panic: amap_pp_adjref: negative reference count 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(ffffffff834e9f3d) at panic+0x1cf sys/kern/subr_prf.c:198 amap_pp_adjref(fffff6006e64b848,1,1,ffffffff) at amap_pp_adjref+0x74c sys/uvm/uvm_amap.c:883 amap_adjref_anons(fffff6006e64b848,1,1,ffffffff,0) at amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1301 uvm_unmap_detach(ffff80002a76d5a0,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(fffff6007f231cf0) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a767a00,0,1f,1) at exit1+0x705 sys/kern/kern_exit.c:259 sigexit(ffff80002a767a00,1f) at sigexit+0x115 postsig(ffff80002a767a00,1f,ffff80002a76d7c8) at postsig+0x686 sys/kern/kern_sig.c:1763 userret(ffff80002a767a00) at userret+0x23e sys/kern/kern_sig.c:2207 syscall(ffff80002a76d8f0) at syscall+0xa56 mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff80002a76d8f0) at syscall+0xa56 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79bdd755ef80, 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: amap_pp_adjref: negative reference count ddb> show kasan No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834e9f3d) at panic+0x1cf sys/kern/subr_prf.c:198 amap_pp_adjref(fffff6006e64b848,1,1,ffffffff) at amap_pp_adjref+0x74c sys/uvm/uvm_amap.c:883 amap_adjref_anons(fffff6006e64b848,1,1,ffffffff,0) at amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1301 uvm_unmap_detach(ffff80002a76d5a0,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(fffff6007f231cf0) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a767a00,0,1f,1) at exit1+0x705 sys/kern/kern_exit.c:259 sigexit(ffff80002a767a00,1f) at sigexit+0x115 postsig(ffff80002a767a00,1f,ffff80002a76d7c8) at postsig+0x686 sys/kern/kern_sig.c:1763 userret(ffff80002a767a00) at userret+0x23e sys/kern/kern_sig.c:2207 syscall(ffff80002a76d8f0) at syscall+0xa56 mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff80002a76d8f0) at syscall+0xa56 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79bdd755ef80, count: -12 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a76d350 rbx 0xffff800000c57a20 rdx 0 rcx 0 rax 0xffff80002a767a00 r8 0x101010101010101 r9 0x8080808080808080 r10 0x36910ee8c70b5552 r11 0x38c6f3106045a1ea r12 0 r13 0x2 r14 0 r15 0x1 rip 0xffffffff817ff3d5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a76d340 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (sshd-session) tid=403418 pid=40417 tcnt=0 stat=onproc flags process=1000001a proc=2000 runpri=24, usrpri=50, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a767238,0xffff80002a7662b8 process=0xffff80002a79e410 user=0xffff80002a768000, vmspace=0xfffff6007f231cf0 estcpu=0, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 41968 279676 40852 0 3 0 0x80 fsleep syz-executor 41968 131058 40852 0 2 0 0x4000000 syz-executor 670 235968 9979 0 3 0x10 0x80 fsleep syz-executor 670 208950 9979 0 2 0x10 0x4000000 syz-executor 59995 7022 79951 0 3 0 0x80 fsleep syz-executor 59995 45107 79951 0 3 0 0x4000080 netcon syz-executor 74236 515414 65868 0 3 0 0x80 fsleep syz-executor 74236 281639 65868 0 2 0 0x4000000 syz-executor 90112 38482 80678 0 3 0x1000 0x2000 suspend syz-executor 90112 273595 80678 0 3 0x1000 0x4080000 smrbar syz-executor 50521 410394 25689 0 3 0x1010 0x2000 suspend syz-executor 50521 131078 25689 0 2 0x1010 0x4080000 syz-executor 79951 245936 91900 0 3 0x2 0x80 nanoslp syz-executor 80678 363449 91900 0 3 0x2 0x80 nanoslp syz-executor 65868 236060 91900 0 3 0x2 0x80 nanoslp syz-executor 25689 516821 91900 0 3 0x2 0x80 nanoslp syz-executor 8272 491365 91900 0 2 0x2 0xc80 syz-executor 31586 262910 91900 0 3 0x2 0x80 nanoslp syz-executor 9979 243959 91900 0 3 0x2 0x80 nanoslp syz-executor 40852 496683 91900 0 3 0x2 0x80 nanoslp syz-executor 91900 13416 70739 0 3 0x2 0x80 