panic: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_page.c", line 1250 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(ffffffff833b6118) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f17ac,ffffffff8333fd58,4e2,ffffffff8333fd8d) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd80093ffe08) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806cc44b90,6e6aa344000,6e6aa743000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806cc44b90,fffffd806c5eb0d0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 uvm_map_teardown(fffffd806cc44b90) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cc44b90) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2491 exit1(ffff8000fffeaa80,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff8000fffeaa80,ffff80002fbd6de0,ffff80002fbd6d30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002fbd6de0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002fbd6de0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7350779d5cc0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: kernel diagnostic assertion "pg->wire_count != 0" failed: file "/syzkaller/managers/setuid/kernel/sys/uvm/uvm_page.c", line 1250 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b6118) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f17ac,ffffffff8333fd58,4e2,ffffffff8333fd8d) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd80093ffe08) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806cc44b90,6e6aa344000,6e6aa743000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806cc44b90,fffffd806c5eb0d0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 uvm_map_teardown(fffffd806cc44b90) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cc44b90) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2491 exit1(ffff8000fffeaa80,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff8000fffeaa80,ffff80002fbd6de0,ffff80002fbd6d30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002fbd6de0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002fbd6de0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7350779d5cc0, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002fbd6a00 rbx 0xffff8000299eee07 rdx 0 rcx 0xffff8000fffeaa80 rax 0xffff8000299edff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe28b0d04ea75270f r11 0x56dd4cd05614df91 r12 0xffff8000299eec08 r13 0 r14 0 r15 0x1 rip 0xffffffff8146e915 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002fbd69f0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=357192 pid=85390 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=74, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffeaa80 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000fffeb248,0xffffffff839de808 process=0xffff80003c0204f0 user=0xffff80002fbd1000, vmspace=0xfffffd806cc44b90 estcpu=24, cpticks=9, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52741 48527 14773 32767 3 0x90 piperd syz-executor 50251 282450 37836 32767 3 0x90 piperd syz-executor 42078 165783 29029 32767 3 0x90 piperd syz-executor 57610 164467 44797 32767 3 0x90 nanoslp syz-executor 17858 273481 14126 32767 3 0x90 piperd syz-executor 20067 502062 95188 32767 3 0x90 piperd syz-executor 29029 463720 74596 0 3 0x82 wait syz-executor 14773 508018 74596 0 3 0x82 wait syz-executor 14126 252022 74596 0 3 0x82 wait syz-executor 95188 233903 74596 0 3 0x82 wait syz-executor 37836 254469 74596 0 3 0x82 wait syz-executor 12942 145297 74596 0 3 0x82 wait syz-executor 44797 467057 74596 0 3 0x82 wait syz-executor 74596 32151 15386 0 3 0x82 nanoslp syz-executor 15386 132033 53296 0 3 0x10008a sigsusp ksh 53296 101839 14295 0 3 0x98 kqread sshd-session 14295 366415 79675 0 3 0x92 kqread sshd-session 16746 284935 1 0 3 0x100083 ttyin getty 79675 373430 1 0 3 0x88 kqread sshd 72188 136830 7058 73 3 0x1100090 kqread syslogd 7058 440850 1 0 3 0x100082 sbwait syslogd 55983 508343 1 0 3 0x100080 kqread resolvd 89900 7053 71199 77 3 0x100092 kqread dhcpleased 23312 508595 71199 77 3 0x100092 kqread dhcpleased 71199 365995 1 0 3 0x80 kqread dhcpleased 84628 421061 0 0 3 0x14200 bored smr 34905 78014 0 0 3 0x14200 pgzero zerothread 42666 483527 0 0 3 0x14200 aiodoned aiodoned 78288 123147 0 0 3 0x14200 syncer update 83466 154660 0 0 3 0x14200 cleaner cleaner 14595 292863 0 0 3 0x14200 reaper reaper 85273 384352 0 0 3 0x14200 pgdaemon pagedaemon 65203 348161 0 0 3 0x14200 bored viomb 58082 423439 0 0 3 0x40014200 acpi0 acpi0 75522 317586 0 0 3 0x40014200 idle1 6501 515411 0 0 3 0x14200 bored softnet1 38617 259248 0 0 3 0x14200 bored softnet0 15216 248373 0 0 3 0x14200 bored systqmp 76658 101467 0 0 3 0x14200 bored systq 35583 370703 0 0 3 0x14200 tmoslp softclockmp 76785 131368 0 0 3 0x40014200 tmoslp softclock 63292 154740 0 0 7 0x40014200 idle0 1 468886 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11055 12017K 12034K 166960K 12149 0 pcb 17 14K 16K 166960K 19 0 rtable 217 6K 7K 166960K 368 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 2 1K 9K 166960K 7 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 43 0 iov 0 0K 16K 166960K 26 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1336 84K 84K 166960K 1736 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 25 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 113K 166960K 588 0 sigio 0 0K 0K 166960K 12 0 proc 58 99K 147K 166960K 533 0 subproc 63 3K 4K 166960K 207 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 91 0 in_multi 88 6K 7K 166960K 112 0 ether_multi 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 