panic: kernel diagnostic assertion "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/multicore/kernel/sys/arch/amd64/amd64/intr.c", line 699 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 348021 49724 0 0x2 0 1 syz-executor.6 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a3044) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281f9a9,ffffffff827ac472,2bb,ffffffff827a3e5f) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(e1552b56) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f623d80) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f623d80) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002128ba90,fffffd806f623d80,fffffd806f623e08,8,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002128ba90,8) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002128ba90) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002128ba90,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002128ba90,ffff800029ee7b80,ffff800029ee7bd0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800029ee7c50) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800029ee7c50) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c024e3f07a0, count: 2 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 "nlevel >= IPL_NONE" failed: file "/syzkaller/managers/multicore/kernel/sys/arch/amd64/amd64/intr.c", line 699 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a3044) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281f9a9,ffffffff827ac472,2bb,ffffffff827a3e5f) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(e1552b56) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f623d80) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f623d80) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002128ba90,fffffd806f623d80,fffffd806f623e08,8,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002128ba90,8) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002128ba90) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002128ba90,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002128ba90,ffff800029ee7b80,ffff800029ee7bd0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800029ee7c50) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800029ee7c50) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c024e3f07a0, count: -13 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800029ee77c0 rbx 0xffffffff82bd0b9f cpu_info_full_primary+0x2b9f rdx 0 rcx 0xffff80002128ba90 rax 0xffffffff82bcfff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0x8080808080808080 r10 0x9ebdfe3dd8fc6936 r11 0x894fbdd9e2795daf r12 0xffffffff82bd09a0 cpu_info_full_primary+0x29a0 r13 0 r14 0 r15 0x1 rip 0xffffffff8272402c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800029ee77b0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.7) pid=185050 stat=onproc flags process=1008 proc=2000 pri=0, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff800021277000,0xffff80002128bd48 process=0xffff80002121fab0 user=0xffff800029ee2000, vmspace=0xfffffd8069cfd018 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 64655 481958 79946 0 2 0 syz-executor.4 86637 391150 0 0 3 0x14280 nfsidl nfsio 87984 331611 0 0 3 0x14280 nfsidl nfsio 10275 273207 0 0 3 0x14280 nfsidl nfsio 99917 118044 0 0 3 0x14280 nfsidl nfsio 49830 141166 0 0 3 0x14280 nfsidl nfsio 24013 277545 0 0 3 0x14280 nfsidl nfsio 34483 272574 0 0 