panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 316 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *321655 69285 0 0x2 0 0K ifconfig 484848 14281 0 0x2 0 1 ifconfig db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336f555) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833b0ea0,ffffffff833fcd7d,13c,ffffffff832f06b0) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff80000147a800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a3bf080) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff800010fd5790,80206979,ffff80002a3bf080,ffff80003a020d28) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003a020d28,ffff80002a3bf260,ffff80002a3bf1b0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a3bf260) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bf260) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x718841ceaf90, count: 6 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 "sc->sc_dev == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/net/if_tun.c", line 316 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336f555) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833b0ea0,ffffffff833fcd7d,13c,ffffffff832f06b0) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff80000147a800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a3bf080) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff800010fd5790,80206979,ffff80002a3bf080,ffff80003a020d28) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003a020d28,ffff80002a3bf260,ffff80002a3bf1b0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a3bf260) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bf260) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x718841ceaf90, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a3bee30 rbx 0xffffffff83840ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff80003a020d28 rax 0xffffffff8383fff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xfdb6e47ded0b3423 r11 0xf241348630c91a2c r12 0xffffffff83840be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff8187e2e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a3bee20 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (ifconfig) tid=321655 pid=69285 tcnt=1 stat=onproc flags process=2 proc=0 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a0202c8,0xffffffff8398eae8 process=0xffff80003a0279e0 user=0xffff80002a3ba000, vmspace=0xfffffd800b027d58 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *69285 321655 12311 0 7 0x2 ifconfig 14281 484848 32791 0 7 0x2 ifconfig 32791 346875 51199 0 3 0x10008a sigsusp sh 12311 440571 42631 0 3 0x10008a sigsusp sh 42631 130531 57291 0 3 0x82 wait syz-executor 65766 444851 28877 0 2 0xc80 syz-executor 65766 129590 28877 0 3 0x4000080 netacc syz-executor 65766 196995 28877 0 3 0x4000080 fsleep syz-executor 34893 78618 57291 0 2 0x2 syz-executor 51199 449049 57291 0 3 0x82 wait syz-executor 24516 32685 57291 0 3 0x82 piperd syz-executor 4814 363855 57291 0 3 0x82 piperd syz-executor 28877 502715 57291 0 2 0xc82 syz-executor 86477 195593 1 0 3 0x100083 ttyin getty 52873 32939 0 0 3 0x14200 acct acct 85125 113609 0 0 3 0x14200 bored sosplice 57291 37807 97075 0 3 0x82 nanoslp syz-executor 97075 408422 12532 0 3 0x10008a sigsusp ksh 12532 397034 29954 0 3 0x98 kqread sshd-session 29954 328493 51159 0 3 0x92 kqread sshd-session 51159 68700 1 0 3 0x88 kqread sshd 69343 456003 6066 74 3 0x1100092 bpf pflogd 6066 18486 1 0 3 0x80 sbwait pflogd 5368 79342 69788 73 3 0x1100090 kqread syslogd 69788 509592 1 0 3 0x100082 sbwait syslogd 23310 506673 1 0 3 0x100080 kqread resolvd 34908 24584 53888 77 2 0x100092 dhcpleased 56293 482772 53888 77 3 0x100092 kqread dhcpleased 53888 32336 1 0 3 0x80 kqread dhcpleased 42551 489385 0 0 2 0x14200 smr 6659 516266 0 0 2 0x14200 zerothread 92889 293176 0 0 3 0x14200 aiodoned aiodoned 40364 81897 0 0 3 0x14200 syncer update 52480 150239 0 0 3 0x14200 cleaner cleaner 63436 274469 0 0 3 0x14200 reaper reaper 67485 264280 0 0 3 0x14200 pgdaemon pagedaemon 23662 29139 0 0 3 0x14200 bored viomb 89859 78356 0 0 3 0x40014200 acpi0 acpi0 21756 438259 0 0 3 0x40014200 idle1 41596 42387 0 0 3 