panic: kernel diagnostic assertion "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_page.c", line 1268 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:438 panic(ffffffff8337c60e) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ba533,ffffffff833a5488,4f4,ffffffff833eae91) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagedeactivate(fffffd8006f5a100) at uvm_pagedeactivate+0x2d6 sys/uvm/uvm_page.c:1265 uvn_flush(fffffd807d6b3a18,0,0,14) at uvn_flush+0x43b sys/uvm/uvm_vnode.c:668 uvn_detach(fffffd807d6b3a18) at uvn_detach+0x18e sys/uvm/uvm_vnode.c:371 uvm_unmap_detach(ffff80003c993140,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364 uvm_map_teardown(fffffd806cb2bd00) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2525 exit1(ffff80002a86b268,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a86b268,ffff80003c993300,ffff80003c993250) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c993300) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c993300) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71a1365c6a80, count: 3 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 "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_page.c", line 1268 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8337c60e) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ba533,ffffffff833a5488,4f4,ffffffff833eae91) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagedeactivate(fffffd8006f5a100) at uvm_pagedeactivate+0x2d6 sys/uvm/uvm_page.c:1265 uvn_flush(fffffd807d6b3a18,0,0,14) at uvn_flush+0x43b sys/uvm/uvm_vnode.c:668 uvn_detach(fffffd807d6b3a18) at uvn_detach+0x18e sys/uvm/uvm_vnode.c:371 uvm_unmap_detach(ffff80003c993140,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364 uvm_map_teardown(fffffd806cb2bd00) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2525 exit1(ffff80002a86b268,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a86b268,ffff80003c993300,ffff80003c993250) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c993300) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c993300) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71a1365c6a80, count: -12 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c992e50 rbx 0x14 rdx 0 rcx 0 rax 0xffff80002a86b268 r8 0x101010101010101 r9 0x8080808080808080 r10 0xfe7411473c7b1a22 r11 0xf75d401985d096f r12 0 r13 0x204000c __kernel_phys_base+0x104000c r14 0 r15 0x1 rip 0xffffffff82bcc065 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c992e40 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=420335 pid=62546 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=17, usrpri=85, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a86b268 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a86b798,0xffff80003c93f260 process=0xffff800038124da0 user=0xffff80003c98e000, vmspace=0xfffffd806cb2bd00 estcpu=35, cpticks=5, pctcpu=0.2, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 6479 11625 90274 0 2 0 syz-executor 87931 436555 65957 60928 3 0x90 nanoslp syz-executor 87931 59798 65957 60928 3 0x4000090 kqread syz-executor 87931 507887 65957 60928 3 0x4000090 fsleep syz-executor 96193 353946 22026 0 2 0xc82 syz-executor 27341 96086 22026 0 2 