xffff800001e86000) KASAN: allocated at: #0 malloc+0xda0 sys/kern/kern_malloc.c:446 #1 sysctl_sysvipc+0x619 sys/kern/kern_sysctl.c:2766 #2 kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429 #3 kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529 #4 sys_sysctl+0x54f sys/kern/kern_sysctl.c:309 #5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 KASAN: pc: sysctl_sysvipc+0x746 KASAN: call trace: #0 kasan_memcpy+0x1ca kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline] #0 kasan_memcpy+0x1ca sys/kern/subr_kasan.c:1025 #1 sysctl_sysvipc+0x746 sys/kern/kern_sysctl.c:2781 #2 kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429 #3 kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529 #4 sys_sysctl+0x54f sys/kern/kern_sysctl.c:309 #5 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 KASAN: shadow of 0xffff800001e85300..0xffff800001e85580 (1 cell = 8 bytes): 0xffff800001e85300: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 0xffff800001e85380: 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 08 >0xffff800001e85400: 08 08[04]fb fe fe fe fe fe fe fe fe fe fe fe fe 0xffff800001e85480: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe 0xffff800001e85500: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe KASAN: legend: 00 valid; 01..07 partial; fb malloc redzone; fc malloc freed; fd pool freed; fe kmem; fa global; f1..f4/f8 stack/scope ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff84632b4f) at panic+0x270 sys/kern/subr_prf.c:198 kasan_memcpy(ffff800001e853b0,ffff800001eb45c8,68) at kasan_memcpy+0x1ec sysctl_sysvipc(ffff8000299b7d68,1,200000000040,ffff8000299b7d40) at sysctl_sysvipc+0x746 sys/kern/kern_sysctl.c:2781 kern_sysctl_dirs(33,ffff8000299b7d68,1,200000000040,ffff8000299b7d40,0,1,1ffff00005336f24) at kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429 kern_sysctl(ffff8000299b7d64,2,200000000040,ffff8000299b7d40,0,0,ffff8000299b7fc0) at kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529 sys_sysctl(ffff800029895c90,ffff8000299b7fc0,ffff8000299b7f20) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309 syscall(ffff8000299b7fc0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000299b7fc0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ec7afd7d60, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000299b74b0 rbx 0xffff8000299b7520 rdx 0 rcx 0xffffffff8521aff0 cpu_info_full_primary+0x1ff0 rax 0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xffff8000299b7298 r11 0xffffffff8416f5d0 x86_bus_space_io_read_1 r12 0xffffffff84632b4f .str.28+0x9b28f r13 0xffffffff8521bc08 cpu_info_full_primary+0x2c08 r14 0xffffffff8521be07 cpu_info_full_primary+0x2e07 r15 0x1 rip 0xffffffff82a38477 db_enter+0x17 cs 0x8 rflags 0x246 rsp 0xffff8000299b74b0 ss 0x10 db_enter+0x17: popq %rbp ddb{0}> show proc PROC (syz-executor) tid=451400 pid=66696 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000298959f8,0xffff800029912550 