panic: vop_generic_bWARNING: SPL NOT LOWERED ON SYSCALL 3 249 EXIT 0 9 Stopped at savectx+0xae: movl $0,%gs:0x658 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 9993 87354 32767 0x10 0 1 syz-executor.5 481530 10421 32767 0x10 0 0 syz-executor.4 savectx() at savectx+0xae end of kernel end trace frame: 0x74d69ea6f5f0, count: 14 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 *cpu0: vop_generic_badop ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x74d69ea6f5f0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a2448b0 rbx 0 rdx 0 rcx 0xffff80002bcadd50 rax 0x33 r8 0xffff80002a2447e0 r9 0x1 r10 0x7c7a1fc96bf6d963 r11 0x2b03fd71672cce88 r12 0 r13 0 r14 0xffff80002bcadd50 r15 0 rip 0xffffffff81b573fe savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a244830 ss 0x10 savectx+0xae: movl $0,%gs:0x658 ddb{1}> show proc PROC (syz-executor.5) tid=9993 pid=87354 tcnt=1 stat=onproc flags process=10 proc=0 runpri=58, usrpri=58, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002bcaed40,0xffff80002a248550 process=0xffff8000fffec020 user=0xffff80002a23f000, vmspace=0xfffffd806ba4de10 estcpu=36, cpticks=1, pctcpu=0.1, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 48787 82502 74615 32767 3 0x90 nanoslp syz-executor.6 48787 435396 74615 32767 3 0x4000090 kqread syz-executor.6 48787 210289 74615 32767 3 0x4000090 fsleep syz-executor.6 *87354 9993 88003 32767 7 0x10 syz-executor.5 88003 213149 16876 0 3 0x82 wait syz-executor.5 74615 102549 53478 32767 3 0x90 nanoslp syz-executor.6 53478 431862 16876 0 3 0x82 wait syz-executor.6 10421 481530 5510 32767 7 0x10 syz-executor.4 5510 68930 16876 0 3 0x82 wait syz-executor.4 78171 96325 43666 32767 3 0x90 nanoslp syz-executor.2 43666 187337 16876 0 3 0x82 wait syz-executor.2 28092 100543 76190 32767 2 0x10 syz-executor.0 76190 283527 16876 0 3 0x82 wait syz-executor.0 22962 78311 90371 32767 2 0x10 syz-executor.3 90371 492264 16876 0 3 0x82 wait syz-executor.3 12937 481181 40124 32767 3 0x90 nanoslp syz-executor.1 40124 338867 16876 0 3 0x82 wait syz-executor.1 21083 160088 0 0 3 0x14200 bored sosplice 16876 28796 43001 0 2 0x2000002 syz-fuzzer 16876 510730 43001 0 3 0x6000082 nanoslp syz-fuzzer 16876 473119 43001 0 3 0x6000082 thrsleep syz-fuzzer 16876 322148 43001 0 3 0x6000082 thrsleep syz-fuzzer 16876 326789 43001 0 3 0x6000082 wait syz-fuzzer 16876 386832 43001 0 3 0x6000082 wait syz-fuzzer 16876 207119 43001 0 3 0x6000082 wait syz-fuzzer 16876 504585 43001 0 3 0x6000082 wait syz-fuzzer 16876 118662 43001 0 3 0x6000082 thrsleep syz-fuzzer 16876 209389 43001 0 3 0x6000082 thrsleep syz-fuzzer 16876 98135 43001 0 3 0x6000082 thrsleep syz-fuzzer 16876 523459 43001 0 3 0x6000082 thrsleep syz-fuzzer 16876 195468 43001 0 3 0x6000082 wait syz-fuzzer 16876 411268 43001 0 3 0x6000082 wait syz-fuzzer 16876 215837 43001 0 3 0x6000082 thrsleep syz-fuzzer 16876 24164 43001 0 3 0x6000082 wait syz-fuzzer 43001 422226 48095 0 3 0x10008a sigsusp ksh 48095 453677 73606 0 3 0x9a kqread sshd 95854 330105 1 0 3 0x100083 ttyin getty 73606 160436 1 0 3 0x88 kqread sshd 63925 145792 75182 73 3 0x1100090 kqread syslogd 75182 248474 1 0 3 0x100082 netio syslogd 15144 421 1 0 3 0x100080 kqread resolvd 16477 470279 74284 77 3 0x100092 kqread dhcpleased 54649 71989 74284 77 3 0x100092 kqread dhcpleased 74284 1476 1 0 3 0x80 kqread dhcpleased 87025 348570 0 0 3 0x14200 bored smr 73282 57024 0 0 3 0x14200 pgzero zerothread 83672 161538 0 0 3 0x14200 aiodoned aiodoned 39947 416716 0 0 3 0x14200 syncer update 47912 11235 0 0 3 0x14200 cleaner cleaner 45340 252690 