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 476676 54978 73 0x1100010 0 0 syslogd db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83452b9c) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348efb7,ffffffff833e61fd,4e2,ffffffff833e6232) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8008c85938) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806c83c7d0,c3ccd43000,c3ccd44000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806c83c7d0,fffffd806c54f448,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffd806c83c7d0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806c83c7d0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80003c3f2fb8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c3f2fb8,ffff8000387c25e0,ffff8000387c2530) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000387c25e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000387c25e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738b89fe8f50, 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(ffffffff83452b9c) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348efb7,ffffffff833e61fd,4e2,ffffffff833e6232) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8008c85938) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806c83c7d0,c3ccd43000,c3ccd44000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806c83c7d0,fffffd806c54f448,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffd806c83c7d0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806c83c7d0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80003c3f2fb8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c3f2fb8,ffff8000387c25e0,ffff8000387c2530) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000387c25e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000387c25e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738b89fe8f50, count: -11 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000387c2200 rbx 0xffff8000299aee07 rdx 0 rcx 0xffff80003c3f2fb8 rax 0xffff8000299adff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x387416fe8d9edd4c r11 0x552f0f45fe141b2b r12 0xffff8000299aec08 r13 0 r14 0 r15 0x1 rip 0xffffffff81e7d8b5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000387c21f0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=343288 pid=47439 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=79, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c3f2fb8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c3f3a18,0xffff80003c3f22d0 process=0xffff80003c3de1d0 user=0xffff8000387bd000, vmspace=0xfffffd806c83c7d0 estcpu=29, cpticks=5, pctcpu=0.2, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51418 499027 84187 32767 2 0x10 syz-executor 51418 341204 84187 32767 2 0x4000090 syz-executor 19406 442019 21090 32767 2 0xc90 syz-executor 19406 499705 21090 32767 3 0x4000098 kqpoll syz-executor 19406 420518 21090 32767 3 0x4000090 fsleep syz-executor 15062 14270 70517 32767 2 0x10 syz-executor 15062 179091 70517 32767 3 0x4000090 fsleep syz-executor 91171 257527 3753 32767 2 0xc90 syz-executor 91171 350610 3753 32767 3 0x4000090 fifor syz-executor 91171 128127 3753 32767 3 0x4000090 fsleep syz-executor 21090 244201 12995 32767 2 0xc90 syz-executor 12995 188341 46629 0 3 0x82 wait syz-executor 28629 85978 7110 32767 3 0x90 wait syz-executor 3753 26387 80692 32767 2 0xc90 syz-executor 12219 87910 85982 32767 2 0xc90 syz-executor 84187 99284 11071 32767 2 0xc90 syz-executor 70517 77853 20395 32767 3 0x90 nanoslp syz-executor 15207 442090 43064 32767 2 0x10 syz-executor 43730 258626 46802 32767 2 0x10 syz-executor 43064 521872 46629 0 3 0x82 wait syz-executor 11071 361512 46629 0 3 0x82 wait syz-executor 80692 114195 46629 0 3 0x82 wait syz-executor 20395 212393 46629 0 3 0x82 wait syz-executor 46802 405449 46629 0 3 0x82 wait syz-executor 85982 14740 46629 0 3 0x82 wait syz-executor 7110 84600 46629 0 3 0x82 wait syz-executor 46629 407663 33476 0 3 0x82 kqread syz-executor 33476 364186 35138 0 3 0x10008a sigsusp ksh 35138 297908 93303 0 3 0x98 kqread sshd-session 93303 493697 46015 0 3 0x92 kqread sshd-session 75774 166077 1 0 3 0x100083 ttyin getty 46015 511950 1 0 3 0x88 kqread sshd 54978 476676 64592 73 7 0x1100010 syslogd 64592 422440 1 0 3 0x100082 sbwait syslogd 76978 437389 1 0 3 0x100080 kqread resolvd 19600 466396 8866 77 3 0x100092 kqread dhcpleased 33124 451381 8866 77 3 0x100092 kqread dhcpleased 8866 219283 1 0 3 0x80 kqread dhcpleased 66770 926 0 0 3 0x14200 bored smr 