3 0x14280 nfsidl nfsio 76893 99441 0 0 3 0x14280 nfsidl nfsio 79397 312542 0 0 3 0x14280 nfsidl nfsio 46005 466559 0 0 3 0x14280 nfsidl nfsio 94928 236074 0 0 3 0x14280 nfsidl nfsio 68159 516619 0 0 3 0x14280 nfsidl nfsio 86655 511337 0 0 3 0x14280 nfsidl nfsio 70815 485487 0 0 3 0x14280 nfsidl nfsio 7938 285245 0 0 3 0x14280 nfsidl nfsio 21981 442239 0 0 3 0x14280 nfsidl nfsio 63226 376198 0 0 3 0x14280 nfsidl nfsio 16868 142239 0 0 3 0x14280 nfsidl nfsio 85925 212888 0 0 3 0x14280 nfsidl nfsio 64160 338271 0 0 3 0x14280 nfsidl nfsio 96740 330294 1 0 3 0x100083 ttyin getty 79946 15776 78652 0 3 0x82 nanoslp syz-executor.4 49724 348021 78652 0 7 0x2 syz-executor.6 82347 447610 78652 0 2 0x2 syz-executor.0 45014 207696 78652 0 2 0x2 syz-executor.3 84998 479692 1 0 3 0x80 fsleep syz-executor.3 84998 58764 1 0 3 0x4000080 kqread syz-executor.3 31020 221654 1 0 3 0x80 fsleep syz-executor.3 31020 1385 1 0 3 0x4000080 netio syz-executor.3 13498 45048 78652 0 2 0x482 syz-executor.1 61028 264984 78652 0 2 0x2 syz-executor.2 17541 292340 0 0 3 0x14200 acct acct 97172 378221 0 0 3 0x14200 bored sosplice 23062 521110 78652 0 3 0x82 nanoslp syz-executor.7 98717 215301 78652 0 2 0x2 syz-executor.5 78652 499943 2720 0 3 0x2000082 wait syz-fuzzer 78652 166957 2720 0 2 0x6000482 syz-fuzzer 78652 332985 2720 0 3 0x6000082 wait syz-fuzzer 78652 281240 2720 0 3 0x6000082 thrsleep syz-fuzzer 78652 324543 2720 0 3 0x6000082 wait syz-fuzzer 78652 420488 2720 0 3 0x6000082 thrsleep syz-fuzzer 78652 500566 2720 0 3 0x6000082 wait syz-fuzzer 78652 221917 2720 0 3 0x6000082 wait syz-fuzzer 78652 202018 2720 0 3 0x6000082 thrsleep syz-fuzzer 78652 1937 2720 0 3 0x6000082 wait syz-fuzzer 78652 205201 2720 0 3 0x6000082 thrsleep syz-fuzzer 78652 455472 2720 0 3 0x6000082 thrsleep syz-fuzzer 78652 128123 2720 0 3 0x6000082 wait syz-fuzzer 78652 363523 2720 0 2 0x6000082 syz-fuzzer 78652 463298 2720 0 3 0x6000082 kqread syz-fuzzer 78652 390831 2720 0 3 0x6000082 wait syz-fuzzer 2720 65809 42150 0 3 0x10008a sigsusp ksh 42150 420348 99822 0 3 0x9a kqread sshd 99822 153898 1 0 3 0x88 kqread sshd 28419 351502 5720 74 3 0x1100092 bpf pflogd 5720 467679 1 0 3 0x80 netio pflogd 59695 66513 56689 73 3 0x1100090 kqread syslogd 56689 58773 1 0 3 0x100082 netio syslogd 67442 192052 1 0 3 0x100080 kqread resolvd 5248 454677 72643 77 3 0x100092 kqread dhcpleased 91873 448197 72643 77 3 0x100092 kqread dhcpleased 72643 132523 1 0 3 0x80 kqread dhcpleased 96755 70453 0 0 3 0x14200 bored smr 88834 136603 0 0 2 0x14200 zerothread 35497 294390 0 0 3 0x14200 aiodoned aiodoned 578 1291 0 0 3 0x14200 syncer update 5359 136085 0 0 3 0x14200 cleaner cleaner 28845 502771 0 0 2 0x14200 reaper 57263 476852 0 0 3 0x14200 pgdaemon pagedaemon 83745 314006 0 0 3 0x14200 bored viomb 6862 134119 0 0 3 0x40014200 acpi0 acpi0 28869 440335 0 0 3 0x40014200 idle1 61728 432292 0 0 3 0x14200 bored softnet3 37442 288280 0 0 3 0x14200 bored softnet2 1201 444230 0 0 3 0x14200 bored softnet1 96059 4229 0 0 3 0x14200 bored softnet0 76438 420849 0 0 3 0x14200 bored systqmp 1262 128128 0 0 3 0x14200 bored systq 80169 367996 0 0 2 0x40014200 softclock 52779 115777 0 0 3 0x40014200 idle0 1 432301 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 82347 (syz-executor.0) thread 0xffff800021276ab0 (447610) exclusive rrwlock inode r = 0 (0xfffffd806e1f8e68) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807def2c48) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10291 7009K 7739K 78643K 54536 0 pcb 13 12K 14K 78643K 763 0 rtable 255 7K 8K 78643K 875 0 pf 34 9K 10K 78643K 231 0 ifaddr 46 16K 17K 78643K 172 0 ifgroup 59 2K 2K 78643K 335 0 sysctl 2 0K 0K 78643K 2 0 counters 62 36K 36K 78643K 220 0 ioctlops 0 0K 4K 78643K 1920 0 iov 0 0K 16K 78643K 554 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1597 100K 100K 78643K 13106 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 110 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 2595 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 85K 78643K 11015 0 sigio 0 0K 0K 78643K 473 0 proc 70 91K 116K 78643K 1537 0 subproc 130 8K 8K 78643K 273 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 158 0 in_multi 99 7K 7K 78643K 291 0 ether_multi 1 0K 0K 78643K 8 0 mrt 1 0K 0K 78643K 10 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 301 1341K 1341K 78643K 301 0 exec 0 0K 1K 78643K 1929 0 pfkey data 0 0K 0K 78643K 36 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 444 115K 132K 78643K 110815 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 186 0 NDP 13 0K 2K 78643K 134 0 temp 82 5920K 6052K 78643K 109863 0 kqueue 13 20K 30K 78643K 1073 0 SYN cache 2 16K 24K 78643K 4 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 450 0 447 7 6 1 3 0 8 0 rtentry 112 277 0 158 4 0 4 4 0 8 0 unpcb 144 6607 0 6590 72 68 4 8 0 8 3 syncache 304 114 0 114 18 17 1 1 0 8 1 tcpqe 32 149 0 149 17 16 1 1 0 8 1 tcpcb 808 2470 0 2451 94 88 6 9 0 8 3 arp 120 47 0 28 1 0 1 1 0 8 0 inpcb 368 6419 0 6397 131 124 7 14 0 8 4 nd6 136 80 0 48 2 0 2 2 0 8 0 pkpcb 40 84 0 84 4 3 1 1 0 8 1 kcovpl 48 21 0 11 1 0 1 1 0 8 0 ppxss 1256 34 0 34 10 9 1 1 0 8 1 pffrag 232 62 0 61 2 1 1 1 0 482 0 pffrnode 88 60 0 59 2 1 1 1 0 8 0 pffrent 40 232 0 231 4 3 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 24 277 0 261 1 0 1 1 0 8 0 pfstkey 128 277 0 261 2 0 2 2 0 8 0 pfstate 376 277 0 261 8 6 2 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1099 0 619 33 3 30 32 0 8 0 art_table 32 1100 0 619 5 0 5 5 0 8 0 art_node 16 273 0 164 1 0 1 1 0 8 0 sysvmsgpl 40 59 0 45 1 0 1 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 2593 0 2583 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 15895 0 14405 94 0 94 94 0 8 0 ffsino 272 15895 0 14405 100 0 100 100 0 8 0 nchpl 144 32618 0 30964 64 0 64 64 0 8 0 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 112144 0 112143 3 2 1 2 0 8 0 percpumem 16 123 0 79 1 0 1 1 0 8 0 vmpool 696 233 0 233 14 14 0 1 0 8 0 kstatmem 264 184 0 158 2 0 2 2 0 8 0 scxspl 216 89650 0 89650 32 31 1 8 1 8 1 plimitpl 152 1046 0 1028 1 0 1 1 0 8 0 sigapl 424 11388 0 11321 13 4 9 9 0 8 0 futexpl 64 97688 0 97686 2 1 1 1 0 8 0 knotepl 120 1006 0 0 19 0 19 19 0 8 0 kqueuepl 216 3409 0 3399 38 37 1 8 0 8 0 pipepl 320 1855 0 1825 65 57 8 16 0 8 5 fdescpl 496 11289 0 11262 8 3 5 5 0 8 0 filepl 152 72427 0 72148 158 142 16 24 0 8 4 lockfpl 104 16940 0 16938 39 38 1 4 0 8 0 lockfspl 48 7837 0 7835 9 8 1 2 0 8 0 sessionpl 144 41 0 22 1 0 1 1 0 8 0 pgrppl 48 223 0 204 1 0 1 1 0 8 0 ucredpl 104 7991 0 7979 1 0 1 1 0 8 0 zombiepl 144 11323 0 11321 1 0 1 1 0 8 0 processpl 1072 11388 0 11321 5 0 5 5 0 8 0 procpl 680 31346 0 31261 21 11 10 10 0 8 1 srpgc 96 5 0 5 3 3 0 1 0 8 0 sosppl 168 128 0 125 10 9 1 1 0 8 0 sockpl 488 13573 