ppanic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 676 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *207797 34135 32767 0x10 0 1 syz-executor.4 98912 18595 32767 0x10 0 0 syz-executor.0 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827941b0) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82811320,ffffffff827d3d36,2a4,ffffffff827c8234) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: 11 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 cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/setuid/kernel/sys/kern/kern_fork.c", line 676 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827941b0) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82811320,ffffffff827d3d36,2a4,ffffffff827c8234) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800025d2d1b0 rbx 0xffff800020d59b8f rdx 0 rcx 0 rax 0xffff800022cfb338 r8 0x101010101010101 r9 0x8080808080808080 r10 0xdf28920d64132df7 r11 0x6d9e473e5dc9de60 r12 0xffff800020d59990 r13 0 r14 0xffffffff82bd4990 cpu_info_full_primary+0x2990 r15 0x1 rip 0xffffffff81f683fc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800025d2d1a0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.4) pid=207797 stat=onproc flags process=10 proc=0 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff8000211d81a8,0xffffffff82cd2f48 process=0xffff800027b99d68 user=0xffff800025d28000, vmspace=0xfffffd806b979b10 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *34135 207797 99803 32767 7 0x10 syz-executor.4 31992 406922 6581 32767 3 0x90 nanoslp syz-executor.1 31992 113000 6581 32767 3 0x4000090 piperd syz-executor.1 31992 30330 6581 32767 3 0x4000090 fsleep syz-executor.1 83912 148090 63569 32767 3 0x90 nanoslp syz-executor.6 63569 51780 60916 0 3 0x82 wait syz-executor.6 29999 56061 1937 32767 2 0x10 syz-executor.5 1937 400644 60916 0 3 0x82 wait syz-executor.5 73155 51386 68116 32767 3 0x90 piperd syz-executor.2 68116 45580 60916 0 3 0x82 wait syz-executor.2 6581 59917 37890 32767 3 0x90 nanoslp syz-executor.1 37890 324945 60916 0 3 0x82 wait syz-executor.1 18595 98912 74278 32767 7 0x10 syz-executor.0 74278 482162 60916 0 3 0x82 wait syz-executor.0 50017 463736 71732 32767 3 0x10 biowait syz-executor.3 71732 108622 60916 0 3 0x82 wait syz-executor.3 34311 488357 94841 32767 3 0x90 piperd syz-executor.7 94841 110532 60916 0 3 0x82 wait syz-executor.7 99803 106009 9220 32767 2 0x10 syz-executor.4 9220 273602 60916 0 3 0x82 wait syz-executor.4 34484 377608 0 0 3 0x14200 bored sosplice 60916 314181 86686 0 3 0x82 wait syz-fuzzer 60916 453271 86686 0 3 0x4000082 nanoslp syz-fuzzer 60916 349392 86686 0 3 0x4000082 thrsleep syz-fuzzer 60916 331224 86686 0 3 0x4000082 wait syz-fuzzer 60916 184898 86686 0 3 0x4000082 wait syz-fuzzer 60916 201911 86686 0 3 0x4000082 kqread syz-fuzzer 60916 421303 86686 0 3 0x4000082 thrsleep syz-fuzzer 60916 358271 86686 0 3 0x4000082 thrsleep syz-fuzzer 60916 254539 86686 0 3 0x4000082 wait syz-fuzzer 60916 88834 86686 0 3 0x4000082 wait syz-fuzzer 60916 103068 86686 0 3 0x4000082 thrsleep syz-fuzzer 60916 427517 86686 0 3 0x4000082 wait syz-fuzzer 60916 110913 86686 0 3 0x4000082 thrsleep syz-fuzzer 60916 115064 86686 0 3 0x4000082 wait syz-fuzzer 60916 153636 86686 0 3 0x4000082 wait syz-fuzzer 60916 84126 86686 0 3 0x4000082 thrsleep syz-fuzzer 86686 387273 67445 0 3 0x10008a sigsusp ksh 67445 256644 92590 0 3 0x9a kqread sshd 67558 115337 1 0 3 0x100083 ttyin getty 92590 507166 1 0 3 0x88 kqread sshd 4688 101656 45418 73 3 0x1100090 kqread syslogd 45418 265199 1 0 3 0x100082 netio syslogd 7069 97522 1 0 3 0x100080 kqread resolvd 98666 500103 80928 77 3 0x100092 kqread