kqread syz-executor 70739 462663 1 0 2 0x100002 0x88 ksh 2002 377855 1 0 2 0x100003 0x80 getty 25514 198730 1 0 2 0 0x88 sshd 66736 86802 16396 73 3 0x1100010 0x80 kqread syslogd 16396 408807 1 0 2 0x100002 0x80 syslogd 86938 57046 1 0 2 0x100000 0x80 resolvd 18724 10640 87562 77 3 0x100012 0x80 kqread dhcpleased 56131 63439 87562 77 3 0x100012 0x80 kqread dhcpleased 87562 271808 1 0 2 0 0x80 dhcpleased 90127 411672 0 0 3 0x14000 0x200 bored smr 25806 443925 0 0 2 0x14000 0x200 zerothread 1150 294853 0 0 3 0x14000 0x200 aiodoned aiodoned 21248 397760 0 0 3 0x14000 0x200 syncer update 9709 370703 0 0 3 0x14000 0x200 cleaner cleaner 61109 90705 0 0 3 0x14000 0x200 reaper reaper 90449 446593 0 0 3 0x14000 0x200 pgdaemon pagedaemon 96572 334621 0 0 3 0x14000 0x200 bored viomb 34032 176231 0 0 3 0x14000 0x40000200 acpi0 acpi0 3228 443374 0 0 2 0x14000 0x200 softnet0 777 76435 0 0 3 0x14000 0x200 bored systqmp 58170 42524 0 0 3 0x14000 0x200 bored systq 15582 201599 0 0 3 0x14000 0x40000200 tmoslp softclock 3568 496441 0 0 3 0x14000 0x40000200 idle0 1 422104 0 0 2 0x2 0x80 init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11059 12347K 12372K 166960K 12310 0 pcb 17 14K 15K 166960K 55 0 rtable 250 7K 10K 166960K 418 0 pf 33 13K 17K 166960K 73 0 ifaddr 43 7K 8K 166960K 54 0 ifgroup 54 2K 2K 166960K 72 0 sysctl 1 1K 9K 166960K 8 0 counters 34 17K 18K 166960K 43 0 ioctlops 0 0K 4K 166960K 102 0 iov 0 0K 16K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1359 85K 85K 166960K 1593 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 15 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 89K 166960K 309 0 sigio 0 0K 0K 166960K 1 0 proc 60 59K 91K 166960K 514 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 13 0 in_multi 99 6K 6K 166960K 102 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 417 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 232 143K 165K 166960K 4459 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 35 70K 90K 166960K 1419 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 13 0 NDP 12 0K 2K 166960K 33 0 temp 40 9111K 9183K 166960K 8219 0 kqueue 11 16K 26K 166960K 51 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 52 0 49 1 0 1 1 0 8 0 rtentry 136 116 0 4 4 0 4 4 0 8 0 unpcb 144 130 0 116 1 0 1 1 0 8 0 syncache 336 8 0 8 1 0 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 65 0 57 2 0 2 2 0 8 1 arp 96 18 0 0 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 337 0 320 13 3 10 13 0 8 8 nd6 112 25 0 0 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 6 0 6 1 0 1 1 0 8 1 pppxif 1416 2 0 2 1 0 1 1 0 8 1 pfstscr 40 68 0 68 1 0 1 1 0 8 1 pfrktable 1344 13 0 13 1 0 1 1 0 8 1 pfanchor 1288 4 0 4 1 0 1 1 0 8 1 pftag 88 2 0 2 1 0 1 1 0 8 1 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfstkey 128 68 0 68 1 0 1 1 0 8 1 pfstate 384 34 0 34 1 0 1 1 0 8 1 pfrule 1360 3 0 3 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 498 0 6 32 0 32 32 0 8 1 art_table 40 499 0 6 6 0 6 6 0 8 1 art_node 32 116 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 11 0 3 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1928 0 472 92 0 92 92 0 8 0 ffsino 256 1928 0 472 92 0 92 92 0 8 0 nchpl 144 2320 0 620 64 0 64 64 0 8 0 vnodes 216 2161 0 0 121 0 121 121 0 8 0 namei 1024 7149 0 7148 2 0 2 2 0 8 1 pfiaddrpl 120 4 0 4 1 0 1 1 0 8 1 kstatmem 264 35 0 10 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 8829 0 8829 4 0 4 4 1 8 4 plimitpl 152 60 0 42 1 0 1 1 0 8 0 sigapl 424 607 0 564 6 0 6 6 0 8 1 knotepl 120 9779 0 9737 11 0 11 11 0 8 8 kqueuepl 184 69 0 61 1 0 1 1 0 8 0 pipepl 304 133 0 105 3 0 3 3 0 8 0 fdescpl 448 594 0 566 5 0 5 5 0 8 1 filepl 120 2691 0 2440 14 0 14 14 0 8 6 lockfpl 104 41 0 39 1 0 1 1 0 8 0 lockfspl 48 20 0 18 1 0 1 1 0 8 0 sessionpl 144 38 0 29 1 0 1 1 0 8 0 