panic: pool_p_free: rttmr free list modified: page 0xfffffd805e1dc000; item addr 0xfffffd805e1dccd8; offset 0x10=0x838bd610 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 150907 41052 74 0x1100012 0 0K pflogd *225031 95662 0 0x14000 0x200 1 systqmp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83368f6d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff83930ac0,fffffd805e1dcf90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1587 taskq_thread(ffffffff83818100) at taskq_thread+0x157 sys/kern/kern_task.c:446 end trace frame: 0x0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: pool_p_free: rttmr free list modified: page 0xfffffd805e1dc000; item addr 0xfffffd805e1dccd8; offset 0x10=0x838bd610 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83368f6d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff83930ac0,fffffd805e1dcf90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1587 taskq_thread(ffffffff83818100) at taskq_thread+0x157 sys/kern/kern_task.c:446 end trace frame: 0x0, count: -5 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a21a690 rbx 0xffff8000299eeddf rdx 0 rcx 0xffff8000ffffe000 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x30a2ce7f24dfb526 r11 0xe8ecd14016845f53 r12 0xffff8000299eebe0 r13 0 r14 0 r15 0x1 rip 0xffffffff810cda35 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a21a680 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (systqmp) tid=225031 pid=95662 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffe298,0xffff8000ffffe540 process=0xffff8000ffff89c0 user=0xffff80002a215000, vmspace=0xffffffff83874bf0 estcpu=0, cpticks=6, pctcpu=0.1, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 62373 280870 95829 0 2 0 syz-executor 49538 302756 45431 0 2 0 syz-executor 42066 194606 99305 0 2 0 syz-executor 42066 345956 99305 0 2 0x4000000 syz-executor 97902 150581 31291 0 2 0 syz-executor 97902 122043 31291 0 3 0x4000080 fsleep syz-executor 91119 23587 90781 0 2 0xc82 syz-executor 71258 114655 39752 0 3 0x3000 suspend syz-executor 71258 342593 39752 0 2 0x4081000 syz-executor 626 473784 0 0 3 0x14200 acct acct 26609 285604 0 0 3 0x14280 nfsidl nfsio 28614 27356 0 0 3 0x14280 nfsidl nfsio 37628 323781 0 0 3 0x14280 nfsidl nfsio 45431 496265 90781 0 2 0xc82 syz-executor 81623 255557 90781 0 3 0x82 wait syz-executor 99305 126691 90781 0 2 0xc82 syz-executor 98759 489849 90781 0 2 0x2 syz-executor 90966 167334 1 0 3 0x100083 ttyopn getty 39752 449397 90781 0 3 0x82 wait syz-executor 42815 63101 0 0 3 0x14200 bored sosplice 95829 7011 90781 0 2 0xc82 syz-executor 31291 456760 90781 0 2 0xc82 syz-executor 90781 16587 53998 0 2 0x882 syz-executor 53998 371340 30457 0 3 0x10008a sigsusp ksh 30457 187890 1512 0 3 0x98 kqread sshd-session 1512 67557 73382 0 3 0x92 kqread sshd-session 73382 38353 1 0 3 0x88 kqread sshd 41052 150907 50980 74 7 0x1100012 pflogd 50980 501804 1 0 3 0x80 sbwait pflogd 7337 66823 45559 73 3 0x1100090 kqread syslogd 45559 264325 1 0 3 0x100082 sbwait syslogd 18865 421485 1 0 3 0x100080 kqread resolvd 26303 128179 62005 77 3 0x100092 kqread dhcpleased 23579 37120 62005 77 3 0x100092 kqread dhcpleased 62005 343278 1 0 3 0x80 kqread dhcpleased 83375 8923 0 0 2 0x14200 smr 39454 178656 0 0 2 0x14200 zerothread 8665 345004 0 0 3 0x14200 aiodoned aiodoned 66474 194440 0 0 2 0x14e00 update 24955 159715 0 0 3 0x14200 cleaner cleaner 70271 256252 0 0 3 0x14200 reaper reaper 97083 261691 0 0 3 0x14200 pgdaemon pagedaemon 40894 19183 0 0 3 0x14200 bored