panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_unveil.c", line 188 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bd0f8) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83076404,ffffffff8304895b,bc,ffffffff82ffb8e3) at __assert+0x29 unveil_destroy(ffff8000ffff5e10) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000360171d8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000360171d8,ffff80002a49d380,ffff80002a49d2d0) at sys_exit+0x1a syscall(ffff80002a49d380) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70e02da51840, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_unveil.c", line 188 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bd0f8) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83076404,ffffffff8304895b,bc,ffffffff82ffb8e3) at __assert+0x29 unveil_destroy(ffff8000ffff5e10) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000360171d8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000360171d8,ffff80002a49d380,ffff80002a49d2d0) at sys_exit+0x1a syscall(ffff80002a49d380) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70e02da51840, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a49d0d0 rbx 0xffff8000ffff5e10 rdx 0 rcx 0 rax 0xffff8000360171d8 r8 0 r9 0x8080808080808080 r10 0xfe3eb195a76cc5ba r11 0xa4fda150e3c385e8 r12 0 r13 0x2 r14 0 r15 0x1 rip 0xffffffff822483c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a49d0c0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=461455 pid=55218 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000360171d8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003765a030,0xffff800036016f60 process=0xffff8000ffff5e10 user=0xffff80002a498000, vmspace=0xfffffd806c218590 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 39898 319537 52251 0 2 0 syz-executor 39898 440355 52251 0 3 0x4000080 fsleep syz-executor 52131 419495 44838 0 2 0x4000000 syz-executor 52131 420645 44838 0 3 0x4000080 rest syz-executor 82131 326562 40714 0 2 0 syz-executor 82131 77176 40714 0 3 0x4000080 fsleep syz-executor 4386 53723 92138 0 3 0 vmmaplk syz-executor 4386 94211 92138 0 2 0x4000000 syz-executor 94973 271079 1 0 3 0x100083 ttyin getty 70613 405037 0 0 3 0x14200 acct acct 14535 272024 0 0 3 0x14200 bored sosplice 65549 20611 55664 0 2 0x482 syz-executor 40714 272827 55664 0 2 0x482 syz-executor 92138 350891 55664 0 2 0x482 syz-executor 7661 374035 55664 0 2 0x2 syz-executor 44838 361508 55664 0 2 0x482 syz-executor 99694 439248 55664 0 3 0x82 wait syz-executor 52251 120939 55664 0 2 0x482 syz-executor 21605 313400 55664 0 2 0x2 syz-executor 55664 148494 37349 0 3 0x82 kqread syz-executor 37349 87968 97556 0 3 0x10008a sigsusp ksh 97556 422196 5714 0 3 0x98 kqread sshd-session 5714 41612 66429 0 3 0x92 kqread sshd-session 66429 347285 1 0 3 0x88 kqread sshd 76783 179850 801 73 3 0x1100090 kqread syslogd 801 523554 1 0 3 0x100082 sbwait syslogd 87702 72582 1 0 3 0x100080 kqread resolvd 36101 354649 92634 77 3 0x100092 kqread dhcpleased 19645 30824 92634 77 3 0x100092 kqread dhcpleased 92634 424582 1 0 3 0x80 kqread dhcpleased 29692 41437 0 0 3 0x14200 bored smr 16166 331904 0 0 2 0x14200 zerothread 98845 63390 0 0 3 0x14200 aiodoned aiodoned 30093 230255 0 0 3 0x14200 syncer update 68696 233674 0 0 3 0x14200 cleaner cleaner 48597 200110 0 0 2 0x14200 reaper 31973 156467 0 0 3 0x14200 pgdaemon pagedaemon 89934 110646 0 0 3 0x14200 bored viomb 75887 28304 0 0 3 0x40014200 acpi0 acpi0 92038 184145 0 0 3 0x14200 bored softnet3 11855 515795 0 0 3 0x14200 bored softnet2 65025 102316 0 0 3 0x14200 bored softnet1 26666 198230 0 0 3 0x14200 bored softnet0 56604 220421 0 0 3 0x14200 bored systqmp 24121 233822 0 0 3 0x14200 bored systq 69714 269840 0 0 2 0x40014200 softclock 94614 511296 0 0 3 0x40014200 idle0 1 401878 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10174 11038K 11500K 166960K 12481 0 pcb 17 14K 16K 166960K 375 0 rtable 212 9K 9K 166960K 507 0 pf 32 13K 17K 166960K 71 0 ifaddr 38 6K 7K 166960K 57 0 ifgroup 46 2K 2K 166960K 71 0 sysctl 3 0K 0K 166960K 3 0 counters 29 17K 17K 166960K 38 0 ioctlops 0 0K 4K 166960K 155 0 iov 0 0K 32K 166960K 160 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1426 90K 90K 166960K 2093 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 75 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 16 57K 93K 166960K 959 0 sigio 0 0K 0K 166960K 24 0 proc 64 75K 116K 166960K 584 0 subproc 104 6K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 357 0 in_multi 88 6K 7K 166960K 131 0 ether_multi 1 0K 0K 166960K 9 0 mrt 2 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 472 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 221 72K 82K 166960K 10732 0 UVM aobj 83 3K 3K 166960K 88 0 pinsyscall 38 76K 