panic: vop_generic_bpaandiocp: Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 333271 90875 32767 0x10 0 1 syz-executor.2 *344657 62230 32767 0x10 0x4000000 0 syz-executor.7 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82740948) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002ca259c0) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_READLINK(fffffd80651a0888,ffff80002ca25a30,fffffd807f7d73a8) at VOP_READLINK+0xb6 sys/kern/vfs_vops.c:460 namei(ffff80002ca25ad8) at namei+0x67a sys/kern/vfs_lookup.c:295 sys_unveil(ffff8000211e9608,ffff80002ca25bf8,ffff80002ca25c40) at sys_unveil+0x22d sys/kern/vfs_syscalls.c:1001 syscall(ffff80002ca25cc0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002ca25cc0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4423db80310, 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 674 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82740948) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002ca259c0) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_READLINK(fffffd80651a0888,ffff80002ca25a30,fffffd807f7d73a8) at VOP_READLINK+0xb6 sys/kern/vfs_vops.c:460 namei(ffff80002ca25ad8) at namei+0x67a sys/kern/vfs_lookup.c:295 sys_unveil(ffff8000211e9608,ffff80002ca25bf8,ffff80002ca25c40) at sys_unveil+0x22d sys/kern/vfs_syscalls.c:1001 syscall(ffff80002ca25cc0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002ca25cc0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4423db80310, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002ca258f0 rbx 0xffffffff82bc2b8f cpu_info_full_primary+0x2b8f rdx 0 rcx 0 rax 0xffff8000211e9608 r8 0x101010101010101 r9 0x8080808080808080 r10 0x873d94c8ec1824a6 r11 0x4018fdb4db1e5f44 r12 0xffffffff82bc2990 cpu_info_full_primary+0x2990 r13 0 r14 0 r15 0x1 rip 0xffffffff818c3858 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002ca258e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.7) pid=344657 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff8000212af088,0xffff8000212afb78 process=0xffff8000295a6198 user=0xffff80002ca20000, vmspace=0xfffffd8063cdea50 estcpu=25, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90875 333271 58181 32767 7 0x10 syz-executor.2 65790 398691 14485 32767 2 0x10 syz-executor.5 21204 523876 89263 32767 2 0x10 syz-executor.6 62230 234685 77247 32767 2 0x10 syz-executor.7 *62230 344657 77247 32767 7 0x4000010 syz-executor.7 90426 78370 0 0 3 0x14200 bored sosplice 89263 441986 4059 32767 2 0x490 syz-executor.6 4059 193957 87093 0 3 0x82 wait syz-executor.6 77247 10756 49912 32767 3 0x90 nanoslp syz-executor.7 49912 115029 87093 0 3 0x82 wait syz-executor.7 89067 174346 84045 32767 2 0x10 syz-executor.4 84045 160700 87093 0 3 0x82 wait syz-executor.4 14485 510427 57027 32767 3 0x90 nanoslp syz-executor.5 89657 69858 47327 32767 2 0x490 syz-executor.3 57027 104616 87093 0 3 0x82 wait syz-executor.5 47327 67861 87093 0 3 0x82 wait syz-executor.3 58181 511285 53745 32767 3 0x90 nanoslp syz-executor.2 62763 328108 65609 32767 3 0x90 nanoslp syz-executor.1 53745 333752 87093 0 3 0x82 wait syz-executor.2 96431 493177 63871 32767 2 0x10 syz-executor.0 65609 280882 87093 0 3 0x82 wait syz-executor.1 63871 195163 87093 0 3 0x82 wait syz-executor.0 87093 274036 15135 0 3 0x82 wait syz-fuzzer 87093 130685 15135 0 3 0x4000082 thrsleep syz-fuzzer 87093 83074 15135 0 3 0x4000082 wait syz-fuzzer 87093 6067 15135 0 3 0x4000082 wait syz-fuzzer 87093 418443 15135 0 3 0x4000082 thrsleep syz-fuzzer 87093 269468 15135 0 3 0x4000082 wait syz-fuzzer 87093 111779 15135 0 3 0x4000082 wait syz-fuzzer 87093 506632 15135 0 3 0x4000082 wait syz-fuzzer 87093 455728 15135 0 3 0x4000082 wait syz-fuzzer 87093 464761 15135 0 3 0x4000082 thrsleep syz-fuzzer 87093 497183 15135 0 3 0x4000082 thrsleep syz-fuzzer 87093 271470 15135 