panic: voppan_giecn:e r i kce_rbnaedlop dStopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 377169 32464 32767 0x10 0 1 syz-executor.0 *295795 7837 32767 0x10 0 0 syz-executor.2 db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82785107) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002e4155d8) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd807c97c6c8,fffffd8063f474b8) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8063f474b8) at bwrite+0x1f4 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd8063f474b8) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e415870) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd806690b028,ffff80002e4159d0,ffff80002e415a00,ffff80002e415900) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002126eb18,ffffff9c,7aa3df7fbbb0,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 syscall(ffff80002e415b80) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e415b80) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7aa3df7fbc20, 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/setuid/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(ffffffff82785107) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002e4155d8) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd807c97c6c8,fffffd8063f474b8) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8063f474b8) at bwrite+0x1f4 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd8063f474b8) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e415870) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd806690b028,ffff80002e4159d0,ffff80002e415a00,ffff80002e415900) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002126eb18,ffffff9c,7aa3df7fbbb0,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 syscall(ffff80002e415b80) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e415b80) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7aa3df7fbc20, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002e415500 rbx 0xffffffff82c02b8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff80002126eb18 r8 0x101010101010101 r9 0x8080808080808080 r10 0x2de47cdfec6d7a88 r11 0xbb2e46e9febf5abd r12 0xffffffff82c02990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff8124642c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002e4154f0 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.2) pid=295795 stat=onproc flags process=10 proc=0 pri=17, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002126f8b0,0xffff8000212a0308 process=0xffff8000289a8448 user=0xffff80002e410000, vmspace=0xfffffd8066c8b768 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 73281 174206 54251 32767 2 0x10 syz-executor.1 73281 450581 54251 32767 2 0x4000010 syz-executor.1 73281 491505 54251 32767 2 0x4000010 syz-executor.1 32464 377169 57253 32767 7 0x10 syz-executor.0 45126 274236 85464 32767 2 0x10 syz-executor.6 93838 378512 50997 32767 2 0x10 syz-executor.3 93838 291612 50997 32767 3 0x4000090 ttyout syz-executor.3 57253 416093 53109 32767 3 0x90 nanoslp syz-executor.0 53109 361338 19556 0 3 0x82 wait syz-executor.0 70057 297258 40475 32767 2 0x10 syz-executor.4 40475 123177 19556 0 3 0x82 wait syz-executor.4 50997 88969 49456 32767 3 0x90 nanoslp syz-executor.3 49456 54665 19556 0 3 0x82 wait syz-executor.3 84486 165142 30567 32767 2 0x10 syz-executor.5 30567 496550 19556 0 3 0x82 wait syz-executor.5 54251 88110 73922 32767 3 0x90 nanoslp syz-executor.1 73922 170903 19556 0 3 0x82 wait syz-executor.1 85464 252538 81192 32767 3 0x90 nanoslp syz-executor.6 81192 41393 19556 0 3 0x82 wait syz-executor.6 91096 112302 99845 32767 2 0x10 syz-executor.7 99845 336496 19556 0 3 0x82 wait syz-executor.7 88609 85268 0 0 3 0x14200 bored sosplice * 7837 295795 67273 32767 7 0x10 syz-executor.2 67273 359760 19556 0 3 0x82 wait syz-executor.2 19556 326577 21335 0 3 0x82 thrsleep syz-fuzzer 19556 159511 21335 0 3 0x4000082 nanoslp syz-fuzzer 19556 212091 21335 0 3 0x4000082 thrsleep syz-fuzzer 19556 197378 21335 0 3 0x4000082 wait syz-fuzzer 19556 122451 21335 0 3 0x4000082 wait syz-fuzzer 19556 105053 21335 0 3 0x4000082 thrsleep syz-fuzzer 