0x14200 bored softnet7 73142 10306 0 0 3 0x14200 bored softnet6 24361 44753 0 0 3 0x14200 bored softnet5 93450 300126 0 0 3 0x14200 bored softnet4 13563 153368 0 0 3 0x14200 bored softnet3 45260 285720 0 0 3 0x14200 bored softnet2 52343 131394 0 0 3 0x14200 bored softnet1 41312 84010 0 0 3 0x14200 bored softnet0 23993 212030 0 0 3 0x14200 smrbar systqmp 55381 17429 0 0 3 0x14200 bored systq 77025 42283 0 0 3 0x14200 tmoslp softclockmp 47005 378624 0 0 3 0x40014200 tmoslp softclock 90724 334361 0 0 3 0x40014200 idle0 1 429583 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 69285 (ifconfig) thread 0xffff80003a020d28 (321655) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839c65f0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe3 sys/kern/kern_malloc.c:174 #3 counters_read+0x1f2 sys/kern/subr_percpu.c:174 #4 if_getdata+0x16f sys/net/if.c:2832 #5 rtm_ifchg+0xfb sys/net/rtsock.c:1794 #6 if_down+0x1cb if_linkstate sys/net/if.c:1798 [inline] #6 if_down+0x1cb sys/net/if.c:1745 #7 if_clone_destroy+0x1a3 sys/net/if.c:1386 #8 ifioctl+0x59d sys/net/if.c:2066 #9 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #11 Xsyscall+0x128 exclusive rwlock clonelk r = 0 (0xffffffff83791098) #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 if_clone_destroy+0x67 sys/net/if.c:-1 #3 ifioctl+0x59d sys/net/if.c:2066 #4 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 #6 Xsyscall+0x128 Process 34893 (syz-executor) thread 0xffff80002a2b9ca0 (78618) exclusive rrwlock inode r = 0 (0xfffffd806da40d78) #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:746 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8070b4b6b0) #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:746 #9 Xsyscall+0x128 Process 23993 (systqmp) thread 0xffff8000ffffe530 (212030) shared rwlock systqmp r = 0 (0xffffffff83823378) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 11035K 12362K 166960K 12244 0 pcb 18 14K 16K 166960K 455 0 rtable 151 8K 10K 166960K 553 0 pf 35 18K 81K 166960K 196 0 ifaddr 31 5K 7K 166960K 124 0 ifgroup 47 2K 2K 166960K 190 0 sysctl 4 1K 9K 166960K 18 0 counters 64 36K 37K 166960K 210 0 ioctlops 0 0K 4K 166960K 1766 0 iov 0 0K 20K 166960K 50 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1431 90K 90K 166960K 2395 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 105 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 13 45K 110K 166960K 1336 0 sigio 0 0K 0K 166960K 23 0 proc 86 148K 180K 166960K 876 0 subproc 54 3K 5K 166960K 245 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 142 0 in_multi 62 4K 7K 166960K 213 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 630 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 191 153K 186K 166960K 13333 0 UVM aobj 30 2K 2K 166960K 30 0 pinsyscall 38 76K 101K 166960K 2715 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 206 0 NDP 15 0K 1K 166960K 90 0 temp 69 8651K 8908K 166960K 52375 0 kqueue 13 20K 31K 166960K 241 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 120 113 0 110 1 0 1 1 0 8 0 rtentry 176 193 0 137 5 0 5 5 0 8 1 unpcb 144 1035 0 1017 7 6 1 4 0 8 0 syncache 336 26 0 26 2 2 0 1 0 8 0 tcpqe 32 2 0 2 2 2 0 1 0 8 0 tcpcb 736 453 0 445 13 9 4 7 0 8 3 arp 128 23 0 15 1 0 1 1 0 8 0 inpcb 328 1583 0 1569 15 11 4 7 0 8 2 nd6 144 43 0 34 1 0 1 1 0 8 0 pkpcb 40 11 0 11 3 3 0 1 0 8 0 kcovpl 48 27 0 21 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 54 0 54 2 1 1 1 0 8 1 pppxif 1504 3 0 3 3 3 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 5 0 1 1 0 1 1 0 482 0 pffrnode 88 5 0 1 1 0 1 1 0 8 0 pffrent 40 7 0 3 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 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 89 0 40 1 0 1 1 0 8 0 pfstkey 128 94 0 47 2 0 2 2 0 8 0 pfstate 384 89 0 43 6 0 6 6 0 8 0 pfrule 1344 31 0 26 2 1 1 2 0 8 0 rttmr 136 3 0 3 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 980 0 722 32 6 26 30 0 8 8 art_table 40 982 0 722 5 0 5 5 0 8 1 art_node 32 191 0 141 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 100 0 90 1 0 1 1 0 8 0 shmpl 112 27 0 0 1 0 1 1 0 8 0 dirhash 1024 34 0 17 3 0 3 3 0 8 0 dino2pl 256 3770 0 2239 96 0 96 96 0 8 0 ffsino 