login: panic: kernel diagnostic assertion "ps->ps_uvncount == 0" faile d: 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(ffffffff830afb12) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83067464,ffffffff83039b62,bc,ffffffff82fecb7c) at __assert+0x29 unveil_destroy(ffff80002a5c59d8) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a4f6540,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a4f6540,ffff80002a5756a0,ffff80002a5755f0) at sys_exit+0x1a syscall(ffff80002a5756a0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x730d13a93780, count: 7 https://www.openbsd.org/ddb.html describes the minimum info req uired in bug reports. Insufficient info makes it difficult to find and fix b ugs. 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(ffffffff830afb12) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83067464,ffffffff83039b62,bc,ffffffff82fecb7c) at __assert+0x29 unveil_destroy(ffff80002a5c59d8) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a4f6540,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a4f6540,ffff80002a5756a0,ffff80002a5755f0) at sys_exit+0x1a syscall(ffff80002a5756a0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x730d13a93780, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a5753f0 rbx 0xffff80002a5c59d8 rdx 0 rcx 0 rax 0xffff80002a4f6540 r8 0 r9 0x8080808080808080 r10 0x14466450348c6acc r11 0xcaa6c32b4d8e6ba0 r12 0 r13 0x2 r14 0 r15 0x1 rip 0xffffffff81598255 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a5753e0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=120359 pid=63383 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a4f6540 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a4f6cd8,0xffffffff83572100 process=0xffff80002a5c59d8 user=0xffff80002a570000, vmspace=0xfffffd806c1b2c28 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 59975 495621 31875 0 3 0x80 fsleep syz-executor 59975 277250 31875 0 3 0x4000080 fifow syz-executor 84195 395086 26306 0 3 0x80 fsleep syz-executor 84195 405286 26306 0 3 0x4000080 semwait syz-executor 84195 273213 26306 0 3 0x4000080 fsleep syz-executor 33392 239097 54104 0 3 0x80 fsleep syz-executor 33392 363195 54104 0 3 0x4000080 sbwait syz-executor 60694 376581 25083 0 3 0x80 fsleep syz-executor 60694 502921 25083 0 3 0x4000080 nanoslp syz-executor 35117 100005 22290 0 3 0x4000090 fsleep syz-executor 35117 194231 22290 0 3 0x4000090 sbwait syz-executor 80470 188123 60610 0 3 0x80 fsleep syz-executor 80470 502906 60610 0 3 0x4000080 sbwait syz-executor 81044 473868 4000 0 3 0x80 fsleep syz-executor 81044 203784 4000 0 3 0x4000080 ttyin syz-executor 89825 43518 1 0 3 0x100083 ttyin getty 25083 470066 1157 0 2 0x482 syz-executor 73995 106857 1157 0 3 0x82 nanoslp syz-executor 54104 385731 1157 0 2 0x482 syz-executor 22290 218739 1157 0 2 0x482 syz-executor 4000 498952 1157 0 2 0x482 syz-executor 26306 380836 1157 0 3 0x82 nanoslp syz-executor 60610 379795 1157 0 2 0x482 syz-executor 31875 439070 1157 0 3 0x82 nanoslp syz-executor 80645 338190 0 0 3 0x14200 acct acct 57106 319509 0 0 3 0x14280 nfsidl nfsio 66951 27947 0 0 3 0x14280 nfsidl nfsio 17908 133444 0 0 3 0x14280 nfsidl nfsio 7998 145459 0 0 3 0x14280 nfsidl nfsio 34409 260067 0 0 3 0x14280 nfsidl nfsio 4367 41451 0 0 3 0x14280 nfsidl nfsio 28408 515811 0 0 3 0x14280 nfsidl nfsio 15336 388376 0 0 3 0x14280 nfsidl nfsio 49715 310698 0 0 3 0x14280 nfsidl nfsio 60064 522358 0 0 3 0x14280 nfsidl nfsio 26473 264358 0 0 3 0x14280 nfsidl nfsio 89035 85617 0 0 3 0x14280 nfsidl nfsio 54788 36333 0 0 3 0x14280 nfsidl nfsio 63563 246139 0 0 3 0x14280 nfsidl nfsio 62146 310882 0 0 3 0x14280 nfsidl nfsio 99968 90544 0 0 3 0x14280 nfsidl nfsio 83238 366708 0 0 3 