login: panic: amap_lookup: offset out of range Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 98379 97766 0 0x2 0x4000000 0 syz-fuzzer db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82233e7e) at panic+0x15c sys/kern/subr_prf.c:207 amap_lookup(fffffd80579acef0,0) at amap_lookup+0x19b sys/uvm/uvm_amap.c:1027 uvm_map_clean(fffffd806bc09660,c003136000,c003484000,8) at uvm_map_clean+0x43a sys/uvm/uvm_map.c:4670 syscall(ffff80001d7f4bc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00015feb8, count: 9 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 amap_lookup: offset out of range ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82233e7e) at panic+0x15c sys/kern/subr_prf.c:207 amap_lookup(fffffd80579acef0,0) at amap_lookup+0x19b sys/uvm/uvm_amap.c:1027 uvm_map_clean(fffffd806bc09660,c003136000,c003484000,8) at uvm_map_clean+0x43a sys/uvm/uvm_map.c:4670 syscall(ffff80001d7f4bc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00015feb8, count: -6 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d7f4910 rbx 0xffff80001d7f49c0 rdx 0x2 rcx 0 rax 0 r8 0xffff80001d7f48d0 r9 0x1 r10 0 r11 0x36fe151a5899e1e2 r12 0x3000000008 r13 0xffff80001d7f4920 r14 0x100 r15 0x1 rip 0xffffffff817fd778 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d7f4900 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-fuzzer) pid=98379 stat=onproc flags process=2 proc=4000000 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff80001d7a8600,0xffff80001d73a128 process=0xffff8000ffff9210 user=0xffff80001d7ef000, vmspace=0xfffffd806bc09660 estcpu=0, cpticks=0, pctcpu=0.41 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 83077 348371 59591 0 2 0 syz-executor.0 83077 47774 59591 0 3 0x4000080 semwait syz-executor.0 83077 255212 59591 0 3 0x4000080 fsleep syz-executor.0 16704 114854 0 0 3 0x14200 bored sosplice 59591 479942 97766 0 3 0x82 nanosleep syz-executor.0 97766 340855 70502 0 3 0x82 thrsleep syz-fuzzer 97766 396325 70502 0 3 0x4000082 nanosleep syz-fuzzer 97766 42869 70502 0 2 0x4000002 syz-fuzzer 97766 19327 70502 0 3 0x4000082 thrsleep syz-fuzzer 97766 332508 70502 0 3 0x4000082 thrsleep syz-fuzzer *97766 98379 70502 0 7 0x4000002 syz-fuzzer 97766 18943 70502 0 3 0x4000082 thrsleep syz-fuzzer 70502 106692 27111 0 3 0x10008a pause ksh 27111 139040 84641 0 3 0x92 select sshd 6139 25487 1 0 3 0x100083 ttyin getty 84641 411298 1 0 3 0x80 select sshd 36541 409859 23668 73 3 0x100090 kqread syslogd 23668 384644 1 0 3 0x100082 netio syslogd 27251 395974 1 77 3 0x100090 poll dhclient 1740 384513 1 0 3 0x80 poll dhclient 65040 312903 0 0 3 0x14200 bored smr 77845 288384 0 0 2 0x14200 zerothread 87824 263768 0 0 3 0x14200 aiodoned aiodoned 25247 432939 0 0 3 0x14200 syncer update 26036 192879 0 0 3 0x14200 cleaner cleaner 70800 49160 0 0 3 0x14200 reaper reaper 85726 55832 0 0 3 0x14200 pgdaemon pagedaemon 5290 106398 0 0 3 0x14200 bored crynlk 84066 46181 0 0 3 0x14200 bored crypto 30 505517 0 0 3 0x40014200 acpi0 acpi0 72628 470158 0 0 3 0x14200 bored softnet 64481 82302 0 0 3 0x14200 bored systqmp 1727 349067 0 0 3 0x14200 bored systq 8994 407254 0 0 3 0x40014200 bored softclock 67609 245879 0 0 3 0x40014200 idle0 1 436103 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9462 6391K 6715K 78643K 10699 0 pcb 13 8K 8K 78643K 93 0 rtable 86 2K 3K 78643K 227 0 ifaddr 41 9K 11K 78643K 51 0 counters 20 16K 16K 78643K 21 0 ioctlops 0 0K 2K 78643K 15 0 iov 0 0K 12K 78643K 8 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1254 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 12 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 4 9K 25K 78643K 95 0 proc 49 38K 63K 78643K 360 0 subproc 16 1K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 6 0 in_multi 22 1K 2K 78643K 43 0 ether_multi 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 31 148K 148K 78643K 31 0 exec 0 0K 1K 78643K 189 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 111 14K 