panic: vop_generic_bapadopn iStopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 275974 89585 0 0 0 1 syz-executor.6 *327678 29062 0 0x2 0 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82742aec) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff800024741608) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd8066156550,fffffd80736bceb8) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd80736bceb8) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd80736bceb8) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff8000247418a0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd80696bdc00,ffff800024741a00,ffff800024741a30,ffff800024741930) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000211f45b8,ffffff9c,7f7fffffb7e0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff800024741bb0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800024741bb0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb850, 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 674 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82742aec) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff800024741608) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd8066156550,fffffd80736bceb8) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd80736bceb8) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd80736bceb8) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff8000247418a0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd80696bdc00,ffff800024741a00,ffff800024741a30,ffff800024741930) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000211f45b8,ffffff9c,7f7fffffb7e0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff800024741bb0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800024741bb0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb850, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800024741530 rbx 0xffffffff82b25b8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff8000211f45b8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x7198eefcf35dba1f r11 0x6639e699014ceb09 r12 0xffffffff82b25990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff81b420b8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800024741520 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=327678 stat=onproc flags process=2 proc=0 pri=17, usrpri=84, nice=20 forw=0xffffffffffffffff, list=0xffff80002122a020,0xffff8000212f6b20 process=0xffff8000ffff4020 user=0xffff80002473c000, vmspace=0xfffffd806ba43388 estcpu=36, cpticks=1, pctcpu=0.11 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89585 275974 28352 0 7 0 syz-executor.6 33571 470014 1994 0 2 0 syz-executor.0 33571 259268 1994 0 2 0x4000000 syz-executor.0 33571 404258 1994 0 3 0x4000080 fsleep syz-executor.0 33889 301905 7972 0 2 0 syz-executor.7 22024 384478 77820 0 2 0 syz-executor.3 22024 102024 77820 0 3 0x4000080 fsleep syz-executor.3 22024 104735 77820 0 2 0x4000000 syz-executor.3 21150 467258 32061 0 3 0x80 nanoslp syz-executor.5 21150 100641 32061 0 3 0x4000080 kqread syz-executor.5 21150 52827 32061 0 3 0x4000080 fsleep syz-executor.5 28352 41494 42688 0 3 0x82 nanoslp syz-executor.6 7972 393942 42688 0 3 0x82 nanoslp syz-executor.7 *29062 327678 42688 0 7 0x2 syz-executor.1 32061 304189 42688 0 3 0x82 nanoslp syz-executor.5 77820 45364 42688 0 3 0x82 nanoslp syz-executor.3 1994 366951 42688 0 3 0x82 nanoslp syz-executor.0 63426 332114 42688 0 3 0x82 nanoslp syz-executor.2 2085 198768 42688 0 2 0x2 syz-executor.4 22514 253258 0 0 3 0x14200 bored sosplice 39264 372135 1 0 3 0x100083 ttyopn getty 42688 293225 51201 0 3 0x82 thrsleep syz-fuzzer 42688 390063 51201 0 3 0x4000082 nanoslp syz-fuzzer 42688 147976 51201 0 3 0x4000082 wait syz-fuzzer 42688 117407 51201 0 3 0x4000082 wait syz-fuzzer 42688 494414 51201 0 2 0x4000082 syz-fuzzer 42688 194996 51201 0 3 0x4000082 wait