panic: kernel diagnostic assertion "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/main/ker nel/sys/uvm/uvm_page.c", line 1267 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *347786 1862 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8337b3d0) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ba87a,ffffffff833a49ed,4f3,ffffffff833e9e0d) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagedeactivate(fffffd8006cd1380) at uvm_pagedeactivate+0x347 sys/uvm/uvm_page.c:1264 uvn_flush(fffffd806a37abf8,0,2000,4) at uvn_flush+0x43b sys/uvm/uvm_vnode.c:668 uvm_map_clean(fffffd807eb82a10,200000000000,200000004000,4) at uvm_map_clean+0x7c7 sys/uvm/uvm_map.c:4484 syscall(ffff800038117d60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038117d60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe31fd16c0d0, 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 "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_page.c", line 1267 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8337b3d0) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ba87a,ffffffff833a49ed,4f3,ffffffff833e9e0d) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagedeactivate(fffffd8006cd1380) at uvm_pagedeactivate+0x347 sys/uvm/uvm_page.c:1264 uvn_flush(fffffd806a37abf8,0,2000,4) at uvn_flush+0x43b sys/uvm/uvm_vnode.c:668 uvm_map_clean(fffffd807eb82a10,200000000000,200000004000,4) at uvm_map_clean+0x7c7 sys/uvm/uvm_map.c:4484 syscall(ffff800038117d60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038117d60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe31fd16c0d0, count: -8 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800038117990 rbx 0x4 rdx 0 rcx 0 rax 0xffff80002a7aa568 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6eeecd6e44fc6c7f r11 0x4ae6eed8ee0f66b6 r12 0 r13 0x304000c __kernel_phys_base+0x204000c r14 0 r15 0x1 rip 0xffffffff81d1ca85 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800038117980 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=347786 pid=1862 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7aad30,0xffff80002a7ab508 process=0xffff80003c9f2420 user=0xffff800038112000, vmspace=0xfffffd807eb82a10 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 38445 110849 45600 0 2 0x10 syz-executor 38445 417439 45600 0 3 0x4000090 fsleep syz-executor 1862 312759 3343 0 2 0 syz-executor * 1862 347786 3343 0 7 0x4000000 syz-executor 85152 65896 83038 0 2 0 syz-executor 85152 159831 83038 0 3 0x4000080 fsleep syz-executor 85437 211073 80241 0 2 0 syz-executor 85437 352062 80241 0 3 0x4000080 fsleep syz-executor 69227 248808 86709 8192 3 0x90 nanoslp syz-executor 69227 395452 86709 8192 3 0x4000090 kqsel syz-executor 69227 410646 86709 8192 3 0x4000090 fsleep syz-executor 89261 489203 86606 0 2 0 syz-executor 89261 88490 86606 0 3 0x4000080 fsleep syz-executor 37906 287483 67374 0 3 0x80 nanoslp syz-executor 37906 523022 67374 0 3 0x4000080 ttyretype syz-executor 37906 412095 67374 0 3 0x4000080 fsleep syz-executor 37906 66656 67374 0 3 0x4000080 fsleep syz-executor 80241 376205 68304 0 3 0x82 nanoslp syz-executor 86606 285496 68304 0 3 0x82 nanoslp syz-executor 64756 520220 0 0 3 0x14200 acct acct 66273 114349 72424 0 3 0x82 sbwait sshd-session 67374 79486 68304 0 3 0x82 nanoslp syz-executor 27763 510295 1 0 3 0x100083 ttyopn getty 56211 139339 72424 0 3 0x82 sbwait sshd-session 99077 205588 68304 0 3 0x82 nanoslp syz-executor 86709 15946 68304 0 3 0x82 nanoslp syz-executor 83038 467492 68304 0 3 0x82 nanoslp syz-executor 45600 334509 68304 0 3 0x82 nanoslp syz-executor 3343 459983 68304 0 3 0x82 nanoslp syz-executor 68304 314709 95058 0 3 0x82 kqread syz-executor 95058 32539 83998 0 3 0x10008a