panic: vop_genepriacn_ibcado: p kStopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 487054 99665 0 0 0x4000000 1 syz-executor.4 *341096 74106 0 0x2 0 0 syz-executor.7 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82784752) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002e3fd948) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd8078511130,fffffd807e0b0940) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd807e0b0940) at bwrite+0x1f4 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd807e0b0940) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e3fdbe0) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd806bbd47e0,ffff80002e3fdd40,ffff80002e3fdd70,ffff80002e3fdc70) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002121d620,ffffff9c,7a4f8b3ab0e0,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 syscall(ffff80002e3fdef0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e3fdef0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4f8b3ab150, count: 4 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: vop_generic_badop cpu1: kernel diagnostic assertion "!_kernel_lock_held()" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_fork.c", line 675 ddb{0}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82784752) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002e3fd948) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd8078511130,fffffd807e0b0940) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd807e0b0940) at bwrite+0x1f4 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd807e0b0940) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e3fdbe0) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd806bbd47e0,ffff80002e3fdd40,ffff80002e3fdd70,ffff80002e3fdc70) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002121d620,ffffff9c,7a4f8b3ab0e0,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 syscall(ffff80002e3fdef0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e3fdef0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4f8b3ab150, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e3fd870 rbx 0xffffffff82c1bb8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff80002121d620 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb53b10c8f5d3cc9e r11 0xacb9a91fb3711636 r12 0xffffffff82c1b990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff825d823c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002e3fd860 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.7) pid=341096 stat=onproc flags process=2 proc=0 pri=17, usrpri=83, nice=20 forw=0xffffffffffffffff, list=0xffff8000212b8858,0xffff8000212b85b0 process=0xffff80002127e9f8 user=0xffff80002e3f8000, vmspace=0xfffffd8067229590 estcpu=36, cpticks=0, pctcpu=0.3 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20738 464988 81833 0 2 0 syz-executor.5 2108 400168 92777 0 2 0 syz-executor.1 2108 309787 92777 0 3 0x4000080 fsleep syz-executor.1 2108 286239 92777 0 2 0x4000000 syz-executor.1 99665 202542 44727 0 2 0 syz-executor.4 99665 487054 44727 0 7 0x4000000 syz-executor.4 16623 299611 35733 0 2 0 syz-executor.0 16623 121447 35733 0 2 0x4000000 syz-executor.0 9171 219335 35080 0 2 0 syz-executor.2 9171 139102 35080 0 3 0x4000080 fsleep syz-executor.2 47344 442212 92401 0 2 0 syz-executor.6 47344 394998 92401 0 3 0x4000080 ttyout syz-executor.6 64742 37210 20078 0 2 0x2 syz-executor.3 *74106 341096 20078 0 7 0x2 syz-executor.7 35733 350960 20078 0 3 0x82 nanoslp syz-executor.0 92777 226414 20078 0 3 0x82 nanoslp syz-executor.1 35080 353928 20078 0 3 0x82 nanoslp syz-executor.2 81833 56696 20078 0 3 0x82 nanoslp syz-executor.5 92401 348314 20078 0 3 0x82 nanoslp syz-executor.6 14038 284700 1 0 3 0x100083 ttyin getty 27140 195362 0 0 3 0x14200 bored sosplice 44727 469781 20078 0 3 0x82 nanoslp syz-executor.4 20078 291312 54993 0 3 0x82 wait syz-fuzzer 20078 116952 54993 0 3 0x4000082 nanoslp syz-fuzzer 