panic: kernel diagnostic assertion "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_page.c", line 1236 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *171686 85883 32767 0x10 0x4000000 0K syz-executor 217534 41624 32767 0x10 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b665a) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f0e63,ffffffff833451ec,4d4,ffffffff8342187a) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagewire(fffffd800882efb0) at uvm_pagewire+0x1cd sys/uvm/uvm_page.c:1228 uvm_fault_upper(ffff80003c456620,ffff80003c456658,ffff80003c456520) at uvm_fault_upper+0x409 sys/uvm/uvm_fault.c:1159 uvm_fault(fffffd806c9f9210,20000033f000,2,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635 uvm_fault_wire(fffffd806c9f9210,20000033f000,200000353000,2) at uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703 uvm_map_pageable_wire(fffffd806c9f9210,fffffd806cdf1558,fffffd806cdf1168,ffff80002a270018,0,0) at uvm_map_pageable_wire+0x3dc sys/uvm/uvm_map.c:2125 sys_mlock(ffff80002a270018,ffff80003c456940,ffff80003c456890) at sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 syscall(ffff80003c456940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c456940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdac2e09a6f0, count: 4 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: kernel diagnostic assertion "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_page.c", line 1236 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b665a) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f0e63,ffffffff833451ec,4d4,ffffffff8342187a) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagewire(fffffd800882efb0) at uvm_pagewire+0x1cd sys/uvm/uvm_page.c:1228 uvm_fault_upper(ffff80003c456620,ffff80003c456658,ffff80003c456520) at uvm_fault_upper+0x409 sys/uvm/uvm_fault.c:1159 uvm_fault(fffffd806c9f9210,20000033f000,2,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635 uvm_fault_wire(fffffd806c9f9210,20000033f000,200000353000,2) at uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703 uvm_map_pageable_wire(fffffd806c9f9210,fffffd806cdf1558,fffffd806cdf1168,ffff80002a270018,0,0) at uvm_map_pageable_wire+0x3dc sys/uvm/uvm_map.c:2125 sys_mlock(ffff80002a270018,ffff80003c456940,ffff80003c456890) at sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 syscall(ffff80003c456940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c456940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdac2e09a6f0, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c456360 rbx 0xffffffff838a1e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff80002a270018 rax 0xffffffff838a0ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xaf1b91e4f511f4ca r11 0x203a484329596fc4 r12 0xffffffff838a1c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff82e80445 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c456350 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=171686 pid=85883 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=51, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a271a08,0xffffffff839e7288 process=0xffff8000fffe9830 user=0xffff80003c451000, vmspace=0xfffffd806c9f9210 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 85883 33642 44958 32767 2 0x10 syz-executor 85883 441911 44958 32767 2 0x4000010 syz-executor *85883 171686 44958 32767 7 0x4000010 syz-executor 84590 16269 2961 32767 2 0x10 syz-executor 84590 313682 2961 32767 3 0x4000090 fsleep syz-executor 48639 6299 68718 32767 2 0x10 syz-executor 48639 416296 68718 32767 3 0x4000090 fsleep syz-executor 56993 357043 25423 0 2 0x100002 ndp 25423 262335 72877 0 3 0x10008a sigsusp sh 91130 195907 68780 32767 2 0x10 syz-executor 91130 465816 68780 32767 3 0x4000090 fsleep syz-executor 41624 49916 47610 32767 2 0x10 syz-executor 41624 217534 47610 32767 7 0x4000010 syz-executor 29022 344503 75610 0 2 0x2 ndp 75610 157311 17006 0 3 0x10008a sigsusp sh 77800 330420 50608 0 2 0x10000080 syz-executor 