dhcpleased 7298 108799 80928 77 3 0x100092 kqread dhcpleased 80928 89927 1 0 3 0x80 kqread dhcpleased 25519 189581 0 0 3 0x14200 bored smr 78464 297130 0 0 2 0x14200 zerothread 31957 416183 0 0 3 0x14200 aiodoned aiodoned 81178 308365 0 0 3 0x14200 syncer update 57970 226441 0 0 3 0x14200 cleaner cleaner 55738 106010 0 0 3 0x14200 reaper reaper 21113 272853 0 0 3 0x14200 pgdaemon pagedaemon 68838 169965 0 0 3 0x14200 bored viomb 19618 150142 0 0 3 0x40014200 acpi0 acpi0 12672 105003 0 0 3 0x40014200 idle1 15004 148839 0 0 3 0x14200 bored softnet3 44177 512144 0 0 3 0x14200 bored softnet2 91085 449229 0 0 3 0x14200 bored softnet1 27177 484800 0 0 3 0x14200 bored softnet0 95029 395420 0 0 3 0x14200 bored systqmp 12609 108082 0 0 3 0x14200 bored systq 57514 352406 0 0 3 0x40014200 bored softclock 84028 74596 0 0 3 0x40014200 idle0 1 448969 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 29999 (syz-executor.5) thread 0xffff80002128d088 (56061) exclusive rrwlock inode r = 0 (0xfffffd8066ed75e8) #0 witness_lock+0x447 #1 rw_enter+0x3e6 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 uvm_vnp_uncache+0x116 sys/uvm/uvm_vnode.c:1421 #6 dounlinkat+0xf6 sys/kern/vfs_syscalls.c:1883 #7 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #7 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #8 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806a205e68) #0 witness_lock+0x447 #1 rw_enter+0x3e6 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:465 #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 cache_lookup+0x2b4 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1ac sys/ufs/ufs/ufs_lookup.c:162 #8 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #10 namei+0x55a sys/kern/vfs_lookup.c:250 #11 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #13 Xsyscall+0x128 Process 18595 (syz-executor.0) thread 0xffff8000212215e0 (98912) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d30458) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3bb sys/kern/sched_bsd.c:405 #3 sleep_finish+0x1e4 sys/kern/kern_synch.c:416 #4 tsleep+0x12e sys/kern/kern_synch.c:155 #5 biowait+0x91 sys/kern/vfs_bio.c:1278 #6 bwrite+0x21c sys/kern/vfs_bio.c:769 #7 ffs_update+0x281 sys/ufs/ffs/ffs_inode.c:113 #8 ufs_mkdir+0x672 sys/ufs/ufs/ufs_vnops.c:1219 #9 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #10 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #11 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #11 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8066ed7f78) #0 witness_lock+0x447 #1 rw_enter+0x3e6 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:465 #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:1314 #8 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #9 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #10 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #11 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807a659700) #0 witness_lock+0x447 #1 rw_enter+0x3e6 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:465 #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 Process 50017 (syz-executor.3) thread 0xffff80002128c2f0 (463736) exclusive rrwlock inode r = 0 (0xfffffd806a205d58) #0 witness_lock+0x447 #1 rw_enter+0x3e6 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:465 #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:1314 #8 ufs_lookup+0x13ba sys/ufs/ufs/ufs_lookup.c:487 #9 VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807a6593d0) #0 witness_lock+0x447 #1 rw_enter+0x3e6 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:465 #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 dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10202 6411K 6419K 78643K 11338 0 pcb 13 12K 14K 78643K 17 0 rtable 252 7K 7K 78643K 3435 0 pf 29 8K 8K 78643K 67 0 ifaddr 44 15K 15K 78643K 124 0 ifgroup 50 2K 2K 78643K 126 0 sysctl 3 1K 3K 78643K 9 0 counters 60 35K 35K 78643K 98 0 ioctlops 0 0K 2K 78643K 288 0 iov 0 0K 28K 78643K 11136 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 26116 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 510 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 6470 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 21 77K 113K 78643K 32933 0 sigio 0 0K 0K 78643K 3705 0 proc 56 78K 115K 78643K 2983 0 subproc 104 6K 6K 78643K 351 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 3084 0 in_multi 99 7K 7K 78643K 750 0 ether_multi 1 0K 0K 78643K 159 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 205 917K 917K 78643K 205 0 exec 0 0K 1K 78643K 7004 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 508 98K 4567K 78643K 332853 0 UVM aobj 131 5K 5K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 1134 0 NDP 11 0K 2K 78643K 84 0 temp 74 5864K 5992K 78643K 78804 0 kqueue 12 18K 34K 78643K 2646 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 3642 0 3639 54 53 1 5 0 8 0 rtentry 112 373 0 254 4 0 4 4 0 8 0 unpcb 144 24361 0 24348 245 242 3 8 0 8 2 syncache 296 253 0 253 50 50 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 271 0 271 40 40 0 1 0 8 0 tcpcb 808 13723 0 13708 342 334 8 15 0 8 6 arp 120 65 0 45 1 0 1 1 0 8 0 ipq 40 54 0 54 16 16 0 1 0 8 0 ipqe 40 265 0 265 16 16 0 1 0 8 0 inpcb 368 29345 0 29325 405 396 9 19 0 8 6 ip6q 72 11 0 11 4 4 0 1 0 8 0 ip6af 40 11 0 11 4 4 0 1 0 8 0 nd6 136 125 0 94 2 0 2 2 0 8 0 kcovpl 48 27 0 19 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1523 0 1055 37 6 31 33 0 8 0 art_table 32 1524 0 1055 5 0 5 5 0 8 0 art_node 16 372 0 263 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 17 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 6468 0 6458 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 63996 0 62517 93 0 93 93 0 8 0 ffsino 272 63996 0 62517 100 0 100 100 0 8 0 nchpl 144 121519 0 119881 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 425398 0 425397 8 7 1 2 0 8 0 percpumem 16 62 0 19 1 0 1 1 0 8 0 kstatmem 264 60 0 38 2 0 2 2 0 8 0 scxspl 216 257481 0 257480 83 80 3 8 0 8 2 plimitpl 152 5556 0 5533 54 53 1 2 0 8 0 sigapl 424 33192 0 33142 9 2 7 7 0 8 0 futexpl 64 376133 0 376132 9 8 1 1 0 8 0 knotepl 120 1642 0 0 18 4 14 18 0 8 0 kqueuepl 216 8320 0 8312 160 155 5 6 0 8 4 pipepl 320 9572 0 9543 234 231 3 13 0 8 0 fdescpl 496 33174 0 33142 7 2 5 6 0 8 0 filepl 152 323743 0 323505 334 318 16 21 0 8 6 lockfpl 104 4724 0 4722 7 6 1 4 0 8 0 lockfspl 48 1185 0 1183 1 0 1 1 0 8 0 sessionpl 144 42 0 26 1 0 1 1 0 8 0 pgrppl 48 937 0 921 1 0 1 1 0 8 0 ucredpl 104 118419 0 118401 1 0 1 1 0 8 0 zombiepl 144 33143 0 33142 1 0 1 1 0 8 0 processpl 1072 33192 0 33142 4 0 4 4 0 8 0 procpl 696 95735 0 95668 56 48 8 9 0 8 0 sosppl 168 638 0 637 43 42 1 1 0 8 0 sockpl 488 58744 0 58710 1155 1142 13 30 0 8 8 mcl64k 65536 33 0 0 3 0 3 3 0 8 0 mcl16k 16384 49 0 0 4 1 3 3 0 8 0 mcl12k 12288 65 0 0 2 0 2 2 0 8 0 mcl9k 9216 49 0 0 3 1 2 2 0 8 0 mcl8k 8192 62 0 0 3 0 3 3 0 8 0 mcl4k 4096 49 0 0 3 0 3 3 0 8 0 mcl2k2 2112 13 0 0 1 0 1 1 0 8 0 mcl2k 2048 701 0 0 50 36 14 50 0 8 0 mtagpl 96 17 0 0 1 0 1 1 0 8 0 mbufpl 256 3037 0 0 109 1 108 108 0 8 0 bufpl 288 56382 0 50067 452 0 452 452 0 8 0 anonpl 24 3455926 0 3443248 215 104 111 122 0 186 0 amapchunkpl 152 3762092 0 3761252 37482 37325 157 4429 0 158 114 amappl16 200 77110 0 76787 384 353 31 43 0 8 8 amappl15 192 23 0 21 1 0 1 1 0 