0x2 syz-executor 63630 22392 22026 0 2 0x2 syz-executor 61324 247911 68860 0 3 0x82 sbwait sshd-session 54770 159598 1 0 3 0x100083 ttyin getty 82105 465487 0 0 3 0x14280 nfsidl nfsio 22093 128160 0 0 3 0x14280 nfsidl nfsio 25434 239861 0 0 3 0x14280 nfsidl nfsio 35566 436319 0 0 3 0x14280 nfsidl nfsio 24598 512128 0 0 3 0x14280 nfsidl nfsio 50251 8103 0 0 3 0x14280 nfsidl nfsio 9884 448229 0 0 3 0x14280 nfsidl nfsio 31342 364854 0 0 3 0x14280 nfsidl nfsio 43933 427133 0 0 3 0x14280 nfsidl nfsio 22811 483129 0 0 3 0x14280 nfsidl nfsio 70848 337405 0 0 3 0x14280 nfsidl nfsio 47950 230918 0 0 3 0x14280 nfsidl nfsio 20626 112293 0 0 3 0x14280 nfsidl nfsio 38461 311680 0 0 3 0x14280 nfsidl nfsio 66776 42466 0 0 3 0x14280 nfsidl nfsio 28359 113214 0 0 3 0x14280 nfsidl nfsio 76155 271467 0 0 3 0x14280 nfsidl nfsio 9198 93938 0 0 3 0x14280 nfsidl nfsio 47267 106733 0 0 3 0x14280 nfsidl nfsio 31931 141454 0 0 3 0x14280 nfsidl nfsio 3931 138360 22026 0 3 0x82 wait syz-executor 72199 467229 22026 0 2 0xc82 syz-executor 65957 251446 22026 0 2 0xc82 syz-executor 33704 477634 22026 0 2 0x2 syz-executor 90274 427666 22026 0 3 0x82 nanoslp syz-executor 22026 231816 15336 0 3 0x82 kqread syz-executor 15336 175737 62345 0 3 0x10008a sigsusp ksh 62345 306950 42905 0 3 0x98 kqread sshd-session 42905 37727 68860 0 3 0x92 kqread sshd-session 68860 364360 1 0 3 0x88 kqread sshd 28162 352861 67465 73 3 0x1100090 kqread syslogd 67465 516946 1 0 3 0x100082 sbwait syslogd 56912 62894 1 0 3 0x100080 kqread resolvd 99961 259163 7001 77 3 0x100092 kqread dhcpleased 34223 229631 7001 77 3 0x100092 kqread dhcpleased 7001 456625 1 0 3 0x80 kqread dhcpleased 69297 405699 0 0 3 0x14200 bored smr 97803 64147 0 0 2 0x14200 zerothread 36909 169722 0 0 3 0x14200 aiodoned aiodoned 98399 243320 0 0 3 0x14200 syncer update 50781 74583 0 0 3 0x14200 cleaner cleaner 33566 372271 0 0 3 0x14200 reaper reaper 65635 453032 0 0 3 0x14200 pgdaemon pagedaemon 72546 478273 0 0 3 0x14200 bored viomb 90392 521734 0 0 3 0x40014200 acpi0 acpi0 18620 46954 0 0 3 0x14200 bored softnet0 5608 342025 0 0 3 0x14200 bored systqmp 49184 194219 0 0 3 0x14200 bored systq 51368 69652 0 0 2 0x40014200 softclock 82833 464974 0 0 3 0x40014200 idle0 1 497479 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10241 11291K 12279K 166960K 18806 0 pcb 17 20K 23K 166960K 1486 0 rtable 234 13K 13K 166960K 1433 0 pf 38 14K 20K 166960K 384 0 ifaddr 40 7K 8K 166960K 267 0 ifgroup 62 2K 2K 166960K 427 0 sysctl 4 1K 9K 166960K 133 0 counters 36 18K 18K 166960K 338 0 ioctlops 0 0K 4K 166960K 1120 0 iov 0 0K 32K 166960K 356 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1555 98K 98K 166960K 5660 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 9K 166960K 48 0 VM map 2 1K 1K 166960K 2 0 sem 23 37K 37K 166960K 161 0 dirhash 12 2K 2K 166960K 51 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 14 49K 236K 166960K 3583 0 sigio 0 0K 0K 166960K 250 0 proc 65 67K 91K 166960K 1465 0 subproc 72 4K 4K 166960K 282 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 477 0 in_multi 74 5K 7K 166960K 485 0 ether_multi 1 0K 0K 166960K 44 0 mrt 2 0K 0K 166960K 28 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 289 1288K 