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 269268 45679 32767 0x10 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83451eeb) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348e215,ffffffff833e6f87,4e2,ffffffff833e6fbc) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8004be0c40) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806c8d6b98,24d9423c000,24d9423d000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806c8d6b98,fffffd806c7b4738,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffd806c8d6b98) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806c8d6b98) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80003b7dda18,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003b7dda18,ffff80002f395c10,ffff80002f395b60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f395c10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f395c10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e5523e6c70, 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(ffffffff83451eeb) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348e215,ffffffff833e6f87,4e2,ffffffff833e6fbc) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8004be0c40) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806c8d6b98,24d9423c000,24d9423d000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806c8d6b98,fffffd806c7b4738,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffd806c8d6b98) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806c8d6b98) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80003b7dda18,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003b7dda18,ffff80002f395c10,ffff80002f395b60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f395c10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f395c10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e5523e6c70, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002f395830 rbx 0xffff8000299aee07 rdx 0 rcx 0xffff80003b7dda18 rax 0xffff8000299adff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1da590e8b0c7fd93 r11 0xa8bf17a364539d56 r12 0xffff8000299aec08 r13 0 r14 0 r15 0x1 rip 0xffffffff81bc1f85 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002f395820 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=6789 pid=98480 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=76, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003b7dda18 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003b7dd4e8,0xffff80003b7dcfc8 process=0xffff80003b7e5830 user=0xffff80002f390000, vmspace=0xfffffd806c8d6b98 estcpu=26, cpticks=38, pctcpu=0.36, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 46306 151069 74132 32767 2 0x10 syz-executor 46306 65296 74132 32767 3 0x4000090 kqsel syz-executor 46306 179826 74132 32767 3 0x4000090 fsleep syz-executor 79616 137587 45679 32767 2 0x10 syz-executor 79616 127127 45679 32767 3 0x4000090 fsleep syz-executor 79616 49661 45679 32767 3 0x4000090 fsleep syz-executor 79616 64912 45679 32767 3 0x4000090 fsleep syz-executor 18616 383197 32908 32767 2 0x10 syz-executor 18616 388832 32908 32767 3 0x4000090 fsleep syz-executor 39222 150689 66886 32767 2 0xc90 syz-executor 72041 93538 6531 32767 3 0x90 piperd syz-executor 74132 380697 77452 32767 2 0xc90 syz-executor 74138 33483 59073 32767 3 0x90 piperd syz-executor 12861 359235 28268 32767 3 0x90 piperd syz-executor 45679 269268 66248 32767 7 0x10 syz-executor 32908 129740 10203 32767 2 0x10 syz-executor 6531 232310 19423 0 3 0x82 wait syz-executor 66886 95069 19423 0 3 0x82 wait syz-executor 77452 248851 19423 0 3 0x82 wait syz-executor 28268 382778 19423 0 3 0x82 wait syz-executor 10203 95035 19423 0 3 0x82 wait syz-executor 66248 475303 19423 0 3 0x82 wait syz-executor 59073 348821 19423 0 3 0x82 wait syz-executor 19423 290801 73162 0 3 0x82 nanoslp syz-executor 73162 38325 83276 0 3 0x10008a sigsusp ksh 83276 264607 16630 0 3 0x98 kqread sshd-session 