0 0 3 0x14200 reaper reaper 49021 502385 0 0 3 0x14200 pgdaemon pagedaemon 17563 2577 0 0 3 0x14200 bored viomb 4005 13141 0 0 3 0x40014200 acpi0 acpi0 96490 473930 0 0 3 0x40014200 idle1 27057 339123 0 0 3 0x14200 bored softnet3 50715 520072 0 0 3 0x14200 bored softnet2 62610 371780 0 0 3 0x14200 bored softnet1 55852 384261 0 0 3 0x14200 bored softnet0 50204 424160 0 0 3 0x14200 bored systqmp 36777 429531 0 0 3 0x14200 bored systq 4323 365894 0 0 3 0x14200 tmoslp softclockmp 23280 448879 0 0 3 0x40014200 tmoslp softclock 6801 280987 0 0 3 0x40014200 idle0 1 103849 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &newfdp->fd_fd.fd_fplock r = 0 (0xfffffd807061a660) #0 witness_lock+0x447 #1 mtx_enter_try+0x104 #2 mtx_enter+0x4f sys/kern/kern_lock.c:266 #3 fd_getfile_mode+0x6a fd_getfile sys/kern/kern_descrip.c:236 [inline] #3 fd_getfile_mode+0x6a sys/kern/kern_descrip.c:251 #4 dofilereadv+0x79 sys/kern/sys_generic.c:215 #5 sys_read+0x87 sys/kern/sys_generic.c:167 #6 syscall+0x5ae mi_syscall sys/sys/syscall_mi.h:183 [inline] #6 syscall+0x5ae sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 10421 (syz-executor.4) thread 0xffff80002bcaea98 (481530) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82e23500) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x46f sys/kern/sched_bsd.c:470 #3 sleep_finish+0x19b sys/kern/kern_synch.c:414 #4 biowait+0x91 sys/kern/vfs_bio.c:1254 #5 bwrite+0x21c sys/kern/vfs_bio.c:766 #6 ffs_update+0x28b sys/ufs/ffs/ffs_inode.c:111 #7 ufs_mkdir+0x517 sys/ufs/ufs/ufs_vnops.c:1175 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3069 #10 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #10 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80691d9920) #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 vget+0x200 sys/kern/vfs_subr.c:676 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1201 #8 ffs_inode_alloc+0x1c5 sys/ufs/ffs/ffs_alloc.c:393 #9 ufs_mkdir+0xfb sys/ufs/ufs/ufs_vnops.c:1127 #10 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #11 domkdirat+0x125 sys/kern/vfs_syscalls.c:3069 #12 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #12 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d5dc928) #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:3054 #8 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #8 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 28092 (syz-executor.0) thread 0xffff80002a18dab8 (100543) exclusive rrwlock inode r = 0 (0xfffffd8070129a38) #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 vn_closefile+0xca vn_close sys/kern/vfs_vnops.c:292 [inline] #5 vn_closefile+0xca sys/kern/vfs_vnops.c:609 #6 fdrop+0xcb sys/kern/kern_descrip.c:1274 #7 closef+0x120 sys/kern/kern_descrip.c:1258 #8 syscall+0x5ae mi_syscall sys/sys/syscall_mi.h:183 [inline] #8 syscall+0x5ae sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 22962 (syz-executor.3) thread 0xffff80002a20dac0 (78311) exclusive rrwlock inode r = 0 (0xfffffd80691d9f80) #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:1230 #6 ffs_inode_alloc+0x1c5 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfb sys/ufs/ufs/ufs_vnops.c:1127 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3069 #10 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #10 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80701292c8) #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:3054 #8 syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] #8 syscall+0x533 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10224 6412K 6419K 166960K 11562 0 