panic: Caught invalid memory access at ffff800045ff1890 size 8 op 0 Stopped at db_enter+0x17: popq %rbp TID PID UID PRFLAGS PFLAGS CPU COMMAND 250677 16801 0 0 0 0 syz-executor *467366 19180 0 0 0x4000000 1K 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 __asan_load8_noabort(ffff800045ff1890) at __asan_load8_noabort+0xde kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline] __asan_load8_noabort(ffff800045ff1890) at __asan_load8_noabort+0xde sys/kern/subr_kasan.c:1099 doktrace(ffff800001c7a968,4,814,0,ffff800045ffca78) at doktrace+0x9ff ktrsetchildren sys/kern/kern_ktrace.c:602 [inline] doktrace(ffff800001c7a968,4,814,0,ffff800045ffca78) at doktrace+0x9ff sys/kern/kern_ktrace.c:518 sys_ktrace(ffff800045ffca78,ffff80003bb862d0,ffff80003bb86240) at sys_ktrace+0x1f6 sys/kern/kern_ktrace.c:559 syscall(ffff80003bb862d0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bb862d0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf88312a7260, count: 8 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: Caught invalid memory access at ffff800045ff1890 size 8 op 0 ddb{1}> show kasan KASAN: invalid read of 8 bytes at 0xffff800045ff1890 from pc 0xffffffff819ba03f KASAN: first bad byte at 0xffff800045ff1890 (+0); shadow 0xfd: pool use-after-free (or unallocated item) KASAN: 0xffff800045ff1890 is 96 bytes inside the 1232-byte item [0xffff800045ff1830..0xffff800045ff1d00) in pool 'processpl' KASAN: allocated at: #0 pool_get+0x770 sys/kern/subr_pool.c:733 #1 process_new+0x47 sys/kern/kern_fork.c:221 #2 fork1+0x533 sys/kern/kern_fork.c:408 #3 kthread_create+0xa8 sys/kern/kern_kthread.c:61 #4 sys_acct+0x35e acct_start sys/kern/kern_acct.c:300 [inline] #4 sys_acct+0x35e sys/kern/kern_acct.c:151 #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: freed at: #0 pool_put+0x79 sys/kern/subr_pool.c:918 #1 process_zap+0x457 sys/kern/kern_exit.c:898 #2 reaper+0x3e6 sys/kern/kern_exit.c:525 #3 proc_trampoline+0x10 KASAN: pc: doktrace+0x9ff KASAN: call trace: #0 __asan_load8_noabort+0xbd kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline] #0 __asan_load8_noabort+0xbd sys/kern/subr_kasan.c:1099 #1 doktrace+0x9ff ktrsetchildren sys/kern/kern_ktrace.c:602 [inline] #1 doktrace+0x9ff sys/kern/kern_ktrace.c:518 #2 sys_ktrace+0x1f6 sys/kern/kern_ktrace.c:559 #3 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #4 Xsyscall+0x128 KASAN: shadow of 0xffff800045ff1780..0xffff800045ff1a00 (1 cell = 8 bytes): 0xffff800045ff1780: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0xffff800045ff1800: fd fd fd fd fd fd 08 08 fd fd fd fd fd fd fd fd >0xffff800045ff1880: fd fd[fd]fd fd fd fd fd fd fd fd fd fd fd fd fd 0xffff800045ff1900: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0xffff800045ff1980: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 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{1}> 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 __asan_load8_noabort(ffff800045ff1890) at __asan_load8_noabort+0xde kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline] __asan_load8_noabort(ffff800045ff1890) at __asan_load8_noabort+0xde sys/kern/subr_kasan.c:1099 doktrace(ffff800001c7a968,4,814,0,ffff800045ffca78) at doktrace+0x9ff ktrsetchildren sys/kern/kern_ktrace.c:602 [inline] doktrace(ffff800001c7a968,4,814,0,ffff800045ffca78) at doktrace+0x9ff sys/kern/kern_ktrace.c:518 sys_ktrace(ffff800045ffca78,ffff80003bb862d0,ffff80003bb86240) at sys_ktrace+0x1f6 sys/kern/kern_ktrace.c:559 syscall(ffff80003bb862d0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bb862d0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf88312a7260, count: -7 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003bb85cd0 rbx 0xffff80003bb85d40 rdx 0 rcx 0xffff800028fe3ff0 rax 0xffff80000015cb00 r8 0x101010101010101 r9 0x8080808080808080 r10 0xffff80003bb85ab8 r11 0xffffffff8416f5d0 x86_bus_space_io_read_1 r12 