1288K 166960K 289 0 exec 0 0K 1K 166960K 1068 0 fusefs mount 1 32K 32K 166960K 1 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 210 167K 204K 166960K 31056 0 UVM aobj 94 11K 11K 166960K 114 0 pinsyscall 37 74K 94K 166960K 5340 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 206 0 NDP 13 0K 2K 166960K 190 0 temp 85 8672K 8940K 166960K 133537 0 kqueue 14 22K 32K 166960K 598 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 120 435 0 432 2 0 2 2 0 8 1 rtentry 136 457 0 376 4 0 4 4 0 8 0 unpcb 144 2778 0 2759 10 3 7 7 0 8 5 syncache 336 36 0 36 2 1 1 1 0 8 1 tcpqe 32 28 0 28 2 1 1 1 0 8 1 tcpcb 736 1814 0 1805 14 6 8 8 0 8 5 arp 96 73 0 58 1 0 1 1 0 8 0 ipq 40 10 0 10 1 0 1 1 0 8 1 ipqe 40 16 0 16 1 0 1 1 0 8 1 inpcb 328 5407 0 5395 29 19 10 15 0 8 8 ip6q 72 11 0 10 1 0 1 1 0 8 0 ip6af 40 20 0 19 1 0 1 1 0 8 0 nd6 112 104 0 85 1 0 1 1 0 8 0 pkpcb 40 18 0 18 2 1 1 1 0 8 1 kcovpl 48 31 0 23 1 0 1 1 0 8 0 mppekey 1024 1 0 0 1 0 1 1 0 8 0 ppxss 1072 248 0 247 2 1 1 1 0 8 0 pppxif 1384 84 0 83 2 1 1 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pfrktable 1344 7 0 7 2 1 1 1 0 8 1 pfstkey 128 2 0 2 1 1 0 1 0 8 0 pfstate 384 1 0 1 1 1 0 1 0 8 0 pfrule 1344 7 0 6 1 0 1 1 0 8 0 rttmr 136 8 0 8 2 1 1 1 0 8 1 art_heap8 4096 6 0 0 6 0 6 6 0 8 0 art_heap4 256 2087 0 1716 33 5 28 33 0 8 4 art_table 40 2093 0 1716 6 1 5 6 0 8 0 art_node 32 450 0 376 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semupl 112 4 0 4 2 1 1 1 0 8 1 semapl 112 154 0 133 1 0 1 1 0 8 0 shmpl 112 104 0 15 3 0 3 3 0 8 0 dirhash 1024 43 0 26 3 0 3 3 0 8 0 dino2pl 256 7833 0 6295 97 0 97 97 0 8 0 ffsino 256 7833 0 6295 97 0 97 97 0 8 0 nchpl 144 12402 0 10636 66 0 66 66 0 8 0 rtmask 32 34 0 34 2 1 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 50017 0 50015 1 0 1 1 0 8 0 vcpupl 3904 3 0 1 1 0 1 1 0 8 0 vmpool 808 7 0 5 1 0 1 1 0 8 0 kstatmem 264 250 0 224 2 0 2 2 0 8 0 scsiplug 72 15 0 15 2 1 1 1 0 8 1 scxspl 216 55592 0 55592 15 7 8 8 1 8 8 plimitpl 152 961 0 943 1 0 1 1 0 8 0 sigapl 424 3868 0 3807 11 3 8 8 0 8 0 knotepl 120 129489 0 129438 53 41 12 21 0 8 8 kqueuepl 184 1471 0 1460 7 3 4 4 0 8 3 pipepl 304 728 0 701 8 5 3 8 0 8 0 fdescpl 448 3805 0 3778 5 1 4 5 0 8 0 filepl 120 30550 0 30332 21 6 15 15 0 8 5 lockfpl 104 1602 0 1600 3 1 2 2 0 8 1 lockfspl 48 420 0 418 1 0 1 1 0 8 0 sessionpl 144 72 0 63 1 0 1 1 0 8 0 pgrppl 48 160 0 143 1 0 1 1 0 8 0 ucredpl 104 4960 0 4948 1 0 1 1 0 8 0 zombiepl 144 3810 0 3807 1 0 1 1 0 8 0 processpl 1152 3868 0 3807 6 1 5 5 0 8 0 procpl 664 8423 0 8360 10 2 8 8 0 8 1 sosppl 176 25 0 25 1 0 1 1 0 8 1 sockpl 552 8796 0 8762 30 17 13 18 0 8 8 mcl64k 65536 253 0 253 2 1 1 1 0 8 1 mcl16k 16384 7 0 7 2 1 1 1 0 8 1 mcl12k 12288 4 0 4 1 0 1 1 0 8 1 mcl9k 9216 4 0 4 2 1 1 1 0 8 1 mcl8k 8192 98 0 98 2 1 1 1 0 8 1 mcl4k 4096 6772 0 6718 14 5 9 13 0 8 2 mcl2k2 2112 3 0 3 2 1 1 1 0 8 1 mcl2k 2048 5384 0 5380 7 4 3 5 0 8 1 mtagpl 96 344 0 231 3 0 3 3 0 8 0 mbufpl 256 40308 0 40064 27 5 22 24 0 8 2 bufpl 280 21782 0 15561 445 0 445 445 0 8 0 anonpl 24 528735 0 525592 99 30 69 69 0 187 25 amapchunkpl 152 110675 0 110168 59 13 46 46 0 158 22 amappl16 200 9330 0 9298 60 46 14 26 0 8 8 amappl15 192 19 0 19 1 1 0 1 0 8 0 amappl14 184 11 