98K 166960K 1986 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 51 0 NDP 10 0K 2K 166960K 36 0 temp 75 6820K 6912K 166960K 36404 0 kqueue 15 24K 30K 166960K 184 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 105 0 102 1 0 1 1 0 8 0 rtentry 112 157 0 65 4 0 4 4 0 8 0 unpcb 144 785 0 770 2 0 2 2 0 8 1 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 808 327 0 323 12 7 5 8 0 8 4 arp 88 19 0 2 1 0 1 1 0 8 0 ipq 40 5 0 4 1 0 1 1 0 8 0 ipqe 40 9 0 8 1 0 1 1 0 8 0 inpcb 336 1352 0 1215 28 11 17 17 0 8 5 nd6 104 30 0 6 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 6 0 6 2 1 1 1 0 8 1 pfrktable 1344 5 0 2 1 0 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstkey 128 4 0 4 1 0 1 1 0 8 1 pfstate 344 2 0 2 1 0 1 1 0 8 1 pfrule 1344 13 0 11 2 1 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 524 0 97 29 1 28 29 0 8 1 art_table 32 526 0 97 4 0 4 4 0 8 0 art_node 16 120 0 38 1 0 1 1 0 8 0 sysvmsgpl 40 75 0 72 1 0 1 1 0 8 0 semapl 112 71 0 61 1 0 1 1 0 8 0 shmpl 112 85 0 5 3 0 3 3 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3147 0 1653 95 0 95 95 0 8 0 ffsino 240 3147 0 1653 89 0 89 89 0 8 0 nchpl 144 4571 0 2893 63 0 63 63 0 8 0 uvmvnodes 80 3651 0 0 75 0 75 75 0 8 0 vnodes 216 3651 0 0 203 0 203 203 0 8 0 namei 1024 15417 0 15417 3 1 2 2 0 8 2 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 38 0 18 2 0 2 2 0 8 0 scxspl 216 12982 0 12982 10 2 8 8 1 8 8 plimitpl 152 296 0 278 1 0 1 1 0 8 0 sigapl 424 1242 0 1195 6 0 6 6 0 8 0 futexpl 64 13769 0 13767 1 0 1 1 0 8 0 knotepl 120 51254 0 51201 36 26 10 17 0 8 8 kqueuepl 184 277 0 266 1 0 1 1 0 8 0 pipepl 288 234 0 207 6 1 5 5 0 8 3 fdescpl 432 1223 0 1195 5 1 4 5 0 8 0 filepl 120 7944 0 7570 23 9 14 17 0 8 0 lockfpl 104 352 0 350 2 1 1 2 0 8 0 lockfspl 48 92 0 90 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 46 0 30 1 0 1 1 0 8 0 ucredpl 104 1236 0 1223 1 0 1 1 0 8 0 zombiepl 144 1645 0 1643 2 1 1 1 0 8 0 processpl 1096 1242 0 1195 4 0 4 4 0 8 0 procpl 648 2656 0 2602 7 1 6 6 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 504 2258 0 2103 45 17 28 28 0 8 7 mcl64k 65536 12 0 12 2 1 1 1 0 8 1 mcl16k 16384 4 0 4 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 2 1 1 1 0 8 1 mcl8k 8192 15 0 15 2 1 1 1 0 8 1 mcl4k 4096 3776 0 3725 19 11 8 18 0 8 1 mcl2k2 2112 3 0 3 2 1 1 1 0 8 1 mcl2k 2048 963 0 956 4 2 2 3 0 8 0 mtagpl 96 131 0 7 4 0 4 4 0 8 0 mbufpl 256 14930 0 14670 18 0 18 18 0 8 0 bufpl 280 4814 0 98 337 0 337 337 0 8 0 anonpl 24 205264 0 199089 59 2 57 57 0 187 19 amapchunkpl 152 35242 0 34754 40 8 32 32 0 158 8 amappl16 200 4255 0 4060 17 6 11 14 0 8 0 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 109 0 99 1 0 1 1 0 8 0 amappl13 176 7 0 6 1 0 1 1 0 8 0 amappl12 168 1831 0 1803 3 1 2 3 0 8 0 amappl11 160 47 0 37 1 0 1 1 0 8 0 amappl10 152 14 0 14 2 1 1 1 0 8 1 amappl9 144 136 0 136 1 1 0 1 0 8 0 amappl8 136 29 0 27 1 0 1 1 0 8 0 amappl7 128 97 0 87 1 0 1 1 0 8 0 amappl6 120 167 0 165 1 0 1 1 0 8 0 amappl5 112 140 0 132 1 0 1 1 0 8 0 amappl4 104 284 0 271 1 0 1 1 0 8 0 amappl3 96 6575 0 6483 3 0 3 3 0 8 0 amappl2 88 1488 0 1411 2 0 2 2 0 8 0 amappl1 80 9962 0 9447 13 1 12 13 0 8 0 amappl 88 10313 0 10146 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 7 0 7 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 87 0 5 2 0 2 2 0 8 0 uaddrrnd 24 1223 0 1194 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1223 0 1194 1 0 1 1 0 8 0 vmmpekpl 168 10743 0 10707 3 0 3 3 0 8 0 vmmpepl 168 79584 0 77695 90 2 88 88 0 357 3 vmsppl 352 1222 0 1194 4 1 3 4 0 8 0 rwobjpl 24 27182 0 22430 29 0 29 29 0 8 0 pdppl 4096 2452 0 2388 106 40 66 80 0 8 2 pvpl 32 528134 0 516675 131 5 126 126 0 265 31 pmappl 216 1222 0 1194 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 471 0 96 12 1 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bd0f8) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83076404,ffffffff8304895b,bc,ffffffff82ffb8e3) at __assert+0x29 unveil_destroy(ffff8000ffff5e10) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000360171d8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000360171d8,ffff80002a49d380,ffff80002a49d2d0) at sys_exit+0x1a syscall(ffff80002a49d380) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70e02da51840, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bd0f8) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83076404,ffffffff8304895b,bc,ffffffff82ffb8e3) at __assert+0x29 unveil_destroy(ffff8000ffff5e10) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000360171d8,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000360171d8,ffff80002a49d380,ffff80002a49d2d0) at sys_exit+0x1a syscall(ffff80002a49d380) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70e02da51840, count: -8