296 3770 0 2239 118 0 118 118 0 8 0 nchpl 144 5455 0 3746 64 0 64 64 0 8 0 rtmask 32 11 0 11 3 3 0 1 0 8 0 uvmvnodes 80 4366 0 0 90 0 90 90 0 8 0 vnodes 216 4366 0 0 243 0 243 243 0 8 0 namei 1024 20324 0 20323 2 1 1 1 0 8 0 percpumem 16 120 0 73 1 0 1 1 0 8 0 kstatmem 264 122 0 100 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 11 0 11 2 2 0 1 0 8 0 scxspl 216 28816 0 28816 11 10 1 8 1 8 1 plimitpl 152 526 0 510 1 0 1 1 0 8 0 sigapl 424 1641 0 1589 9 1 8 9 0 8 0 knotepl 120 569 0 0 18 0 18 18 0 8 0 kqueuepl 224 468 0 459 4 3 1 3 0 8 0 pipepl 344 361 0 334 10 4 6 9 0 8 2 fdescpl 528 1596 0 1569 3 0 3 3 0 8 0 filepl 160 10438 0 10247 22 7 15 18 0 8 5 lockfpl 104 439 0 437 1 0 1 1 0 8 0 lockfspl 48 153 0 151 1 0 1 1 0 8 0 sessionpl 144 66 0 57 1 0 1 1 0 8 0 pgrppl 48 102 0 86 1 0 1 1 0 8 0 ucredpl 104 1502 0 1488 1 0 1 1 0 8 0 zombiepl 144 2022 0 2021 2 1 1 1 0 8 0 processpl 1232 1641 0 1589 7 2 5 7 0 8 0 procpl 664 3519 0 3465 8 0 8 8 0 8 1 sosppl 168 3 0 3 2 2 0 1 0 8 0 sockpl 752 2771 0 2735 23 15 8 11 0 8 4 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 247 0 0 15 0 15 15 0 8 0 bufpl 280 11163 0 5020 440 0 440 440 0 8 0 anonpl 32 11937 0 0 97 0 97 97 0 246 0 amapchunkpl 152 43418 0 43027 43 17 26 34 0 158 5 amappl16 200 3909 0 3874 38 21 17 26 0 8 8 amappl15 192 6 0 6 2 2 0 1 0 8 0 amappl14 184 170 0 158 1 0 1 1 0 8 0 amappl13 176 45 0 45 2 2 0 1 0 8 0 amappl12 168 2382 0 2354 3 1 2 2 0 8 0 amappl11 160 49 0 34 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 1 0 1 0 8 0 amappl9 144 260 0 260 2 2 0 1 0 8 0 amappl8 136 21 0 18 1 0 1 1 0 8 0 amappl7 128 146 0 133 1 0 1 1 0 8 0 amappl6 120 268 0 261 2 1 1 1 0 8 0 amappl5 112 186 0 173 1 0 1 1 0 8 0 amappl4 104 392 0 372 1 0 1 1 0 8 0 amappl3 96 7782 0 7717 4 1 3 3 0 8 0 amappl2 88 2006 0 1932 2 0 2 2 0 8 0 amappl1 80 19200 0 18614 16 1 15 15 0 8 0 amappl 88 12219 0 12102 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 255 0 255 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 29 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1596 0 1569 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1596 0 1569 1 0 1 1 0 8 0 vmmpekpl 168 17090 0 17041 4 0 4 4 0 8 1 vmmpepl 168 112535 0 110848 116 12 104 110 0 357 8 vmsppl 488 1595 0 1569 5 0 5 5 0 8 1 rwobjpl 80 36667 0 31375 112 0 112 112 0 8 0 pdppl 4096 3199 0 3138 125 56 69 83 0 8 8 pvpl 32 19060 0 0 154 0 154 154 0 265 0 pmappl 256 1595 0 1569 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 320 0 77 8 0 8 8 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(ffffffff8336f555) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833b0ea0,ffffffff833fcd7d,13c,ffffffff832f06b0) at __assert+0x29 sys/kern/subr_prf.c:-1 tun_clone_destroy(ffff80000147a800) at tun_clone_destroy+0x38a if_clone_destroy(ffff80002a3bf080) at if_clone_destroy+0x1d5 sys/net/if.c:1389 ifioctl(ffff800010fd5790,80206979,ffff80002a3bf080,ffff80003a020d28) at ifioctl+0x59d sys/net/if.c:2066 sys_ioctl(ffff80003a020d28,ffff80002a3bf260,ffff80002a3bf1b0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a3bf260) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3bf260) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x718841ceaf90, count: -9 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 __mp_lock(ffffffff839c63e8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839c63e8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 dofstatat(ffff80003a0202c8,ffffff9c,96fae9f05d4,7e5c627e2de0,0) at dofstatat+0xe1 sys/kern/vfs_syscalls.c:2086 syscall(ffff80003a43bb00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a43bb00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e5c627e2ea0, count: 8 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 __mp_lock(ffffffff839c63e8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff839c63e8) at __mp_lock+0x192 sys/kern/kern_lock.c:165 dofstatat(ffff80003a0202c8,ffffff9c,96fae9f05d4,7e5c627e2de0,0) at dofstatat+0xe1 sys/kern/vfs_syscalls.c:2086 syscall(ffff80003a43bb00) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003a43bb00) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7e5c627e2ea0, count: -7