panic: vop_generic_badpoapn icStopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 306719 48021 32767 0x10 0 1 syz-executor.0 *490293 38300 32767 0x10 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82592efc) at panic+0x177 sys/kern/subr_prf.c:202 vop_generic_badop(ffff80002c983c00) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_READLINK(fffffd8077836410,ffff80002c983c70,fffffd807f7d7660) at VOP_READLINK+0xb6 sys/kern/vfs_vops.c:476 namei(ffff80002c983d18) at namei+0x48a sys/kern/vfs_lookup.c:290 sys_unveil(ffff8000fffef260,ffff80002c983e38,ffff80002c983e90) at sys_unveil+0x22d sys/kern/vfs_syscalls.c:1005 syscall(ffff80002c983f00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c983f00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x52fe6e06070, count: 7 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 678 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82592efc) at panic+0x177 sys/kern/subr_prf.c:202 vop_generic_badop(ffff80002c983c00) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_READLINK(fffffd8077836410,ffff80002c983c70,fffffd807f7d7660) at VOP_READLINK+0xb6 sys/kern/vfs_vops.c:476 namei(ffff80002c983d18) at namei+0x48a sys/kern/vfs_lookup.c:290 sys_unveil(ffff8000fffef260,ffff80002c983e38,ffff80002c983e90) at sys_unveil+0x22d sys/kern/vfs_syscalls.c:1005 syscall(ffff80002c983f00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c983f00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x52fe6e06070, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002c983b30 rbx 0xffffffff82979c5f cpu_info_full_primary+0x2c5f rdx 0xffff800000bcf900 rcx 0 rax 0xffff8000fffef260 r8 0x101010101010101 r9 0x8080808080808080 r10 0xcab54ba43c3c9ab8 r11 0xdc9878a9263f8736 r12 0xffffffff82979a60 cpu_info_full_primary+0x2a60 r13 0 r14 0 r15 0x1 rip 0xffffffff81f06308 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002c983b20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=490293 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffeea80,0xffff80002a726fe0 process=0xffff800027b054e0 user=0xffff80002c97e000, vmspace=0xfffffd806ef72e68 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 25490 370970 82714 32767 2 0x10 syz-executor.3 71737 139773 65845 32767 2 0x10 syz-executor.6 48021 306719 82368 32767 7 0x10 syz-executor.0 38300 231184 67726 32767 2 0x10 syz-executor.1 *38300 490293 67726 32767 7 0x4000010 syz-executor.1 2110 171620 13502 32767 2 0x10 syz-executor.2 88298 67759 2229 32767 2 0x10 syz-executor.4 88298 327133 2229 32767 3 0x4000090 fsleep syz-executor.4 10278 211993 91167 32767 2 0x10 syz-executor.5 10278 269303 91167 32767 3 0x4000090 nanoslp syz-executor.5 10278 416802 91167 32767 2 0x4000010 syz-executor.5 67726 147959 8367 32767 3 0x90 nanoslp syz-executor.1 8367 329407 40903 0 3 0x82 wait syz-executor.1 82714 79412 91313 32767 3 0x90 nanoslp syz-executor.3 91313 430443 40903 0 3 0x82 wait syz-executor.3 83269 64070 0 0 3 0x14200 bored sosplice 65845 240107 41626 32767 3 0x90 nanoslp syz-executor.6 41626 284716 40903 0 3 0x82 wait syz-executor.6 32830 312914 63948 32767 2 0x10 syz-executor.7 91167 145357 9320 32767 3 0x90 nanoslp syz-executor.5 63948 63098 40903 0 3 0x82 wait syz-executor.7 2229 346820 3331 32767 3 0x90 nanoslp syz-executor.4 9320 263449 40903 0 3 0x82 wait syz-executor.5 13502 448133 6606 32767 2 0x490 syz-executor.2 3331 493661 40903 0 3 0x82 wait syz-executor.4 6606 223337 40903 0 3 0x82 wait syz-executor.2 82368 108389 19810 32767 3 0x90 nanoslp syz-executor.0 19810 113721 40903 0 3 0x82 wait syz-executor.0 40903 296476 33277 0 3 0x82 thrsleep syz-fuzzer 40903 379358 33277 0 2 0x4000482 syz-fuzzer 