viomb 92782 512786 0 0 3 0x40014200 acpi0 acpi0 26024 227368 0 0 3 0x40014200 idle1 12873 94400 0 0 3 0x14200 bored softnet7 33020 283061 0 0 3 0x14200 bored softnet6 61431 491333 0 0 3 0x14200 bored softnet5 11370 158199 0 0 3 0x14200 bored softnet4 17033 167268 0 0 3 0x14200 bored softnet3 42342 289504 0 0 3 0x14200 bored softnet2 58467 351389 0 0 3 0x14200 bored softnet1 18366 109151 0 0 2 0x14200 softnet0 *95662 225031 0 0 7 0x14200 systqmp 79023 248537 0 0 3 0x14200 bored systq 39759 496703 0 0 3 0x14200 tmoslp softclockmp 74237 469913 0 0 2 0x40014200 softclock 65215 384302 0 0 3 0x40014200 idle0 1 377229 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 71258 (syz-executor) thread 0xffff800031c08a80 (342593) exclusive rrwlock inode r = 0 (0xfffffd805a0ccc80) #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 Process 98759 (syz-executor) thread 0xffff800031c08020 (489849) exclusive rrwlock inode r = 0 (0xfffffd805def2da0) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e100810) #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 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 41052 (pflogd) thread 0xffff80002a2b9240 (150907) exclusive rrwlock inode r = 0 (0xfffffd806d5e3a00) #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 vget+0x2a2 sys/kern/vfs_subr.c:693 #6 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:688 #7 ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] #7 ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 #8 syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] #8 syscall+0x304 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839b7b70) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] #1 ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 #2 syscall+0x304 mi_syscall sys/sys/syscall_mi.h:154 [inline] #2 syscall+0x304 sys/arch/amd64/amd64/trap.c:748 #3 Xsyscall+0x128 Process 95662 (systqmp) thread 0xffff8000ffffe000 (225031) shared rwlock pools r = 0 (0xffffffff83805288) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 pool_gc_pages+0x2e sys/kern/subr_pool.c:1564 #3 taskq_thread+0x157 sys/kern/kern_task.c:446 #4 proc_trampoline+0x10 shared rwlock systqmp r = 0 (0xffffffff83818178) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10256 11080K 11520K 166960K 14577 0 pcb 17 20K 22K 166960K 1072 0 rtable 208 13K 14K 166960K 1086 0 pf 45 19K 82K 166960K 503 0 ifaddr 41 8K 9K 166960K 248 0 ifgroup 64 2K 3K 166960K 439 0 sysctl 4 1K 9K 166960K 27 0 counters 74 37K 38K 166960K 682 0 ioctlops 0 0K 4K 166960K 2316 0 iov 0 0K 28K 166960K 226 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1534 97K 97K 166960K 4527 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 24 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 115 0 dirhash 12 2K 2K 166960K 84 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 3745 0 sigio 0 0K 0K 166960K 119 0 proc 72 115K 164K 166960K 1263 0 subproc 72 4K 4K 166960K 164 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 784 0 in_multi 77 5K 7K 166960K 397 0 ether_multi 1 0K 0K 166960K 61 0 mrt 1 0K 0K 166960K 19 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 1046 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 6 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 228 159K 181K 166960K 35015 0 UVM aobj 54 2K 2K 166960K 60 0 pinsyscall 42 84K 103K 166960K 5092 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 211 0 NDP 14 0K 2K 166960K 183 0 temp 82 8652K 8908K 166960K 167298 0 kqueue 14 22K 30K 166960K 666 