login: panic: vpoanpic: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 674 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 11722 51826 0 0 0 1 syz-executor.2 206651 37000 0 0x2 0 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827b3726,2a2,ffffffff827874a1) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 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/multicore/kernel/sys/kern/kern_fork.c", line 674 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827b3726,2a2,ffffffff827874a1) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000212df5f0 rbx 0xffff800020d69b8f rdx 0 rcx 0 rax 0xffff8000212ec878 r8 0x101010101010101 r9 0x8080808080808080 r10 0xd96908293a0a52e3 r11 0xb935e475f54746a6 r12 0xffff800020d69990 r13 0 r14 0xffffffff82b25990 cpu_info_full_primary+0x2990 r15 0x1 rip 0xffffffff81b420b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000212df5e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.2) pid=11722 stat=onproc flags process=0 proc=0 pri=83, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff800021222e68,0xffff8000212ed368 process=0xffff8000212a5508 user=0xffff8000212da000, vmspace=0xfffffd806f56e8a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75418 165572 16364 0 2 0 syz-executor.4 *51826 11722 42624 0 7 0 syz-executor.2 693 154813 55599 0 3 0x80 nanoslp syz-executor.6 693 252439 55599 0 3 0x4000080 fsleep syz-executor.6 91359 125066 21008 0 2 0 syz-executor.3 91359 362966 21008 0 3 0x4000080 fsleep syz-executor.3 91359 73204 21008 0 3 0x4000080 fsleep syz-executor.3 47493 510743 1 0 3 0x100083 ttyin getty 91119 104903 80092 0 2 0x2 syz-executor.0 34569 266509 80092 0 2 0x2 syz-executor.5 21008 432564 80092 0 3 0x82 nanoslp syz-executor.3 42624 251151 80092 0 3 0x82 nanoslp syz-executor.2 19966 1846 80092 0 3 0x82 nanoslp syz-executor.7 16364 353618 80092 0 2 0x2 syz-executor.4 69688 195318 0 0 3 0x14200 acct acct 55599 263872 80092 0 3 0x82 nanoslp syz-executor.6 37000 206651 80092 0 7 0x2 syz-executor.1 43531 50913 0 0 3 0x14280 nfsidl nfsio 3461 179835 0 0 3 0x14280 nfsidl nfsio 8236 1386 0 0 3 0x14280 nfsidl nfsio 24442 206183 0 0 3 0x14280 nfsidl nfsio 44649 11648 0 0 3 0x14280 nfsidl nfsio 8023 261678 0 0 3 0x14280 nfsidl nfsio 59833 168600 0 0 3 0x14280 nfsidl nfsio 82202 290561 0 0 3 0x14280 nfsidl nfsio 12993 214713 0 0 3 0x14280 nfsidl nfsio 45187 110372 0 0 3 0x14280 nfsidl nfsio 91375 61756 0 0 3 0x14280 nfsidl nfsio 47847 442457 0 0 3 0x14280 nfsidl nfsio 58197 416997 0 0 3 0x14280 nfsidl nfsio 98966 22615 0 0 3 0x14280 nfsidl nfsio 74988 213220 0 0 3 0x14280 nfsidl nfsio 90166 212839 0 0 3 0x14280 nfsidl nfsio 99046 427566 0 0 3 0x14280 nfsidl nfsio 33085 454429 0 0 3 0x14280 nfsidl nfsio 54438 474613 0 0 3 0x14280 nfsidl nfsio 78823 167662 0 0 3 0x14280 nfsidl nfsio 78986 132330 0 0 3 0x14200 bored sosplice 80092 147523 42674 0 3 0x82 wait syz-fuzzer 80092 178146 42674 0 3 0x4000082 nanoslp syz-fuzzer 80092 348751 42674 0 3 0x4000082 thrsleep syz-fuzzer 80092 149321 42674 0 3 0x4000082 thrsleep syz-fuzzer 80092 516244 42674 0 3 0x4000082 wait syz-fuzzer 80092 89796 42674 0 2 0x4000082 syz-fuzzer 80092 482904 42674 0 3 0x4000082 wait syz-fuzzer 