19556 256403 21335 0 3 0x4000082 kqread syz-fuzzer 19556 109302 21335 0 3 0x4000082 wait syz-fuzzer 19556 295686 21335 0 3 0x4000082 wait syz-fuzzer 19556 216668 21335 0 3 0x4000082 thrsleep syz-fuzzer 19556 420669 21335 0 3 0x4000082 thrsleep syz-fuzzer 19556 354671 21335 0 3 0x4000082 wait syz-fuzzer 19556 372181 21335 0 3 0x4000082 thrsleep syz-fuzzer 19556 45233 21335 0 3 0x4000082 wait syz-fuzzer 19556 259127 21335 0 3 0x4000082 wait syz-fuzzer 19556 415359 21335 0 3 0x4000082 wait syz-fuzzer 21335 3836 72525 0 3 0x10008a sigsusp ksh 72525 432183 59580 0 3 0x9a kqread sshd 20620 147638 1 0 3 0x100083 ttyin getty 59580 136356 1 0 3 0x88 kqread sshd 13497 358327 80927 73 3 0x1100090 kqread syslogd 80927 94755 1 0 3 0x100082 netio syslogd 85280 215746 1 0 3 0x100080 kqread resolvd 11017 70553 30702 77 3 0x100092 kqread dhcpleased 41793 176439 30702 77 3 0x100092 kqread dhcpleased 30702 71325 1 0 3 0x80 kqread dhcpleased 86375 386704 0 0 3 0x14200 bored smr 39302 61374 0 0 2 0x14200 zerothread 6795 355930 0 0 3 0x14200 aiodoned aiodoned 70638 13773 0 0 3 0x14200 syncer update 20220 344371 0 0 3 0x14200 cleaner cleaner 23509 452139 0 0 3 0x14200 reaper reaper 14811 23404 0 0 3 0x14200 pgdaemon pagedaemon 82274 448064 0 0 3 0x14200 bored viomb 62152 83543 0 0 3 0x40014200 acpi0 acpi0 61440 210700 0 0 3 0x40014200 idle1 7391 486160 0 0 3 0x14200 bored softnet3 64582 140008 0 0 3 0x14200 bored softnet2 26678 22262 0 0 3 0x14200 bored softnet1 10308 354157 0 0 3 0x14200 bored softnet0 99120 119998 0 0 3 0x14200 bored systqmp 84237 516045 0 0 3 0x14200 bored systq 34608 33977 0 0 3 0x40014200 bored softclock 17240 425598 0 0 3 0x40014200 idle0 1 445090 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 7837 (syz-executor.2) thread 0xffff80002126eb18 (295795) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d66df0) #0 witness_lock+0x44d #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x3c3 sys/kern/sched_bsd.c:405 #3 sleep_finish+0x184 sys/kern/kern_synch.c:417 #4 tsleep+0x12b sys/kern/kern_synch.c:155 #5 biowait+0x91 sys/kern/vfs_bio.c:1278 #6 bwrite+0x21f 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:3074 #11 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #11 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806e677920) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f 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:1324 #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:3074 #12 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #12 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80691fc4e0) #0 witness_lock+0x44d #1 rw_enter+0x3e5 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8f 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:3059 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10209 6412K 6419K 78643K 11391 0 pcb 13 12K 14K 78643K 17 0 rtable 248 7K 7K 78643K 2828 0 ifaddr 73 24K 25K 78643K 259 0 sysctl 3 1K 3K 78643K 6 0 counters 60 35K 35K 78643K 120 0 ioctlops 0 0K 2K 78643K 187 0 iov 0 0K 28K 78643K 2967 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 5052 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 13K 78643K 274 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 4815 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 121K 78643K 18510 0 sigio 0 0K 0K 78643K 170 0 proc 56 78K 115K 78643K 2345 0 subproc 104 6K 6K 78643K 494 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1664 0 in_multi 99 6K 7K 78643K 682 0 ether_multi 1 0K 0K 78643K 90 0 mrt 1 0K 0K 78643K 2 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 3545 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 457 96K 543K 78643K 185378 0 UVM aobj 131 6K 6K 78643K 148 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 540 0 NDP 11 0K 2K 78643K 117 0 temp 124 5866K 5946K 78643K 48343 0 kqueue 12 18K 26K 78643K 1464 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 2949 0 2946 44 43 1 5 0 8 0 rtentry 112 480 0 363 4 0 4 4 0 8 0 unpcb 144 13980 0 13967 133 130 3 8 0 8 2 syncache 296 182 0 182 35 35 0 1 0 8 0 tcpqe 32 144 0 144 24 24 0 1 0 8 0 tcpcb 776 7861 0 7853 178 170 8 14 