panic: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 188 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 174748 63153 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83438bf0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e698e,ffffffff833a0f21,bc,ffffffff8335b1eb) at __assert+0x29 unveil_destroy(ffff8000384b34b0) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000fffface0,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000fffface0,ffff80003bcd0040,ffff80003bccff90) at sys_exit+0x1a syscall(ffff80003bcd0040) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bcd0040) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7afdd55c1f00, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "ps->ps_uvncount == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/kern/kern_unveil.c", line 188 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83438bf0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e698e,ffffffff833a0f21,bc,ffffffff8335b1eb) at __assert+0x29 unveil_destroy(ffff8000384b34b0) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000fffface0,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000fffface0,ffff80003bcd0040,ffff80003bccff90) at sys_exit+0x1a syscall(ffff80003bcd0040) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bcd0040) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7afdd55c1f00, count: -8 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80003bccfd80 rbx 0xffff800029a9cdc7 rdx 0 rcx 0xffff8000fffface0 rax 0xffff800029a9bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4a4f239fa86dfa26 r11 0x785a1ded256bf4ea r12 0xffff800029a9cbc8 r13 0 r14 0 r15 0x1 rip 0xffffffff81441685 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003bccfd70 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=14176 pid=92218 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffface0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000ffff6cf8,0xffff8000ffffa2b0 process=0xffff8000384b34b0 user=0xffff80003bccb000, vmspace=0xfffffd806ab54028 estcpu=34, cpticks=10, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 63153 174748 6464 0 7 0 syz-executor 63153 424007 6464 0 3 0x4000080 fsleep syz-executor 63153 96961 6464 0 2 0x4000000 syz-executor 63153 166769 6464 0 2 0x4000000 syz-executor 4550 7513 96405 0 2 0 syz-executor 4550 302331 96405 0 3 0x4000080 fsleep syz-executor 4550 321834 96405 0 2 0x4000000 syz-executor 96774 164559 19480 60929 2 0x10 syz-executor 96774 215793 19480 60929 3 0x4000090 fsleep syz-executor 96774 183010 19480 60929 3 0x4000090 fsleep syz-executor 96774 172615 19480 60929 3 0x4000090 fsleep syz-executor 46612 159680 7412 0 3 0x80 nanoslp syz-executor 46612 225054 7412 0 3 0x4000080 fsleep syz-executor 46612 248767 7412 0 3 0x4000080 ttyout syz-executor 72655 211378 59473 0 3 0x80 nanoslp syz-executor 72655 191010 59473 0 3 0x4000080 ttyout syz-executor 72655 172463 59473 0 3 0x4000080 fsleep syz-executor 62060 236799 0 0 3 0x14200 acct acct 60152 112301 0 0 3 0x14200 bored sosplice 71318 429221 1 0 3 0x80 nanoslp init 42125 482139 52713 0 3 0x82 nanoslp syz-executor 19480 122343 52713 0 3 0x82 nanoslp syz-executor 59473 97256 52713 0 3 0x82 nanoslp syz-executor 71213 386479 52713 0 3 0x82 wait syz-executor 7367 425852 52713 0 3 0x82 nanoslp syz-executor 96405 132100 52713 0 3 0x82 nanoslp syz-executor 6464 449217 52713 0 3 0x82 nanoslp syz-executor 7412 470085 52713 0 3 0x82 nanoslp syz-executor 52713 199931 65992 0 3 0x82 kqread syz-executor 65992 346382 16838 0 3 0x10008a sigsusp ksh 16838 331049 81247 0 3 0x98 kqread sshd-session 81247 7427 63507 0 3 0x92 kqread sshd-session 63507 247883 1 0 3 0x88 kqread sshd 878 362158 66296 74 3 0x1100092 bpf pflogd 66296 431345 1 0 3 0x80 sbwait pflogd 52450 132986 87236 73 3 0x1100090 