80092 376983 42674 0 3 0x4000082 wait syz-fuzzer 80092 24917 42674 0 3 0x4000082 wait syz-fuzzer 80092 2957 42674 0 3 0x4000082 thrsleep syz-fuzzer 80092 265319 42674 0 3 0x4000082 thrsleep syz-fuzzer 80092 442864 42674 0 2 0x4000082 syz-fuzzer 80092 313292 42674 0 3 0x4000082 thrsleep syz-fuzzer 80092 26496 42674 0 3 0x4000082 wait syz-fuzzer 80092 367784 42674 0 3 0x4000082 wait syz-fuzzer 80092 185118 42674 0 3 0x4000082 wait syz-fuzzer 42674 175757 80960 0 3 0x10008a sigsusp ksh 80960 225467 6036 0 2 0x9a sshd 6036 262817 1 0 3 0x88 kqread sshd 41616 332238 23659 74 3 0x1100092 bpf pflogd 23659 381976 1 0 3 0x80 netio pflogd 90656 177247 62655 73 3 0x1100090 kqread syslogd 62655 515171 1 0 3 0x100082 netio syslogd 91221 309803 1 0 3 0x100080 kqread resolvd 38414 201243 0 0 3 0x14200 bored smr 22785 471167 0 0 2 0x14200 zerothread 49417 494308 0 0 3 0x14200 aiodoned aiodoned 63825 480728 0 0 3 0x14200 syncer update 68833 465877 0 0 3 0x14200 cleaner cleaner 4719 441448 0 0 3 0x14200 reaper reaper 77302 188009 0 0 3 0x14200 pgdaemon pagedaemon 36371 71238 0 0 3 0x14200 bored viomb 55349 504069 0 0 3 0x40014200 acpi0 acpi0 37099 190021 0 0 3 0x40014200 idle1 4890 143875 0 0 3 0x14200 bored softnet 17910 55153 0 0 3 0x14200 bored softnet 30974 169884 0 0 2 0x14200 softnet 84987 371720 0 0 3 0x14200 bored softnet 69854 428503 0 0 3 0x14200 bored systqmp 56767 409677 0 0 3 0x14200 bored systq 49735 294413 0 0 3 0x40014200 bored softclock 81358 441153 0 0 3 0x40014200 idle0 1 15531 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10228 6499K 6677K 78643K 14206 0 pcb 13 18K 23K 78643K 2292 0 rtable 189 16K 19K 78643K 2409 0 ifaddr 82 28K 31K 78643K 1125 0 sysctl 2 0K 2K 78643K 8 0 counters 58 35K 36K 78643K 736 0 ioctlops 0 0K 4K 78643K 2983 0 iov 0 0K 44K 78643K 18258 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1431 89K 90K 78643K 6521 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 97 0 VM map 2 1K 1K 78643K 2 0 sem 18 2K 2K 78643K 111 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 93K 78643K 11369 0 sigio 0 0K 0K 78643K 302 0 proc 65 67K 140K 78643K 2289 0 subproc 104 6K 6K 78643K 678 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 453 0 in_multi 73 5K 6K 78643K 863 0 ether_multi 1 0K 0K 78643K 66 0 mrt 1 0K 0K 78643K 60 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 157 705K 705K 78643K 157 0 exec 0 0K 1K 78643K 2139 0 pfkey data 0 0K 0K 78643K 75 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 356 94K 110K 78643K 83621 0 UVM aobj 131 4K 4K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 431 0 NDP 16 0K 2K 78643K 379 0 temp 143 5778K 6803K 78643K 93763 0 kqueue 6 10K 24K 78643K 650 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 120 968 0 967 12 11 1 3 0 8 0 rtentry 112 800 0 726 4 1 3 4 0 8 0 unpcb 144 7568 0 7560 77 76 1 9 0 8 0 syncache 296 69 0 69 17 17 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 517 108 517 6 6 0 1 0 8 0 tcpcb 776 4495 0 4479 123 114 9 15 0 8 7 arp 120 117 0 105 1 0 1 1 0 8 0 inpcb 368 12929 0 12913 158 150 8 16 0 8 6 nd6 48 181 0 162 1 0 1 1 0 8 0 pkpcb 40 101 0 101 10 10 0 1 0 8 0 kcovpl 48 52 0 44 