login: panic: pool_do_get: shmpl free list modified: page 0xfffffd8067bfb000; item addr 0xfffffd8067bfba80; offset 0x40=0x6877bc7e Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 74848 78005 32767 0x10 0x4000000 0K syz-executor 307201 74915 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833db917) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83966d28,1,ffff80002a3d2a38) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff83966d28,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000ffff22a0,ffff80002a3d2c90,40,ffff80002a3d2be0) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000ffff22a0,ffff80002a3d2c90,ffff80002a3d2be0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3d2c90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3d2c90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xee4a33aba60, count: 7 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: pool_do_get: shmpl free list modified: page 0xfffffd8067bfb000; item addr 0xfffffd8067bfba80; offset 0x40=0x6877bc7e ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833db917) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83966d28,1,ffff80002a3d2a38) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff83966d28,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000ffff22a0,ffff80002a3d2c90,40,ffff80002a3d2be0) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000ffff22a0,ffff80002a3d2c90,ffff80002a3d2be0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3d2c90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3d2c90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xee4a33aba60, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a3d2870 rbx 0xffffffff838c1dd7 cpu_info_full_primary+0x2dd7 rdx 0xffff8000014641c0 rcx 0xffff8000ffff22a0 rax 0xffffffff838c0ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4a8f50349006035b r11 0x8bdc99514d35f022 r12 0xffffffff838c1bd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff81ee0be5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a3d2860 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=74848 pid=78005 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=67, usrpri=68, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a297498,0xffff80003c43f9d8 process=0xffff8000fffec4f0 user=0xffff80002a3cd000, vmspace=0xfffffd806c3de3e0 estcpu=18, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 9667 238795 92718 32767 2 0x10 syz-executor 9667 125589 92718 32767 3 0x4000090 fsleep syz-executor 23229 374764 17284 32767 3 0x90 nanoslp syz-executor 23229 250551 17284 32767 3 0x4000090 fsleep syz-executor 23229 11062 17284 32767 2 0x4000010 syz-executor 23229 181557 17284 32767 3 0x4000090 fsleep syz-executor 78005 96047 58132 32767 3 0x90 nanoslp syz-executor *78005 74848 58132 32767 7 0x4000010 syz-executor 78005 292878 58132 32767 3 0x4000090 fsleep syz-executor 74915 134366 76373 32767 2 0x10 syz-executor 74915 307201 76373 32767 7 0x4000010 syz-executor 85329 147985 96229 32767 2 0x10 syz-executor 85329 343060 96229 32767 3 0x4000090 fsleep syz-executor 86297 172288 96798 32767 2 0x10 syz-executor 86297 523304 96798 32767 3 0x4000090 fsleep syz-executor 92718 102409 74732 32767 3 0x90 nanoslp syz-executor 76373 497748 81945 32767 3 0x90 nanoslp syz-executor 34006 48246 944 32767 3 0x10 biowait syz-executor 96229 102322 63538 32767 3 0x90 nanoslp syz-executor 17284 255325 44598 32767 3 0x90 nanoslp syz-executor 58132 166403 54226 32767 3 0x90 nanoslp syz-executor 96798 273151 96034 32767 3 0x90 nanoslp syz-executor 74732 389867 25631 0 3 0x82 wait syz-executor 944 226100 25631 0 3 0x82 wait syz-executor 44598 346121 25631 0 3 0x82 wait syz-executor 54226 512250 25631 0 3 0x82 wait syz-executor 81945 520615 25631 0 3 0x82 wait syz-executor 63538 285079 25631 0 3 0x82 wait syz-executor 96034 232347 25631 0 3 0x82 wait syz-executor 25631 317292 27969 0 3 0x82 nanoslp syz-executor 27969 473791 19790 0 3 0x10008a sigsusp ksh 19790 69617 90659 0 3 0x98 kqread sshd-session 90659 48585 44027 0 3 0x92 kqread sshd-session 80791 419444 1 0 3 0x100083 ttyin getty 44027 334450 1 0 3 0x88 kqread sshd 48497 322873 53878 73 3 0x1100090 kqread syslogd 53878 294100 1 0 3 