kqread syslogd 87236 79976 1 0 3 0x100082 sbwait syslogd 72018 248187 1 0 3 0x100080 kqread resolvd 56964 469094 29979 77 3 0x100092 kqread dhcpleased 66349 395180 29979 77 3 0x100092 kqread dhcpleased 29979 466055 1 0 3 0x80 kqread dhcpleased 219 250930 0 0 3 0x14200 bored smr 57430 13943 0 0 2 0x14200 zerothread 8891 93821 0 0 3 0x14200 aiodoned aiodoned 67676 413225 0 0 3 0x14200 syncer update 28071 500891 0 0 3 0x14200 cleaner cleaner 81934 412267 0 0 2 0x14200 reaper 91169 393259 0 0 3 0x14200 pgdaemon pagedaemon 53977 409184 0 0 3 0x14200 bored viomb 88688 252817 0 0 3 0x40014200 acpi0 acpi0 19785 403492 0 0 3 0x40014200 idle1 17658 467139 0 0 3 0x14200 bored softnet3 26471 237772 0 0 3 0x14200 bored softnet2 58657 42133 0 0 3 0x14200 bored softnet1 89857 128497 0 0 3 0x14200 bored softnet0 26703 503419 0 0 3 0x14200 bored systqmp 26195 101995 0 0 3 0x14200 bored systq 92856 71905 0 0 3 0x14200 tmoslp softclockmp 77977 118980 0 0 3 0x40014200 tmoslp softclock 8843 135835 0 0 3 0x40014200 idle0 1 174036 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 63153 (syz-executor) thread 0xffff8000ffff62b8 (96961) Process 81934 (reaper) thread 0xffff8000ffffd718 (412267) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10194 11036K 11259K 166960K 12119 0 pcb 17 15K 16K 166960K 209 0 rtable 170 6K 7K 166960K 401 0 pf 33 17K 25K 166960K 80 0 ifaddr 33 5K 7K 166960K 60 0 ifgroup 47 2K 2K 166960K 84 0 sysctl 4 1K 1K 166960K 4 0 counters 60 35K 36K 166960K 90 0 ioctlops 0 0K 4K 166960K 1526 0 iov 0 0K 16K 166960K 97 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1393 88K 88K 166960K 2099 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 21 5K 5K 166960K 26 0 dirhash 15 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 727 0 sigio 0 0K 0K 166960K 13 0 proc 67 103K 128K 166960K 600 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 101 0 in_multi 75 5K 7K 166960K 124 0 ether_multi 1 0K 0K 166960K 6 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 540 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 248 73K 82K 166960K 8658 0 UVM aobj 19 2K 4K 166960K 25 0 pinsyscall 42 84K 104K 166960K 1823 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 42 0 NDP 10 0K 2K 166960K 39 0 temp 76 8640K 8706K 166960K 36752 0 kqueue 14 22K 28K 166960K 136 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 63 0 60 1 0 1 1 0 8 0 rtentry 112 123 0 48 4 0 4 4 0 8 0 unpcb 144 1000 0 981 11 6 5 6 0 8 4 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 808 262 0 258 5 1 4 4 0 8 3 arp 120 19 0 9 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 376 951 0 941 12 6 6 8 0 8 4 nd6 136 26 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 10 0 10 1 0 1 1 0 8 1 pppxif 1472 1 0 1 1 0 1 1 0 8 1 pffrag 232 6 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 14 0 10 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 1 4 5 0 8 4 pfosfpen 112 1428 0 1428 21 1 20 21 0 8 20 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 63 0 11 1 0 1 1 0 8 0 pfstkey 128 63 0 11 2 0 2 2 0 8 0 pfstate 376 63 0 11 6 0 6 6 0 8 0 pfrule 1344 23 0 17 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 520 0 170 29 2 27 29 0 8 2 art_table 32 522 0 170 4 0 4 4 0 8 0 art_node 16 122 0 56 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 5 1 0 1 1 0 8 0 semapl 112 22 0 3 1 0 1 1 0 8 0 shmpl 112 22 0 6 1 0 1 1 0 8 0 dirhash 1024 23 0 4 3 0 3 3 0 8 0 dino2pl 256 2770 0 1263 95 0 95 95 0 8 0 ffsino 280 2770 0 1263 109 0 109 109 0 8 0 nchpl 144 3812 0 2117 63 0 63 63 0 8 0 uvmvnodes 80 3285 0 0 68 0 68 68 0 8 0 vnodes 216 3285 0 0 183 0 183 183 0 8 0 namei 1024 13164 0 13164 2 1 1 2 0 8 1 percpumem 16 59 0 15 1 0 1 1 0 8 0 kstatmem 264 44 0 24 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 11390 0 11390 10 