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+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82927b8e) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e10c6,ffffffff828b33eb,bc,ffffffff82866e64) at __assert+0x29 sys/kern/subr_prf.c:157 unveil_destroy(ffff800037836e38) at unveil_destroy+0x174 sys/kern/kern_unveil.c:188 exit1(ffff80002a682000,0,0,1) at exit1+0x3d6 sys/kern/kern_exit.c:218 sys_exit(ffff80002a682000,ffff800032979ec0,ffff800032979e10) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800032979ec0) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c33131d6e90, 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+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82927b8e) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e10c6,ffffffff828b33eb,bc,ffffffff82866e64) at __assert+0x29 sys/kern/subr_prf.c:157 unveil_destroy(ffff800037836e38) at unveil_destroy+0x174 sys/kern/kern_unveil.c:188 exit1(ffff80002a682000,0,0,1) at exit1+0x3d6 sys/kern/kern_exit.c:218 sys_exit(ffff80002a682000,ffff800032979ec0,ffff800032979e10) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800032979ec0) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c33131d6e90, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800032979c10 rbx 0xffff800037836e38 rdx 0 rcx 0 rax 0xffff80002a682000 r8 0 r9 0x8080808080808080 r10 0x6d05dd433d18cdff r11 0x2f0485d320ddbf10 r12 0 r13 0x2 r14 0 r15 0x1 rip 0xffffffff811a086c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800032979c00 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.3) tid=183159 pid=3216 tcnt=1 stat=onproc flags process=1008 proc=2000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a682000 forw=0xffffffffffffffff, list=0xffff80002a6a2aa0,0xffff80002a6832a8 process=0xffff800037836e38 user=0xffff800032974000, vmspace=0xfffffd80659102e0 estcpu=36, cpticks=20, pctcpu=0.3, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 62633 255539 0 0 3 0x14280 nfsidl nfsio 81879 448722 0 0 3 0x14280 nfsidl nfsio 72584 22409 0 0 3 0x14280 nfsidl nfsio 10979 409583 0 0 3 0x14280 nfsidl nfsio 54712 339047 0 0 3 0x14280 nfsidl nfsio 96178 290734 0 0 3 0x14280 nfsidl nfsio 29593 442752 13312 0 2 0 syz-executor.6 29593 278728 13312 0 3 0x4000080 fsleep syz-executor.6 29593 199646 13312 0 2 0x4000000 syz-executor.6 79058 211675 87509 0 2 0 syz-executor.4 79058 162108 87509 0 3 0x4000080 fsleep syz-executor.4 79058 160352 87509 0 2 0x4000000 syz-executor.4 7375 471643 64216 0 2 0 syz-executor.7 7375 128473 64216 0 3 0x4000080 fsleep syz-executor.7 7375 84442 64216 0 2 0x4000000 syz-executor.7 79734 49729 539 0 2 0x4081000 syz-executor.1 79734 139337 539 0 2 0x4081000 syz-executor.1 79734 413191 539 0 3 0x4003000 suspend syz-executor.1 27028 457826 57069 0 2 0x3 syz-executor.5 87509 514430 57069 0 2 0x482 syz-executor.4 13312 304364 57069 0 2 0x482 syz-executor.6 59414 250852 0 0 3 0x14200 acct acct 87856 322358 57069 0 2 0x2 syz-executor.2 64216 306519 57069 0 2 0x482 syz-executor.7 4728 40501 57069 0 2 0x2 syz-executor.0 1201 274882 57069 0 2 0x482 syz-executor.3 35329 22881 1 0 3 0x18100083 ttyin getty 539 379626 57069 0 2 0x482 syz-executor.1 32255 360993 0 0 3 0x14200 bored sosplice 57069 81980 45519 0 3 0x1a000082 wait syz-fuzzer 57069 288146 45519 0 2 0x1e000482 syz-fuzzer 57069 57693 45519 0 3 0x1e000082 kqread syz-fuzzer 57069 194784 45519 0 3 0x1e000082 thrsleep syz-fuzzer 57069 305564 45519 0 3 0x1e000082 wait syz-fuzzer 57069 381380 45519 0 3 0x1e000082 wait syz-fuzzer 57069 226686 45519 0 3 0x1e000082 wait syz-fuzzer 57069 518922 45519 0 3 0x1e000082 wait syz-fuzzer 57069 399373 45519 0 3 0x1e000082 