40903 207526 33277 0 3 0x4000082 thrsleep syz-fuzzer 40903 472466 33277 0 3 0x4000082 kqread syz-fuzzer 40903 384786 33277 0 3 0x4000082 thrsleep syz-fuzzer 40903 50629 33277 0 3 0x4000082 thrsleep syz-fuzzer 40903 113695 33277 0 3 0x4000082 thrsleep syz-fuzzer 40903 153864 33277 0 3 0x4000082 thrsleep syz-fuzzer 40903 508072 33277 0 3 0x4000082 thrsleep syz-fuzzer 33277 358445 10860 0 3 0x10008a sigsusp ksh 10860 342235 3176 0 3 0x9a kqread sshd 50384 250671 1 0 3 0x100083 ttyin getty 3176 65411 1 0 3 0x88 kqread sshd 52146 440525 55533 73 3 0x1100090 kqread syslogd 55533 250028 1 0 3 0x100082 netio syslogd 83656 450270 1 0 3 0x100080 kqread resolvd 19150 378863 59389 77 3 0x100092 kqread dhcpleased 82642 263404 59389 77 3 0x100092 kqread dhcpleased 59389 135224 1 0 3 0x80 kqread dhcpleased 35516 11080 0 0 3 0x14200 bored smr 97535 418944 0 0 2 0x14200 zerothread 80061 203864 0 0 3 0x14200 aiodoned aiodoned 52389 186716 0 0 3 0x14200 syncer update 45431 353212 0 0 3 0x14200 cleaner cleaner 98772 80244 0 0 3 0x14200 reaper reaper 37254 251617 0 0 3 0x14200 pgdaemon pagedaemon 92690 174357 0 0 3 0x14200 bored viomb 28835 352744 0 0 3 0x40014200 acpi0 acpi0 27054 185339 0 0 3 0x40014200 idle1 41504 147781 0 0 3 0x14200 bored softnet 39579 382507 0 0 3 0x14200 bored softnet 72814 126476 0 0 3 0x14200 bored softnet 90401 25453 0 0 3 0x14200 bored softnet 28979 129930 0 0 3 0x14200 bored systqmp 77741 24901 0 0 3 0x14200 bored systq 46839 83963 0 0 2 0x40014200 softclock 146 339547 0 0 3 0x40014200 idle0 1 132860 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 38300 (syz-executor.1) thread 0xffff8000fffef260 (490293) exclusive rrwlock inode r = 0 (0xfffffd806824f918) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:678 #6 ufs_ihashget+0x121 sys/ufs/ufs/ufs_ihash.c:119 #7 ffs_vget+0x7c sys/ufs/ffs/ffs_vfsops.c:1318 #8 ufs_lookup+0x122c sys/ufs/ufs/ufs_lookup.c:582 #9 VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:561 #11 namei+0x36a sys/kern/vfs_lookup.c:245 #12 sys_unveil+0x22d sys/kern/vfs_syscalls.c:1005 #13 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #13 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #14 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b7ba90) #0 witness_lock+0x44d #1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10219 6414K 6420K 78643K 11323 0 pcb 13 16K 18K 78643K 19 0 rtable 240 6K 7K 78643K 580 0 ifaddr 81 16K 16K 78643K 110 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 64 0 ioctlops 0 0K 2K 78643K 125 0 iov 0 0K 24K 78643K 566 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 2326 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 34 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1270 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 25 93K 117K 78643K 4058 0 sigio 0 0K 0K 78643K 14 0 proc 61 91K 115K 78643K 858 0 subproc 104 6K 6K 78643K 156 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 815 0 in_multi 99 6K 6K 78643K 179 0 ether_multi 1 0K 0K 78643K 7 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 313 1394K 1394K 78643K 313 0 exec 0 0K 2K 78643K 1096 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 7 26K 26K 78643K 7 0 UVM amap 259 84K 99K 78643K 25736 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 43 0 NDP 11 0K 2K 78643K 39 0 temp 124 4730K 4794K 78643K 13762 0 kqueue 12 18K 24K 78643K 540 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 120 299 0 296 4 3 1 3 0 8 0 rtentry 112 160 0 47 4 0 4 4 0 8 0 unpcb 136 2349 0 2336 17 13 4 6 0 8 3 syncache 296 60 0 60 6 5 1 1 0 8 1 tcpqe 32 52 0 52 5 5 0 1 0 8 0 tcpcb 736 7238 0 7223 72 66 6 22 0 8 0 arp 120 27 