login: panic: amap_pp_adjref: negative reference count Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *398020 244 0 0 0x4000000 0K syz-executor.0 163442 25762 0 0x2 0x4000480 1 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 amap_pp_adjref(fffffd8062b25a08,e4,1df,1) at amap_pp_adjref+0x59e sys/uvm/uvm_amap.c:829 uvm_mapent_clone(ffff800000b08600,0,1df000,e4000,7,7) at uvm_mapent_clone+0x14c sys/uvm/uvm_map.c:3733 uvm_share(ffff800000b08600,0,7,fffffd807f007a10,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b08600,0,7,fffffd807f007a10,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b26cf0,ffff800020ab0c70) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd806e352a90,c5005601,ffff800000b0c000,1,fffffd807f7c6420,ffff800020ab0c70) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd806214ac00,c5005601,ffff800000b0c000,ffff800020ab0c70) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0c70,ffff800021b97018,ffff800021b97060) at sys_ioctl+0x5b9 syscall(ffff800021b970e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b970e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3092f60cb80, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic amap_pp_adjref: negative reference count ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 amap_pp_adjref(fffffd8062b25a08,e4,1df,1) at amap_pp_adjref+0x59e sys/uvm/uvm_amap.c:829 uvm_mapent_clone(ffff800000b08600,0,1df000,e4000,7,7) at uvm_mapent_clone+0x14c sys/uvm/uvm_map.c:3733 uvm_share(ffff800000b08600,0,7,fffffd807f007a10,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000b08600,0,7,fffffd807f007a10,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800020b26cf0,ffff800020ab0c70) at vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 vm_create() at vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] vm_create() at vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 VOP_IOCTL(fffffd806e352a90,c5005601,ffff800000b0c000,1,fffffd807f7c6420,ffff800020ab0c70) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd806214ac00,c5005601,ffff800000b0c000,ffff800020ab0c70) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020ab0c70,ffff800021b97018,ffff800021b97060) at sys_ioctl+0x5b9 syscall(ffff800021b970e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b970e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3092f60cb80, count: -12 ddb{0}> show registers rdi 0 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800021b96970 rbx 0xffff800021b96a20 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800020b66000 rax 0xffff800000a8ee40 r8 0xffffffff8194382f kprintf+0x16f r9 0x1 r10 0x25 r11 0x6b0c8369eaf368f5 r12 0x3000000008 r13 0xffff800021b96980 r14 0x100 r15 0x1 rip 0xffffffff816cef58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b96960 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=398020 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab0290,0xffff800020ab0a08 process=0xffff800020adce00 user=0xffff800021b92000, vmspace=0xfffffd807f007a10 estcpu=36, cpticks=89, pctcpu=20.28 user=0, sys=18188, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 244 282960 64561 0 2 0 syz-executor.0 * 244 398020 64561 0 7 0x4000000 syz-executor.0 99375 296090 50189 0 2 0 syz-executor.1 99375 260341 50189 0 3 0x4000080 ttyout syz-executor.1 99375 273418 50189 0 2 0x4000000 syz-executor.1 99375 478394 50189 0 3 0x4000080 fsleep syz-executor.1 99375 119811 50189 0 2 0x4000000 syz-executor.1 21459 309551 0 0 2 0x14600 acct 50189 329965 25762 0 2 0x482 syz-executor.1 64561 238498 25762 0 2 0x482 syz-executor.0 25762 274018 74270 0 3 0x82 kqread syz-fuzzer 25762 514204 74270 0 2 0x4000482 syz-fuzzer 25762 163442 74270 0 7 0x4000482 