syz-fuzzer 42688 35931 51201 0 3 0x4000082 thrsleep syz-fuzzer 42688 164383 51201 0 3 0x4000082 thrsleep syz-fuzzer 42688 363056 51201 0 2 0x4000082 syz-fuzzer 42688 244120 51201 0 3 0x4000082 thrsleep syz-fuzzer 42688 399826 51201 0 3 0x4000082 thrsleep syz-fuzzer 42688 241958 51201 0 3 0x4000082 wait syz-fuzzer 42688 133091 51201 0 3 0x4000082 wait syz-fuzzer 42688 34995 51201 0 3 0x4000082 wait syz-fuzzer 42688 87833 51201 0 3 0x4000082 wait syz-fuzzer 42688 503202 51201 0 3 0x4000082 wait syz-fuzzer 51201 220641 78894 0 3 0x10008a sigsusp ksh 78894 18852 91783 0 2 0x9a sshd 91783 235072 1 0 3 0x88 kqread sshd 30944 63539 45257 74 3 0x1100092 bpf pflogd 45257 265198 1 0 3 0x80 netio pflogd 66425 407871 49700 73 3 0x1100090 kqread syslogd 49700 341847 1 0 3 0x100082 netio syslogd 41514 243372 1 0 3 0x100080 kqread resolvd 10084 495886 0 0 3 0x14200 bored smr 91795 166015 0 0 2 0x14200 zerothread 81693 419024 0 0 3 0x14200 aiodoned aiodoned 68616 56656 0 0 3 0x14200 syncer update 59821 496013 0 0 3 0x14200 cleaner cleaner 97429 330772 0 0 3 0x14200 reaper reaper 46475 466911 0 0 3 0x14200 pgdaemon pagedaemon 81033 483659 0 0 3 0x14200 bored viomb 41781 441899 0 0 3 0x40014200 acpi0 acpi0 18475 423396 0 0 3 0x40014200 idle1 36785 82665 0 0 3 0x14200 bored softnet 43798 8635 0 0 3 0x14200 bored softnet 52813 208443 0 0 3 0x14200 bored softnet 89619 488431 0 0 3 0x14200 bored softnet 24701 279822 0 0 3 0x14200 bored systqmp 7086 120949 0 0 3 0x14200 bored systq 6899 100336 0 0 3 0x40014200 bored softclock 14875 284042 0 0 3 0x40014200 idle0 1 275512 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 10216 6512K 6823K 78643K 22217 0 pcb 13 16K 18K 78643K 1535 0 rtable 191 16K 17K 78643K 2374 0 ifaddr 80 26K 28K 78643K 885 0 sysctl 3 1K 2K 78643K 75 0 counters 56 35K 36K 78643K 464 0 ioctlops 0 0K 4K 78643K 3648 0 iov 0 0K 32K 78643K 1280 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1605 100K 101K 78643K 12029 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 73 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 2376 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 15 53K 81K 78643K 8226 0 sigio 0 0K 0K 78643K 254 0 proc 64 67K 116K 78643K 1940 0 subproc 104 6K 6K 78643K 562 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 394 0 in_multi 69 4K 6K 78643K 843 0 ether_multi 1 0K 0K 78643K 46 0 mrt 1 0K 0K 78643K 28 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 79 360K 360K 78643K 79 0 exec 0 0K 1K 78643K 2625 0 pfkey data 0 0K 0K 78643K 7 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 347 91K 109K 78643K 59178 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 332 0 NDP 15 0K 1K 78643K 292 0 temp 141 5778K 6802K 78643K 108351 0 kqueue 7 12K 28K 78643K 714 0 SYN cache 2 16K 16K 78643K 2 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 120 758 0 756 10 9 1 3 0 8 0 rtentry 112 761 0 686 4 1 3 4 0 8 0 unpcb 144 5055 0 5043 52 51 1 6 0 8 0 syncache 296 39 0 39 13 12 1 1 0 8 1 tcpqe 32 283 0 283 6 6 0 1 0 8 0 tcpcb 776 2649 0 2645 110 106 4 17 0 8 3 arp 120 111 0 98 1 0 1 1 0 8 0 inpcb 368 8181 0 8177 163 159 4 19 0 8 3 nd6 48 169 0 153 1 0 1 1 0 8 0 pkpcb 40 33 0 33 6 6 0 1 0 8 0 kcovpl 48 43 0 35 1 0 1 1 0 8 0 mppekey 1024 8 0 8 3 3 0 1 0 8 0 ppxss 1256 112 0 112 17 17 0 1 0 8 0 pppxif 1456 29 0 29 11 11 0 1 0 8 0 pfstscr 40 64 0 64 4 4 0 1 0 8 0 pffrag 232 24 0 23 6 5 1 1 0 482 0 pffrnode 88 23 0 22 6 5 1 1 0 8 0 pffrent 40 199 0 198 8 7 1 1 0 8 0 pfosfp 40 1431 0 1007 5 0 5 5 0 8 0 pfosfpen 112 1431 0 714 21 0 21 21 0 8 0 pfanchor 1280 894 17 382 48 5 43 43 0 8 0 pfqueue 264 12 0 12 4 4 0 1 0 8 0 pfstitem 24 40 0 38 1 0 1 1 0 8 0 pfstkey 128 146 0 144 1 0 1 1 0 8 0 pfstate 384 82 0 80 2 1 1 2 0 8 0 pfrule 1344 21 0 20 2 1 1 2 0 8 0 rttmr 136 8 0 8 3 3 0 1 0 8 0 art_heap8 4096 12 0 10 8 6 2 3 0 8 0 art_heap4 256 3620 0 