0x100082 sbwait syslogd 58230 169375 1 0 3 0x100080 kqread resolvd 51857 75287 73131 77 3 0x100092 kqread dhcpleased 8065 323886 73131 77 3 0x100092 kqread dhcpleased 73131 185349 1 0 3 0x80 kqread dhcpleased 30845 161570 0 0 3 0x14200 bored smr 67743 66732 0 0 2 0x14200 zerothread 59671 265116 0 0 3 0x14200 aiodoned aiodoned 48831 90897 0 0 3 0x14200 syncer update 86875 1440 0 0 3 0x14200 cleaner cleaner 88182 222285 0 0 3 0x14200 reaper reaper 96850 241751 0 0 3 0x14200 pgdaemon pagedaemon 54433 321148 0 0 3 0x14200 bored viomb 45424 61573 0 0 3 0x40014200 acpi0 acpi0 18351 195472 0 0 3 0x40014200 idle1 79004 153350 0 0 3 0x14200 bored softnet3 77986 139785 0 0 3 0x14200 bored softnet2 24048 183997 0 0 3 0x14200 bored softnet1 343 121547 0 0 3 0x14200 bored softnet0 98494 253942 0 0 3 0x14200 bored systqmp 96221 364312 0 0 3 0x14200 bored systq 66629 440717 0 0 3 0x14200 tmoslp softclockmp 23854 61950 0 0 3 0x40014200 tmoslp softclock 30018 321510 0 0 3 0x40014200 idle0 1 5573 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex shmpl r = 0 (0xffffffff83966d40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pool_get+0x10b sys/kern/subr_pool.c:578 #4 shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 78005 (syz-executor) thread 0xffff8000ffff22a0 (74848) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8396d420) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 syscall+0xae6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #1 syscall+0xae6 sys/arch/amd64/amd64/trap.c:748 #2 Xsyscall+0x128 exclusive mutex shmpl r = 0 (0xffffffff83966d40) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pool_get+0x10b sys/kern/subr_pool.c:578 #4 shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 #5 sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #7 Xsyscall+0x128 Process 74915 (syz-executor) thread 0xffff80002a297498 (307201) exclusive rwlock fdlock r = 0 (0xffff8000fffea070) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 doopenat+0x173 sys/kern/vfs_syscalls.c:-1 #3 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #3 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #4 Xsyscall+0x128 Process 34006 (syz-executor) thread 0xffff80002a297c48 (48246) exclusive rrwlock inode r = 0 (0xfffffd80749f3520) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:693 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x19f8 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #11 namei+0x7aa sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1864 #13 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ca03558) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1864 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10184 10953K 10967K 166960K 11265 0 pcb 17 12K 12K 166960K 17 0 rtable 215 6K 7K 166960K 359 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 3 1K 9K 166960K 8 0 counters 66 36K 36K 166960K 68 0 ioctlops 0 0K 2K 166960K 32 0 iov 0 0K 5K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1334 84K 84K 166960K 1426 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 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 22 81K 121K 166960K 251 0 proc 59 91K 127K 166960K 484 0 subproc 63 3K 4K 166960K 144 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 96 0 in_multi 88 6K 7K 166960K 105 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 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 354 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 229 145K 161K 166960K 3471 0 UVM aobj 7 2K 2K 166960K 8 0 pinsyscall 43 86K 110K 166960K 1253 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 3 0 NDP 10 0K 2K 166960K 27 0 temp 70 8683K 8748K 166960K 4150 0 kqueue 13 20K 24K 166960K 38 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 47 0 43 1 0 1 1 0 8 0 rtentry 176 111 0 12 5 0 5 5 0 8 0 unpcb 144 142 0 127 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 30 0 26 1 0 1 1 0 8 0 arp 128 18 0 2 1 0 1 1 0 8 0 inpcb 328 107 0 99 2 0 2 2 0 8 1 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 144 24 0 3 1 0 1 1 0 8 0 kcovpl 48 16 0 9 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 453 0 44 29 0 29 29 0 8 0 art_table 40 454 0 44 5 0 5 5 0 8 0 art_node 