wait syz-fuzzer 57069 13343 45519 0 3 0x1e000082 thrsleep syz-fuzzer 57069 355859 45519 0 3 0x1e000082 thrsleep syz-fuzzer 57069 478919 45519 0 3 0x1e000082 thrsleep syz-fuzzer 57069 227375 45519 0 3 0x1e000082 wait syz-fuzzer 57069 343570 45519 0 3 0x1e000082 wait syz-fuzzer 45519 221959 19230 0 3 0x810008a sigsusp ksh 19230 280461 14142 0 3 0x1800009a kqread sshd 14142 523248 1 0 3 0x18000088 kqread sshd 97373 244323 27715 73 2 0x19100010 syslogd 27715 36581 1 0 3 0x18100082 netio syslogd 49796 210024 1 0 3 0x18100080 kqread resolvd 84115 406330 65928 77 3 0x18100092 kqread dhcpleased 4323 64220 65928 77 3 0x18100092 kqread dhcpleased 65928 338210 1 0 3 0x18000080 kqread dhcpleased 43991 56753 0 0 3 0x14200 bored smr 89284 295013 0 0 2 0x14200 zerothread 35994 291758 0 0 3 0x14200 aiodoned aiodoned 22207 285352 0 0 3 0x14200 syncer update 12730 394341 0 0 3 0x14200 cleaner cleaner 177 257676 0 0 3 0x14200 reaper reaper 42139 455170 0 0 3 0x14200 pgdaemon pagedaemon 38645 339312 0 0 3 0x14200 bored viomb 76827 394846 0 0 3 0x40014200 acpi0 acpi0 75434 452018 0 0 3 0x14200 bored softnet3 13914 356143 0 0 3 0x14200 bored softnet2 79594 403253 0 0 3 0x14200 bored softnet1 48508 326763 0 0 3 0x14200 bored softnet0 30408 190336 0 0 3 0x14200 bored systqmp 60768 75785 0 0 3 0x14200 bored systq 24690 247896 0 0 3 0x40014200 tmoslp softclock 61168 521732 0 0 3 0x40014200 idle0 1 238741 0 0 3 0x8000082 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 10199 6402K 7247K 166960K 32067 0 pcb 15 20K 22K 166960K 513 0 rtable 176 9K 11K 166960K 2591 0 pf 29 8K 9K 166960K 217 0 ifaddr 34 10K 12K 166960K 262 0 ifgroup 50 2K 2K 166960K 362 0 sysctl 3 0K 2K 166960K 6 0 counters 30 17K 17K 166960K 117 0 ioctlops 0 0K 2K 166960K 347 0 iov 0 0K 24K 166960K 702 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1520 96K 96K 166960K 6538 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 71 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 120 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 73K 166960K 7197 0 sigio 0 0K 0K 166960K 261 0 proc 65 75K 75K 166960K 1961 0 subproc 104 6K 6K 166960K 624 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 392 0 in_multi 66 4K 7K 166960K 595 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 1649 0 pfkey data 0 0K 0K 166960K 7 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 405 291K 292K 166960K 66736 0 UVM aobj 131 4K 4K 166960K 140 0 pinsyscall 22 44K 100K 166960K 2551 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 200 0 NDP 11 0K 1K 166960K 197 0 temp 74 6804K 7148K 166960K 62970 0 kqueue 12 18K 37K 166960K 557 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 120 615 0 612 5 4 1 3 0 8 0 rtentry 112 820 0 742 4 1 3 4 0 8 0 unpcb 144 5619 0 5606 11 10 1 6 0 8 0 syncache 336 81 0 81 2 2 0 1 0 8 0 tcpqe 32 480 0 480 3 3 0 2 0 8 0 tcpcb 808 2290 0 2267 28 22 6 17 0 8 0 arp 88 183 0 170 1 0 1 1 0 8 0 ipq 40 11 0 11 1 1 0 1 0 8 0 ipqe 40 27 0 27 1 1 0 1 0 8 0 inpcb 360 5418 0 5392 35 28 7 18 0 8 1 nd6 104 149 0 134 1 0 1 1 0 8 0 pkpcb 40 33 0 33 2 2 0 1 0 8 0 kcovpl 48 48 0 40 1 0 1 1 0 8 0 ppxss 1072 25 0 25 2 2 0 1 0 8 0 art_heap8 4096 4 0 3 3 2 1 3 0 8 0 art_heap4 256 2456 0 2126 35 11 24 29 0 8 0 art_table 32 2460 0 2129 4 0 4 4 0 8 0 art_node 16 810 0 739 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 7 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 111 0 101 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 10426 0 8889 97 0 97 97 0 8 0 ffsino 240 10426 0 8889 91 0 91 91 0 8 0 nchpl 144 19788 0 18060 66 0 66 66 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 69602 0 69601 7 4 3 3 0 8 2 