3275 51 24 27 29 0 8 0 art_table 32 3632 0 3285 6 2 4 4 0 8 0 art_node 16 756 0 690 1 0 1 1 0 8 0 sysvmsgpl 40 31 0 12 1 0 1 1 0 8 0 semapl 112 2374 0 2364 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 12370 0 10908 92 0 92 92 0 8 0 ffsino 272 12370 0 10908 98 0 98 98 0 8 0 nchpl 144 23192 0 21542 63 0 63 63 0 8 0 rtmask 32 9 0 9 3 3 0 1 0 8 0 uvmvnodes 80 6296 0 0 129 0 129 129 0 8 0 vnodes 216 6296 0 0 350 0 350 350 0 8 0 namei 1024 93369 0 93368 9 8 1 2 0 8 0 percpumem 16 245 0 204 1 0 1 1 0 8 0 vmpool 696 26 0 26 9 9 0 1 0 8 0 kstatmem 264 342 0 312 7 4 3 3 0 8 0 scsiplug 72 4 0 4 1 1 0 1 0 8 0 scxspl 216 75622 0 75622 30 29 1 8 0 8 1 plimitpl 152 1283 0 1268 1 0 1 1 0 8 0 sigapl 424 8488 0 8444 9 2 7 8 0 8 0 futexpl 64 76328 0 76325 5 4 1 1 0 8 0 knotepl 120 717 0 0 11 0 11 11 0 8 0 kqueuepl 216 1730 0 1724 25 24 1 8 0 8 0 pipepl 320 2503 0 2471 74 71 3 12 0 8 0 fdescpl 496 8449 0 8424 6 2 4 5 0 8 0 filepl 152 65788 0 65548 135 124 11 24 0 8 1 lockfpl 104 2785 0 2783 8 7 1 4 0 8 0 lockfspl 48 1008 0 1006 1 0 1 1 0 8 0 sessionpl 144 61 0 45 1 0 1 1 0 8 0 pgrppl 48 85 0 69 1 0 1 1 0 8 0 ucredpl 104 7640 0 7628 1 0 1 1 0 8 0 zombiepl 144 8445 0 8444 3 2 1 1 0 8 0 processpl 1072 8488 0 8444 5 0 5 5 0 8 0 procpl 696 23942 0 23877 24 15 9 11 0 8 0 srpgc 96 71 0 71 18 18 0 1 0 8 0 sosppl 168 113 0 113 18 18 0 1 0 8 0 sockpl 488 14042 0 14024 310 303 7 28 0 8 4 mcl64k 65536 27 0 0 3 0 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 24 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 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 403 0 0 40 15 25 40 0 8 0 mtagpl 96 259 0 0 5 0 5 5 0 8 0 mbufpl 256 2370 0 0 119 1 118 118 0 8 0 bufpl 288 17091 0 10763 453 0 453 453 0 8 0 anonpl 24 1819991 0 1802261 291 145 146 183 0 186 18 amapchunkpl 152 170818 0 170041 112 72 40 62 0 158 0 amappl16 200 16979 0 16436 113 82 31 42 0 8 0 amappl15 192 4 0 4 2 2 0 1 0 8 0 amappl14 184 266 0 251 2 1 1 2 0 8 0 amappl13 176 13 0 13 3 3 0 1 0 8 0 amappl12 168 849 0 845 1 0 1 1 0 8 0 amappl11 160 55 0 45 1 0 1 1 0 8 0 amappl10 152 93 0 80 1 0 1 1 0 8 0 amappl9 144 1019 0 1018 1 0 1 1 0 8 0 amappl8 136 552 0 446 4 0 4 4 0 8 0 amappl7 128 275 0 248 2 0 2 2 0 8 0 amappl6 120 369 0 355 2 1 1 2 0 8 0 amappl5 112 425 0 419 1 0 1 1 0 8 0 amappl4 104 935 0 902 2 1 1 2 0 8 0 amappl3 96 25287 0 25242 2 0 2 2 0 8 0 amappl2 88 9497 0 9434 5 3 2 4 0 8 0 amappl1 80 195194 0 194571 30 12 18 28 0 8 0 amappl 88 58122 0 57924 8 2 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 8475 0 8450 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 8475 0 8450 1 0 1 1 0 8 0 vmmpekpl 168 74424 0 74365 4 0 4 4 0 8 0 vmmpepl 168 791123 0 788612 385 249 136 201 0 357 0 vmsppl 440 8474 0 8450 5 1 4 4 0 8 0 rwobjpl 56 215553 0 207503 125 10 115 116 0 8 0 pdppl 4096 16957 0 16900 640 577 63 77 0 8 6 pvpl 32 3603742 0 3580824 617 345 272 365 0 265 57 pmappl 248 8474 0 8450 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1713 0 814 28 1 27 27 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82742aec) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff800024741608) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd8066156550,fffffd80736bceb8) at VOP_STRATEGY+0x9b sys/kern/vfs_vops.c:628 bwrite(fffffd80736bceb8) at bwrite+0x1f0 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd80736bceb8) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff8000247418a0) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd80696bdc00,ffff800024741a00,ffff800024741a30,ffff800024741930) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000211f45b8,ffffff9c,7f7fffffb7e0,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff800024741bb0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff800024741bb0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffb850, count: -11 ddb{0}> machine ddbcpu 1