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1256 186 0 185 23 22 1 1 0 8 0 pppxif 1456 37 0 37 13 13 0 1 0 8 0 pfstscr 40 6 0 6 2 2 0 1 0 8 0 pffrag 232 105 0 104 7 6 1 1 0 482 0 pffrnode 88 99 0 98 7 6 1 1 0 8 0 pffrent 40 227 0 226 7 6 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 1280 406 0 201 23 2 21 23 0 8 0 pfqueue 264 4 0 4 1 1 0 1 0 8 0 pfstitem 24 118 0 116 1 0 1 1 0 8 0 pfstkey 128 127 0 125 2 1 1 2 0 8 0 pfstate 384 121 0 119 5 4 1 5 0 8 0 pfrule 1344 21 0 20 2 1 1 2 0 8 0 rttmr 136 20 0 20 8 8 0 1 0 8 0 art_heap8 4096 10 0 9 8 7 1 3 0 8 0 art_heap4 256 4099 0 3766 58 35 23 30 0 8 0 art_table 32 4109 0 3775 4 0 4 4 0 8 0 art_node 16 791 0 729 1 0 1 1 0 8 0 semupl 112 8 0 8 2 2 0 1 0 8 0 semapl 112 103 0 87 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 19539 0 18066 93 0 93 93 0 8 0 ffsino 272 19539 0 18066 99 0 99 99 0 8 0 nchpl 144 36680 0 35030 63 1 62 63 0 8 0 rtmask 32 10 0 10 4 4 0 1 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 131680 0 131679 6 5 1 2 0 8 0 percpumem 16 381 0 339 1 0 1 1 0 8 0 vmpool 696 79 0 79 14 14 0 1 0 8 0 kstatmem 264 526 0 494 4 1 3 3 0 8 0 scsiplug 72 6 0 6 2 2 0 1 0 8 0 scxspl 216 95478 0 95478 34 33 1 8 0 8 1 plimitpl 152 1360 0 1345 1 0 1 1 0 8 0 sigapl 424 11618 0 11554 10 2 8 8 0 8 0 futexpl 64 117357 0 117354 1 0 1 1 0 8 0 knotepl 120 701 0 0 11 0 11 11 0 8 0 kqueuepl 216 2051 0 2046 29 28 1 5 0 8 0 pipepl 320 2857 0 2829 65 62 3 11 0 8 0 fdescpl 496 11578 0 11554 6 2 4 5 0 8 0 filepl 152 89186 0 88964 119 107 12 20 0 8 3 lockfpl 104 14644 0 14642 26 25 1 4 0 8 0 lockfspl 48 3558 0 3556 1 0 1 1 0 8 0 sessionpl 144 73 0 57 1 0 1 1 0 8 0 pgrppl 48 355 0 339 1 0 1 1 0 8 0 ucredpl 104 11212 0 11201 1 0 1 1 0 8 0 zombiepl 144 11555 0 11554 3 2 1 1 0 8 0 processpl 1072 11618 0 11554 5 0 5 5 0 8 0 procpl 696 32677 0 32595 27 17 10 11 0 8 0 srpgc 96 81 0 81 21 21 0 1 0 8 0 sosppl 168 144 0 142 9 8 1 1 0 8 0 sockpl 488 21575 0 21550 398 386 12 29 0 8 8 mcl64k 65536 33 0 0 5 2 3 3 0 8 0 mcl16k 16384 41 0 0 5 3 2 3 0 8 0 mcl12k 12288 41 0 0 2 0 2 2 0 8 0 mcl9k 9216 18 0 0 2 0 2 2 0 8 0 mcl8k 8192 33 0 0 4 1 3 3 0 8 0 mcl4k 4096 26 0 0 3 0 3 3 0 8 0 mcl2k2 2112 13 0 0 1 0 1 1 0 8 0 mcl2k 2048 487 0 0 58 18 40 58 0 8 2 mtagpl 96 47 0 0 2 0 2 2 0 8 0 mbufpl 256 7231 0 0 438 1 437 437 0 8 0 bufpl 288 21688 0 15366 452 0 452 452 0 8 0 anonpl 24 2407354 0 2389104 168 18 150 160 0 186 0 amapchunkpl 152 225450 0 224700 76 40 36 54 0 158 0 amappl16 200 23881 0 23301 173 140 33 44 0 8 0 amappl15 192 12 0 12 4 4 0 1 0 8 0 amappl14 184 313 0 300 2 1 1 2 0 8 0 amappl13 176 13 0 13 3 3 0 1 0 8 0 amappl12 168 1007 0 1000 1 0 1 1 0 8 0 amappl11 160 58 0 49 1 0 1 1 0 8 0 amappl10 152 135 0 122 1 0 1 1 0 8 0 amappl9 144 1038 0 1038 19 18 1 1 0 8 1 amappl8 136 688 0 558 6 1 5 5 0 8 0 amappl7 128 298 0 270 2 0 2 2 0 8 0 amappl6 120 479 0 461 2 1 1 2 0 8 0 amappl5 112 456 0 450 1 0 1 1 0 8 0 amappl4 104 1186 0 1146 3 1 2 2 0 8 0 amappl3 96 37711 0 37671 2 0 2 2 0 8 0 amappl2 88 12858 0 12798 4 2 2 4 0 8 0 amappl1 80 268983 0 268386 31 15 16 28 0 8 0 amappl 88 79491 0 79308 10 3 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 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 11657 0 