22K 78643K 1086 0 UVM aobj 13 2K 2K 78643K 15 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 12 0 NDP 6 0K 0K 78643K 11 0 temp 54 3031K 3097K 78643K 8232 0 kqueue 3 4K 8K 78643K 5 0 SYN cache 2 16K 16K 78643K 2 0 ddb> 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 rtpcb 80 25 0 23 1 0 1 1 0 8 0 rtentry 112 50 0 17 2 0 2 2 0 8 0 unpcb 120 71 0 63 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 18 0 18 1 0 1 1 0 8 1 tcpcb 544 30 0 26 1 0 1 1 0 8 0 inpcb 280 158 0 151 1 0 1 1 0 8 0 nd6 48 6 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 204 0 60 13 0 13 13 0 8 2 art_table 32 205 0 60 2 0 2 2 0 8 0 art_node 16 49 0 19 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 0 1 1 0 8 1 semupl 112 1 0 0 1 0 1 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 13 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1504 0 110 88 0 88 88 0 8 0 ffsino 240 1504 0 110 83 0 83 83 0 8 0 nchpl 144 1842 0 262 60 0 60 60 0 8 0 uvmvnodes 72 1576 0 0 29 0 29 29 0 8 0 vnodes 208 1576 0 0 83 0 83 83 0 8 0 namei 1024 4573 0 4573 1 0 1 1 0 8 1 scxspl 192 4946 0 4946 1 0 1 1 0 8 1 plimitpl 152 24 0 18 1 0 1 1 0 8 0 sigapl 424 282 0 254 4 0 4 4 0 8 0 futexpl 56 1620 0 1619 1 0 1 1 0 8 0 knotepl 112 63 0 50 1 0 1 1 0 8 0 kqueuepl 144 8 0 6 1 0 1 1 0 8 0 pipelkpl 16 80 0 73 1 0 1 1 0 8 0 pipepl 120 160 0 147 1 0 1 1 0 8 0 fdescpl 432 267 0 254 2 0 2 2 0 8 0 filepl 120 1444 0 1371 4 0 4 4 0 8 1 lockfpl 104 38 0 37 1 0 1 1 0 8 0 lockfspl 48 14 0 13 1 0 1 1 0 8 0 sessionpl 112 17 0 8 1 0 1 1 0 8 0 pgrppl 48 50 0 41 1 0 1 1 0 8 0 ucredpl 96 95 0 88 1 0 1 1 0 8 0 zombiepl 144 254 0 254 1 0 1 1 0 8 1 processpl 920 282 0 254 4 0 4 4 0 8 0 procpl 624 377 0 341 4 0 4 4 0 8 1 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 400 254 0 237 4 0 4 4 0 8 2 mcl64k 65536 4 0 4 1 0 1 1 0 8 1 mcl12k 12288 3 0 3 1 0 1 1 0 8 1 mcl4k 4096 13 0 13 2 1 1 1 0 8 1 mcl2k 2048 60081 0 60038 13 1 12 12 0 8 5 mtagpl 80 8 0 8 2 1 1 1 0 8 1 mbufpl 256 95988 0 95930 10 1 9 9 0 8 1 bufpl 280 3521 0 127 243 0 243 243 0 8 0 anonpl 16 43999 0 28708 75 1 74 74 0 107 10 amapchunkpl 152 1390 0 1260 8 0 8 8 0 158 2 amappl16 192 1412 0 569 51 0 51 51 0 8 8 amappl15 184 4 0 1 1 0 1 1 0 8 0 amappl14 176 25 0 20 1 0 1 1 0 8 0 amappl13 168 24 0 23 1 0 1 1 0 8 0 amappl12 160 11 0 8 1 0 1 1 0 8 0 amappl11 152 75 0 66 1 0 1 1 0 8 0 amappl10 144 42 0 37 1 0 1 1 0 8 0 amappl9 136 365 0 364 1 0 1 1 0 8 0 amappl8 128 309 0 278 2 0 2 2 0 8 0 amappl7 120 138 0 123 1 0 1 1 0 8 0 amappl6 112 29 0 24 1 0 1 1 0 8 0 amappl5 104 212 0 201 1 0 1 1 0 8 0 amappl4 96 422 0 391 1 0 1 1 0 8 0 amappl3 88 106 0 99 1 0 1 1 0 8 0 amappl2 80 1312 0 1249 2 0 2 2 0 8 0 amappl1 72 14450 0 14050 21 6 15 17 0 8 6 amappl 80 617 0 578 1 0 1 1 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 14 0 2 1 0 1 1 0 8 0 uaddrrnd 24 267 0 254 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 267 0 254 1 0 1 1 0 8 0 vmmpekpl 168 6024 0 5999 2 0 2 2 0 8 0 vmmpepl 168 39347 0 37500 113 3 110 110 0 357 26 vmsppl 272 266 0 254 2 0 2 2 0 8 1 pdppl 4096 540 0 508 6 0 6 6 0 8 1 pvpl 32 143828 0 125629 173 0 173 173 0 265 24 pmappl 200 266 0 254 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 234 0 5 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82233e7e) at panic+0x15c sys/kern/subr_prf.c:207 amap_lookup(fffffd80579acef0,0) at amap_lookup+0x19b sys/uvm/uvm_amap.c:1027 uvm_map_clean(fffffd806bc09660,c003136000,c003484000,8) at uvm_map_clean+0x43a sys/uvm/uvm_map.c:4670 syscall(ffff80001d7f4bc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00015feb8, count: -6 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82233e7e) at panic+0x15c sys/kern/subr_prf.c:207 amap_lookup(fffffd80579acef0,0) at amap_lookup+0x19b sys/uvm/uvm_amap.c:1027 uvm_map_clean(fffffd806bc09660,c003136000,c003484000,8) at uvm_map_clean+0x43a sys/uvm/uvm_map.c:4670 syscall(ffff80001d7f4bc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc00015feb8, count: -6