0x14280 nfsidl nfsio 33006 316581 0 0 3 0x14280 nfsidl nfsio 1989 466265 0 0 3 0x14280 nfsidl nfsio 2238 322800 0 0 3 0x14280 nfsidl nfsio 36285 57164 0 0 3 0x14200 bored sosplice 1157 460709 93893 0 3 0x82 kqread syz-executor 93893 486606 86588 0 3 0x10008a sigsusp ksh 86588 335014 51846 0 3 0x98 kqread sshd-session 51846 483209 96215 0 3 0x92 kqread sshd-session 96215 251020 1 0 3 0x88 kqread sshd 39337 457423 2878 73 3 0x1100090 kqread syslogd 2878 242333 1 0 3 0x100082 sbwait syslogd 35899 411263 1 0 3 0x100080 kqread resolvd 61064 235157 72331 77 3 0x100092 kqread dhcpleased 75406 104496 72331 77 3 0x100092 kqread dhcpleased 72331 164641 1 0 3 0x80 kqread dhcpleased 80424 520177 0 0 3 0x14200 bored smr 95937 440971 0 0 2 0x14200 zerothread 467 484786 0 0 3 0x14200 aiodoned aiodoned 98236 80848 0 0 3 0x14200 syncer update 54540 304205 0 0 3 0x14200 cleaner cleaner 78810 377226 0 0 2 0x14200 reaper 33612 408853 0 0 3 0x14200 pgdaemon pagedaemon 93437 462451 0 0 3 0x14200 bored viomb 27402 380581 0 0 3 0x40014200 acpi0 acpi0 48930 344992 0 0 3 0x14200 bored softnet3 10342 40816 0 0 3 0x14200 bored softnet2 74165 341472 0 0 3 0x14200 bored softnet1 71293 45275 0 0 3 0x14200 bored softnet0 66285 412141 0 0 3 0x14200 bored systqmp 78804 460735 0 0 3 0x14200 bored systq 28869 306677 0 0 2 0x40014200 softclock 40850 511982 0 0 3 0x40014200 idle0 1 125894 0 0 3 0x80082 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 10187 11135K 11516K 166960K 13229 0 pcb 17 20K 22K 166960K 429 0 rtable 248 7K 8K 166960K 2911 0 pf 38 14K 271K 166960K 250 0 ifaddr 43 8K 8K 166960K 365 0 ifgroup 54 2K 2K 166960K 406 0 sysctl 3 0K 1K 166960K 4 0 counters 31 17K 17K 166960K 119 0 ioctlops 0 0K 8K 166960K 478 0 iov 2 8K 16K 166960K 186 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1492 94K 94K 166960K 3584 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 13 0K 0K 166960K 53 0 dirhash 15 2K 3K 166960K 24 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 97K 166960K 2593 0 sigio 0 0K 0K 166960K 113 0 proc 67 83K 116K 166960K 2633 0 subproc 104 6K 6K 166960K 1041 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 281 0 in_multi 98 7K 7K 166960K 961 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 1761 0 pfkey data 0 0K 4K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 230 72K 90K 166960K 20929 0 UVM aobj 44 2K 2K 166960K 47 0 pinsyscall 39 78K 100K 166960K 5507 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 94 0 NDP 12 0K 2K 166960K 268 0 temp 80 6816K 6882K 166960K 88042 0 kqueue 13 20K 28K 166960K 255 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 120 361 0 358 4 2 2 3 0 8 1 rtentry 112 1051 0 937 4 0 4 4 0 8 0 unpcb 144 1269 0 1243 6 2 4 4 0 8 3 syncache 336 8 0 8 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 724 0 720 16 9 7 7 0 8 6 arp 88 174 0 155 1 0 1 1 0 8 0 ipq 40 10 0 9 1 0 1 1 0 8 0 ipqe 40 66 0 65 1 0 1 1 0 8 0 inpcb 336 2479 0 2471 26 17 9 12 0 8 8 nd6 104 263 0 238 1 0 1 1 0 8 0 pkpcb 40 11 0 11 2 1 1 1 0 8 1 kcovpl 48 80 0 72 1 0 1 1 0 8 0 ppxss 1072 8 0 8 2 1 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pftag 88 3 0 1 2 1 1 1 0 8 0 pfstitem 24 5 0 4 1 0 1 1 0 8 0 pfstkey 128 143 0 138 1 0 1 1 0 8 0 pfstate 344 73 0 72 1 0 1 1 0 8 0 pfrule 1344 14 0 11 1 0 1 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 4107 0 3647 32 1 31 32 0 8 2 art_table 32 4111 0 3647 5 0 5 5 0 8 1 art_node 16 1010 0 908 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 8 1 0 1 1 0 8 0 semapl 112 49 0 39 1 0 1 1 0 8 0 shmpl 112 44 0 3 2 0 2 2 0 8 0 dirhash 1024 25 0 6 3 0 3 3 0 8 0 dino2pl 256 4228 0 2594 103 0 103 103 0 8 0 ffsino 240 4228 0 2594 97 0 97 97 0 8 0 nchpl 144 6535 0 4773 