0 8 1 0 1 1 0 8 0 inpcb 312 10640 0 10624 53 49 4 17 0 8 0 nd6 48 40 0 14 1 0 1 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 664 0 191 31 1 30 30 0 8 0 art_table 32 665 0 191 4 0 4 4 0 8 0 art_node 16 159 0 56 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 1 0 1 0 8 0 semapl 112 1268 0 1258 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6979 0 5541 91 0 91 91 0 8 0 ffsino 272 6979 0 5541 97 0 97 97 0 8 0 nchpl 144 12546 0 10903 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 42718 0 42716 2 1 1 2 0 8 0 percpumem 16 44 0 4 1 0 1 1 0 8 0 kstatmem 264 30 0 8 2 0 2 2 0 8 0 scxspl 216 33898 0 33898 16 15 1 8 0 8 1 plimitpl 152 819 0 797 4 3 1 2 0 8 0 sigapl 424 4333 0 4279 7 0 7 7 0 8 0 futexpl 64 41790 0 41789 1 0 1 1 0 8 0 knotepl 120 551 0 0 17 0 17 17 0 8 0 kqueuepl 216 1419 0 1411 22 17 5 5 0 8 4 pipepl 336 901 0 873 22 19 3 8 0 8 0 fdescpl 496 4315 0 4279 7 1 6 6 0 8 0 filepl 152 34516 0 34281 29 16 13 19 0 8 3 lockfpl 104 397 0 395 1 0 1 1 0 8 0 lockfspl 48 113 0 111 1 0 1 1 0 8 0 sessionpl 144 27 0 11 1 0 1 1 0 8 0 pgrppl 48 1311 0 1295 1 0 1 1 0 8 0 ucredpl 96 5632 0 5614 1 0 1 1 0 8 0 zombiepl 144 4279 0 4279 1 0 1 1 0 8 1 processpl 1064 4333 0 4279 5 1 4 5 0 8 0 procpl 672 12039 0 11973 11 3 8 8 0 8 1 sosppl 168 250 0 250 1 0 1 1 0 8 1 sockpl 480 13341 0 13312 162 146 16 29 0 8 9 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 15 0 0 2 0 2 2 0 8 0 mcl12k 12288 24 0 0 2 0 2 2 0 8 0 mcl9k 9216 12 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 21 0 0 3 0 3 3 0 8 0 mcl2k2 2112 60 0 0 4 0 4 4 0 8 1 mcl2k 2048 156 0 0 20 0 20 20 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 410 0 0 22 0 22 22 0 8 0 bufpl 288 9594 0 3266 453 0 453 453 0 8 0 anonpl 24 882626 0 870580 128 41 87 102 0 186 0 amapchunkpl 152 75448 0 74857 57 29 28 40 0 158 1 amappl16 200 14307 0 13961 61 42 19 31 0 8 0 amappl15 192 1205 0 1201 2 1 1 1 0 8 0 amappl14 184 829 0 823 1 0 1 1 0 8 0 amappl13 176 1346 0 1340 1 0 1 1 0 8 0 amappl12 168 4 0 3 2 1 1 1 0 8 0 amappl11 160 971 0 949 2 1 1 2 0 8 0 amappl10 152 505 0 500 1 0 1 1 0 8 0 amappl9 144 522 0 519 1 0 1 1 0 8 0 amappl8 136 712 0 635 3 0 3 3 0 8 0 amappl7 128 136 0 126 1 0 1 1 0 8 0 amappl6 120 258 0 241 2 1 1 2 0 8 0 amappl5 112 3540 0 3519 1 0 1 1 0 8 0 amappl4 104 2563 0 2529 2 0 2 2 0 8 0 amappl3 96 12790 0 12738 2 0 2 2 0 8 0 amappl2 88 6045 0 5973 3 1 2 3 0 8 0 amappl1 80 104533 0 103851 20 4 16 19 0 8 0 amappl 88 25027 0 24860 6 1 5 5 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 4315 0 4279 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4315 0 4279 1 0 1 1 0 8 0 vmmpekpl 168 38272 0 38214 3 0 3 3 0 8 0 vmmpepl 168 425345 0 422660 160 33 127 134 0 357 5 vmsppl 368 4314 0 4279 4 0 4 4 0 8 0 rwobjpl 56 113627 0 106262 107 1 106 107 0 8 0 pdppl 4096 8637 0 8558 153 72 81 93 0 8 2 pvpl 32 1726794 0 1709700 266 108 158 241 0 265 2 pmappl 248 4314 0 4279 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1039 0 211 25 0 25 25 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(ffffffff82592efc) at panic+0x177 sys/kern/subr_prf.c:202 vop_generic_badop(ffff80002c983c00) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_READLINK(fffffd8077836410,ffff80002c983c70,fffffd807f7d7660) at VOP_READLINK+0xb6 sys/kern/vfs_vops.c:476 namei(ffff80002c983d18) at namei+0x48a sys/kern/vfs_lookup.c:290 sys_unveil(ffff8000fffef260,ffff80002c983e38,ffff80002c983e90) at sys_unveil+0x22d sys/kern/vfs_syscalls.c:1005 syscall(ffff80002c983f00) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002c983f00) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x52fe6e06070, count: -8 ddb{0}> machine ddbcpu 1