0xffffffff84632b4f .str.28+0x9b28f r13 0xffff800028fe4c08 r14 0xffff800028fe4e07 r15 0x1 rip 0xffffffff82a38477 db_enter+0x17 cs 0x8 rflags 0x246 rsp 0xffff80003bb85cd0 ss 0x10 db_enter+0x17: popq %rbp ddb{1}> show proc PROC (syz-executor) tid=467366 pid=19180 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045ff5248,0xffff800045ff47f8 process=0xffff800045ff09c0 user=0xffff80003bb7b000, vmspace=0xffff800001c45018 estcpu=36, cpticks=22, pctcpu=0.0, user=1, sys=21, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16801 250677 20077 0 7 0 syz-executor 51124 109213 81759 0 2 0 syz-executor 51124 441355 81759 0 3 0x4000080 fsleep syz-executor 43604 372995 23696 0 2 0 syz-executor 43604 507363 23696 0 3 0x4000080 kqread syz-executor 43604 64197 23696 0 3 0x4000080 fsleep syz-executor 43604 36802 23696 0 3 0x4000080 fsleep syz-executor 63243 334104 10003 0 2 0 syz-executor 63243 233890 10003 0 3 0x4000080 fsleep syz-executor 92615 58623 24817 0 2 0 syz-executor 92615 47178 24817 0 3 0x4000080 fsleep syz-executor 18125 436332 83422 0 2 0 syz-executor 18125 171357 83422 0 2 0x4000000 syz-executor 19180 170435 35247 0 2 0 syz-executor *19180 467366 35247 0 7 0x4000000 syz-executor 19180 352268 35247 0 3 0x4000080 fsleep syz-executor 97963 95515 36401 0 2 0x82000 syz-executor 97963 456333 36401 0 3 0x4002000 suspend syz-executor 24817 384273 49210 0 3 0x82 nanoslp syz-executor 36401 508411 49210 0 3 0x82 nanoslp syz-executor 81759 341247 49210 0 3 0x82 nanoslp syz-executor 10003 299985 49210 0 3 0x82 nanoslp syz-executor 35247 284380 49210 0 3 0x82 nanoslp syz-executor 83422 185596 49210 0 3 0x82 nanoslp syz-executor 20077 342533 49210 0 3 0x82 nanoslp syz-executor 23696 344988 49210 0 3 0x82 nanoslp syz-executor 49210 206838 33930 0 3 0x82 kqread syz-executor 33930 306008 90938 0 3 0x10008a sigsusp ksh 90938 322547 85234 0 3 0x98 kqread sshd-session 85234 194933 25327 0 3 0x92 kqread sshd-session 9047 482397 1 0 3 0x100083 ttyin getty 25327 43187 1 0 3 0x88 kqread sshd 16980 205411 34135 74 3 0x1100092 bpf pflogd 34135 212732 1 0 3 0x80 sbwait pflogd 62390 195220 39493 73 3 0x1100090 kqread syslogd 39493 451317 1 0 3 0x100082 sbwait syslogd 33018 513846 1 0 3 0x100080 kqread resolvd 82115 271981 50104 77 3 0x100092 kqread dhcpleased 22064 57387 50104 77 3 0x100092 kqread dhcpleased 50104 253364 1 0 3 0x80 kqread dhcpleased 44104 240036 0 0 3 0x14200 bored smr 66407 241123 0 0 2 0x14200 zerothread 82500 262331 0 0 3 0x14200 aiodoned aiodoned 13097 417030 0 0 3 0x14200 syncer update 9293 381704 0 0 3 0x14200 cleaner cleaner 84932 127642 0 0 3 0x14200 reaper reaper 61323 163687 0 0 3 0x14200 pgdaemon pagedaemon 53154 206343 0 0 3 0x14200 bored viomb 69525 119751 0 0 3 0x40014200 acpi0 acpi0 26424 193184 0 0 3 0x40014200 idle1 62912 191502 0 0 3 0x14200 bored softnet1 40970 369972 0 0 3 0x14200 bored softnet0 29400 480221 0 0 3 0x14200 bored systqmp 19531 454362 0 0 3 0x14200 bored systq 74066 203402 0 0 3 0x14200 tmoslp softclockmp 11226 185810 0 0 3 0x40014200 tmoslp softclock 67183 273061 0 0 3 0x40014200 idle0 1 457268 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 19180 (syz-executor) thread 0xffff800045ffca78 (467366) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8542a300) #0 witness_lock+0x632 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x632 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x423 sys/kern/kern_synch.c:369 #3 biowait+0xe6 sys/kern/vfs_bio.c:1110 #4 bwrite+0x4e1 sys/kern/vfs_bio.c:625 #5 ffs_update+0x619 sys/ufs/ffs/ffs_inode.c:111 #6 ffs_truncate+0x12f0 sys/ufs/ffs/ffs_inode.c:-1 #7 ufs_inactive+0x2cb sys/ufs/ufs/ufs_inode.c:84 #8 VOP_INACTIVE+0x1bb sys/kern/vfs_vops.c:498 #9 vrele+0x16a sys/kern/vfs_subr.c:845 #10 ktrsettrace+0x16c sys/kern/kern_ktrace.c:122 #11 ktrops+0x338 sys/kern/kern_ktrace.c:574 #12 doktrace+0x9e8 ktrsetchildren sys/kern/kern_ktrace.c:596 [inline] #12 doktrace+0x9e8 sys/kern/kern_ktrace.c:518 #13 sys_ktrace+0x1f6 sys/kern/kern_ktrace.c:559 #14 syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] #14 syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 #15 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11064 12324K 12324K 166960K 12190 0 pcb 17 28K 33K 166960K 105 0 rtable 239 12K 13K 166960K 353 0 pf 34 22K 24K 166960K 47 0 ifaddr 43 12K 12K 166960K 45 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 13K 166960K 5 0 counters 70 42K 42K 166960K 70 0 ioctlops 0 0K 4K 166960K 1526 0 iov 0 0K 20K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1361 87K 87K 166960K 1483 0 UFS quota 1 36K 36K 166960K 1 0 UFS mount 5 44K 44K 166960K 5 0 shm 2 2K 10K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 292K 166960K 11964 0 file desc 18 65K 93K 166960K 217 0 proc 74 145K 177K 166960K 573 0 subproc 72 9K 9K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 20K 20K 166960K 1 0 in_multi 99 7K 7K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 36K 36K 166960K 1 0 MSDOSFS mount 1 20K 20K 166960K 1 0 ttys 49 344K 344K 166960K 49 0 exec 0 0K 2K 166960K 387 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 239 245K 262K 166960K 3828 0 UVM aobj 12 4K 4K 166960K 12 0 pinsyscall 1067 1752K 1752K 166960K 1376 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 12 0K 2K 166960K 28 0 temp 76 9172K 9185K 166960K 4711 0 kqueue 14 44K 48K 166960K 42 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 34 0 31 1 0 1 1 0 8 0 rtentry 176 112 0 1 6 0 6 6 0 8 0 unpcb 144 106 0 86 2 0 2 2 0 8 1 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 54 0 48 4 0 4 4 0 8 3 arp 136 19 0 0 1 0 1 1 0 8 0 inpcb 328 197 0 187 7 0 7 7 0 8 6 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 0 0 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 0 5 5 0 8 5 pfosfpen 112 1428 0 1428 21 0 21 21 0 8 21 pfstitem 24 26 0 0 1 0 1 1 0 8 0 pfstkey 128 26 0 0 1 0 1 1 0 8 0 pfstate 448 26 0 0 3 0 3 3 0 8 0 pfrule 1360 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semapl 72 11 0 1 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1708 0 234 93 0 93 93 0 8 0 ffsino 296 1708 0 234 114 0 114 114 0 8 0 nchpl 144 2012 0 306 64 0 64 64 0 8 0 vnodes 216 1897 0 0 106 0 106 106 0 8 0 namei 1024 6715 0 6715 2 0 2 2 0 8 2 percpumem 16 51 0 0 1 0 1 1 0 8 0 kstatmem 264 27 0 0 2 0 2 2 0 8 0 scxspl 216 7239 0 7239 2 1 1 2 1 8 1 plimitpl 152 33 0 16 1 0 1 1 0 8 0 sigapl 424 536 0 488 7 0 7 7 0 8 1 knotepl 120 62 0 0 2 0 2 2 0 8 0 kqueuepl 224 54 0 44 1 0 1 1 0 8 0 pipepl 344 140 0 112 3 0 3 3 0 8 0 fdescpl 528 519 0 487 3 0 3 3 0 8 0 filepl 160 2352 0 2062 13 0 13 13 0 8 0 lockfpl 104 38 0 34 1 0 1 1 0 8 0 lockfspl 48 19 0 15 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 35 0 18 1 0 1 1 0 8 0 ucredpl 104 166 0 153 1 0 1 1 0 8 0 zombiepl 144 488 0 488 1 0 1 1 0 8 1 processpl 1232 536 0 488 5 0 5 5 0 8 0 procpl 664 675 0 617 6 0 6 6 0 8 0 sockpl 752 340 0 307 12 0 12 12 0 8 8 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k 2048 18 0 0 3 0 3 3 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 241 0 0 15 0 15 15 0 8 0 bufpl 272 2513 0 138 159 0 159 159 0 8 0 anonpl 32 5309 0 0 43 0 43 43 0 222 0 amapchunkpl 152 10965 0 10468 23 0 23 23 0 158 2 amappl16 200 2070 0 2039 5 3 2 5 0 8 0 amappl15 192 102 0 102 1 1 0 1 0 8 0 amappl14 184 434 0 432 1 0 1 1 0 8 0 amappl13 176 138 0 126 1 0 1 1 0 8 0 amappl12 168 803 0 772 2 0 2 2 0 8 0 amappl11 160 9 0 9 2 1 1 1 0 8 1 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 96 0 94 1 0 1 1 0 8 0 amappl7 128 152 0 139 1 0 1 1 0 8 0 amappl6 120 154 0 153 1 0 1 1 0 8 0 amappl5 112 109 0 97 1 0 1 1 0 8 0 amappl4 104 298 0 277 1 0 1 1 0 8 0 amappl3 96 1982 0 1863 4 0 4 4 0 8 0 amappl2 88 545 0 481 2 0 2 2 0 8 0 amappl1 80 10774 0 10172 16 1 15 15 0 8 2 amappl 88 3088 0 2922 4 0 4 4 0 92 0 uvmvnodes 80 101 