syz-fuzzer 25762 47111 74270 0 3 0x4000082 thrsleep syz-fuzzer 25762 137926 74270 0 3 0x4000082 thrsleep syz-fuzzer 25762 229742 74270 0 3 0x4000082 thrsleep syz-fuzzer 25762 30798 74270 0 3 0x4000082 thrsleep syz-fuzzer 25762 152086 74270 0 3 0x4000082 thrsleep syz-fuzzer 25762 146327 74270 0 2 0x4000482 syz-fuzzer 25762 98120 74270 0 3 0x4000082 thrsleep syz-fuzzer 74270 351114 55825 0 3 0x10008a pause ksh 55825 515269 38186 0 3 0x92 select sshd 14723 371682 1 0 3 0x100083 ttyin getty 38186 521143 1 0 3 0x80 select sshd 73866 396975 71606 74 2 0x100492 pflogd 71606 409269 1 0 3 0x80 netio pflogd 35251 448774 88839 73 2 0x100490 syslogd 88839 90451 1 0 3 0x100082 netio syslogd 16739 115718 1 77 3 0x100090 poll dhclient 46493 109699 1 0 3 0x80 poll dhclient 55597 523038 0 0 2 0x14200 zerothread 58768 57602 0 0 3 0x14200 aiodoned aiodoned 9934 450879 0 0 2 0x14200 update 61452 348841 0 0 3 0x14200 cleaner cleaner 74746 395880 0 0 3 0x14200 reaper reaper 52883 353606 0 0 3 0x14200 pgdaemon pagedaemon 62463 90368 0 0 3 0x14200 bored crynlk 69868 153461 0 0 3 0x14200 bored crypto 31506 499425 0 0 3 0x40014200 acpi0 acpi0 14098 452804 0 0 3 0x40014200 idle1 46823 319896 0 0 2 0x14200 softnet 98837 273799 0 0 2 0x14200 systqmp 5193 50034 0 0 3 0x14200 bored systq 53152 87306 0 0 2 0x40014200 softclock 89976 508524 0 0 3 0x40014200 idle0 66955 486793 0 0 3 0x14200 bored smr 1 202187 0 0 3 0x82 wait init 0 0 -1 0 2 0x10200 swapper ddb{0}> show all locks Process 244 (syz-executor.0) thread 0xffff800020ab0c70 (398020) shared rwlock vmmaplk r = 0 (0xfffffd807f007a28) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 uvm_share+0xcf vm_map_lock_read_ln sys/uvm/uvm_map.c:5365 [inline] #1 uvm_share+0xcf sys/uvm/uvm_map.c:3627 #2 vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 #3 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] #3 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 #4 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #5 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #6 sys_ioctl+0x5b9 #7 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #7 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #8 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xffff800000b08618) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5343 #3 uvm_share+0xa7 vm_map_lock_read_ln sys/uvm/uvm_map.c:5364 [inline] #3 uvm_share+0xa7 sys/uvm/uvm_map.c:3627 #4 vm_impl_init_vmx+0xf1 sys/arch/amd64/amd64/vmm.c:1270 #5 vm_create+0x1a0 vm_impl_init sys/arch/amd64/amd64/vmm.c:1385 [inline] #5 vm_create+0x1a0 sys/arch/amd64/amd64/vmm.c:1174 #6 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #7 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #8 sys_ioctl+0x5b9 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rwlock vmlistlock r = 0 (0xffff800000671478) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 vm_create+0x130 vm_impl_init sys/arch/amd64/amd64/vmm.c:1383 [inline] #1 vm_create+0x130 sys/arch/amd64/amd64/vmm.c:1174 #2 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #3 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #4 sys_ioctl+0x5b9 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82688dc0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9506 6412K 8921K 78643K 13498 0 0 pcb 13 8K 8K 78643K 63 0 0 rtable 99 5K 5K 78643K 298 0 0 ifaddr 67 13K 13K 78643K 100 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1486 0 0 iov 0 0K 16K 78643K 48 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1245 78K 79K 78643K 2010 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 5 0 0 VM map 5 2K 2K 78643K 5 0 0 sem 12 0K 1K 78643K 56 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 347 