17006 230641 41288 0 3 0x80 wait syz-executor 68718 378953 413 32767 2 0xc90 syz-executor 44958 52061 93975 32767 2 0xc90 syz-executor 47610 84324 92729 32767 2 0xc90 syz-executor 2961 166889 8976 32767 2 0xc90 syz-executor 72877 198951 93351 0 3 0x80 wait syz-executor 68780 460401 75224 32767 2 0xc90 syz-executor 50608 231154 77135 0 3 0x82 wait syz-executor 41288 448929 77135 0 3 0x82 wait syz-executor 413 247532 77135 0 3 0x82 wait syz-executor 93975 237378 77135 0 3 0x82 wait syz-executor 8976 335303 77135 0 3 0x82 wait syz-executor 92729 137593 77135 0 3 0x82 wait syz-executor 93351 88732 77135 0 3 0x82 wait syz-executor 75224 30161 77135 0 3 0x82 wait syz-executor 77135 272648 80802 0 3 0x82 kqread syz-executor 80802 80273 29108 0 3 0x10008a sigsusp ksh 29108 380951 42334 0 3 0x98 kqread sshd-session 42334 91086 62680 0 3 0x92 kqread sshd-session 60165 366549 1 0 3 0x100083 ttyin getty 62680 279157 1 0 3 0x88 kqread sshd 42433 294921 82926 73 3 0x1100090 kqread syslogd 82926 289881 1 0 3 0x100082 sbwait syslogd 91895 172115 1 0 3 0x100080 kqread resolvd 23075 101662 93114 77 2 0x100092 dhcpleased 55896 295885 93114 77 3 0x100092 kqread dhcpleased 93114 187101 1 0 3 0x80 kqread dhcpleased 21454 465653 0 0 2 0x40014200 smr 99234 456100 0 0 2 0x14200 zerothread 36428 415589 0 0 3 0x14200 aiodoned aiodoned 95632 514611 0 0 3 0x14200 syncer update 64821 347139 0 0 3 0x14200 cleaner cleaner 58460 18272 0 0 3 0x14200 reaper reaper 91661 186178 0 0 3 0x14200 pgdaemon pagedaemon 8039 465058 0 0 3 0x14200 bored viomb 30021 76868 0 0 3 0x40014200 acpi0 acpi0 85988 20838 0 0 3 0x40014200 idle1 12296 13175 0 0 3 0x14200 bored softnet1 22245 37030 0 0 3 0x14200 bored softnet0 24416 115922 0 0 3 0x14200 smrbar systqmp 8939 483062 0 0 3 0x14200 bored systq 99720 265238 0 0 3 0x14200 tmoslp softclockmp 71334 87817 0 0 3 0x40014200 tmoslp softclock 48384 17682 0 0 3 0x40014200 idle0 1 187091 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 85883 (syz-executor) thread 0xffff80002a270018 (171686) exclusive rwlock amaplk r = 0 (0xfffffd806c885340) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703 #5 uvm_map_pageable_wire+0x3dc sys/uvm/uvm_map.c:2125 #6 sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 #7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #8 Xsyscall+0x128 shared rwlock vmmaplk r = 0 (0xfffffd806c9f9310) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703 #6 uvm_map_pageable_wire+0x3dc sys/uvm/uvm_map.c:2125 #7 sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839a1c48) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:775 #2 Xsyscall+0x128 Process 24416 (systqmp) thread 0xffff8000ffffe530 (115922) shared rwlock systqmp r = 0 (0xffffffff8382a2a8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10183 10957K 10973K 166960K 11274 0 pcb 17 12K 12K 166960K 17 0 rtable 217 6K 6K 166960K 311 0 pf 31 16K 16K 166960K 31 0 ifaddr 40 7K 7K 166960K 42 0 ifgroup 50 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 28 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1335 84K 84K 166960K 1356 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 27 101K 125K 166960K 138 0 proc 58 99K 147K 166960K 465 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 89 6K 6K 166960K 89 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 31 148K 148K 166960K 31 0 exec 0 0K 1K 166960K 341 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 250 150K 151K 166960K 2870 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 50 100K 109K 166960K 1162 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 25 1K 1K 166960K 25 0 temp 34 8666K 8730K 166960K 3685 0 kqueue 13 20K 20K 166960K 22 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 30 0 26 1 0 1 1 0 8 0 rtentry 176 101 0 1 5 0 5 5 0 8 0 unpcb 144 34 0 18 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 9 0 5 1 0 1 1 0 8 0 arp 136 17 0 0 1 0 1 1 0 8 0 inpcb 328 61 0 51 1 0 1 1 0 8 0 nd6 152 19 