66 0 66 66 0 8 0 uvmvnodes 80 6104 0 0 125 0 125 125 0 8 0 vnodes 216 6104 0 0 340 0 340 340 0 8 0 namei 1024 29971 0 29971 4 3 1 2 0 8 1 kstatmem 264 200 0 176 2 0 2 2 0 8 0 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 48427 0 48427 9 7 2 8 1 8 2 plimitpl 152 461 0 444 1 0 1 1 0 8 0 sigapl 424 2756 0 2688 9 1 8 8 0 8 0 futexpl 64 20991 0 20983 1 0 1 1 0 8 0 knotepl 120 65420 0 65373 44 34 10 17 0 8 8 kqueuepl 184 381 0 372 1 0 1 1 0 8 0 pipepl 288 657 0 629 9 2 7 7 0 8 5 fdescpl 432 2717 0 2688 5 1 4 5 0 8 0 filepl 120 15435 0 15188 19 6 13 14 0 8 4 lockfpl 104 869 0 867 3 1 2 2 0 8 1 lockfspl 48 248 0 246 1 0 1 1 0 8 0 sessionpl 144 97 0 89 1 0 1 1 0 8 0 pgrppl 48 187 0 171 1 0 1 1 0 8 0 ucredpl 104 2448 0 2435 1 0 1 1 0 8 0 zombiepl 144 2968 0 2967 2 1 1 1 0 8 0 processpl 1096 2756 0 2688 6 0 6 6 0 8 0 procpl 648 4825 0 4747 7 0 7 7 0 8 0 sosppl 168 5 0 5 3 2 1 1 0 8 1 sockpl 504 4175 0 4138 54 42 12 21 0 8 7 mcl64k 65536 24 0 23 3 2 1 1 0 8 0 mcl16k 16384 5 0 5 2 1 1 1 0 8 1 mcl9k 9216 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 27 0 27 3 2 1 1 0 8 1 mcl4k 4096 4766 0 4712 15 6 9 14 0 8 1 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 2966 0 2962 8 6 2 6 0 8 1 mtagpl 96 48 0 48 1 0 1 1 0 8 1 mbufpl 256 25745 0 25572 30 9 21 22 0 8 8 bufpl 280 11184 0 3093 578 0 578 578 0 8 0 anonpl 24 371517 0 368177 129 51 78 78 0 187 51 amapchunkpl 152 66805 0 66296 54 13 41 41 0 158 21 amappl16 200 6194 0 6174 48 40 8 14 0 8 6 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 253 0 243 1 0 1 1 0 8 0 amappl13 176 7 0 7 2 1 1 1 0 8 1 amappl12 168 4483 0 4452 3 1 2 3 0 8 0 amappl11 160 50 0 40 1 0 1 1 0 8 0 amappl10 152 15 0 15 1 1 0 1 0 8 0 amappl9 144 135 0 135 1 1 0 1 0 8 0 amappl8 136 29 0 27 1 0 1 1 0 8 0 amappl7 128 273 0 263 1 0 1 1 0 8 0 amappl6 120 884 0 882 1 0 1 1 0 8 0 amappl5 112 415 0 406 1 0 1 1 0 8 0 amappl4 104 521 0 504 1 0 1 1 0 8 0 amappl3 96 13160 0 13045 5 1 4 4 0 8 1 amappl2 88 1707 0 1643 2 0 2 2 0 8 0 amappl1 80 19723 0 19209 14 1 13 13 0 8 1 amappl 88 19899 0 19723 5 0 5 5 0 92 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 8 0 8 2 1 1 1 0 8 1 dma128 128 254 0 254 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 46 0 3 1 0 1 1 0 8 0 uaddrrnd 24 2717 0 2687 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2717 0 2687 1 0 1 1 0 8 0 vmmpekpl 168 22128 0 22085 3 0 3 3 0 8 0 vmmpepl 168 168028 0 166261 99 12 87 89 0 357 10 vmsppl 344 2716 0 2687 4 1 3 4 0 8 0 rwobjpl 24 51930 0 44932 43 0 43 43 0 8 0 pdppl 4096 5440 0 5374 200 130 70 82 0 8 4 pvpl 32 1300736 0 1290478 527 173 354 358 0 265 260 pmappl 216 2716 0 2687 3 1 2 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 615 0 233 11 0 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(ffffffff830afb12) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83067464,ffffffff83039b62,bc,ffffffff82fecb7c) at __assert+0x29 unveil_destroy(ffff80002a5c59d8) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a4f6540,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a4f6540,ffff80002a5756a0,ffff80002a5755f0) at sys_exit+0x1a syscall(ffff80002a5756a0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x730d13a93780, 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(ffffffff830afb12) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83067464,ffffffff83039b62,bc,ffffffff82fecb7c) at __assert+0x29 unveil_destroy(ffff80002a5c59d8) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff80002a4f6540,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff80002a4f6540,ffff80002a5756a0,ffff80002a5755f0) at sys_exit+0x1a syscall(ffff80002a5756a0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x730d13a93780, count: -8