0 3 0x4000082 kqread syz-fuzzer 87093 145760 15135 0 3 0x4000082 wait syz-fuzzer 87093 41312 15135 0 3 0x4000082 thrsleep syz-fuzzer 87093 462587 15135 0 3 0x4000082 thrsleep syz-fuzzer 15135 245532 25630 0 3 0x10008a sigsusp ksh 25630 69422 27707 0 3 0x9a kqread sshd 17330 472305 1 0 3 0x100083 ttyin getty 27707 154549 1 0 3 0x88 kqread sshd 81719 291233 79937 73 3 0x1100090 kqread syslogd 79937 477430 1 0 3 0x100082 netio syslogd 24690 182553 1 0 3 0x100080 kqread resolvd 44005 123548 49513 77 3 0x100092 kqread dhcpleased 18430 521019 49513 77 3 0x100092 kqread dhcpleased 49513 511159 1 0 3 0x80 kqread dhcpleased 47584 271453 0 0 3 0x14200 bored smr 66548 60268 0 0 2 0x14200 zerothread 63779 261762 0 0 3 0x14200 aiodoned aiodoned 83387 92605 0 0 3 0x14200 syncer update 1526 439262 0 0 3 0x14200 cleaner cleaner 93757 151880 0 0 3 0x14200 reaper reaper 51408 276074 0 0 3 0x14200 pgdaemon pagedaemon 17421 203876 0 0 3 0x14200 bored viomb 1993 332300 0 0 3 0x40014200 acpi0 acpi0 21802 372906 0 0 3 0x40014200 idle1 81112 142515 0 0 3 0x14200 bored softnet 80252 293598 0 0 3 0x14200 bored softnet 82265 200889 0 0 3 0x14200 bored softnet 44153 395287 0 0 3 0x14200 bored softnet 22469 30455 0 0 3 0x14200 bored systqmp 35621 387830 0 0 3 0x14200 bored systq 431 260131 0 0 3 0x40014200 bored softclock 56151 251898 0 0 3 0x40014200 idle0 1 509237 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 62230 (syz-executor.7) thread 0xffff8000211e9608 (344657) exclusive rrwlock inode r = 0 (0xfffffd806529c1b8) #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:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vget+0x1fc 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 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:566 #11 namei+0x55a sys/kern/vfs_lookup.c:250 #12 sys_unveil+0x22d sys/kern/vfs_syscalls.c:1001 #13 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #13 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #14 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82c2ca98) #0 witness_lock+0x44d #1 syscall+0x5cd mi_syscall sys/sys/syscall_mi.h:110 [inline] #1 syscall+0x5cd sys/arch/amd64/amd64/trap.c:625 #2 Xsyscall+0x128 Process 89067 (syz-executor.4) thread 0xffff80002123c5a0 (174346) exclusive rrwlock inode r = 0 (0xfffffd806859aa30) #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:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806859a810) #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:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #9 Xsyscall+0x128 Process 96431 (syz-executor.0) thread 0xffff80002121d330 (493177) exclusive rrwlock inode r = 0 (0xfffffd806859a2c0) #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:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8068e99a28) #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:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 6409K 6421K 78643K 11288 0 pcb 13 10K 12K 78643K 15 0 rtable 236 6K 6K 78643K 359 0 ifaddr 73 24K 24K 78643K 75 0 sysctl 2 0K 0K 78643K 2 0 counters 60 35K 35K 78643K 60 0 ioctlops 0 0K 2K 78643K 27 0 iov 0 0K 4K 78643K 28 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 1325 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 45 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 121K 78643K 602 0 sigio 0 0K 0K 78643K 32 0 proc 56 78K 103K 78643K 517 0 subproc 104 6K 6K 78643K 104 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 7 0 in_multi 99 6K 6K 78643K 101 0 ether_multi 1 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 387 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 288 79K 81K 78643K 5765 0 UVM aobj 85 3K 3K 78643K 85 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 6 0 NDP 11 0K 2K 78643K 27 0 temp 124 5778K 5842K 78643K 5031 0 kqueue 12 18K 36K 78643K 164 