panic: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a7e8b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833ea62c,ffffffff83409088,1cb,ffffffff833a6086) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff80003c41d2b0) at pipex_unlink_session_locked+0x409 pipex_destroy_all_sessions(ffff800001495000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff800001495000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,41,2000,ffff8000fffeefa8) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003b802230) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8067a04bd0,41,fffffd80097fd5b0,ffff8000fffeefa8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806815bd78,ffff8000fffeefa8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806815bd78,ffff8000fffeefa8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806815bd78,ffff8000fffeefa8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806815bd78,ffff8000fffeefa8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeefa8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeefa8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeefa8,ffff80003b8025a0,ffff80003b8024f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80003b802590, count: 0 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: kernel diagnostic assertion "rn != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/pipex.c", line 459 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833a7e8b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833ea62c,ffffffff83409088,1cb,ffffffff833a6086) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff80003c41d2b0) at pipex_unlink_session_locked+0x409 pipex_destroy_all_sessions(ffff800001495000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff800001495000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,41,2000,ffff8000fffeefa8) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003b802230) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8067a04bd0,41,fffffd80097fd5b0,ffff8000fffeefa8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806815bd78,ffff8000fffeefa8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806815bd78,ffff8000fffeefa8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806815bd78,ffff8000fffeefa8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806815bd78,ffff8000fffeefa8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeefa8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeefa8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeefa8,ffff80003b8025a0,ffff80003b8024f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003b8025a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b8025a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72780848e5f0, count: -16 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003b802000 rbx 0xffffffff83808e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff8000fffeefa8 rax 0xffffffff83807ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6621cc674117e8dd r11 0xd0ee938951d878bc r12 0xffffffff83808c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff815a5925 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003b801ff0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=186833 pid=59805 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffeefa8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff800030fda7e8,0xffff8000fffeed20 process=0xffff8000fffe84e8 user=0xffff80003b7fd000, vmspace=0xfffffd80698e17b8 estcpu=33, cpticks=8, pctcpu=0.6, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 86988 295306 77641 0 2 0 syz-executor 86988 74523 77641 0 3 0x4000080 fsleep syz-executor 77827 27778 94352 0 3 0x80 nanoslp syz-executor 77827 174634 94352 0 3 0x4000080 ttyretype syz-executor 22649 414210 70280 0 3 0x80 nanoslp syz-executor 22649 282576 70280 0 3 0x4000080 nanoslp syz-executor 1078 167140 17299 0 3 0x80 nanoslp syz-executor 1078 38911 17299 0 3 0x4000080 lockf syz-executor 1078 10056 17299 0 3 0x4000080 fsleep syz-executor 66063 98872 70368 0 3 0x2 biowait syz-executor 94352 219030 70368 0 3 0x82 nanoslp syz-executor 88920 503692 70368 0 3 0x82 nanoslp syz-executor 9017 307587 70368 0 3 0x82 wait syz-executor 77641 397374 70368 0 3 0x82 nanoslp syz-executor 17299 274367 70368 0 3 0x82 nanoslp syz-executor 6603 214293 70368 0 