2 8 8 1 8 8 plimitpl 152 104 0 85 1 0 1 1 0 8 0 sigapl 424 1032 0 980 7 1 6 7 0 8 0 futexpl 64 9064 0 9057 1 0 1 1 0 8 0 knotepl 120 556 0 0 17 0 17 17 0 8 0 kqueuepl 216 324 0 314 8 5 3 5 0 8 2 pipepl 328 294 0 267 10 5 5 8 0 8 2 fdescpl 504 1012 0 981 5 0 5 5 0 8 0 filepl 152 6893 0 6670 24 8 16 17 0 8 5 lockfpl 104 248 0 243 1 0 1 1 0 8 0 lockfspl 48 79 0 75 1 0 1 1 0 8 0 sessionpl 144 25 0 17 1 0 1 1 0 8 0 pgrppl 48 43 0 27 1 0 1 1 0 8 0 ucredpl 104 1114 0 1099 1 0 1 1 0 8 0 zombiepl 144 1184 0 1181 1 0 1 1 0 8 0 processpl 1168 1032 0 980 5 1 4 5 0 8 0 procpl 656 2142 0 2076 7 1 6 7 0 8 0 srpgc 96 4 0 4 1 0 1 1 0 8 1 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 688 2090 0 2058 33 22 11 16 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 183 0 0 12 0 12 12 0 8 0 bufpl 280 3550 0 132 245 0 245 245 0 8 0 anonpl 24 158804 0 155257 42 8 34 34 0 184 9 amapchunkpl 152 27592 0 27019 33 7 26 26 0 158 3 amappl16 200 2904 0 2871 6 2 4 5 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 118 0 107 1 0 1 1 0 8 0 amappl13 176 33 0 31 1 0 1 1 0 8 0 amappl12 168 1662 0 1631 3 1 2 2 0 8 0 amappl11 160 51 0 37 1 0 1 1 0 8 0 amappl10 152 9 0 9 1 1 0 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 129 0 118 1 0 1 1 0 8 0 amappl6 120 187 0 184 1 0 1 1 0 8 0 amappl5 112 140 0 130 1 0 1 1 0 8 0 amappl4 104 326 0 307 1 0 1 1 0 8 0 amappl3 96 5391 0 5264 4 0 4 4 0 8 0 amappl2 88 655 0 594 2 0 2 2 0 8 0 amappl1 80 9955 0 9403 15 1 14 14 0 8 1 amappl 88 8234 0 8040 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 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 7 0 7 2 2 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 24 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1012 0 980 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1012 0 980 1 0 1 1 0 8 0 vmmpekpl 168 10536 0 10502 2 0 2 2 0 8 0 vmmpepl 168 67255 0 65346 92 4 88 88 0 357 5 vmsppl 456 1011 0 980 6 1 5 5 0 8 0 rwobjpl 64 23679 0 19444 69 0 69 69 0 8 0 pdppl 4096 2031 0 1960 107 36 71 83 0 8 0 pvpl 32 12750 0 0 103 0 103 103 0 265 0 pmappl 248 1011 0 980 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 293 0 46 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83851ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff8398e688) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8398e688) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7c2d66c3da10, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83851ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff8398e688) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8398e688) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x7c2d66c3da10, count: -6 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83438bf0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e698e,ffffffff833a0f21,bc,ffffffff8335b1eb) at __assert+0x29 unveil_destroy(ffff8000384b34b0) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000fffface0,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000fffface0,ffff80003bcd0040,ffff80003bccff90) at sys_exit+0x1a syscall(ffff80003bcd0040) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bcd0040) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7afdd55c1f00, count: 7 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff83438bf0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e698e,ffffffff833a0f21,bc,ffffffff8335b1eb) at __assert+0x29 unveil_destroy(ffff8000384b34b0) at unveil_destroy+0x1dd sys/kern/kern_unveil.c:188 exit1(ffff8000fffface0,0,0,1) at exit1+0x60f sys/kern/kern_exit.c:233 sys_exit(ffff8000fffface0,ffff80003bcd0040,ffff80003bccff90) at sys_exit+0x1a syscall(ffff80003bcd0040) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003bcd0040) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7afdd55c1f00, count: -8