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 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 519 0 487 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 519 0 487 1 0 1 1 0 8 0 vmmpekpl 168 6303 0 6272 2 0 2 2 0 8 0 vmmpepl 168 42635 0 40678 87 0 87 87 0 357 0 vmsppl 488 518 0 487 5 0 5 5 0 8 1 rwobjpl 80 15709 0 14658 24 0 24 24 0 8 1 pdppl 4096 1047 0 974 101 28 73 87 0 8 0 pvpl 32 11203 0 0 92 1 91 91 0 265 0 pmappl 256 518 0 487 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 120 440 0 31 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x19: leave x86_ipi_db(ffffffff8521aff0) 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 __mp_lock(ffffffff85429b00) at __mp_lock+0x283 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff85429b00) at __mp_lock+0x283 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x215 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x7b sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __asan_load4_noabort(ffffffff8542a2f8) at __asan_load4_noabort+0x9 sys/kern/subr_kasan.c:1098 __mp_lock(ffffffff85429b00) at __mp_lock+0x27a __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff85429b00) at __mp_lock+0x27a sys/kern/kern_lock.c:173 syscall(ffff80003bb6df70) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003bb6df70) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ed200b70f40, count: 4 ddb{0}> trace x86_ipi_db(ffffffff8521aff0) 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 __mp_lock(ffffffff85429b00) at __mp_lock+0x283 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff85429b00) at __mp_lock+0x283 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x215 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x7b sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __asan_load4_noabort(ffffffff8542a2f8) at __asan_load4_noabort+0x9 sys/kern/subr_kasan.c:1098 __mp_lock(ffffffff85429b00) at __mp_lock+0x27a __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff85429b00) at __mp_lock+0x27a sys/kern/kern_lock.c:173 syscall(ffff80003bb6df70) at syscall+0x1048 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003bb6df70) at syscall+0x1048 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7ed200b70f40, count: -11 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x17: popq %rbp 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 __asan_load8_noabort(ffff800045ff1890) at __asan_load8_noabort+0xde kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline] __asan_load8_noabort(ffff800045ff1890) at __asan_load8_noabort+0xde sys/kern/subr_kasan.c:1099 doktrace(ffff800001c7a968,4,814,0,ffff800045ffca78) at doktrace+0x9ff ktrsetchildren sys/kern/kern_ktrace.c:602 [inline] doktrace(ffff800001c7a968,4,814,0,ffff800045ffca78) at doktrace+0x9ff sys/kern/kern_ktrace.c:518 sys_ktrace(ffff800045ffca78,ffff80003bb862d0,ffff80003bb86240) at sys_ktrace+0x1f6 sys/kern/kern_ktrace.c:559 syscall(ffff80003bb862d0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bb862d0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf88312a7260, count: 8 ddb{1}> 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 __asan_load8_noabort(ffff800045ff1890) at __asan_load8_noabort+0xde kasan_shadow_check sys/kern/subr_kasan.c:-1 [inline] __asan_load8_noabort(ffff800045ff1890) at __asan_load8_noabort+0xde sys/kern/subr_kasan.c:1099 doktrace(ffff800001c7a968,4,814,0,ffff800045ffca78) at doktrace+0x9ff ktrsetchildren sys/kern/kern_ktrace.c:602 [inline] doktrace(ffff800001c7a968,4,814,0,ffff800045ffca78) at doktrace+0x9ff sys/kern/kern_ktrace.c:518 sys_ktrace(ffff800045ffca78,ffff80003bb862d0,ffff80003bb86240) at sys_ktrace+0x1f6 sys/kern/kern_ktrace.c:559 syscall(ffff80003bb862d0) at syscall+0x1089 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bb862d0) at syscall+0x1089 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf88312a7260, count: -7