16630 161213 44678 0 3 0x92 kqread sshd-session 69269 43999 1 0 3 0x100083 ttyin getty 44678 67740 1 0 3 0x88 kqread sshd 86523 217674 73980 73 3 0x1100090 kqread syslogd 73980 304173 1 0 3 0x100082 sbwait syslogd 21415 360110 1 0 3 0x100080 kqread resolvd 70907 118282 87064 77 3 0x100092 kqread dhcpleased 99156 356361 87064 77 3 0x100092 kqread dhcpleased 87064 523829 1 0 3 0x80 kqread dhcpleased 43027 255316 0 0 3 0x14200 bored smr 66986 347787 0 0 2 0x14200 zerothread 97333 43078 0 0 3 0x14200 aiodoned aiodoned 30533 238230 0 0 3 0x14200 syncer update 31653 101396 0 0 3 0x14200 cleaner cleaner 67448 30398 0 0 3 0x14200 reaper reaper 57045 315372 0 0 3 0x14200 pgdaemon pagedaemon 99717 255952 0 0 3 0x14200 bored viomb 31987 5559 0 0 3 0x40014200 acpi0 acpi0 48169 441759 0 0 3 0x40014200 idle1 41055 181536 0 0 3 0x14200 bored softnet1 47650 411453 0 0 3 0x14200 bored softnet0 87232 343336 0 0 3 0x14200 bored systqmp 32056 492523 0 0 3 0x14200 bored systq 27853 56975 0 0 3 0x14200 tmoslp softclockmp 67425 500433 0 0 3 0x40014200 tmoslp softclock 67287 448889 0 0 3 0x40014200 idle0 1 97724 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 11052 12016K 12034K 166960K 12146 0 pcb 17 12K 12K 166960K 17 0 rtable 217 6K 7K 166960K 359 0 pf 29 16K 16K 166960K 31 0 ifaddr 38 6K 7K 166960K 44 0 ifgroup 46 2K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 2K 166960K 33 0 iov 0 0K 16K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1296 82K 82K 166960K 1513 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 10 0 dirhash 15 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 121K 166960K 336 0 sigio 0 0K 0K 166960K 5 0 proc 58 99K 180K 166960K 503 0 subproc 63 3K 5K 166960K 198 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 18 0 in_multi 88 6K 7K 166960K 103 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 385 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 221 169K 201K 166960K 4586 0 UVM aobj 10 2K 2K 166960K 10 0 pinsyscall 40 80K 111K 166960K 1447 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 12 0 NDP 10 0K 2K 166960K 27 0 temp 70 9083K 9149K 166960K 4771 0 kqueue 13 20K 30K 166960K 62 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 120 107 0 104 3 0 3 3 0 8 2 rtentry 176 114 0 14 6 0 6 6 0 8 1 unpcb 144 124 0 106 2 1 1 2 0 8 0 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpqe 32 4 0 4 1 0 1 1 0 8 1 tcpcb 736 152 0 146 7 0 7 7 0 8 6 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 376 0 364 7 0 7 7 0 8 5 ip6q 72 51 0 48 1 0 1 1 0 8 0 ip6af 40 100 0 97 1 0 1 1 0 8 0 nd6 152 27 0 5 1 0 1 1 0 8 0 kcovpl 48 22 0 15 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 458 0 48 29 2 27 29 0 8 0 art_table 40 459 0 48 5 0 5 5 0 8 0 art_node 32 114 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 2 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 112 7 0 4 1 0 1 1 0 8 0 shmpl 112 7 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 2 3 0 3 3 0 8 0 dino2pl 256 1798 0 317 93 0 93 93 0 8 0 ffsino 296 1798 0 317 114 0 114 114 0 8 0 nchpl 144 2171 0 469 64 0 64 64 0 8 0 vnodes 216 2005 0 0 112 0 112 112 0 8 0 namei 1024 6925 0 6925 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 7096 0 7096 4 3 1 3 1 8 1 plimitpl 152 82 0 59 2 0 2 2 0 8 1 sigapl 424 605 0 557 7 0 7 7 0 8 1 knotepl 120 338 0 0 11 0 11 11 0 8 0 kqueuepl 224 82 0 72 1 0 1 1 0 8 0 pipepl 344 177 0 150 3 0 3 3 0 8 0 fdescpl 528 589 0 558 3 0 3 3 0 8 0 filepl 160 2829 0 2627 15 0 15 15 0 8 5 lockfpl 104 31 0 28 1 0 1 1 0 8 0 lockfspl 48 13 0 10 1 0 1 1 0 8 0 sessionpl 144 43 0 28 1 0 1 1 0 8 0 pgrppl 48 68 0 46 1 0 1 1 0 8 0 ucredpl 104 345 0 327 1 0 1 1 0 8 0 zombiepl 144 558 0 557 1 0 1 1 0 8 0 processpl 1232 605 0 557 5 0 5 5 0 8 0 procpl 664 851 0 797 6 0 6 6 0 8 0 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 752 607 0 574 16 4 12 16 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 