55894 458262 0 0 3 0x14200 pgzero zerothread 64524 305797 0 0 3 0x14200 aiodoned aiodoned 89108 410932 0 0 3 0x14200 syncer update 27323 402844 0 0 3 0x14200 cleaner cleaner 68533 313254 0 0 3 0x14200 reaper reaper 8861 335569 0 0 3 0x14200 pgdaemon pagedaemon 62619 242708 0 0 3 0x14200 bored viomb 74297 447542 0 0 3 0x40014200 acpi0 acpi0 28394 389024 0 0 3 0x40014200 idle1 99300 468280 0 0 3 0x14200 bored softnet1 5594 68510 0 0 3 0x14200 bored softnet0 46391 476808 0 0 3 0x14200 bored systqmp 79736 81749 0 0 3 0x14200 bored systq 98300 180236 0 0 3 0x14200 tmoslp softclockmp 95303 228259 0 0 3 0x40014200 tmoslp softclock 16128 336075 0 0 3 0x40014200 idle0 1 90926 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 15207 (syz-executor) thread 0xffff8000fffee548 (442090) exclusive rrwlock inode r = 0 (0xfffffd806c4eb0c8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x98a sys/kern/vfs_lookup.c:567 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d07d680) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 43730 (syz-executor) thread 0xffff8000fffeea78 (258626) exclusive rrwlock inode r = 0 (0xfffffd806c4eb1f0) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3143 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d85d1d8) #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 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3128 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11058 12019K 12034K 166960K 12152 0 pcb 17 12K 12K 166960K 17 0 rtable 237 6K 7K 166960K 402 0 pf 31 16K 16K 166960K 33 0 ifaddr 42 7K 7K 166960K 48 0 ifgroup 50 2K 2K 166960K 54 0 sysctl 4 1K 9K 166960K 11 0 counters 70 37K 37K 166960K 72 0 ioctlops 0 0K 4K 166960K 47 0 iov 0 0K 18K 166960K 33 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1289 81K 81K 166960K 1509 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 43 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 23 85K 121K 166960K 622 0 sigio 0 0K 0K 166960K 78 0 proc 58 99K 147K 166960K 584 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 82 0 in_multi 99 7K 7K 166960K 125 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 489 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 253 162K 191K 166960K 7565 0 UVM aobj 55 6K 6K 166960K 58 0 pinsyscall 44 88K 112K 166960K 1772 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 40 0 NDP 11 0K 2K 166960K 30 0 temp 54 9074K 9150K 166960K 6194 0 kqueue 13 20K 32K 166960K 133 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 69 0 66 1 0 1 1 0 8 0 rtentry 176 126 0 16 6 0 6 6 0 8 0 unpcb 144 800 0 783 8 0 8 8 0 8 7 syncache 336 15 0 15 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 252 0 246 4 1 3 4 0 8 2 arp 136 20 0 2 1 0 1 1 0 8 0 ipq 40 5 0 1 1 0 1 1 0 8 0 ipqe 40 8 0 3 1 0 1 1 0 8 0 inpcb 328 567 0 558 5 0 5 5 0 8 3 ip6q 72 2 0 1 1 0 1 1 0 8 0 ip6af 40 5 0 2 1 0 1 1 0 8 0 nd6 152 31 0 7 2 0 2 2 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 505 0 53 29 0 29 29 0 8 0 art_table 40 506 0 53 5 0 5 5 0 8 0 art_node 32 126 0 26 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 3 1 0 1 1 0 8 0 semapl 112 39 0 29 1 0 1 1 0 8 0 shmpl 112 55 0 3 2 0 2 2 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2375 0 910 92 0 92 92 0 8 0 ffsino 296 2375 0 910 114 0 114 114 0 8 0 nchpl 144 3269 0 1575 64 0 64 64 0 8 0 vnodes 216 2465 0 0 137 0 137 137 0 8 0 namei 1024 10681 0 10680 1 0 1 1 0 8 0 percpumem 16 51 0 1 1 0 1 1 0 8 0 kstatmem 264 27 0 2 2 0 2 2 0 8 0 scxspl 216 10751 0 10751 9 4 5 8 1 8 5 plimitpl 152 143 0 116 2 0 2 2 0 8 0 sigapl 424 919 0 867 7 0 7 7 0 8 0 knotepl 120 309 0 0 10 0 10 10 0 8 0 kqueuepl 224 166 0 156 2 0 2 2 0 8 1 pipepl 344 169 0 142 4 1 3 4 0 8 0 fdescpl 528 903 0 868 3 0 3 3 0 8 0 filepl 160 5451 0 5240 18 0 18 18 0 8 7 lockfpl 104 252 0 250 1 0 1 1 0 8 0 lockfspl 48 47 0 45 1 0 1 1 0 8 0 sessionpl 144 116 0 100 1 0 1 1 0 8 0 pgrppl 48 136 0 112 1 0 1 1 0 8 0 ucredpl 104 1026 0 1007 1 0 1 1 0 8 0 zombiepl 144 869 0 867 1 0 1 1 0 8 0 processpl 1232 919 0 867 5 0 5 5 0 8 0 procpl 664 1727 0 1669 7 0 7 7 0 8 1 sosppl 176 7 0 7 1 0 1 1 0 8 1 sockpl 752 1446 0 1417 29 17 12 23 0 8 8 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 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 106 0 0 14 0 14 14 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 366 0 0 23 0 23 23 0 8 0 bufpl 280 5934 0 115 416 0 416 416 0 8 0 anonpl 32 9588 0 0 78 0 78 78 0 246 0 amapchunkpl 152 25726 0 24890 53 0 53 53 0 158 19 amappl16 200 