0 11 2 1 1 1 0 8 1 amappl13 176 730 0 729 1 0 1 1 0 8 0 amappl12 168 4359 0 4322 3 0 3 3 0 8 1 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 44 0 34 1 0 1 1 0 8 0 amappl9 144 248 0 247 1 0 1 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 262 0 261 1 0 1 1 0 8 0 amappl6 120 572 0 559 1 0 1 1 0 8 0 amappl5 112 94 0 85 1 0 1 1 0 8 0 amappl4 104 628 0 603 1 0 1 1 0 8 0 amappl3 96 22311 0 22229 4 0 4 4 0 8 0 amappl2 88 947 0 884 2 0 2 2 0 8 0 amappl1 80 32369 0 31762 18 1 17 17 0 8 1 amappl 88 29260 0 29127 5 0 5 5 0 92 0 uvmvnodes 80 190 0 0 4 0 4 4 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma4096 4096 4 0 4 2 1 1 1 0 8 1 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 128 263 0 263 2 1 1 1 0 8 1 dma64 64 9 0 9 2 1 1 1 0 8 1 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 72 113 0 20 2 0 2 2 0 8 0 uaddrrnd 24 3805 0 3778 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3805 0 3778 1 0 1 1 0 8 0 vmmpekpl 168 29077 0 29018 3 0 3 3 0 8 0 vmmpepl 168 248066 0 246308 119 11 108 108 0 357 14 vmsppl 368 3804 0 3777 5 1 4 4 0 8 1 rwobjpl 40 62043 0 60856 18 0 18 18 0 8 2 pdppl 4096 7631 0 7566 173 102 71 79 0 8 6 pvpl 32 1607123 0 1598429 192 32 160 160 0 265 40 pmappl 216 3811 0 3782 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 499 0 136 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:438 panic(ffffffff8337c60e) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ba533,ffffffff833a5488,4f4,ffffffff833eae91) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagedeactivate(fffffd8006f5a100) at uvm_pagedeactivate+0x2d6 sys/uvm/uvm_page.c:1265 uvn_flush(fffffd807d6b3a18,0,0,14) at uvn_flush+0x43b sys/uvm/uvm_vnode.c:668 uvn_detach(fffffd807d6b3a18) at uvn_detach+0x18e sys/uvm/uvm_vnode.c:371 uvm_unmap_detach(ffff80003c993140,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364 uvm_map_teardown(fffffd806cb2bd00) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2525 exit1(ffff80002a86b268,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a86b268,ffff80003c993300,ffff80003c993250) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c993300) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c993300) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71a1365c6a80, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8337c60e) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ba533,ffffffff833a5488,4f4,ffffffff833eae91) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagedeactivate(fffffd8006f5a100) at uvm_pagedeactivate+0x2d6 sys/uvm/uvm_page.c:1265 uvn_flush(fffffd807d6b3a18,0,0,14) at uvn_flush+0x43b sys/uvm/uvm_vnode.c:668 uvn_detach(fffffd807d6b3a18) at uvn_detach+0x18e sys/uvm/uvm_vnode.c:371 uvm_unmap_detach(ffff80003c993140,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1364 uvm_map_teardown(fffffd806cb2bd00) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2525 exit1(ffff80002a86b268,0,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a86b268,ffff80003c993300,ffff80003c993250) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c993300) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c993300) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71a1365c6a80, count: -12