sigsusp ksh 83998 378004 69875 0 3 0x98 kqread sshd-session 69875 469868 72424 0 3 0x92 kqread sshd-session 72424 192717 1 0 3 0x88 kqread sshd 2693 199163 78252 73 3 0x1100090 kqread syslogd 78252 328487 1 0 3 0x100082 sbwait syslogd 51362 123674 1 0 3 0x100080 kqread resolvd 47636 87805 82449 77 3 0x100092 kqread dhcpleased 59785 35176 82449 77 3 0x100092 kqread dhcpleased 82449 399008 1 0 3 0x80 kqread dhcpleased 71227 214216 0 0 3 0x14200 bored smr 58362 424294 0 0 2 0x14200 zerothread 92268 278390 0 0 3 0x14200 aiodoned aiodoned 38557 329001 0 0 3 0x14200 syncer update 58819 365122 0 0 3 0x14200 cleaner cleaner 64692 99054 0 0 3 0x14200 reaper reaper 8473 228489 0 0 3 0x14200 pgdaemon pagedaemon 92105 118593 0 0 3 0x14200 bored viomb 34365 387161 0 0 3 0x40014200 acpi0 acpi0 28429 440186 0 0 3 0x14200 bored softnet0 22278 464123 0 0 3 0x14200 bored systqmp 57544 488104 0 0 3 0x14200 bored systq 5945 24575 0 0 3 0x40014200 tmoslp softclock 13674 386527 0 0 3 0x40014200 idle0 1 368300 0 0 3 0x80082 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 10215 11093K 11720K 166960K 14439 0 pcb 20 20K 22K 166960K 660 0 rtable 203 8K 9K 166960K 881 0 pf 35 14K 21K 166960K 191 0 ifaddr 39 7K 8K 166960K 125 0 ifgroup 53 2K 2K 166960K 200 0 sysctl 4 1K 9K 166960K 21 0 counters 33 17K 18K 166960K 110 0 ioctlops 0 0K 4K 166960K 370 0 iov 0 0K 48K 166960K 227 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1542 97K 97K 166960K 3404 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 27 0 VM map 2 1K 1K 166960K 2 0 sem 29 6K 6K 166960K 70 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 1830 0 sigio 0 0K 0K 166960K 78 0 proc 61 59K 108K 166960K 780 0 subproc 72 4K 4K 166960K 118 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 331 0 in_multi 78 5K 7K 166960K 222 0 ether_multi 1 0K 0K 166960K 25 0 mrt 2 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 577 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 259 172K 181K 166960K 17316 0 UVM aobj 53 14K 16K 166960K 59 0 pinsyscall 43 86K 94K 166960K 3060 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 213 0 NDP 11 0K 2K 166960K 87 0 temp 147 8673K 8795K 166960K 61813 0 kqueue 15 24K 34K 166960K 351 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 120 179 0 175 2 0 2 2 0 8 1 rtentry 136 274 0 192 4 0 4 4 0 8 0 unpcb 144 1623 0 1603 11 5 6 6 0 8 5 syncache 336 14 0 14 2 1 1 1 0 8 1 tcpqe 32 4 0 4 2 1 1 1 0 8 1 tcpcb 736 909 0 895 16 6 10 14 0 8 8 arp 96 30 0 16 1 0 1 1 0 8 0 ipq 40 12 0 9 1 0 1 1 0 8 0 ipqe 40 26 0 23 1 0 1 1 0 8 0 inpcb 328 2514 0 2493 26 15 11 18 0 8 8 ip6q 72 8 0 4 1 0 1 1 0 8 0 ip6af 40 13 0 8 1 0 1 1 0 8 0 nd6 112 50 0 31 1 0 1 1 0 8 0 pkpcb 40 9 0 9 2 1 1 1 0 8 1 kcovpl 48 13 0 5 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1072 60 0 60 2 1 1 1 0 8 1 pppxif 1384 9 0 9 2 1 1 1 0 8 1 pfrktable 1344 2 0 1 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfrule 1344 5 0 4 1 0 1 1 0 8 0 rttmr 136 4 0 4 2 1 1 1 0 8 1 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 933 0 568 31 4 27 31 0 8 4 art_table 40 937 0 568 5 0 5 5 0 8 0 art_node 32 272 0 200 2 0 2 2 0 8 1 sysvmsgpl 40 52 0 45 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 58 0 31 1 0 1 1 0 8 0 shmpl 112 50 0 5 2 0 2 2 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 4873 0 3372 95 0 95 95 0 8 0 ffsino 256 4873 0 3372 95 0 95 95 0 8 0 nchpl 144 7383 0 5675 64 0 64 64 0 8 0 rtmask 32 7 0 7 2 1 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 25671 0 25671 3 2 1 2 0 8 1 vcpupl 3904 5 0 0 1 0 1 1 0 8 0 vmpool 800 6 0 1 1 0 1 1 0 8 0 kstatmem 264 122 0 100 3 0 3 3 0 8 1 scsiplug 72 8 0 8 2 1 1 1 0 8 1 scxspl 216 30354 0 30354 15 7 8 8 1 8 8 plimitpl 152 581 0 564 1 