login: panic: amap_pp_adjref: negative reference count Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 59567 15685 0 0 0 0 syz-executor.0 *205822 15685 0 0 0x4000000 1K syz-executor.0 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(fffffd8063245698,7f0,200,1) at amap_pp_adjref+0x59e sys/uvm/uvm_amap.c:829 uvm_mapent_clone(ffff800000a9b400,0,200000,7f0000,7,7) at uvm_mapent_clone+0x14c sys/uvm/uvm_map.c:3733 uvm_share(ffff800000a9b400,0,7,fffffd807f0085c0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a9b400,0,7,fffffd807f0085c0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800021b77c08,ffff800020abfb40) 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(fffffd806e316680,c5005601,ffff800000a9a800,1,fffffd807f7c6900,ffff800020abfb40) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80737b72f8,c5005601,ffff800000a9a800,ffff800020abfb40) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abfb40,ffff800021b8bc58,ffff800021b8bca0) at sys_ioctl+0x5b9 syscall(ffff800021b8bd20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b8bd20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x752e2fc44a0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic amap_pp_adjref: negative reference count ddb{1}> 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(fffffd8063245698,7f0,200,1) at amap_pp_adjref+0x59e sys/uvm/uvm_amap.c:829 uvm_mapent_clone(ffff800000a9b400,0,200000,7f0000,7,7) at uvm_mapent_clone+0x14c sys/uvm/uvm_map.c:3733 uvm_share(ffff800000a9b400,0,7,fffffd807f0085c0,20800000,200000) at uvm_share+0x4b4 uvm_mapent_share sys/uvm/uvm_map.c:3767 [inline] uvm_share(ffff800000a9b400,0,7,fffffd807f0085c0,20800000,200000) at uvm_share+0x4b4 sys/uvm/uvm_map.c:3668 vm_impl_init_vmx(ffff800021b77c08,ffff800020abfb40) 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(fffffd806e316680,c5005601,ffff800000a9a800,1,fffffd807f7c6900,ffff800020abfb40) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80737b72f8,c5005601,ffff800000a9a800,ffff800020abfb40) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020abfb40,ffff800021b8bc58,ffff800021b8bca0) at sys_ioctl+0x5b9 syscall(ffff800021b8bd20) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b8bd20) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x752e2fc44a0, count: -12 ddb{1}> show registers rdi 0 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800021b8b5b0 rbx 0xffff800021b8b660 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800023d82000 rax 0xffff800000a49680 r8 0xffffffff81ecb56f kprintf+0x16f r9 0x1 r10 0x25 r11 0x2caf38d00711c432 r12 0x3000000008 r13 0xffff800021b8b5c0 r14 0x100 r15 0x1 rip 0xffffffff816fb918 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b8b5a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=205822 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020abe508,0xffff800020abea08 process=0xffff800020adc700 user=0xffff800021b86000, vmspace=0xfffffd807f0085c0 estcpu=36, cpticks=17126, pctcpu=0.0 user=0, sys=17126, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 15685 59567 75831 0 7 0 syz-executor.0 *15685 205822 75831 0 7 0x4000000 syz-executor.0 1753 479466 42647 0 2 0 syz-executor.1 1753 