32 111 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 pool(0xffffffff83966d28:shmpl): page inconsistency: page 0xfffffd8067bfb000; 30 on list, 4 missing, 35 items per page dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1655 0 140 95 0 95 95 0 8 0 ffsino 288 1655 0 140 109 0 109 109 0 8 0 nchpl 144 1954 0 269 63 0 63 63 0 8 0 uvmvnodes 80 1808 0 0 37 0 37 37 0 8 0 vnodes 216 1808 0 0 101 0 101 101 0 8 0 namei 1024 6108 0 6108 2 0 2 2 0 8 2 percpumem 16 49 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 6212 0 6211 3 2 1 2 1 8 0 plimitpl 152 56 0 34 1 0 1 1 0 8 0 sigapl 424 508 0 456 7 0 7 7 0 8 1 knotepl 120 149 0 0 5 0 5 5 0 8 0 kqueuepl 224 46 0 36 1 0 1 1 0 8 0 pipepl 336 134 0 107 3 0 3 3 0 8 0 fdescpl 520 490 0 456 3 0 3 3 0 8 0 filepl 160 1861 0 1665 10 0 10 10 0 8 0 lockfpl 104 29 0 27 1 0 1 1 0 8 0 lockfspl 48 15 0 13 1 0 1 1 0 8 0 sessionpl 144 29 0 14 1 0 1 1 0 8 0 pgrppl 48 45 0 23 1 0 1 1 0 8 0 ucredpl 104 141 0 123 1 0 1 1 0 8 0 zombiepl 144 456 0 456 1 0 1 1 0 8 1 processpl 1240 508 0 456 5 0 5 5 0 8 0 procpl 656 650 0 589 7 0 7 7 0 8 1 sockpl 728 296 0 269 4 0 4 4 0 8 1 mcl64k 65536 2 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 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 204 0 0 13 0 13 13 0 8 0 bufpl 280 2334 0 116 159 0 159 159 0 8 0 anonpl 32 7294 0 0 59 0 59 59 0 246 0 amapchunkpl 152 10337 0 9638 28 0 28 28 0 158 0 amappl16 200 1249 0 1231 14 4 10 14 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 98 0 88 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 1 0 1 0 8 0 amappl12 168 1086 0 1052 3 0 3 3 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 268 0 267 1 0 1 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 92 0 82 1 0 1 1 0 8 0 amappl6 120 163 0 159 1 0 1 1 0 8 0 amappl5 112 110 0 104 1 0 1 1 0 8 0 amappl4 104 282 0 265 1 0 1 1 0 8 0 amappl3 96 1720 0 1602 4 0 4 4 0 8 0 amappl2 88 584 0 531 2 0 2 2 0 8 0 amappl1 80 8124 0 7554 14 0 14 14 0 8 1 amappl 88 2836 0 2669 5 0 5 5 0 92 1 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 490 0 456 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 490 0 456 1 0 1 1 0 8 0 vmmpekpl 168 5631 0 5587 3 0 3 3 0 8 0 vmmpepl 168 36054 0 34066 102 0 102 102 0 357 10 vmsppl 480 489 0 456 6 0 6 6 0 8 1 rwobjpl 72 13771 0 11139 51 0 51 51 0 8 1 pdppl 4096 987 0 912 109 28 81 95 0 8 6 pvpl 32 13445 0 0 110 1 109 109 0 265 0 pmappl 256 489 0 456 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 395 0 30 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833db917) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_do_get(ffffffff83966d28,1,ffff80002a3d2a38) at pool_do_get+0x5ea sys/kern/subr_pool.c:-1 pool_get(ffffffff83966d28,1) at pool_get+0x149 sys/kern/subr_pool.c:-1 shmget_allocate_segment(ffff8000ffff22a0,ffff80002a3d2c90,40,ffff80002a3d2be0) at shmget_allocate_segment+0x1a7 sys/kern/sysv_shm.c:-1 sys_shmget(ffff8000ffff22a0,ffff80002a3d2c90,ffff80002a3d2be0) at sys_shmget+0x1b2 sys/kern/sysv_shm.c:482 syscall(ffff80002a3d2c90) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3d2c90) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xee4a33aba60, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299ddff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 sys/dev/kcov.c:153 __mp_lock(ffffffff8396d218) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8396d218) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 doopenat(ffff80002a297498,ffffff9c,200000000000,0,0,ffff80002a3cc780) at doopenat+0x314 sys/kern/vfs_syscalls.c:1137 syscall(ffff80002a3cc830) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3cc830) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd33b5ee6e00, count: 7 ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x54 sys/dev/kcov.c:153 __mp_lock(ffffffff8396d218) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8396d218) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 doopenat(ffff80002a297498,ffffff9c,200000000000,0,0,ffff80002a3cc780) at doopenat+0x314 sys/kern/vfs_syscalls.c:1137 syscall(ffff80002a3cc830) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3cc830) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd33b5ee6e00, count: -8