0 1 1 0 8 0 sigapl 424 2130 0 2084 8 2 6 8 0 8 0 knotepl 120 86843 0 86546 32 22 10 17 0 8 1 kqueuepl 184 591 0 579 3 2 1 3 0 8 0 pipepl 304 304 0 277 5 2 3 5 0 8 0 fdescpl 448 2084 0 2052 5 1 4 5 0 8 0 filepl 120 15500 0 15267 20 5 15 15 0 8 5 lockfpl 104 1154 0 1151 6 3 3 4 0 8 2 lockfspl 48 269 0 266 1 0 1 1 0 8 0 sessionpl 144 37 0 27 1 0 1 1 0 8 0 pgrppl 48 68 0 49 1 0 1 1 0 8 0 ucredpl 104 2893 0 2879 1 0 1 1 0 8 0 zombiepl 144 2085 0 2084 1 0 1 1 0 8 0 processpl 1152 2130 0 2084 5 0 5 5 0 8 0 procpl 664 4525 0 4469 8 2 6 7 0 8 0 sosppl 176 6 0 6 2 1 1 1 0 8 1 sockpl 552 4375 0 4330 33 20 13 19 0 8 8 mcl64k 65536 111 0 111 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 2 1 1 1 0 8 1 mcl12k 12288 2 0 2 2 1 1 1 0 8 1 mcl9k 9216 9 0 9 2 1 1 1 0 8 1 mcl8k 8192 26 0 26 2 1 1 1 0 8 1 mcl4k 4096 4665 0 4608 16 7 9 15 0 8 1 mcl2k2 2112 4 0 4 2 1 1 1 0 8 1 mcl2k 2048 2713 0 2701 5 1 4 4 0 8 2 mtagpl 96 57 0 30 1 0 1 1 0 8 0 mbufpl 256 22920 0 22749 25 5 20 20 0 8 4 bufpl 280 11564 0 5343 445 0 445 445 0 8 0 anonpl 24 318967 0 315339 69 16 53 53 0 187 18 amapchunkpl 152 59419 0 58898 41 8 33 33 0 158 7 amappl16 200 5957 0 5917 45 33 12 15 0 8 8 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 3 0 3 1 1 0 1 0 8 0 amappl13 176 463 0 462 1 0 1 1 0 8 0 amappl12 168 2481 0 2438 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 47 0 37 1 0 1 1 0 8 0 amappl9 144 257 0 257 1 1 0 1 0 8 0 amappl8 136 26 0 25 1 0 1 1 0 8 0 amappl7 128 104 0 102 1 0 1 1 0 8 0 amappl6 120 346 0 332 1 0 1 1 0 8 0 amappl5 112 78 0 68 1 0 1 1 0 8 0 amappl4 104 456 0 429 1 0 1 1 0 8 0 amappl3 96 11991 0 11876 4 0 4 4 0 8 0 amappl2 88 631 0 562 2 0 2 2 0 8 0 amappl1 80 18222 0 17507 17 0 17 17 0 8 1 amappl 88 16185 0 16010 5 0 5 5 0 92 0 uvmvnodes 80 154 0 0 4 0 4 4 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma256 256 7 0 7 2 1 1 1 0 8 1 dma128 128 257 0 257 2 1 1 1 0 8 1 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 58 0 6 1 0 1 1 0 8 0 uaddrrnd 24 2084 0 2052 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2084 0 2052 1 0 1 1 0 8 0 vmmpekpl 168 17333 0 17292 3 0 3 3 0 8 0 vmmpepl 168 136477 0 134342 114 11 103 107 0 357 8 vmsppl 368 2083 0 2052 4 1 3 4 0 8 0 rwobjpl 40 36014 0 34738 16 1 15 16 0 8 0 pdppl 4096 4186 0 4111 125 50 75 80 0 8 0 pvpl 32 910289 0 899816 161 27 134 134 0 265 28 pmappl 216 2089 0 2053 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 440 0 84 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(ffffffff8337b3d0) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ba87a,ffffffff833a49ed,4f3,ffffffff833e9e0d) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagedeactivate(fffffd8006cd1380) at uvm_pagedeactivate+0x347 sys/uvm/uvm_page.c:1264 uvn_flush(fffffd806a37abf8,0,2000,4) at uvn_flush+0x43b sys/uvm/uvm_vnode.c:668 uvm_map_clean(fffffd807eb82a10,200000000000,200000004000,4) at uvm_map_clean+0x7c7 sys/uvm/uvm_map.c:4484 syscall(ffff800038117d60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038117d60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe31fd16c0d0, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8337b3d0) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ba87a,ffffffff833a49ed,4f3,ffffffff833e9e0d) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pagedeactivate(fffffd8006cd1380) at uvm_pagedeactivate+0x347 sys/uvm/uvm_page.c:1264 uvn_flush(fffffd806a37abf8,0,2000,4) at uvn_flush+0x43b sys/uvm/uvm_vnode.c:668 uvm_map_clean(fffffd807eb82a10,200000000000,200000004000,4) at uvm_map_clean+0x7c7 sys/uvm/uvm_map.c:4484 syscall(ffff800038117d60) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038117d60) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe31fd16c0d0, count: -8