0 13530 296 282 14 28 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 21 0 0 3 1 2 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 28 0 0 2 1 1 2 0 8 0 mcl8k 8192 33 0 0 4 1 3 3 0 8 0 mcl4k 4096 60 0 0 5 1 4 4 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 394 0 0 39 9 30 39 0 8 0 mtagpl 96 2348 0 0 49 0 49 49 0 8 0 mbufpl 256 3055 0 0 172 0 172 172 0 8 0 bufpl 288 21618 0 15289 453 0 453 453 0 8 0 anonpl 24 1072976 0 1058905 152 60 92 115 0 186 0 amapchunkpl 152 348159 0 347302 80 38 42 45 0 158 1 amappl16 200 19595 0 19214 48 25 23 35 0 8 0 amappl15 192 14 0 13 1 0 1 1 0 8 0 amappl14 184 211 0 194 2 1 1 2 0 8 0 amappl13 176 17 0 16 3 2 1 1 0 8 0 amappl12 168 12147 0 12117 3 1 2 2 0 8 0 amappl11 160 63 0 48 1 0 1 1 0 8 0 amappl10 152 56 0 42 1 0 1 1 0 8 0 amappl9 144 266 0 266 15 14 1 1 0 8 1 amappl8 136 669 0 497 7 0 7 7 0 8 0 amappl7 128 97 0 84 2 0 2 2 0 8 0 amappl6 120 427 0 398 2 1 1 2 0 8 0 amappl5 112 387 0 375 1 0 1 1 0 8 0 amappl4 104 860 0 805 3 1 2 3 0 8 0 amappl3 96 68628 0 68557 6 3 3 4 0 8 0 amappl2 88 11997 0 11918 3 1 2 3 0 8 0 amappl1 80 48605 0 48057 23 10 13 23 0 8 0 amappl 88 109813 0 109574 13 6 7 8 0 92 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 11522 0 11495 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11522 0 11495 1 0 1 1 0 8 0 vmmpekpl 168 84426 0 84354 4 0 4 4 0 8 0 vmmpepl 168 670924 0 668569 335 217 118 139 0 357 0 vmsppl 464 11521 0 11495 8 3 5 5 0 8 0 rwobjpl 56 166408 0 158743 118 8 110 113 0 8 0 pdppl 4096 23052 0 22990 744 670 74 80 0 8 12 pvpl 32 2970077 0 2950227 451 276 175 367 0 265 0 pmappl 248 11521 0 11495 6 3 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1916 0 921 29 0 29 29 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827a3044) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8281f9a9,ffffffff827ac472,2bb,ffffffff827a3e5f) at __assert+0x29 sys/kern/subr_prf.c:157 splraise(e1552b56) at splraise+0xb4 sys/arch/amd64/amd64/intr.c:699 mtx_enter_try(fffffd806f623d80) at mtx_enter_try+0x73 sys/kern/kern_lock.c:291 mtx_enter(fffffd806f623d80) at mtx_enter+0x4f sys/kern/kern_lock.c:266 knote_remove(ffff80002128ba90,fffffd806f623d80,fffffd806f623e08,8,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002128ba90,8) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002128ba90) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002128ba90,0,0,1) at exit1+0x3e4 sys/kern/kern_exit.c:206 sys_exit(ffff80002128ba90,ffff800029ee7b80,ffff800029ee7bd0) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800029ee7c50) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800029ee7c50) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c024e3f07a0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82c55160) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c55160) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff800027ba5290) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027ba5290) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x749e56bd9310, count: 9 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82c55160) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82c55160) at __mp_lock+0x122 sys/kern/kern_lock.c:147 syscall(ffff800027ba5290) at syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027ba5290) at syscall+0x5cd sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x749e56bd9310, count: -6