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 44 0 41 1 0 1 1 0 8 0 rtentry 112 112 0 1 4 0 4 4 0 8 0 unpcb 144 797 0 784 9 8 1 6 0 8 0 syncache 296 7 0 7 2 2 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 238 0 238 3 3 0 1 0 8 0 tcpcb 776 175 0 171 11 10 1 11 0 8 0 arp 120 18 0 0 1 0 1 1 0 8 0 inpcb 368 340 0 332 13 9 4 10 0 8 2 nd6 48 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 459 0 0 29 0 29 29 0 8 0 art_table 32 460 0 0 4 0 4 4 0 8 0 art_node 16 111 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 0 1 0 1 1 0 8 0 semapl 112 43 0 33 1 0 1 1 0 8 0 shmpl 112 82 0 0 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2071 0 639 90 0 90 90 0 8 0 ffsino 272 2071 0 639 96 0 96 96 0 8 0 nchpl 144 2923 0 1251 63 0 63 63 0 8 0 uvmvnodes 80 2184 0 0 45 0 45 45 0 8 0 vnodes 216 2184 0 0 122 0 122 122 0 8 0 namei 1024 10416 0 10411 2 1 1 2 0 8 0 percpumem 16 43 0 0 1 0 1 1 0 8 0 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 10020 0 10020 11 10 1 8 0 8 1 plimitpl 152 57 0 34 2 1 1 2 0 8 0 sigapl 424 895 0 842 7 0 7 7 0 8 0 futexpl 64 4151 0 4151 1 0 1 1 0 8 1 knotepl 120 139 0 0 5 1 4 5 0 8 0 kqueuepl 216 489 0 481 12 7 5 7 0 8 4 pipepl 320 171 0 143 3 0 3 3 0 8 0 fdescpl 496 877 0 844 7 1 6 6 0 8 0 filepl 152 4933 0 4700 23 10 13 20 0 8 4 lockfpl 104 20 0 18 1 0 1 1 0 8 0 lockfspl 48 10 0 8 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 47 0 31 1 0 1 1 0 8 0 ucredpl 104 540 0 522 1 0 1 1 0 8 0 zombiepl 144 844 0 842 1 0 1 1 0 8 0 processpl 1072 895 0 842 5 1 4 5 0 8 0 procpl 696 1790 0 1722 10 2 8 9 0 8 0 sosppl 168 21 0 21 1 1 0 1 0 8 0 sockpl 488 1196 0 1173 40 32 8 25 0 8 5 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 8 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 481 0 0 60 0 60 60 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 510 0 0 32 0 32 32 0 8 0 bufpl 288 4907 0 139 341 0 341 341 0 8 0 anonpl 24 218404 0 205460 108 15 93 97 0 186 4 amapchunkpl 152 15821 0 15156 31 1 30 31 0 158 0 amappl16 200 3570 0 3220 29 8 21 24 0 8 2 amappl15 192 13 0 12 1 0 1 1 0 8 0 amappl14 184 144 0 131 2 1 1 2 0 8 0 amappl13 176 9 0 9 1 1 0 1 0 8 0 amappl12 168 393 0 392 1 0 1 1 0 8 0 amappl11 160 47 0 36 1 0 1 1 0 8 0 amappl10 152 29 0 20 1 0 1 1 0 8 0 amappl9 144 966 0 965 2 1 1 1 0 8 0 amappl8 136 156 0 109 2 0 2 2 0 8 0 amappl7 128 149 0 126 2 0 2 2 0 8 0 amappl6 120 165 0 154 2 1 1 2 0 8 0 amappl5 112 124 0 118 1 0 1 1 0 8 0 amappl4 104 462 0 438 2 1 1 2 0 8 0 amappl3 96 2056 0 2007 2 0 2 2 0 8 0 amappl2 88 1266 0 1188 3 1 2 3 0 8 0 amappl1 80 22215 0 21523 26 8 18 26 0 8 0 amappl 88 5257 0 5078 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 84 0 0 2 0 2 2 0 8 0 uaddrrnd 24 877 0 844 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 877 0 844 1 0 1 1 0 8 0 vmmpekpl 168 12622 0 12569 3 0 3 3 0 8 0 vmmpepl 168 88824 0 86293 148 16 132 137 0 357 6 vmsppl 440 876 0 844 5 0 5 5 0 8 0 rwobjpl 56 28049 0 24404 54 1 53 53 0 8 0 pdppl 4096 1761 0 1688 141 60 81 93 0 8 8 pvpl 32 494445 0 475800 324 56 268 324 0 265 104 pmappl 248 876 0 844 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 817 0 72 22 0 22 22 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(ffffffff82740948) at panic+0x177 sys/kern/subr_prf.c:198 vop_generic_badop(ffff80002ca259c0) at vop_generic_badop+0x1b sys/kern/vfs_default.c:133 VOP_READLINK(fffffd80651a0888,ffff80002ca25a30,fffffd807f7d73a8) at VOP_READLINK+0xb6 sys/kern/vfs_vops.c:460 namei(ffff80002ca25ad8) at namei+0x67a sys/kern/vfs_lookup.c:295 sys_unveil(ffff8000211e9608,ffff80002ca25bf8,ffff80002ca25c40) at sys_unveil+0x22d sys/kern/vfs_syscalls.c:1001 syscall(ffff80002ca25cc0) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002ca25cc0) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4423db80310, count: -8 ddb{0}> machine ddbcpu 1