0 8 6 arp 120 87 0 66 1 0 1 1 0 8 0 ipq 40 20 0 20 10 10 0 1 0 8 0 ipqe 40 168 0 168 10 10 0 1 0 8 0 inpcb 368 14599 0 14583 209 201 8 14 0 8 6 nd6 136 144 0 116 4 2 2 2 0 8 0 kcovpl 48 38 0 30 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1901 0 1431 37 7 30 31 0 8 0 art_table 32 1902 0 1431 4 0 4 4 0 8 0 art_node 16 479 0 372 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 4812 0 4802 1 0 1 1 0 8 0 shmpl 112 145 0 17 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 28938 0 27475 92 0 92 92 0 8 0 ffsino 272 28938 0 27475 98 0 98 98 0 8 0 nchpl 144 56424 0 54784 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 193009 0 193008 5 4 1 2 0 8 0 percpumem 16 73 0 30 1 0 1 1 0 8 0 kstatmem 264 82 0 60 2 0 2 2 0 8 0 scxspl 216 167565 0 167565 64 63 1 8 0 8 1 plimitpl 152 3751 0 3728 34 32 2 2 0 8 1 sigapl 424 18735 0 18684 7 0 7 7 0 8 0 futexpl 64 173189 0 173189 4 3 1 1 0 8 1 knotepl 120 733 0 0 8 0 8 8 0 8 0 kqueuepl 216 4954 0 4946 76 75 1 6 0 8 0 pipepl 320 3523 0 3495 98 92 6 9 0 8 3 fdescpl 496 18717 0 18684 7 2 5 6 0 8 0 filepl 152 134981 0 134743 190 178 12 21 0 8 2 lockfpl 104 2952 0 2950 5 4 1 2 0 8 0 lockfspl 48 565 0 563 1 0 1 1 0 8 0 sessionpl 144 53 0 37 1 0 1 1 0 8 0 pgrppl 48 3601 0 3585 1 0 1 1 0 8 0 ucredpl 104 21069 0 21051 1 0 1 1 0 8 0 zombiepl 144 18684 0 18684 1 0 1 1 0 8 1 processpl 1072 18735 0 18684 5 1 4 5 0 8 0 procpl 696 52576 0 52507 27 19 8 10 0 8 0 sosppl 168 342 0 342 28 27 1 1 0 8 1 sockpl 488 32014 0 31987 607 594 13 29 0 8 8 mcl64k 65536 41 0 0 4 1 3 3 0 8 0 mcl16k 16384 46 0 0 5 2 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 49 0 0 3 0 3 3 0 8 0 mcl4k 4096 41 0 0 3 0 3 3 0 8 0 mcl2k2 2112 31 0 0 3 0 3 3 0 8 0 mcl2k 2048 662 0 0 70 43 27 70 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 1986 0 0 74 0 74 74 0 8 0 bufpl 288 36717 0 30399 452 0 452 452 0 8 0 anonpl 24 1935534 0 1921891 231 124 107 128 0 186 0 amapchunkpl 152 779011 0 778151 2385 2345 40 2233 0 158 1 amappl16 200 42796 0 42419 268 246 22 39 0 8 0 amappl15 192 16 0 15 2 1 1 1 0 8 0 amappl14 184 280 0 264 2 1 1 2 0 8 0 amappl13 176 71 0 71 10 10 0 1 0 8 0 amappl12 168 19784 0 19750 2 0 2 2 0 8 0 amappl11 160 84 0 73 1 0 1 1 0 8 0 amappl10 152 95 0 78 1 0 1 1 0 8 0 amappl9 144 313 0 313 19 18 1 2 0 8 1 amappl8 136 997 0 795 9 1 8 8 0 8 0 amappl7 128 175 0 155 1 0 1 1 0 8 0 amappl6 120 682 0 657 2 1 1 2 0 8 0 amappl5 112 612 0 606 1 0 1 1 0 8 0 amappl4 104 1566 0 1524 2 0 2 2 0 8 0 amappl3 96 114240 0 114157 17 14 3 4 0 8 0 amappl2 88 20121 0 20049 4 2 2 3 0 8 0 amappl1 80 74890 0 74380 23 11 12 22 0 8 0 amappl 88 183998 0 183749 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 72 147 0 17 3 0 3 3 0 8 0 uaddrrnd 24 18717 0 18684 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 18717 0 18684 1 0 1 1 0 8 0 vmmpekpl 168 149894 0 149838 4 0 4 4 0 8 0 vmmpepl 168 1107357 0 1104871 320 192 128 138 0 357 0 vmsppl 464 18716 0 18684 7 2 5 6 0 8 0 rwobjpl 56 279604 0 272036 119 8 111 112 0 8 0 pdppl 4096 37442 0 37368 607 525 82 94 0 8 8 pvpl 32 5507835 0 5488171 639 457 182 362 0 265 0 pmappl 248 18716 0 18684 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1666 0 785 27 0 27 27 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(ffffffff82785107) at panic+0x17b sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002e4155d8) at vop_generic_badop+0x1f sys/kern/vfs_default.c:133 VOP_STRATEGY(fffffd807c97c6c8,fffffd8063f474b8) at VOP_STRATEGY+0x9f sys/kern/vfs_vops.c:628 bwrite(fffffd8063f474b8) at bwrite+0x1f4 sys/kern/vfs_bio.c:760 VOP_BWRITE(fffffd8063f474b8) at VOP_BWRITE+0x4e sys/kern/vfs_vops.c:640 ufs_mkdir(ffff80002e415870) at ufs_mkdir+0x6c4 sys/ufs/ufs/ufs_vnops.c:1235 VOP_MKDIR(fffffd806690b028,ffff80002e4159d0,ffff80002e415a00,ffff80002e415900) at VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 domkdirat(ffff80002126eb18,ffffff9c,7aa3df7fbbb0,1ff) at domkdirat+0x125 sys/kern/vfs_syscalls.c:3074 syscall(ffff80002e415b80) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002e415b80) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7aa3df7fbc20, count: -11 ddb{0}> machine ddbcpu 1