3 0x2 biowait syz-executor 70280 226132 70368 0 3 0x82 nanoslp syz-executor 70368 420902 83644 0 3 0x82 nanoslp syz-executor 83644 480082 5296 0 3 0x10008a sigsusp ksh 5296 144127 69744 0 3 0x98 kqread sshd-session 69744 35281 53058 0 3 0x92 kqread sshd-session 35568 74622 1 0 3 0x100083 ttyopn getty 53058 512430 1 0 3 0x88 kqread sshd 19817 321361 87797 74 3 0x1100092 bpf pflogd 87797 229428 1 0 3 0x80 sbwait pflogd 16668 431989 86267 73 3 0x1100090 kqread syslogd 86267 189342 1 0 3 0x100082 sbwait syslogd 85421 110447 1 0 3 0x100080 kqread resolvd 82557 422338 66722 77 2 0x100012 dhcpleased 72570 243251 66722 77 3 0x100092 kqread dhcpleased 66722 313779 1 0 3 0x80 kqread dhcpleased 62905 29505 0 0 3 0x14200 bored smr 54647 132060 0 0 2 0x14200 zerothread 18192 181081 0 0 3 0x14200 aiodoned aiodoned 78223 512162 0 0 3 0x14200 syncer update 31815 32573 0 0 3 0x14200 cleaner cleaner 3857 16381 0 0 3 0x14200 reaper reaper 2725 458092 0 0 3 0x14200 pgdaemon pagedaemon 48242 189697 0 0 3 0x14200 bored viomb 56563 209308 0 0 3 0x40014200 acpi0 acpi0 31130 277429 0 0 7 0x40014200 idle1 21905 61629 0 0 3 0x14200 bored softnet1 81819 159881 0 0 2 0x14200 softnet0 97687 445649 0 0 3 0x14200 bored systqmp 61255 221556 0 0 3 0x14200 bored systq 48671 50149 0 0 3 0x14200 tmoslp softclockmp 57671 146232 0 0 3 0x40014200 tmoslp softclock 34574 372635 0 0 3 0x40014200 idle0 1 386163 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex /syzkaller/managers/multicore/kernel/sys/net/pipex.c:78 r = 0 (0xffffffff838a64f0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 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 pipex_destroy_all_sessions+0x2f sys/net/pipex.c:144 #4 pppacclose+0x16f sys/net/if_pppx.c:1335 #5 spec_close+0x417 sys/kern/spec_vnops.c:-1 #6 VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 #7 vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] #7 vn_closefile+0x12b sys/kern/vfs_vnops.c:615 #8 fdrop+0x121 sys/kern/kern_descrip.c:1280 #9 closef+0x192 sys/kern/kern_descrip.c:1264 #10 fdfree+0x116 sys/kern/kern_descrip.c:1195 #11 exit1+0x576 sys/kern/kern_exit.c:215 #12 sys_exit+0x1a sys/kern/kern_exit.c:-1 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #14 Xsyscall+0x128 Process 66063 (syz-executor) thread 0xffff8000fffeea78 (98872) Process 6603 (syz-executor) thread 0xffff8000ffffc2a0 (214293) Process 81819 (softnet0) thread 0xffff8000ffffe530 (159881) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10211 11103K 11433K 166960K 12570 0 pcb 17 15K 16K 166960K 286 0 rtable 244 8K 8K 166960K 428 0 pf 37 18K 21K 166960K 90 0 ifaddr 47 8K 8K 166960K 71 0 ifgroup 55 2K 2K 166960K 103 0 sysctl 4 1K 9K 166960K 11 0 counters 70 37K 37K 166960K 116 0 ioctlops 0 0K 4K 166960K 1593 0 iov 0 0K 16K 166960K 68 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1398 88K 89K 166960K 2035 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 48 8K 11K 166960K 351 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 665 0 sigio 0 0K 0K 166960K 18 0 proc 72 115K 147K 166960K 573 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 95 0 in_multi 103 7K 7K 166960K 131 0 ether_multi 1 0K 0K 166960K 9 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 423 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 249 168K 182K 166960K 8026 0 UVM aobj 14 2K 2K 166960K 15 0 pinsyscall 41 82K 106K 166960K 1797 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 48 0 NDP 12 0K 2K 166960K 44 0 temp 75 8676K 8762K 166960K 72776 0 kqueue 16 22K 32K 166960K 120 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 81 0 78 1 0 1 1 0 8 0 rtentry 176 136 0 26 6 0 6 6 0 8 0 unpcb 144 483 0 464 7 3 4 4 0 8 3 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpcb 736 228 0 224 7 3 4 4 0 8 3 arp 136 23 0 2 1 0 1 1 0 8 0 inpcb 328 748 0 740 9 2 7 7 0 8 6 nd6 152 25 0 0 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 18 0 17 3 2 1 1 0 8 0 pppxif 1504 4 0 4 2 2 0 1 0 8 0 pfstscr 40 2 0 1 1 0 1 1 0 8 0 pffrag 232 7 0 0 1 0 1 1 0 482 0 pffrnode 88 6 0 0 1 0 1 1 0 8 0 pffrent 40 8 0 1 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 pfstitem 24 50 0 20 1 0 1 1 0 8 0 pfstkey 128 52 0 22 2 0 2 2 0 8 0 pfstate 448 50 0 21 4 0 4 4 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 554 0 82 32 2 30 31 0 8 0 