388778 42647 0 3 0x4000080 fsleep syz-executor.1 1753 433875 42647 0 2 0x4000000 syz-executor.1 75831 116986 26649 0 3 0x82 nanosleep syz-executor.0 26762 39816 0 0 3 0x14200 acct acct 84084 353383 0 0 3 0x14200 bored sosplice 42647 274076 26649 0 3 0x82 nanosleep syz-executor.1 26649 156030 53525 0 3 0x82 thrsleep syz-fuzzer 26649 327825 53525 0 3 0x4000082 thrsleep syz-fuzzer 26649 388274 53525 0 3 0x4000082 thrsleep syz-fuzzer 26649 420180 53525 0 3 0x4000082 thrsleep syz-fuzzer 26649 220805 53525 0 3 0x4000082 thrsleep syz-fuzzer 26649 394065 53525 0 3 0x4000082 thrsleep syz-fuzzer 26649 232257 53525 0 3 0x4000082 thrsleep syz-fuzzer 26649 389609 53525 0 3 0x4000082 thrsleep syz-fuzzer 26649 506609 53525 0 3 0x4000082 thrsleep syz-fuzzer 26649 480958 53525 0 3 0x4000082 kqread syz-fuzzer 53525 248782 73026 0 3 0x10008a pause ksh 73026 344683 68270 0 3 0x92 select sshd 99079 255179 1 0 3 0x100083 ttyin getty 68270 207867 1 0 3 0x80 select sshd 9679 358952 90483 74 3 0x100092 bpf pflogd 90483 386178 1 0 3 0x80 netio pflogd 16518 328567 21602 73 3 0x100090 kqread syslogd 21602 21351 1 0 3 0x100082 netio syslogd 20174 443975 1 77 3 0x100090 poll dhclient 30102 2447 1 0 3 0x80 poll dhclient 60685 156701 0 0 2 0x14200 zerothread 89818 66191 0 0 3 0x14200 aiodoned aiodoned 24037 470671 0 0 3 0x14200 syncer update 10178 146368 0 0 3 0x14200 cleaner cleaner 56863 168041 0 0 3 0x14200 reaper reaper 57845 299712 0 0 3 0x14200 pgdaemon pagedaemon 61271 395422 0 0 3 0x14200 bored crynlk 78917 496632 0 0 3 0x14200 bored crypto 43073 302986 0 0 3 0x40014200 acpi0 acpi0 13883 244499 0 0 3 0x40014200 idle1 48473 11029 0 0 3 0x14200 bored softnet 85923 18801 0 0 3 0x14200 bored systqmp 66041 315361 0 0 3 0x14200 bored systq 66839 372301 0 0 3 0x40014200 bored softclock 99256 57807 0 0 3 0x40014200 idle0 46241 417069 0 0 3 0x14200 bored smr 1 255509 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 15685 (syz-executor.0) thread 0xffff800020abfb40 (205822) shared rwlock vmmaplk r = 0 (0xfffffd807f0085d8) #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 (0xffff800000a9b418) #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 (0xffffffff826646c8) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9495 6531K 6662K 78643K 10742 0 0 pcb 13 8K 8K 78643K 34 0 0 rtable 88 3K 4K 78643K 333 0 0 ifaddr 55 11K 12K 78643K 99 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 1 2K 4K 78643K 1472 0 0 iov 0 0K 16K 78643K 17 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1217 76K 77K 78643K 1310 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 4 0 0 VM map 3 1K 1K 78643K 3 0 0 sem 12 1K 1K 78643K 29 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 6 17K 25K 78643K 143 0 0 proc 60 63K 95K 78643K 523 0 0 subproc 32 2K 2K 78643K 68 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 9 0 0 in_multi 22 1K 2K 78643K 58 0 0 ether_multi 1 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 36 159K 159K 78643K 36 0 0 exec 0 0K 1K 78643K 249 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 121 35K 35K 78643K 1430 0 0 UVM aobj 35 4K 4K 78643K 35 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 3 0K 0K 