11633 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11657 0 11633 1 0 1 1 0 8 0 vmmpekpl 168 96482 0 96416 4 0 4 4 0 8 0 vmmpepl 168 1101634 0 1099142 275 140 135 165 0 357 0 vmsppl 440 11656 0 11633 6 2 4 5 0 8 0 rwobjpl 56 296974 0 289259 117 3 114 116 0 8 0 pdppl 4096 23321 0 23266 647 584 63 83 0 8 8 pvpl 32 4565097 0 4541859 367 131 236 367 0 265 0 pmappl 248 11656 0 11633 3 1 2 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2064 0 831 36 0 36 36 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82b24ff0) at x86_ipi_db+0x1a 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(ffffffff82db6020) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82db6020) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000212b0fb0,ffff80000067c100) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge24_untramp() at Xintr_ioapic_edge24_untramp+0x18f Xspllower() at Xspllower+0x19 cnputc(70) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff827d3cc9) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff82742aec) at panic+0xd7 sys/kern/subr_prf.c:216 vop_generic_badop(ffff8000212b13d8) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd805b5b0cc0,fffffd8067f96138) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 end trace frame: 0xffff8000212b1480, count: 0 ddb{0}> trace x86_ipi_db(ffffffff82b24ff0) at x86_ipi_db+0x1a 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(ffffffff82db6020) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82db6020) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000212b0fb0,ffff80000067c100) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge24_untramp() at Xintr_ioapic_edge24_untramp+0x18f Xspllower() at Xspllower+0x19 cnputc(70) at cnputc+0x4b sys/dev/cons.c:218 db_putchar(70) at db_putchar+0x3fc sys/ddb/db_output.c:155 kprintf() at kprintf+0x20ec sys/kern/subr_prf.c:1064 db_printf(ffffffff827d3cc9) at db_printf+0x85 sys/kern/subr_prf.c:498 panic(ffffffff82742aec) at panic+0xd7 sys/kern/subr_prf.c:216 vop_generic_badop(ffff8000212b13d8) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd805b5b0cc0,fffffd8067f96138) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd8067f96138) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd8067f96138) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff8000212b1670) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd8061de90f0,ffff8000212b17d0,ffff8000212b1800,ffff8000212b1700) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000212ec5c0,ffffff9c,7f7ffffc2bf0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff8000212b1980) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff8000212b1980) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc2c60, count: -21 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827b3726,2a2,ffffffff827874a1) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 end trace frame: 0x0, count: 11 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82751deb) at panic+0x177 sys/kern/subr_prf.c:198 __assert(ffffffff827cd2be,ffffffff827b3726,2a2,ffffffff827874a1) at __assert+0x25 sys/kern/subr_prf.c:157 proc_trampoline_mp() at proc_trampoline_mp+0x131 end trace frame: 0x0, count: -4