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 256 410 0 0 26 0 26 26 0 8 0 art_table 40 411 0 0 5 0 5 5 0 8 0 art_node 32 101 0 4 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1554 0 49 95 0 95 95 0 8 0 ffsino 296 1554 0 49 116 0 116 116 0 8 0 nchpl 144 1741 0 52 63 0 63 63 0 8 0 vnodes 216 1635 0 0 91 0 91 91 0 8 0 namei 1024 4929 0 4929 1 0 1 1 0 8 1 percpumem 16 50 0 0 1 0 1 1 0 8 0 kstatmem 264 24 0 0 2 0 2 2 0 8 0 scxspl 216 5699 0 5699 3 1 2 2 1 8 2 plimitpl 152 34 0 10 1 0 1 1 0 8 0 sigapl 424 418 0 362 7 0 7 7 0 8 0 knotepl 120 50 0 0 2 0 2 2 0 8 0 kqueuepl 224 19 0 9 1 0 1 1 0 8 0 pipepl 344 109 0 82 3 0 3 3 0 8 0 fdescpl 528 402 0 363 4 0 4 4 0 8 0 filepl 160 1338 0 1122 10 0 10 10 0 8 0 lockfpl 104 7 0 4 1 0 1 1 0 8 0 lockfspl 48 5 0 2 1 0 1 1 0 8 0 sessionpl 144 21 0 5 1 0 1 1 0 8 0 pgrppl 48 29 0 5 1 0 1 1 0 8 0 ucredpl 104 81 0 65 1 0 1 1 0 8 0 zombiepl 144 363 0 362 1 0 1 1 0 8 0 processpl 1232 418 0 362 5 0 5 5 0 8 0 procpl 664 425 0 363 6 0 6 6 0 8 0 sockpl 752 125 0 95 4 0 4 4 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 15 0 0 2 0 2 2 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 147 0 0 10 0 10 10 0 8 0 bufpl 280 2233 0 119 151 0 151 151 0 8 0 anonpl 32 4965 0 0 41 0 41 41 0 246 0 amapchunkpl 152 8217 0 7397 32 0 32 32 0 158 0 amappl16 200 1539 0 1528 5 0 5 5 0 8 4 amappl15 192 4 0 4 1 0 1 1 0 8 1 amappl14 184 1 0 1 1 0 1 1 0 8 1 amappl13 176 395 0 392 1 0 1 1 0 8 0 amappl12 168 725 0 680 2 0 2 2 0 8 0 amappl11 160 32 0 32 1 0 1 1 0 8 1 amappl10 152 43 0 33 1 0 1 1 0 8 0 amappl9 144 282 0 282 1 0 1 1 0 8 1 amappl8 136 16 0 15 1 0 1 1 0 8 0 amappl7 128 86 0 85 1 0 1 1 0 8 0 amappl6 120 251 0 236 1 0 1 1 0 8 0 amappl5 112 70 0 63 1 0 1 1 0 8 0 amappl4 104 348 0 325 1 0 1 1 0 8 0 amappl3 96 1234 0 1118 3 0 3 3 0 8 0 amappl2 88 478 0 424 2 0 2 2 0 8 0 amappl1 80 8559 0 7945 13 0 13 13 0 8 0 amappl 88 2218 0 2044 4 0 4 4 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 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 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 402 0 363 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 402 0 363 1 0 1 1 0 8 0 vmmpekpl 168 4768 0 4741 2 0 2 2 0 8 0 vmmpepl 168 33170 0 31097 91 0 91 91 0 357 0 vmsppl 488 401 0 363 7 1 6 6 0 8 0 rwobjpl 80 12316 0 11327 21 0 21 21 0 8 0 pdppl 4096 811 0 726 107 10 97 97 0 8 12 pvpl 32 10795 0 0 88 0 88 88 0 265 0 pmappl 256 401 0 363 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 270 0 13 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b665a) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f0e63,ffffffff833451ec,4d4,ffffffff8342187a) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagewire(fffffd800882efb0) at uvm_pagewire+0x1cd sys/uvm/uvm_page.c:1228 uvm_fault_upper(ffff80003c456620,ffff80003c456658,ffff80003c456520) at uvm_fault_upper+0x409 sys/uvm/uvm_fault.c:1159 uvm_fault(fffffd806c9f9210,20000033f000,2,2) at uvm_fault+0x198 sys/uvm/uvm_fault.c:635 uvm_fault_wire(fffffd806c9f9210,20000033f000,200000353000,2) at uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703 uvm_map_pageable_wire(fffffd806c9f9210,fffffd806cdf1558,fffffd806cdf1168,ffff80002a270018,0,0) at uvm_map_pageable_wire+0x3dc sys/uvm/uvm_map.c:2125 sys_mlock(ffff80002a270018,ffff80003c456940,ffff80003c456890) at sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 syscall(ffff80003c456940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c456940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdac2e09a6f0, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x68 copyout() at copyout+0x64 syscall(ffff80003c423870) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c423870) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdcbbfd6d4a0, count: 8 ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x68 copyout() at copyout+0x64 syscall(ffff80003c423870) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c423870) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xdcbbfd6d4a0, count: -7