pgrppl 48 52 0 35 1 0 1 1 0 8 0 ucredpl 104 292 0 279 1 0 1 1 0 8 0 zombiepl 144 570 0 564 1 0 1 1 0 8 0 processpl 1152 607 0 564 4 0 4 4 0 8 0 procpl 664 887 0 838 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 552 529 0 495 12 0 12 12 0 8 8 mcl64k 65536 28 0 28 1 0 1 1 0 8 1 mcl16k 16384 4 0 4 1 0 1 1 0 8 1 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 10 0 10 1 0 1 1 0 8 1 mcl4k 4096 2763 0 2710 14 0 14 14 0 8 6 mcl2k 2048 250 0 248 1 0 1 1 0 8 0 mextrefs 64 137 0 136 1 0 1 1 0 8 0 mtagpl 96 5 0 5 1 0 1 1 0 8 1 mbufpl 256 6560 0 6399 23 3 20 23 0 8 7 bufpl 272 3211 0 104 208 0 208 208 0 8 0 anonpl 24 95792 0 90541 65 0 65 65 0 187 32 amapchunkpl 152 13447 0 12843 38 0 38 38 0 158 10 amappl16 200 1430 0 1342 15 2 13 15 0 8 8 amappl15 192 3 0 3 1 0 1 1 0 8 1 amappl14 184 411 0 410 1 0 1 1 0 8 0 amappl13 176 114 0 105 1 0 1 1 0 8 0 amappl12 168 835 0 807 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 0 1 1 0 8 1 amappl10 152 74 0 64 1 0 1 1 0 8 0 amappl9 144 269 0 269 1 0 1 1 0 8 1 amappl8 136 93 0 92 1 0 1 1 0 8 0 amappl7 128 151 0 140 1 0 1 1 0 8 0 amappl6 120 147 0 145 1 0 1 1 0 8 0 amappl5 112 94 0 89 1 0 1 1 0 8 0 amappl4 104 259 0 244 1 0 1 1 0 8 0 amappl3 96 2359 0 2257 3 0 3 3 0 8 0 amappl2 88 725 0 654 2 0 2 2 0 8 0 amappl1 80 10802 0 10349 13 0 13 13 0 8 1 amappl 88 3737 0 3565 5 0 5 5 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 0 8 0 dma4096 4096 2 0 2 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 594 0 566 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 594 0 566 1 0 1 1 0 8 0 vmmpekpl 168 6596 0 6561 2 0 2 2 0 8 0 vmmpepl 168 45826 0 44115 92 0 92 92 0 357 10 vmsppl 368 593 0 565 4 0 4 4 0 8 1 rwobjpl 40 15413 0 14433 13 0 13 13 0 8 1 pdppl 4096 1194 0 1130 92 26 66 78 0 8 2 pvpl 32 263138 0 253517 142 0 142 142 0 265 49 pmappl 216 593 0 565 2 0 2 2 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 579 0 29 16 0 16 16 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(ffffffff834e9f3d) at panic+0x1cf sys/kern/subr_prf.c:198 amap_pp_adjref(fffff6006e64b848,1,1,ffffffff) at amap_pp_adjref+0x74c sys/uvm/uvm_amap.c:883 amap_adjref_anons(fffff6006e64b848,1,1,ffffffff,0) at amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1301 uvm_unmap_detach(ffff80002a76d5a0,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(fffff6007f231cf0) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a767a00,0,1f,1) at exit1+0x705 sys/kern/kern_exit.c:259 sigexit(ffff80002a767a00,1f) at sigexit+0x115 postsig(ffff80002a767a00,1f,ffff80002a76d7c8) at postsig+0x686 sys/kern/kern_sig.c:1763 userret(ffff80002a767a00) at userret+0x23e sys/kern/kern_sig.c:2207 syscall(ffff80002a76d8f0) at syscall+0xa56 mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff80002a76d8f0) at syscall+0xa56 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79bdd755ef80, 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(ffffffff834e9f3d) at panic+0x1cf sys/kern/subr_prf.c:198 amap_pp_adjref(fffff6006e64b848,1,1,ffffffff) at amap_pp_adjref+0x74c sys/uvm/uvm_amap.c:883 amap_adjref_anons(fffff6006e64b848,1,1,ffffffff,0) at amap_adjref_anons+0x22d sys/uvm/uvm_amap.c:1301 uvm_unmap_detach(ffff80002a76d5a0,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1359 uvm_map_teardown(fffff6007f231cf0) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a767a00,0,1f,1) at exit1+0x705 sys/kern/kern_exit.c:259 sigexit(ffff80002a767a00,1f) at sigexit+0x115 postsig(ffff80002a767a00,1f,ffff80002a76d7c8) at postsig+0x686 sys/kern/kern_sig.c:1763 userret(ffff80002a767a00) at userret+0x23e sys/kern/kern_sig.c:2207 syscall(ffff80002a76d8f0) at syscall+0xa56 mi_syscall_return sys/sys/syscall_mi.h:203 [inline] syscall(ffff80002a76d8f0) at syscall+0xa56 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79bdd755ef80, count: -12