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 312 0 309 2 1 1 2 0 8 0 rtentry 176 289 0 216 5 0 5 5 0 8 0 unpcb 144 3097 0 3079 25 24 1 6 0 8 0 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpcb 736 1263 0 1257 40 35 5 10 0 8 4 arp 128 32 0 23 1 0 1 1 0 8 0 inpcb 328 4681 0 4672 51 44 7 13 0 8 5 nd6 144 48 0 35 1 0 1 1 0 8 0 pkpcb 40 32 0 32 8 7 1 1 0 8 1 kcovpl 48 18 0 10 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 260 0 259 3 2 1 1 0 8 0 pppxif 1504 16 0 15 5 4 1 1 0 8 0 pfstscr 40 9 0 8 3 2 1 1 0 8 0 pffrag 232 27 0 21 1 0 1 1 0 482 0 pffrnode 88 15 0 10 1 0 1 1 0 8 0 pffrent 40 128 0 122 2 1 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 8 0 8 2 2 0 1 0 8 0 pfanchor 1288 3 0 1 1 0 1 1 0 8 0 pftag 88 4 0 1 2 1 1 1 0 8 0 pfstitem 24 362 0 260 1 0 1 1 0 8 0 pfstkey 128 377 0 275 4 0 4 4 0 8 0 pfstate 384 367 0 268 15 5 10 15 0 8 0 pfrule 1344 74 0 69 2 1 1 2 0 8 0 rttmr 136 8 0 8 4 4 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 1440 0 1074 38 14 24 28 0 8 0 art_table 40 1444 0 1074 5 0 5 5 0 8 0 art_node 32 281 0 217 1 0 1 1 0 8 0 sysvmsgpl 40 19 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 108 0 98 1 0 1 1 0 8 0 shmpl 112 57 0 6 2 0 2 2 0 8 0 dirhash 1024 65 0 48 3 0 3 3 0 8 0 dino2pl 256 8665 0 7124 97 0 97 97 0 8 0 ffsino 296 8665 0 7124 119 0 119 119 0 8 0 nchpl 144 13939 0 13299 64 39 25 64 0 8 0 rtmask 32 43 0 43 9 8 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 49215 0 49214 7 6 1 3 0 8 0 percpumem 16 356 0 304 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 2 1 1 0 1 0 8 0 kstatmem 264 294 0 262 5 2 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 18 0 18 8 7 1 1 0 8 1 scxspl 216 113011 0 113011 19 15 4 8 1 8 4 plimitpl 152 1312 0 1293 1 0 1 1 0 8 0 sigapl 424 4024 0 3966 7 0 7 7 0 8 0 knotepl 120 989 0 0 30 0 30 30 0 8 0 kqueuepl 224 1930 0 1919 27 25 2 5 0 8 1 pipepl 344 568 0 540 14 11 3 9 0 8 0 fdescpl 528 3983 0 3952 3 0 3 3 0 8 0 filepl 160 29588 0 29367 49 36 13 21 0 8 2 lockfpl 104 1930 0 1927 3 2 1 2 0 8 0 lockfspl 48 695 0 692 1 0 1 1 0 8 0 sessionpl 144 37 0 28 1 0 1 1 0 8 0 pgrppl 48 176 0 159 1 0 1 1 0 8 0 ucredpl 104 5371 0 5356 1 0 1 1 0 8 0 zombiepl 144 4498 0 4495 2 1 1 1 0 8 0 processpl 1248 4024 0 3966 5 0 5 5 0 8 0 procpl 664 10057 0 9996 7 0 7 7 0 8 0 sosppl 168 28 0 28 8 7 1 1 0 8 1 sockpl 752 8284 0 8254 102 91 11 27 0 8 7 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 105 0 0 8 1 7 7 0 8 0 mtagpl 96 20 0 0 1 0 1 1 0 8 0 mbufpl 256 1252 0 0 75 0 75 75 0 8 0 bufpl 280 48182 0 42039 441 1 440 440 0 8 0 anonpl 32 16082 0 0 130 0 130 130 0 246 0 amapchunkpl 152 122761 0 122285 69 35 34 34 0 158 8 amappl16 200 15390 0 15113 137 113 24 40 0 8 9 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 142 0 129 1 0 1 1 0 8 0 amappl13 176 11 0 11 3 3 0 1 0 8 0 amappl12 168 4798 0 4767 3 1 2 2 0 8 0 amappl11 160 52 0 38 1 0 1 1 0 8 0 amappl10 152 5 0 4 1 0 1 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 131 0 118 1 0 1 1 0 8 0 amappl6 120 284 0 280 1 0 1 1 0 8 0 amappl5 112 165 0 155 1 0 1 1 0 8 0 amappl4 104 322 0 303 1 0 1 1 0 8 0 amappl3 96 25153 0 25044 4 0 4 4 0 8 0 amappl2 88 899 0 835 2 0 2 2 0 8 0 amappl1 80 23800 0 23202 15 1 14 15 0 8 0 amappl 88 33505 0 33350 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 2 0 2 2 2 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 263 0 263 8 7 1 1 0 8 1 dma64 64 8 0 8 3 3 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 23 0 22 1 0 1 1 0 8 0 aobjpl 72 59 0 6 1 0 1 1 0 8 