pcb 15 16K 18K 166960K 21 0 rtable 218 6K 7K 166960K 5031 0 pf 27 8K 8K 166960K 199 0 ifaddr 40 15K 16K 166960K 392 0 ifgroup 46 2K 2K 166960K 390 0 sysctl 4 1K 5K 166960K 10 0 counters 62 36K 36K 166960K 234 0 ioctlops 0 0K 4K 166960K 657 0 iov 0 0K 48K 166960K 6117 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1280 80K 80K 166960K 7758 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 438 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 800 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 18 65K 121K 166960K 37127 0 sigio 0 0K 0K 166960K 1514 0 proc 56 78K 115K 166960K 4803 0 subproc 91 5K 6K 166960K 1209 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 4923 0 in_multi 88 6K 7K 166960K 1522 0 ether_multi 1 0K 0K 166960K 37 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 343 1526K 1526K 166960K 343 0 exec 0 0K 1K 166960K 5256 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 441 80K 119K 166960K 366190 0 UVM aobj 131 8K 8K 166960K 136 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1032 0 NDP 10 0K 2K 166960K 282 0 temp 70 6707K 6788K 166960K 95448 0 kqueue 14 18K 31K 166960K 3659 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 2786 0 2783 37 36 1 5 0 8 0 rtentry 112 1095 0 993 4 0 4 4 0 8 0 unpcb 144 29994 0 29979 241 240 1 10 0 8 0 syncache 320 552 0 552 62 61 1 1 0 8 1 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 652 0 652 58 58 0 1 0 8 0 tcpcb 808 19058 0 18993 300 289 11 18 0 8 0 arp 120 195 0 179 1 0 1 1 0 8 0 ipq 40 137 0 136 22 21 1 1 0 8 0 ipqe 40 539 0 538 22 21 1 1 0 8 0 inpcb 376 37264 0 37195 390 373 17 21 0 8 3 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 1 0 1 1 1 0 1 0 8 0 nd6 136 321 0 297 5 3 2 2 0 8 0 kcovpl 48 93 0 86 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 4347 0 3912 33 2 31 31 0 8 0 art_table 32 4348 0 3912 4 0 4 4 0 8 0 art_node 16 1094 0 1001 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 17 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 798 0 788 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 48658 0 47186 93 0 93 93 0 8 0 ffsino 272 48659 0 47186 99 0 99 99 0 8 0 nchpl 144 97575 0 95940 63 0 63 63 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 315771 0 315769 2 1 1 2 0 8 0 percpumem 16 131 0 86 1 0 1 1 0 8 0 kstatmem 264 192 0 172 2 0 2 2 0 8 0 scxspl 216 311008 0 311008 128 127 1 8 1 8 1 plimitpl 152 5742 0 5721 58 57 1 2 0 8 0 sigapl 424 37256 0 37207 7 0 7 7 0 8 0 futexpl 64 308328 0 308327 4 3 1 1 0 8 0 knotepl 120 1517 0 0 15 3 12 13 0 8 0 kqueuepl 216 9391 0 9382 143 142 1 6 0 8 0 pipepl 320 8904 0 8879 215 211 4 13 0 8 1 fdescpl 496 37237 0 37208 7 2 5 6 0 8 0 filepl 152 233536 0 233315 338 324 14 21 0 8 2 lockfpl 104 6322 0 6320 4 3 1 2 0 8 0 lockfspl 48 1593 0 1591 1 0 1 1 0 8 0 sessionpl 144 108 0 93 1 0 1 1 0 8 0 pgrppl 48 812 0 797 1 0 1 1 0 8 0 ucredpl 104 35064 0 35047 1 0 1 1 0 8 0 zombiepl 144 37209 0 37207 1 0 1 1 0 8 0 processpl 1136 37256 0 37207 5 0 5 5 0 8 0 procpl 680 104263 0 104197 10 2 8 9 0 8 0 sosppl 168 620 0 620 28 27 1 1 0 8 1 sockpl 584 73809 0 73722 446 432 14 24 0 8 3 mcl64k 65536 42 0 0 4 1 3 3 0 8 0 mcl16k 16384 49 0 0 3 0 3 3 0 8 1 mcl12k 12288 33 0 0 3 1 2 2 0 8 0 mcl9k 9216 38 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 89 0 0 3 0 3 3 0 8 0 mcl2k2 2112 17 0 0 2 0 2 2 0 8 0 mcl2k 2048 562 0 0 32 17 15 31 0 8 0 mtagpl 96 19 0 0 1 0 1 1 0 8 0 mbufpl 256 8097 0 0 436 0 436 436 0 8 0 bufpl 280 70491 0 64174 452 0 452 452 0 8 0 anonpl 24 3774295 0 3764087 216 114 102 111 0 186 0 amapchunkpl 152 1222870 0 1222113 335 