0 0 sigio 0 0K 0K 78643K 2 0 0 proc 61 63K 95K 78643K 451 0 0 subproc 32 2K 2K 78643K 34 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 20 0 0 in_multi 41 2K 2K 78643K 84 0 0 ether_multi 1 0K 0K 78643K 6 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 218 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 124 43K 43K 78643K 2040 0 0 UVM aobj 14 2K 2K 78643K 17 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 40 0 0 NDP 11 0K 0K 78643K 23 0 0 temp 131 3554K 3629K 78643K 6704 0 0 kqueue 0 0K 0K 78643K 2 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 7 0 3 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 31 0 29 1 0 1 1 0 8 0 rtentry 112 60 0 22 2 0 2 2 0 8 0 unpcb 120 133 0 123 1 0 1 1 0 8 0 syncache 264 6 0 6 2 1 1 1 0 8 1 tcpcb 544 92 0 88 1 0 1 1 0 8 0 inpcb 280 284 0 277 2 0 2 2 0 8 1 nd6 48 7 0 4 1 0 1 1 0 8 0 ppxss 1128 5 0 5 1 0 1 1 0 8 1 pffrag 232 3 0 3 1 1 0 1 0 482 0 pffrnode 88 3 0 3 1 1 0 1 0 8 0 pffrent 40 92 0 92 1 1 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 36 0 5 1 0 1 1 0 8 0 pfstkey 112 36 0 5 1 0 1 1 0 8 0 pfstate 328 36 0 5 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 345 0 134 14 0 14 14 0 8 0 art_table 32 346 0 134 2 0 2 2 0 8 0 art_node 16 59 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 6 2 1 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 52 0 42 1 0 1 1 0 8 0 shmpl 112 15 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1837 0 438 46 0 46 46 0 8 0 ffsino 272 1837 0 438 94 0 94 94 0 8 0 nchpl 144 2489 0 874 62 1 61 61 0 8 0 uvmvnodes 72 2626 0 0 48 0 48 48 0 8 0 vnodes 208 2626 0 0 139 0 139 139 0 8 0 namei 1024 7656 0 7656 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 552 3 0 0 1 0 1 1 0 8 0 scxspl 192 7077 0 7077 7 6 1 6 0 8 1 plimitpl 152 23 0 13 1 0 1 1 0 8 0 sigapl 432 545 0 529 3 1 2 3 0 8 0 futexpl 56 6342 0 6341 1 0 1 1 0 8 0 knotepl 112 74 0 55 1 0 1 1 0 8 0 kqueuepl 104 47 0 44 1 0 1 1 0 8 0 pipepl 160 276 0 257 2 0 2 2 0 8 1 fdescpl 488 546 0 529 3 0 3 3 0 8 0 filepl 152 3826 0 3720 6 0 6 6 0 8 1 lockfpl 104 56 0 55 1 0 1 1 0 8 0 lockfspl 48 18 0 17 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 224 0 215 1 0 1 1 0 8 0 zombiepl 144 529 0 529 1 0 1 1 0 8 1 processpl 896 562 0 529 4 0 4 4 0 8 0 procpl 632 1269 0 1222 5 0 5 5 0 8 1 srpgc 64 2 0 2 1 1 0 1 0 8 0 sockpl 384 450 0 431 4 0 4 4 0 8 2 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 175 0 0 21 0 21 21 0 8 0 mtagpl 80 6 0 0 1 0 1 1 0 8 0 mbufpl 256 293 0 0 18 0 18 18 0 8 0 bufpl 256 6765 0 1312 341 0 341 341 0 8 0 anonpl 16 67815 0 42574 103 1 102 102 0 124 0 amapchunkpl 152 2792 0 2541 12 2 10 10 0 158 0 amappl16 192 2622 0 1288 67 0 67 67 0 8 0 amappl15 184 379 0 374 1 0 1 1 0 8 0 amappl14 176 48 0 43 1 0 1 1 0 8 0 amappl12 160 136 0 132 2 1 1 1 0 8 0 amappl11 152 54 0 38 1 0 1 1 0 8 0 amappl10 144 23 0 16 1 0 1 1 0 8 0 amappl9 136 601 0 598 1 0 1 1 0 8 0 amappl8 128 170 0 141 2 0 2 2 0 8 0 amappl7 120 37 0 34 1 0 1 1 0 8 0 amappl6 112 60 0 52 1 0 1 1 0 8 0 amappl5 104 261 0 246 1 0 1 1 0 8 0 amappl4 96 793 0 761 1 0 1 1 0 8 0 amappl3 88 119 0 113 1 0 1 1 0 8 0 amappl2 80 3672 0 3586 3 1 2 3 0 8 0 amappl1 72 20960 0 20502 25 14 11 20 0 8 0 amappl 80 1523 0 1470 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 16 0 3 1 0 1 1 0 8 0 uaddrrnd 24 549 0 529 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 549 0 529 1 0 1 1 0 8 0 vmmpekpl 168 7948 0 7909 3 1 2 2 0 8 0 vmmpepl 168 72641 0 70038 138 16 122 135 0 357 8 vmsppl 368 545 0 529 2 0 2 2 0 8 0 pdppl 4096 1105 0 1060 6 0 6 6 0 8 0 pvpl 32 208832 0 179271 239 0 239 239 0 265 0 pmappl 232 548 0 529 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 511 0 3 15 0 15 15 0 8 0