20078 141921 54993 0 3 0x4000082 thrsleep syz-fuzzer 20078 310768 54993 0 3 0x4000082 wait syz-fuzzer 20078 61063 54993 0 3 0x4000082 wait syz-fuzzer 20078 341491 54993 0 3 0x4000082 wait syz-fuzzer 20078 313094 54993 0 3 0x4000082 thrsleep syz-fuzzer 20078 159097 54993 0 3 0x4000082 wait syz-fuzzer 20078 513878 54993 0 3 0x4000082 thrsleep syz-fuzzer 20078 423926 54993 0 3 0x4000082 wait syz-fuzzer 20078 9180 54993 0 3 0x4000082 thrsleep syz-fuzzer 20078 43602 54993 0 3 0x4000082 thrsleep syz-fuzzer 20078 403788 54993 0 3 0x4000082 wait syz-fuzzer 20078 61213 54993 0 3 0x4000082 kqread syz-fuzzer 20078 499050 54993 0 3 0x4000082 thrsleep syz-fuzzer 20078 498587 54993 0 3 0x4000082 wait syz-fuzzer 54993 348095 80553 0 3 0x10008a sigsusp ksh 80553 89370 25676 0 3 0x9a kqread sshd 25676 127214 1 0 3 0x88 kqread sshd 14302 422032 91829 74 3 0x1100092 bpf pflogd 91829 174470 1 0 3 0x80 netio pflogd 55383 486803 5134 73 3 0x1100090 kqread syslogd 5134 304426 1 0 3 0x100082 netio syslogd 73026 379349 1 0 3 0x100080 kqread resolvd 62989 328462 0 0 3 0x14200 bored smr 91486 184416 0 0 2 0x14200 zerothread 70868 124901 0 0 3 0x14200 aiodoned aiodoned 41185 472484 0 0 3 0x14200 syncer update 39320 365204 0 0 3 0x14200 cleaner cleaner 14327 270157 0 0 3 0x14200 reaper reaper 54660 521665 0 0 3 0x14200 pgdaemon pagedaemon 11390 379351 0 0 3 0x14200 bored viomb 66140 3390 0 0 3 0x40014200 acpi0 acpi0 68153 387900 0 0 3 0x40014200 idle1 40032 346206 0 0 3 0x14200 bored softnet3 12798 463862 0 0 3 0x14200 bored softnet2 13975 241123 0 0 3 0x14200 bored softnet1 20177 277407 0 0 3 0x14200 bored softnet0 5420 428656 0 0 3 0x14200 bored systqmp 57383 372662 0 0 3 0x14200 bored systq 61908 505223 0 0 3 0x40014200 bored softclock 73794 17271 0 0 3 0x40014200 idle0 1 415890 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 6490K 6807K 78643K 12953 0 pcb 13 16K 19K 78643K 3341 0 rtable 244 17K 18K 78643K 1575 0 ifaddr 86 28K 30K 78643K 735 0 sysctl 2 0K 0K 78643K 8 0 counters 60 35K 36K 78643K 470 0 ioctlops 0 0K 4K 78643K 2126 0 iov 0 0K 48K 78643K 3146 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1402 88K 88K 78643K 6270 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 84 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 1158 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 89K 78643K 6653 0 sigio 0 0K 0K 78643K 185 0 proc 65 67K 115K 78643K 1343 0 subproc 104 6K 6K 78643K 338 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 347 0 in_multi 92 6K 6K 78643K 441 0 ether_multi 1 0K 0K 78643K 15 0 mrt 1 0K 0K 78643K 13 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 1K 78643K 1155 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 353 92K 105K 78643K 56784 0 UVM aobj 131 4K 4K 78643K 144 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 230 0 NDP 15 0K 1K 78643K 200 0 temp 140 5862K 71526K 78643K 71851 0 kqueue 6 10K 26K 78643K 403 0 SYN cache 2 9K 17K 78643K 3 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 120 622 0 621 8 7 1 3 0 8 0 rtentry 112 462 0 359 4 0 4 4 0 8 0 unpcb 144 4129 0 4121 54 53 1 9 0 8 0 syncache 296 32 0 32 10 10 0 1 0 8 0 tcpqe 32 421 0 421 9 9 0 2 0 8 0 tcpcb 776 3991 0 3984 98 97 1 8 0 8 0 arp 120 63 0 44 1 0 1 1 0 8 0 inpcb 368 10111 0 10104 180 176 4 19 0 8 3 nd6 136 98 0 72 1 0 1 1 0 8 0 pkpcb 40 15 0 15 5 5 0 1 0 8 0 kcovpl 48 26 0 18 1 0 1 1 0 8 0 mppekey 1024 41 0 41 3 3 0 1 0 8 0 ppxss 1256 115 0 115 15 15 0 1 0 8 0 pppxif 1456 76 0 76 11 11 0 1 0 8 0 pfstscr 40 143 0 143 5 5 0 2 0 8 0 pffrag 232 18 0 16 4 3 1 1 0 482 0 pffrnode 88 18 0 16 4 3 1 1 0 8 0 pffrent 40 84 0 82 4 3 1 1 0 8 0 pfosfp 40 1436 0 1011 5 0 5 5 0 8 0 pfosfpen 112 1436 0 718 21 0 21 21 0 8 0 pfanchor 1288 635 3 123 43 0 43 43 0 8 0 pfqueue 264 3 0 3 1 1 0 1 0 8 0 pfstitem 24 275 0 273 1 0 1 1 0 8 0 pfstkey 128 289 0 287 3 2 1 3 0 8 0 pfstate 384 213 0 211 11 10 1 7 0 8 0 pfrule 1344 21 0 20 