art_table 40 555 0 82 5 0 5 5 0 8 0 art_node 32 135 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 4 2 2 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 131 0 102 5 0 5 5 0 8 0 dino2pl 256 2710 0 1205 96 0 96 96 0 8 0 ffsino 296 2710 0 1205 118 0 118 118 0 8 0 nchpl 144 3676 0 1979 64 0 64 64 0 8 0 rtmask 32 3 0 2 2 1 1 1 0 8 0 vnodes 216 3150 0 0 175 0 175 175 0 8 0 namei 1024 12664 0 12663 2 1 1 1 0 8 0 percpumem 16 73 0 23 1 0 1 1 0 8 0 kstatmem 264 56 0 30 4 1 3 3 0 8 1 scsiplug 72 8 0 8 3 2 1 1 0 8 1 scxspl 216 29501 0 29499 10 2 8 8 1 8 7 plimitpl 152 117 0 99 1 0 1 1 0 8 0 sigapl 424 976 0 930 7 1 6 7 0 8 0 knotepl 120 769 0 0 23 0 23 23 0 8 0 kqueuepl 224 273 0 263 5 3 2 3 0 8 1 pipepl 344 235 0 208 3 0 3 3 0 8 0 fdescpl 528 959 0 929 3 0 3 3 0 8 0 filepl 160 6497 0 6275 19 6 13 17 0 8 2 lockfpl 104 336 0 332 2 1 1 2 0 8 0 lockfspl 48 93 0 90 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 43 0 26 1 0 1 1 0 8 0 ucredpl 104 1087 0 1074 1 0 1 1 0 8 0 zombiepl 144 932 0 930 1 0 1 1 0 8 0 processpl 1232 976 0 930 5 1 4 5 0 8 0 procpl 664 1816 0 1765 6 0 6 6 0 8 0 sosppl 176 5 0 5 2 1 1 1 0 8 1 sockpl 752 1326 0 1296 20 9 11 11 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 42 0 0 6 0 6 6 0 8 0 mtagpl 96 122 0 0 3 0 3 3 0 8 0 mbufpl 256 1277 0 0 80 0 80 80 0 8 0 bufpl 280 12813 0 6676 439 0 439 439 0 8 0 anonpl 32 19550 0 0 158 0 158 158 0 246 0 amapchunkpl 152 25627 0 25031 39 9 30 33 0 158 3 amappl16 200 5536 0 5048 56 7 49 49 0 8 1 amappl15 192 42 0 42 1 1 0 1 0 8 0 amappl14 184 5 0 4 1 0 1 1 0 8 0 amappl13 176 424 0 423 1 0 1 1 0 8 0 amappl12 168 1321 0 1280 3 1 2 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 257 0 256 1 0 1 1 0 8 0 amappl8 136 27 0 23 1 0 1 1 0 8 0 amappl7 128 81 0 79 1 0 1 1 0 8 0 amappl6 120 280 0 267 1 0 1 1 0 8 0 amappl5 112 73 0 63 1 0 1 1 0 8 0 amappl4 104 435 0 404 1 0 1 1 0 8 0 amappl3 96 4411 0 4319 4 1 3 3 0 8 0 amappl2 88 1084 0 1007 2 0 2 2 0 8 0 amappl1 80 11403 0 10813 16 3 13 15 0 8 0 amappl 88 7220 0 7049 6 1 5 5 0 92 0 uvmvnodes 80 114 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 7 0 7 2 2 0 1 0 8 0 dma128 128 255 0 255 3 3 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 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 960 0 930 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 960 0 930 1 0 1 1 0 8 0 vmmpekpl 168 9301 0 9258 3 0 3 3 0 8 0 vmmpepl 168 69279 0 66937 129 4 125 125 0 357 0 vmsppl 488 959 0 930 6 2 4 5 0 8 0 rwobjpl 80 22807 0 21285 42 2 40 40 0 8 0 pdppl 4096 1927 0 1860 103 32 71 85 0 8 4 pvpl 32 28177 0 0 228 0 228 228 0 265 0 pmappl 256 959 0 930 4 2 2 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 364 0 45 10 0 10 10 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(ffffffff833a7e8b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833ea62c,ffffffff83409088,1cb,ffffffff833a6086) at __assert+0x29 sys/kern/subr_prf.c:-1 pipex_unlink_session_locked(ffff80003c41d2b0) at pipex_unlink_session_locked+0x409 pipex_destroy_all_sessions(ffff800001495000) at pipex_destroy_all_sessions+0xd9 pipex_rele_session sys/net/pipex.c:-1 [inline] pipex_destroy_all_sessions(ffff800001495000) at pipex_destroy_all_sessions+0xd9 sys/net/pipex.c:151 pppacclose(637e,41,2000,ffff8000fffeefa8) at pppacclose+0x16f sys/net/if_pppx.c:1335 spec_close(ffff80003b802230) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8067a04bd0,41,fffffd80097fd5b0,ffff8000fffeefa8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806815bd78,ffff8000fffeefa8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806815bd78,ffff8000fffeefa8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806815bd78,ffff8000fffeefa8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806815bd78,ffff8000fffeefa8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000fffeefa8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000fffeefa8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000fffeefa8,ffff80003b8025a0,ffff80003b8024f0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003b8025a0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b8025a0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72780848e5f0, count: -16 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299edff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5