3268 0 3241 20 8 12 15 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 416 0 415 1 0 1 1 0 8 0 amappl13 176 149 0 139 1 0 1 1 0 8 0 amappl12 168 1144 0 1109 2 0 2 2 0 8 0 amappl11 160 3 0 2 1 0 1 1 0 8 0 amappl10 152 62 0 52 1 0 1 1 0 8 0 amappl9 144 263 0 262 2 1 1 1 0 8 0 amappl8 136 102 0 100 1 0 1 1 0 8 0 amappl7 128 149 0 138 1 0 1 1 0 8 0 amappl6 120 168 0 166 1 0 1 1 0 8 0 amappl5 112 108 0 100 1 0 1 1 0 8 0 amappl4 104 293 0 277 1 0 1 1 0 8 0 amappl3 96 4693 0 4556 4 0 4 4 0 8 0 amappl2 88 603 0 550 2 0 2 2 0 8 0 amappl1 80 14257 0 13679 17 1 16 17 0 8 0 amappl 88 6736 0 6546 6 0 6 6 0 92 0 uvmvnodes 80 119 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 57 0 3 1 0 1 1 0 8 0 uaddrrnd 24 903 0 867 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 903 0 867 1 0 1 1 0 8 0 vmmpekpl 168 9807 0 9768 2 0 2 2 0 8 0 vmmpepl 168 69002 0 66977 111 1 110 111 0 357 15 vmsppl 488 902 0 867 7 1 6 6 0 8 0 rwobjpl 80 22843 0 21800 28 0 28 28 0 8 0 pdppl 4096 1813 0 1734 121 36 85 95 0 8 6 pvpl 32 30108 0 0 243 0 243 243 0 265 0 pmappl 256 902 0 867 4 1 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 303 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(ffffffff83922ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff839ca480) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839ca480) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 vn_read(fffffd806f4cedc8,ffff80002a27a5e8,0) at vn_read+0x56 sys/kern/vfs_vnops.c:357 dofilereadv(ffff8000ffffcd00,a,ffff80002a27a5e8,0,ffff80002a27a6a0) at dofilereadv+0x25a sys/kern/sys_generic.c:252 sys_read(ffff8000ffffcd00,ffff80002a27a750,ffff80002a27a6a0) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a27a750) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a27a750) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a823e6dadd0, count: 5 ddb{0}> trace x86_ipi_db(ffffffff83922ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff839ca480) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839ca480) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 vn_read(fffffd806f4cedc8,ffff80002a27a5e8,0) at vn_read+0x56 sys/kern/vfs_vnops.c:357 dofilereadv(ffff8000ffffcd00,a,ffff80002a27a5e8,0,ffff80002a27a6a0) at dofilereadv+0x25a sys/kern/sys_generic.c:252 sys_read(ffff8000ffffcd00,ffff80002a27a750,ffff80002a27a6a0) at sys_read+0xa2 sys/kern/sys_generic.c:172 syscall(ffff80002a27a750) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a27a750) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7a823e6dadd0, count: -10 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(ffffffff83452b9c) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348efb7,ffffffff833e61fd,4e2,ffffffff833e6232) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8008c85938) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806c83c7d0,c3ccd43000,c3ccd44000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806c83c7d0,fffffd806c54f448,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffd806c83c7d0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806c83c7d0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80003c3f2fb8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c3f2fb8,ffff8000387c25e0,ffff8000387c2530) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000387c25e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000387c25e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738b89fe8f50, count: 4 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83452b9c) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348efb7,ffffffff833e61fd,4e2,ffffffff833e6232) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageunwire(fffffd8008c85938) at uvm_pageunwire+0x17d sys/uvm/uvm_page.c:1249 uvm_fault_unwire_locked(fffffd806c83c7d0,c3ccd43000,c3ccd44000) at uvm_fault_unwire_locked+0x33a sys/uvm/uvm_fault.c:1790 uvm_unmap_kill_entry_withlock(fffffd806c83c7d0,fffffd806c54f448,0) at uvm_unmap_kill_entry_withlock+0x81 sys/uvm/uvm_map.c:1866 uvm_map_teardown(fffffd806c83c7d0) at uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] uvm_map_teardown(fffffd806c83c7d0) at uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 exit1(ffff80003c3f2fb8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c3f2fb8,ffff8000387c25e0,ffff8000387c2530) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000387c25e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000387c25e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x738b89fe8f50, count: -11