process=0xffff80003bc75d08 user=0xffff8000299ad000, vmspace=0xffff800001e8cd80 estcpu=36, cpticks=14, pctcpu=0.0, user=0, sys=14, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 70418 274251 42265 0 2 0 syz-executor 70418 337916 42265 0 3 0x4000080 kqread syz-executor 66696 122484 27485 0 2 0 syz-executor *66696 451400 27485 0 7 0x4000000 syz-executor 61134 374413 57191 0 2 0 syz-executor 61134 188377 57191 0 3 0x4000080 bell syz-executor 61134 181800 57191 0 3 0x4000080 netacc syz-executor 61134 511927 57191 0 3 0x4000080 fsleep syz-executor 73890 355367 53993 0 2 0 syz-executor 73890 393088 53993 0 3 0x4000080 kqread syz-executor 66316 346978 1 0 3 0x80 nanoslp init 57191 148638 21873 0 2 0xc82 syz-executor 23174 93856 0 0 3 0x14280 nfsidl nfsio 73129 375132 0 0 3 0x14280 nfsidl nfsio 8909 382259 0 0 3 0x14280 nfsidl nfsio 50004 517930 0 0 3 0x14280 nfsidl nfsio 44606 391459 0 0 3 0x14280 nfsidl nfsio 10126 349215 0 0 3 0x14280 nfsidl nfsio 76566 187990 0 0 3 0x14280 nfsidl nfsio 18550 460884 0 0 3 0x14280 nfsidl nfsio 31554 396268 0 0 3 0x14280 nfsidl nfsio 17911 442031 0 0 3 0x14280 nfsidl nfsio 11006 96361 0 0 3 0x14280 nfsidl nfsio 85319 214774 0 0 3 0x14280 nfsidl nfsio 13346 413991 0 0 3 0x14280 nfsidl nfsio 50073 106672 0 0 3 0x14280 nfsidl nfsio 21892 279946 0 0 3 0x14280 nfsidl nfsio 86272 402720 0 0 3 0x14280 nfsidl nfsio 54364 372110 0 0 3 0x14280 nfsidl nfsio 26862 103808 0 0 3 0x14280 nfsidl nfsio 87916 83976 0 0 3 0x14280 nfsidl nfsio 85065 315004 0 0 3 0x14280 nfsidl nfsio 53993 470003 21873 0 2 0xc82 syz-executor 42265 467707 21873 0 2 0xc82 syz-executor 4459 49385 21873 0 2 0xc82 syz-executor 27485 156896 21873 0 2 0xc82 syz-executor 56026 33364 21873 0 2 0xc82 syz-executor 95042 114929 21873 0 2 0x2 syz-executor 43775 77871 21873 0 3 0x82 wait syz-executor 21873 114008 1 0 3 0x82 kqread syz-executor 14854 455270 0 0 2 0x14200 smr 1099 63409 0 0 2 0x14200 zerothread 84604 516134 0 0 3 0x14200 aiodoned aiodoned 24498 409716 0 0 3 0x14200 syncer update 2451 506477 0 0 3 0x14200 cleaner cleaner 22438 43165 0 0 3 0x14200 reaper reaper 79739 262924 0 0 3 0x14200 pgdaemon pagedaemon 42358 480558 0 0 3 0x14200 bored viomb 70761 311782 0 0 3 0x40014200 acpi0 acpi0 91500 109832 0 0 7 0x40014200 idle1 14224 318150 0 0 3 0x14200 bored softnet1 31713 426487 0 0 3 0x14200 bored softnet0 15666 354045 0 0 3 0x14200 bored systqmp 83213 183739 0 0 3 0x14200 bored systq 42131 189000 0 0 2 0x14200 softclockmp 11770 190809 0 0 3 0x40014200 tmoslp softclock 87970 215898 0 0 3 0x40014200 idle0 1 299117 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11068 12328K 12538K 166960K 13215 0 pcb 17 32K 37K 166960K 174 0 rtable 229 12K 13K 166960K 401 0 pf 37 23K 32795K 166960K 92 0 ifaddr 40 11K 13K 166960K 62 0 ifgroup 56 2K 2K 166960K 101 0 sysctl 4 1K 13K 166960K 11 0 counters 70 42K 43K 166960K 94 0 ioctlops 0 0K 4K 166960K 1620 0 iov 0 0K 28K 166960K 36 0 mount 1 1K 1K 166960K 