78643K 41 0 0 NDP 9 0K 0K 78643K 24 0 0 temp 89 3544K 3609K 78643K 14940 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 10 0 6 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 65 0 31 2 0 2 2 0 8 0 unpcb 120 69 0 59 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 82 0 82 1 1 0 1 0 8 0 tcpcb 544 31 0 26 1 0 1 1 0 8 0 inpcb 280 343 0 334 3 0 3 3 0 8 2 nd6 48 8 0 6 1 0 1 1 0 8 0 ppxss 1128 5 0 5 1 0 1 1 0 8 1 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 17 0 0 1 0 1 1 0 8 0 pfstkey 112 17 0 0 1 0 1 1 0 8 0 pfstate 328 17 0 0 2 0 2 2 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 256 301 0 129 14 0 14 14 0 8 0 art_table 32 302 0 129 2 0 2 2 0 8 0 art_node 16 64 0 33 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 8 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 27 0 17 1 0 1 1 0 8 0 shmpl 112 33 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1583 0 177 46 0 46 46 0 8 0 ffsino 272 1583 0 177 95 0 95 95 0 8 1 nchpl 144 1969 0 365 60 0 60 60 0 8 0 uvmvnodes 72 1696 0 0 31 0 31 31 0 8 0 vnodes 208 1696 0 0 90 0 90 90 0 8 0 namei 1024 5464 0 5464 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 1 0 0 1 0 1 1 0 8 0 scxspl 192 5528 0 5528 7 1 6 6 0 8 6 plimitpl 152 21 0 13 1 0 1 1 0 8 0 sigapl 432 335 0 319 3 1 2 3 0 8 0 futexpl 56 2194 0 2193 1 0 1 1 0 8 0 knotepl 112 84 0 65 1 0 1 1 0 8 0 kqueuepl 104 12 0 10 1 0 1 1 0 8 0 pipepl 160 236 0 215 2 0 2 2 0 8 1 fdescpl 488 336 0 319 3 0 3 3 0 8 0 filepl 152 2181 0 2072 6 0 6 6 0 8 1 lockfpl 104 46 0 45 1 0 1 1 0 8 0 lockfspl 48 16 0 15 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 134 0 125 1 0 1 1 0 8 0 zombiepl 144 319 0 319 1 0 1 1 0 8 1 processpl 896 353 0 319 4 0 4 4 0 8 0 procpl 632 564 0 518 5 0 5 5 0 8 1 srpgc 64 6 0 6 1 0 1 1 0 8 1 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 384 443 0 422 6 0 6 6 0 8 3 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 195 0 0 24 0 24 24 0 8 0 mtagpl 80 7 0 0 1 0 1 1 0 8 0 mbufpl 256 218 0 0 14 0 14 14 0 8 0 bufpl 256 6548 0 1309 328 0 328 328 0 8 0 anonpl 16 53165 0 35676 80 1 79 79 0 124 0 amapchunkpl 152 1938 0 1773 9 1 8 9 0 158 0 amappl16 192 1555 0 480 54 0 54 54 0 8 0 amappl15 184 27 0 27 1 0 1 1 0 8 1 amappl14 176 60 0 55 1 0 1 1 0 8 0 amappl12 160 20 0 19 2 1 1 1 0 8 0 amappl11 152 93 0 76 1 0 1 1 0 8 0 amappl10 144 48 0 39 1 0 1 1 0 8 0 amappl9 136 623 0 620 1 0 1 1 0 8 0 amappl8 128 205 0 168 2 0 2 2 0 8 0 amappl7 120 76 0 69 1 0 1 1 0 8 0 amappl6 112 86 0 79 1 0 1 1 0 8 0 amappl5 104 148 0 134 1 0 1 1 0 8 0 amappl4 96 588 0 556 1 0 1 1 0 8 0 amappl3 88 112 0 106 1 0 1 1 0 8 0 amappl2 80 1652 0 1570 3 1 2 3 0 8 0 amappl1 72 17659 0 17184 25 15 10 20 0 8 0 amappl 80 848 0 796 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 34 0 0 1 0 1 1 0 8 0 uaddrrnd 24 337 0 319 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 337 0 319 1 0 1 1 0 8 0 vmmpekpl 168 6861 0 6829 2 0 2 2 0 8 0 vmmpepl 168 50921 0 48553 144 3 141 141 0 357 38 vmsppl 368 335 0 319 2 0 2 2 0 8 0 pdppl 4096 681 0 638 6 0 6 6 0 8 0 pvpl 32 169098 0 148299 190 1 189 190 0 265 5 pmappl 232 336 0 319 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 496 0 3 15 0 15 15 0 8 0