413 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 206 184K 204K 166960K 6713 0 UVM aobj 15 2K 2K 166960K 15 0 pinsyscall 37 74K 105K 166960K 1656 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 27 0 temp 46 8673K 8738K 166960K 5828 0 kqueue 13 20K 26K 166960K 99 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 129 0 126 3 2 1 3 0 8 0 rtentry 176 117 0 17 6 0 6 6 0 8 0 unpcb 144 450 0 435 3 2 1 3 0 8 0 syncache 336 9 0 9 1 1 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 392 0 386 10 4 6 7 0 8 5 arp 136 18 0 2 1 0 1 1 0 8 0 ipq 40 3 0 1 1 0 1 1 0 8 0 ipqe 40 5 0 3 1 0 1 1 0 8 0 inpcb 328 798 0 789 10 4 6 10 0 8 4 nd6 152 30 0 8 2 0 2 2 0 8 0 kcovpl 48 23 0 16 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 471 0 60 30 1 29 30 0 8 0 art_table 40 472 0 60 5 0 5 5 0 8 0 art_node 32 117 0 26 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semapl 112 23 0 13 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2374 0 844 96 0 96 96 0 8 0 ffsino 296 2374 0 844 118 0 118 118 0 8 0 nchpl 144 3147 0 1449 64 0 64 64 0 8 0 vnodes 216 2590 0 0 144 0 144 144 0 8 0 namei 1024 10033 0 10033 2 1 1 2 0 8 1 percpumem 16 50 0 1 1 0 1 1 0 8 0 kstatmem 264 24 0 2 2 0 2 2 0 8 0 scxspl 216 9677 0 9677 10 8 2 8 1 8 2 plimitpl 152 172 0 149 2 0 2 2 0 8 1 sigapl 424 844 0 799 7 0 7 7 0 8 0 knotepl 120 326 0 0 10 0 10 10 0 8 0 kqueuepl 224 136 0 127 1 0 1 1 0 8 0 pipepl 344 258 0 231 9 6 3 9 0 8 0 fdescpl 528 828 0 800 3 0 3 3 0 8 0 filepl 160 5373 0 5183 19 7 12 19 0 8 3 lockfpl 104 103 0 101 1 0 1 1 0 8 0 lockfspl 48 31 0 29 1 0 1 1 0 8 0 sessionpl 144 42 0 27 1 0 1 1 0 8 0 pgrppl 48 70 0 48 1 0 1 1 0 8 0 ucredpl 104 1347 0 1329 1 0 1 1 0 8 0 zombiepl 144 801 0 799 1 0 1 1 0 8 0 processpl 1232 844 0 799 5 0 5 5 0 8 0 procpl 664 1493 0 1448 7 1 6 7 0 8 1 sockpl 752 1381 0 1354 14 5 9 13 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 110 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 1 0 0 1 0 1 1 0 8 0 mbufpl 256 247 0 0 16 0 16 16 0 8 0 bufpl 280 5510 0 119 386 0 386 386 0 8 0 anonpl 32 9367 0 0 78 2 76 77 0 246 0 amapchunkpl 152 21449 0 20816 31 1 30 30 0 158 0 amappl16 200 3316 0 3292 23 17 6 23 0 8 2 amappl15 192 33 0 32 1 0 1 1 0 8 0 amappl14 184 6 0 6 2 1 1 1 0 8 1 amappl13 176 397 0 395 1 0 1 1 0 8 0 amappl12 168 1174 0 1136 3 0 3 3 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 42 0 32 1 0 1 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 37 0 35 1 0 1 1 0 8 0 amappl7 128 77 0 76 1 0 1 1 0 8 0 amappl6 120 343 0 331 1 0 1 1 0 8 0 amappl5 112 81 0 73 1 0 1 1 0 8 0 amappl4 104 404 0 380 1 0 1 1 0 8 0 amappl3 96 3560 0 3491 3 0 3 3 0 8 0 amappl2 88 982 0 911 2 0 2 2 0 8 0 amappl1 80 11934 0 11410 14 0 14 14 0 8 0 amappl 88 5924 0 5790 5 0 5 5 0 92 0 uvmvnodes 80 114 0 0 3 0 3 3 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 14 0 0 1 0 1 1 0 8 0 uaddrrnd 24 828 0 799 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 828 0 799 1 0 1 1 0 8 0 vmmpekpl 168 9054 0 9012 3 0 3 3 0 8 0 vmmpepl 168 61757 0 60096 108 9 99 108 0 357 8 vmsppl 488 827 0 799 7 2 5 6 0 8 0 rwobjpl 80 20086 0 19194 29 3 26 29 0 8 0 pdppl 4096 1663 0 1598 105 24 81 91 0 8 16 pvpl 32 28138 0 0 227 0 227 227 0 265 0 pmappl 256 827 0 799 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 292 0 34 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83875ff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffffffff83875ff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{0}> trace x86_ipi_db(ffffffff83875ff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffffffff83875ff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5 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:438 panic(ffffffff833b6118) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f17ac,ffffffff8333fd58,4e2,ffffffff8333fd8d) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd80093ffe08) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806cc44b90,6e6aa344000,6e6aa743000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806cc44b90,fffffd806c5eb0d0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 uvm_map_teardown(fffffd806cc44b90) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cc44b90) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2491 exit1(ffff8000fffeaa80,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff8000fffeaa80,ffff80002fbd6de0,ffff80002fbd6d30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002fbd6de0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002fbd6de0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7350779d5cc0, count: 4 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833b6118) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833f17ac,ffffffff8333fd58,4e2,ffffffff8333fd8d) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd80093ffe08) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806cc44b90,6e6aa344000,6e6aa743000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806cc44b90,fffffd806c5eb0d0,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1860 uvm_map_teardown(fffffd806cc44b90) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806cc44b90) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2491 exit1(ffff8000fffeaa80,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff8000fffeaa80,ffff80002fbd6de0,ffff80002fbd6d30) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002fbd6de0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002fbd6de0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7350779d5cc0, count: -11