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 1897 0 1466 45 17 28 29 0 8 0 art_table 32 1899 0 1467 4 0 4 4 0 8 0 art_node 16 437 0 345 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 7 1 1 0 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 1154 0 1144 1 0 1 1 0 8 0 shmpl 112 141 0 13 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 12723 0 11254 93 0 93 93 0 8 0 ffsino 272 12723 0 11254 99 0 99 99 0 8 0 nchpl 144 21842 0 21298 63 40 23 63 0 8 0 rtmask 32 4 0 4 2 2 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 82453 0 82452 5 4 1 2 0 8 0 percpumem 16 248 0 205 1 0 1 1 0 8 0 kstatmem 264 272 0 242 8 5 3 3 0 8 1 scsiplug 72 9 0 9 3 3 0 1 0 8 0 scxspl 216 57134 0 57134 18 17 1 8 0 8 1 plimitpl 152 886 0 869 1 0 1 1 0 8 0 sigapl 424 6966 0 6922 10 4 6 8 0 8 0 futexpl 64 74915 0 74913 2 1 1 1 0 8 0 knotepl 120 735 0 0 12 1 11 12 0 8 0 kqueuepl 216 1345 0 1340 30 27 3 5 0 8 2 pipepl 320 1238 0 1210 39 36 3 8 0 8 0 fdescpl 496 6928 0 6902 5 0 5 5 0 8 0 filepl 152 58167 0 57942 103 89 14 21 0 8 2 lockfpl 104 1227 0 1219 3 2 1 2 0 8 0 lockfspl 48 308 0 303 1 0 1 1 0 8 0 sessionpl 144 47 0 31 1 0 1 1 0 8 0 pgrppl 48 170 0 154 1 0 1 1 0 8 0 ucredpl 104 18176 0 18166 1 0 1 1 0 8 0 zombiepl 144 6922 0 6922 2 1 1 1 0 8 1 processpl 1072 6966 0 6922 5 1 4 5 0 8 0 procpl 696 19147 0 19082 15 7 8 10 0 8 0 srpgc 96 22 0 22 9 9 0 1 0 8 0 sosppl 168 75 0 75 13 13 0 1 0 8 0 sockpl 488 14883 0 14867 325 317 8 32 0 8 5 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 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 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 444 0 0 52 18 34 52 0 8 0 mtagpl 96 13 0 0 1 0 1 1 0 8 0 mbufpl 256 1231 0 0 56 0 56 56 0 8 0 bufpl 288 13971 0 7654 452 0 452 452 0 8 0 anonpl 24 822681 0 806757 175 68 107 125 0 186 0 amapchunkpl 152 170290 0 169447 58 20 38 44 0 158 0 amappl16 200 17014 0 16536 86 59 27 39 0 8 0 amappl15 192 34 0 32 1 0 1 1 0 8 0 amappl14 184 234 0 220 2 1 1 2 0 8 0 amappl13 176 15 0 14 1 0 1 1 0 8 0 amappl12 168 7898 0 7870 4 2 2 3 0 8 0 amappl11 160 70 0 61 1 0 1 1 0 8 0 amappl10 152 75 0 65 1 0 1 1 0 8 0 amappl9 144 324 0 324 16 16 0 2 0 8 0 amappl8 136 463 0 363 4 0 4 4 0 8 0 amappl7 128 106 0 89 1 0 1 1 0 8 0 amappl6 120 451 0 428 2 1 1 2 0 8 0 amappl5 112 320 0 314 1 0 1 1 0 8 0 amappl4 104 1015 0 975 4 2 2 3 0 8 0 amappl3 96 41733 0 41658 4 1 3 3 0 8 0 amappl2 88 7416 0 7361 3 1 2 3 0 8 0 amappl1 80 115414 0 114817 26 10 16 23 0 8 0 amappl 88 55877 0 55660 6 0 6 6 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 72 143 0 13 3 0 3 3 0 8 0 uaddrrnd 24 6928 0 6902 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6928 0 6902 1 0 1 1 0 8 0 vmmpekpl 168 56878 0 56828 3 0 3 3 0 8 0 vmmpepl 168 613761 0 611216 308 185 123 149 0 357 0 vmsppl 464 6927 0 6902 5 0 5 5 0 8 0 rwobjpl 56 172362 0 164731 114 2 112 112 0 8 0 pdppl 4096 13863 0 13804 723 660 63 81 0 8 4 pvpl 32 2082136 0 2061020 445 260 185 345 0 265 0 pmappl 248 6927 0 6902 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1744 0 897 25 0 25 25 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(ffffffff82784752) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002e3fd948) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd8078511130,fffffd807e0b0940) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd807e0b0940) at bwrite+0x1f4 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd807e0b0940) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e3fdbe0) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd806bbd47e0,ffff80002e3fdd40,ffff80002e3fdd70,ffff80002e3fdc70) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002121d620,ffffff9c,7a4f8b3ab0e0,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 syscall(ffff80002e3fdef0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e3fdef0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a4f8b3ab150, count: -11 ddb{0}> machine ddbcpu 1