0 uaddrrnd 24 3983 0 3952 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3983 0 3952 1 0 1 1 0 8 0 vmmpekpl 168 30244 0 30173 4 0 4 4 0 8 0 vmmpepl 168 252104 0 249861 166 59 107 121 0 357 3 vmsppl 488 3982 0 3952 6 1 5 5 0 8 0 rwobjpl 80 70608 0 63453 174 24 150 156 0 8 2 pdppl 4096 7974 0 7904 138 66 72 86 0 8 2 pvpl 32 24506 0 0 197 0 197 197 0 265 0 pmappl 256 3982 0 3952 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 445 0 132 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8378dff0) 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 __mp_lock(ffffffff839b7968) at __mp_lock+0x154 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b7968) at __mp_lock+0x154 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff839b7968,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 msleep_nsec(ffff80000140de00,ffff80000140de08,11a,ffffffff8335d8cd,ffffffffffffffff) at msleep_nsec+0x1f8 sys/kern/kern_synch.c:-1 bpfread(21700,ffff80002a2d5c28,0) at bpfread+0x2f7 sys/net/bpf.c:-1 spec_read(ffff80002a2d5a80) at spec_read+0x14b sys/kern/spec_vnops.c:215 VOP_READ(fffffd807822c9a0,ffff80002a2d5c28,0,fffffd80097fb9c0) at VOP_READ+0x101 sys/kern/vfs_vops.c:227 vn_read(fffffd806e49e650,ffff80002a2d5c28,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff80002a2b9240,4,ffff80002a2d5c28,0,ffff80002a2d5ce0) at dofilereadv+0x25a sys/kern/sys_generic.c:252 sys_read(ffff80002a2b9240,ffff80002a2d5d90,ffff80002a2d5ce0) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a2d5d90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d5d90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c766a25f50, count: 1 ddb{0}> trace x86_ipi_db(ffffffff8378dff0) 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 __mp_lock(ffffffff839b7968) at __mp_lock+0x154 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839b7968) at __mp_lock+0x154 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff839b7968,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 msleep_nsec(ffff80000140de00,ffff80000140de08,11a,ffffffff8335d8cd,ffffffffffffffff) at msleep_nsec+0x1f8 sys/kern/kern_synch.c:-1 bpfread(21700,ffff80002a2d5c28,0) at bpfread+0x2f7 sys/net/bpf.c:-1 spec_read(ffff80002a2d5a80) at spec_read+0x14b sys/kern/spec_vnops.c:215 VOP_READ(fffffd807822c9a0,ffff80002a2d5c28,0,fffffd80097fb9c0) at VOP_READ+0x101 sys/kern/vfs_vops.c:227 vn_read(fffffd806e49e650,ffff80002a2d5c28,0) at vn_read+0x17b sys/kern/vfs_vnops.c:369 dofilereadv(ffff80002a2b9240,4,ffff80002a2d5c28,0,ffff80002a2d5ce0) at dofilereadv+0x25a sys/kern/sys_generic.c:252 sys_read(ffff80002a2b9240,ffff80002a2d5d90,ffff80002a2d5ce0) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a2d5d90) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2d5d90) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c766a25f50, count: -14 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83368f6d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff83930ac0,fffffd805e1dcf90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1587 taskq_thread(ffffffff83818100) at taskq_thread+0x157 sys/kern/kern_task.c:446 end trace frame: 0x0, count: 10 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83368f6d) at panic+0x1e5 sys/kern/subr_prf.c:198 pool_p_free(ffffffff83930ac0,fffffd805e1dcf90) at pool_p_free+0x2d1 sys/kern/subr_pool.c:986 pool_gc_pages(0) at pool_gc_pages+0x357 sys/kern/subr_pool.c:1587 taskq_thread(ffffffff83818100) at taskq_thread+0x157 sys/kern/kern_task.c:446 end trace frame: 0x0, count: -5