1 0 log 2 0K 0K 166960K 6 0 vnodes 1397 90K 90K 166960K 2297 0 UFS quota 1 36K 36K 166960K 1 0 UFS mount 5 44K 44K 166960K 5 0 shm 2 2K 10K 166960K 54 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 115 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 292K 166960K 11964 0 file desc 15 57K 89K 166960K 926 0 sigio 0 0K 0K 166960K 19 0 proc 14 46K 177K 166960K 689 0 subproc 72 9K 9K 166960K 84 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 20K 20K 166960K 1 0 ip_moptions 0 0K 0K 166960K 16 0 in_multi 88 6K 7K 166960K 110 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 19 0 ISOFS mount 1 36K 36K 166960K 1 0 MSDOSFS mount 1 20K 20K 166960K 1 0 ttys 85 587K 587K 166960K 85 0 exec 0 0K 2K 166960K 485 0 fusefs mount 1 36K 36K 166960K 1 0 tdb 3 1K 1K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 129 120K 238K 166960K 9926 0 UVM aobj 131 11K 11K 166960K 134 0 pinsyscall 1042 1996K 1998K 166960K 2120 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 2K 166960K 42 0 temp 75 9188K 9192K 166960K 20792 0 kqueue 2 8K 60K 166960K 172 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 37 0 37 1 0 1 1 0 8 1 rtentry 176 132 0 26 6 0 6 6 0 8 0 unpcb 144 1489 0 1484 12 7 5 8 0 8 4 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 736 158 0 92 7 0 7 7 0 8 0 arp 136 23 0 6 1 0 1 1 0 8 0 inpcb 328 849 0 778 18 11 7 7 0 8 0 nd6 152 34 0 7 2 0 2 2 0 8 0 pkpcb 40 6 0 6 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 3 0 3 2 2 0 1 0 8 0 pffrag 232 8 0 0 1 0 1 1 0 482 0 pffrnode 88 6 0 0 1 0 1 1 0 8 0 pffrent 40 13 0 3 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 pftag 88 5 0 0 1 0 1 1 0 8 0 pfqueue 320 2 0 0 1 0 1 1 0 8 0 pfstitem 24 77 0 31 1 0 1 1 0 8 0 pfstkey 128 77 0 31 2 0 2 2 0 8 0 pfstate 448 77 0 31 6 0 6 6 0 8 0 pfrule 1360 29 0 24 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 512 0 90 30 0 30 30 0 8 1 art_table 40 513 0 90 5 0 5 5 0 8 0 art_node 32 132 0 35 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 4 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 72 112 0 102 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2966 0 1496 93 0 93 93 0 8 0 ffsino 296 2966 0 1496 114 0 114 114 0 8 0 nchpl 144 4275 0 2567 64 0 64 64 0 8 0 vnodes 216 3671 0 0 204 0 204 204 0 8 0 namei 1024 14911 0 14910 3 2 1 1 0 8 0 percpumem 16 63 0 12 1 0 1 1 0 8 0 kstatmem 264 51 0 24 2 0 2 2 0 8 0 scxspl 216 13415 0 13415 12 10 2 8 1 8 2 plimitpl 152 90 0 81 1 0 1 1 0 8 0 sigapl 424 1266 0 1211 8 0 8 8 0 8 0 knotepl 120 159 0 0 5 0 5 5 0 8 0 kqueuepl 224 349 0 345 6 2 4 4 0 8 3 pipepl 344 362 0 335 6 3 3 6 0 8 0 fdescpl 528 1229 0 1210 3 0 3 3 0 8 0 filepl 160 8905 0 8665 21 8 13 18 0 8 2 lockfpl 104 480 0 476 2 1 1 2 0 8 0 lockfspl 48 232 0 228 1 0 1 1 0 8 0 sessionpl 144 79 0 77 1 0 1 1 0 8 0 pgrppl 48 104 0 93 1 0 1 1 0 8 0 ucredpl 104 1631 0 1628 1 0 1 1 0 8 0 zombiepl 144 1214 0 1211 2 1 1 1 0 8 0 processpl 1232 1266 0 1211 6 0 6 6 0 8 0 