8 0 amappl14 184 227 0 214 2 1 1 2 0 8 0 amappl13 176 26 0 24 1 0 1 1 0 8 0 amappl12 168 34112 0 34074 2 0 2 2 0 8 0 amappl11 160 44 0 34 1 0 1 1 0 8 0 amappl10 152 59 0 44 1 0 1 1 0 8 0 amappl9 144 483 0 483 36 36 0 2 0 8 0 amappl8 136 1569 0 1307 11 1 10 10 0 8 0 amappl7 128 259 0 239 1 0 1 1 0 8 0 amappl6 120 844 0 812 9 7 2 2 0 8 1 amappl5 112 818 0 811 1 0 1 1 0 8 0 amappl4 104 1870 0 1824 2 0 2 2 0 8 0 amappl3 96 204698 0 204618 19 16 3 4 0 8 0 amappl2 88 36531 0 36458 4 2 2 3 0 8 0 amappl1 80 123583 0 123066 23 11 12 22 0 8 0 amappl 88 330690 0 330434 8 0 8 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 33174 0 33142 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 33174 0 33142 1 0 1 1 0 8 0 vmmpekpl 168 263692 0 263628 4 0 4 4 0 8 0 vmmpepl 168 1952902 0 1950360 480 347 133 141 0 357 5 vmsppl 464 33173 0 33142 7 2 5 6 0 8 0 rwobjpl 56 486809 0 479205 131 19 112 113 0 8 0 pdppl 4096 66356 0 66284 730 648 82 90 0 8 10 pvpl 32 9695301 0 9676439 551 353 198 336 0 265 5 pmappl 248 33173 0 33142 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2346 0 1431 27 0 27 27 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82bd3ff0) 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+0x23 __mp_lock(ffffffff82d30250) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d30250) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800027b885a0,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(70) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff82816205) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff827860f9) at panic+0xdb sys/kern/subr_prf.c:216 vop_generic_badop(ffff800027b889c8) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80698eb878,fffffd806be37c70) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 end trace frame: 0xffff800027b88a70, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82bd3ff0) 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+0x23 __mp_lock(ffffffff82d30250) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d30250) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800027b885a0,ffff80000006bc00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(70) at cnputc+0x4f sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x6bc sys/kern/subr_prf.c:724 db_printf(ffffffff82816205) at db_printf+0x89 sys/kern/subr_prf.c:498 panic(ffffffff827860f9) at panic+0xdb sys/kern/subr_prf.c:216 vop_generic_badop(ffff800027b889c8) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd80698eb878,fffffd806be37c70) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd806be37c70) at bwrite+0x1f1 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd806be37c70) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff800027b88c60) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd806911beb0,ffff800027b88dc0,ffff800027b88df0,ffff800027b88cf0) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff8000212215e0,ffffff9c,749d53ee1840,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 syscall(ffff800027b88f70) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800027b88f70) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x749d53ee18b0, count: -21 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827941b0) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82811320,ffffffff827d3d36,2a4,ffffffff827c8234) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: 11 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827941b0) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82811320,ffffffff827d3d36,2a4,ffffffff827c8234) at __assert+0x29 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x135 end trace frame: 0x0, count: -4