vcpupl 2048 34 0 0 5 0 5 5 0 8 0 vmpool 664 47 0 13 3 0 3 3 0 8 0 kstatmem 264 196 0 174 2 0 2 2 0 8 0 scxspl 216 61857 0 61857 12 11 1 8 1 8 1 plimitpl 152 521 0 506 1 0 1 1 0 8 0 sigapl 424 7460 0 7408 9 1 8 8 0 8 0 futexpl 64 65144 0 65141 1 0 1 1 0 8 0 knotepl 120 66220 0 66138 22 19 3 16 0 8 0 kqueuepl 184 1445 0 1437 7 6 1 4 0 8 0 pipepl 288 1194 0 1164 10 7 3 7 0 8 0 fdescpl 432 7394 0 7368 4 0 4 4 0 8 0 filepl 120 43150 0 42911 21 12 9 17 0 8 0 lockfpl 104 2023 0 2021 3 2 1 2 0 8 0 lockfspl 48 854 0 852 1 0 1 1 0 8 0 sessionpl 144 66 0 50 1 0 1 1 0 8 0 pgrppl 48 97 0 81 1 0 1 1 0 8 0 ucredpl 104 5322 0 5312 1 0 1 1 0 8 0 zombiepl 144 7475 0 7473 2 1 1 1 0 8 0 processpl 1072 7461 0 7408 6 1 5 5 0 8 0 procpl 680 17494 0 17419 11 3 8 9 0 8 0 sosppl 168 56 0 51 1 0 1 1 0 8 0 sockpl 488 11752 0 11710 157 146 11 29 0 8 1 mcl64k 65536 276 0 276 3 2 1 1 0 8 1 mcl16k 16384 139 0 139 2 2 0 1 0 8 0 mcl12k 12288 321 0 321 3 2 1 1 0 8 1 mcl9k 9216 147 0 147 2 2 0 1 0 8 0 mcl8k 8192 521 0 521 3 2 1 1 0 8 1 mcl4k 4096 720 0 720 6 5 1 4 0 8 1 mcl2k2 2112 48 0 48 2 2 0 1 0 8 0 mcl2k 2048 86994 0 86804 88 58 30 38 0 8 3 mtagpl 96 2554 0 2063 16 1 15 16 0 8 0 mbufpl 256 199210 0 198569 389 338 51 330 0 8 1 bufpl 280 16188 0 9852 453 0 453 453 0 8 0 anonpl 24 772787 0 759435 118 16 102 109 0 188 0 amapchunkpl 152 224587 0 223763 56 21 35 47 0 158 0 amappl16 200 15485 0 15031 43 17 26 37 0 8 0 amappl15 192 68 0 67 1 0 1 1 0 8 0 amappl14 184 284 0 271 2 1 1 2 0 8 0 amappl13 176 18 0 18 2 2 0 1 0 8 0 amappl12 168 8615 0 8587 2 0 2 2 0 8 0 amappl11 160 64 0 54 1 0 1 1 0 8 0 amappl10 152 116 0 106 1 0 1 1 0 8 0 amappl9 144 225 0 224 1 0 1 1 0 8 0 amappl8 136 343 0 268 3 0 3 3 0 8 0 amappl7 128 96 0 81 1 0 1 1 0 8 0 amappl6 120 850 0 831 2 1 1 2 0 8 0 amappl5 112 437 0 425 1 0 1 1 0 8 0 amappl4 104 856 0 820 3 1 2 2 0 8 0 amappl3 96 41753 0 41678 3 0 3 3 0 8 0 amappl2 88 8148 0 8078 4 2 2 4 0 8 0 amappl1 80 37175 0 36682 21 9 12 21 0 8 0 amappl 88 65720 0 65477 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 72 139 0 9 3 0 3 3 0 8 0 uaddrrnd 24 7440 0 7380 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7440 0 7380 1 0 1 1 0 8 0 vmmpekpl 168 54826 0 54757 4 0 4 4 0 8 0 vmmpepl 168 463178 0 460930 169 52 117 135 0 357 0 vmsppl 352 7440 0 7380 6 0 6 6 0 8 0 rwobjpl 24 113922 0 106385 48 0 48 48 0 8 0 pdppl 4096 14888 0 14794 502 406 96 100 0 8 2 pvpl 32 2104734 0 2085839 412 233 179 389 0 265 0 pmappl 216 7440 0 7380 4 0 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1288 0 866 19 3 16 19 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82927b8e) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e10c6,ffffffff828b33eb,bc,ffffffff82866e64) at __assert+0x29 sys/kern/subr_prf.c:157 unveil_destroy(ffff800037836e38) at unveil_destroy+0x174 sys/kern/kern_unveil.c:188 exit1(ffff80002a682000,0,0,1) at exit1+0x3d6 sys/kern/kern_exit.c:218 sys_exit(ffff80002a682000,ffff800032979ec0,ffff800032979e10) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800032979ec0) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c33131d6e90, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82927b8e) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff828e10c6,ffffffff828b33eb,bc,ffffffff82866e64) at __assert+0x29 sys/kern/subr_prf.c:157 unveil_destroy(ffff800037836e38) at unveil_destroy+0x174 sys/kern/kern_unveil.c:188 exit1(ffff80002a682000,0,0,1) at exit1+0x3d6 sys/kern/kern_exit.c:218 sys_exit(ffff80002a682000,ffff800032979ec0,ffff800032979e10) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff800032979ec0) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c33131d6e90, count: -8