18 0 0 1 0 1 1 0 8 0 mbufpl 256 344 0 0 22 0 22 22 0 8 0 bufpl 280 4695 0 103 328 0 328 328 0 8 0 anonpl 32 7825 0 0 63 0 63 63 0 246 0 amapchunkpl 152 13377 0 12651 30 2 28 28 0 158 0 amappl16 200 1938 0 1918 5 3 2 5 0 8 0 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 404 0 403 1 0 1 1 0 8 0 amappl13 176 126 0 116 1 0 1 1 0 8 0 amappl12 168 826 0 795 2 0 2 2 0 8 0 amappl11 160 6 0 5 1 0 1 1 0 8 0 amappl10 152 58 0 48 1 0 1 1 0 8 0 amappl9 144 306 0 306 1 1 0 1 0 8 0 amappl8 136 104 0 103 1 0 1 1 0 8 0 amappl7 128 146 0 135 1 0 1 1 0 8 0 amappl6 120 155 0 154 1 0 1 1 0 8 0 amappl5 112 105 0 96 1 0 1 1 0 8 0 amappl4 104 284 0 269 1 0 1 1 0 8 0 amappl3 96 2407 0 2298 5 1 4 4 0 8 0 amappl2 88 560 0 508 2 0 2 2 0 8 0 amappl1 80 12133 0 11577 19 1 18 19 0 8 3 amappl 88 3818 0 3661 5 0 5 5 0 92 0 uvmvnodes 80 99 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 589 0 557 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 589 0 557 1 0 1 1 0 8 0 vmmpekpl 168 7482 0 7434 3 0 3 3 0 8 0 vmmpepl 168 48754 0 46937 103 0 103 103 0 357 15 vmsppl 488 588 0 557 7 1 6 6 0 8 1 rwobjpl 80 17282 0 16372 27 1 26 27 0 8 2 pdppl 4096 1185 0 1114 115 34 81 95 0 8 10 pvpl 32 26688 0 0 216 0 216 216 0 265 0 pmappl 256 588 0 557 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 300 0 40 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83870ff0) 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 __mp_lock(ffffffff839d7800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d7800) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002ef8a530) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002ef8a530) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7296970e97b0, count: 9 ddb{0}> trace x86_ipi_db(ffffffff83870ff0) 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 __mp_lock(ffffffff839d7800) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839d7800) at __mp_lock+0x192 sys/kern/kern_lock.c:173 syscall(ffff80002ef8a530) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002ef8a530) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7296970e97b0, 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:438 panic(ffffffff83451eeb) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348e215,ffffffff833e6f87,4e2,ffffffff833e6fbc) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8004be0c40) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806c8d6b98,24d9423c000,24d9423d000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806c8d6b98,fffffd806c7b4738,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffd806c8d6b98) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806c8d6b98) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80003b7dda18,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003b7dda18,ffff80002f395c10,ffff80002f395b60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f395c10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f395c10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e5523e6c70, count: 4 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83451eeb) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348e215,ffffffff833e6f87,4e2,ffffffff833e6fbc) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8004be0c40) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806c8d6b98,24d9423c000,24d9423d000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806c8d6b98,fffffd806c7b4738,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffd806c8d6b98) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806c8d6b98) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80003b7dda18,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003b7dda18,ffff80002f395c10,ffff80002f395b60) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002f395c10) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002f395c10) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x77e5523e6c70, count: -11