295 40 56 0 158 2 amappl16 200 84387 0 84049 327 303 24 36 0 8 0 amappl15 192 25 0 25 7 7 0 1 0 8 0 amappl14 184 477 0 459 3 1 2 2 0 8 0 amappl13 176 185 0 182 1 0 1 1 0 8 0 amappl12 168 39235 0 39195 4 1 3 3 0 8 0 amappl11 160 76 0 66 1 0 1 1 0 8 0 amappl10 152 150 0 132 1 0 1 1 0 8 0 amappl9 144 469 0 469 62 62 0 1 0 8 0 amappl8 136 1910 0 1644 11 1 10 10 0 8 0 amappl7 128 533 0 507 2 0 2 2 0 8 0 amappl6 120 1960 0 1932 1 0 1 1 0 8 0 amappl5 112 929 0 921 1 0 1 1 0 8 0 amappl4 104 1830 0 1781 4 2 2 2 0 8 0 amappl3 96 224703 0 224624 47 43 4 4 0 8 1 amappl2 88 40133 0 40035 4 1 3 3 0 8 0 amappl1 80 145028 0 144517 23 10 13 22 0 8 0 amappl 88 363544 0 363324 7 0 7 7 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 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 37237 0 37208 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 37237 0 37208 1 0 1 1 0 8 0 vmmpekpl 168 294736 0 294663 4 0 4 4 0 8 0 vmmpepl 168 2188199 0 2185775 553 410 143 157 0 357 3 vmsppl 448 37236 0 37208 5 0 5 5 0 8 0 rwobjpl 56 540109 0 532473 125 12 113 113 0 8 0 pdppl 4096 74481 0 74416 1107 1032 75 93 0 8 10 pvpl 32 44830 0 0 363 1 362 362 0 265 0 pmappl 248 37236 0 37208 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2583 0 1778 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82cf3ff0) 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(ffffffff82e232f8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e232f8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 cnputc(62) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(62) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20fc sys/kern/subr_prf.c:1064 db_printf(ffffffff828eaf2f) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff8285735c) at panic+0xdb sys/kern/subr_prf.c:216 vop_generic_badop(ffff800033354078) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd807e757cf8,fffffd806a0f4240) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd806a0f4240) at bwrite+0x1f1 sys/kern/vfs_bio.c:757 end trace frame: 0xffff800033354160, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82cf3ff0) 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(ffffffff82e232f8) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e232f8) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 cnputc(62) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(62) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20fc sys/kern/subr_prf.c:1064 db_printf(ffffffff828eaf2f) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff8285735c) at panic+0xdb sys/kern/subr_prf.c:216 vop_generic_badop(ffff800033354078) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd807e757cf8,fffffd806a0f4240) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd806a0f4240) at bwrite+0x1f1 sys/kern/vfs_bio.c:757 VOP_BWRITE(fffffd806a0f4240) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff800033354300) at ufs_mkdir+0x52c sys/ufs/ufs/ufs_vnops.c:1175 VOP_MKDIR(fffffd805d736cf8,ffff800033354460,ffff800033354490,ffff800033354390) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002bcaea98,ffffff9c,7c7cda454c70,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3069 syscall(ffff800033354610) at syscall+0x533 mi_syscall sys/sys/syscall_mi.h:183 [inline] syscall(ffff800033354610) at syscall+0x533 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c7cda454ce0, count: -20 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x658 savectx() at savectx+0xae end of kernel end trace frame: 0x74d69ea6f5f0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x74d69ea6f5f0, count: -1