procpl 664 2458 0 2397 8 0 8 8 0 8 1 sosppl 176 12 0 12 3 2 1 1 0 8 1 sockpl 752 2398 0 2322 46 37 9 23 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl9k128 9344 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mextrefs 64 18 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 8619 0 0 539 0 539 539 0 8 0 bufpl 272 3756 0 106 244 0 244 244 0 8 0 anonpl 32 7684 0 0 62 0 62 62 0 222 0 amapchunkpl 152 31790 0 31441 30 10 20 27 0 158 4 amappl16 200 3151 0 3123 17 14 3 14 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 447 0 447 1 0 1 1 0 8 1 amappl13 176 128 0 128 1 0 1 1 0 8 1 amappl12 168 1499 0 1482 2 0 2 2 0 8 0 amappl11 160 26 0 26 5 4 1 1 0 8 1 amappl10 152 65 0 64 1 0 1 1 0 8 0 amappl9 144 277 0 276 2 1 1 1 0 8 0 amappl8 136 123 0 122 1 0 1 1 0 8 0 amappl7 128 156 0 154 1 0 1 1 0 8 0 amappl6 120 165 0 165 1 0 1 1 0 8 1 amappl5 112 109 0 108 1 0 1 1 0 8 0 amappl4 104 313 0 308 1 0 1 1 0 8 0 amappl3 96 6668 0 6589 4 0 4 4 0 8 0 amappl2 88 557 0 547 2 0 2 2 0 8 0 amappl1 80 13751 0 13660 15 2 13 15 0 8 6 amappl 88 9050 0 8933 5 0 5 5 0 92 0 uvmvnodes 80 119 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 128 253 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 1229 0 1210 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1229 0 1210 1 0 1 1 0 8 0 vmmpekpl 168 11710 0 11677 3 0 3 3 0 8 0 vmmpepl 168 83031 0 82210 98 10 88 96 0 357 39 vmsppl 488 1228 0 1210 6 2 4 5 0 8 0 rwobjpl 80 24015 0 23478 29 3 26 28 0 8 2 pdppl 4096 2467 0 2420 105 56 49 85 0 8 2 pvpl 32 14342 0 0 117 1 116 116 0 265 0 pmappl 256 1228 0 1210 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 120 1062 0 63 31 0 31 31 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x17 sys/arch/amd64/amd64/db_interface.c:457 panic(ffffffff84632b4f) at panic+0x270 sys/kern/subr_prf.c:198 kasan_memcpy(ffff800001e853b0,ffff800001eb45c8,68) at kasan_memcpy+0x1ec sysctl_sysvipc(ffff8000299b7d68,1,200000000040,ffff8000299b7d40) at sysctl_sysvipc+0x746 sys/kern/kern_sysctl.c:2781 kern_sysctl_dirs(33,ffff8000299b7d68,1,200000000040,ffff8000299b7d40,0,1,1ffff00005336f24) at kern_sysctl_dirs+0x30f sys/kern/kern_sysctl.c:429 kern_sysctl(ffff8000299b7d64,2,200000000040,ffff8000299b7d40,0,0,ffff8000299b7fc0) at kern_sysctl+0x1ce sys/kern/kern_sysctl.c:529 sys_sysctl(ffff800029895c90,ffff8000299b7fc0,ffff8000299b7f20) at sys_sysctl+0x54f sys/kern/kern_sysctl.c:309 syscall(ffff8000299b7fc0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000299b7fc0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3ec7afd7d60, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x19: leave x86_ipi_db(ffff800028fe3ff0) at x86_ipi_db+0x19 sys/arch/amd64/amd64/db_interface.c:412 x86_ipi_handler() at x86_ipi_handler+0x112 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x63c sys/dev/acpi/acpicpu_x86.c:-1 sched_idle(ffff800028fe3ff0) at sched_idle+0x566 sys/kern/kern_sched.c:204 end trace frame: 0x0, count: 10 ddb{1}>