panic: amap_wipeout: corrupt amap Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 304853 67231 0 0 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198 amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470 uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7da1b3572b40, count: 6 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: amap_wipeout: corrupt amap ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198 amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470 uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7da1b3572b40, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002efc1ff0 rbx 0xffff8000299dee07 rdx 0 rcx 0xffff80003c44e7f8 rax 0xffff8000299ddff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x40a38bf5281e09b5 r11 0xf377509939cc729a r12 0xffff8000299dec08 r13 0 r14 0 r15 0x1 rip 0xffffffff8174fac5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002efc1fe0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=42612 pid=97899 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c44e7f8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c44e2c8,0xffff80003c414800 process=0xffff8000fffe5370 user=0xffff80002efbd000, vmspace=0xfffffd800f37f7d0 estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 67231 304853 11980 0 7 0 syz-executor 67231 488495 11980 0 2 0x4000000 syz-executor 7760 94813 13971 0 2 0 syz-executor 47582 197044 24728 0 2 0 syz-executor 47582 267556 24728 0 3 0x4000080 fsleep syz-executor 75899 93137 89458 60928 2 0x10 syz-executor 75899 409348 89458 60928 3 0x4000090 fsleep syz-executor 70214 354978 45698 0 2 0 syz-executor 70214 57370 45698 0 3 0x4000080 fsleep syz-executor 70214 343475 45698 0 2 0x4000000 syz-executor 45698 398083 69613 0 3 0x82 nanoslp syz-executor 35195 159868 1 0 3 0x100083 ttyin getty 40861 139446 0 0 3 0x14280 nfsidl nfsio 90638 380281 0 0 3 0x14280 nfsidl nfsio 9207 504802 0 0 3 0x14280 nfsidl nfsio 1297 162324 0 0 3 0x14280 nfsidl nfsio 81611 399016 0 0 3 0x14280 nfsidl nfsio 47191 263463 0 0 3 0x14280 nfsidl nfsio 2483 246036 0 0 3 0x14280 nfsidl nfsio 95281 483523 0 0 3 0x14280 nfsidl nfsio 19700 289101 0 0 3 0x14280 nfsidl nfsio 15383 113100 0 0 3 0x14280 nfsidl nfsio 18897 186100 0 0 3 0x14280 nfsidl nfsio 35411 496030 0 0 3 0x14280 nfsidl nfsio 69137 143707 0 0 3 0x14280 nfsidl nfsio 89586 261122 0 0 3 0x14280 nfsidl nfsio 47520 170494 0 0 3 0x14280 nfsidl nfsio 18805 222540 0 0 3 0x14280 nfsidl nfsio 77609 65183 0 0 3 0x14280 nfsidl nfsio 39171 10087 0 0 3 0x14280 nfsidl nfsio 77304 158387 0 0 3 0x14280 nfsidl nfsio 33046 511462 0 0 3 0x14280 nfsidl nfsio 13971 52763 69613 0 3 0x82 nanoslp syz-executor 4320 459665 69613 0 3 0x82 nanoslp syz-executor 24728 433050 69613 0 3 0x82 nanoslp syz-executor 11980 516357 69613 0 3 0x82 nanoslp syz-executor 92619 465116 69613 0 3 0x82 wait syz-executor 36581 390416 69613 0 3 0x82 wait syz-executor 89458 370030 69613 0 3 0x82 nanoslp syz-executor 69613 121953 76271 0 2 0x2 syz-executor 76271 417119 81779 0 3 0x10008a sigsusp ksh 81779 144026 28925 0 3 0x98 kqread sshd-session 28925 181798 11278 0 3 0x92 kqread sshd-session 11278 463211 1 0 3 0x88 kqread sshd 72850 413435 431 74 3 0x1100092 bpf pflogd 431 116086 1 0 3 0x80 sbwait pflogd 62261 338050 18701 73 3 0x1100090 kqread syslogd 18701 227836 1 0 3 0x100082 sbwait syslogd 95681 277389 1 0 3 0x100080 kqread resolvd 42436 470317 6362 77 3 0x100092 kqread dhcpleased 92225 302273 6362 77 3 0x100092 kqread dhcpleased 6362 297181 1 0 3 0x80 kqread dhcpleased 79974 197312 0 0 3 0x14200 bored smr 93904 484847 0 0 2 0x14200 zerothread 95687 194142 0 0 3 0x14200 aiodoned aiodoned 21816 61891 0 0 3 0x14200 syncer update 83103 498913 0 0 3 0x14200 cleaner cleaner 19361 94310 0 0 3 0x14200 reaper reaper 93888 395633 0 0 3 0x14200 pgdaemon pagedaemon 23010 402911 0 0 3 0x14200 bored viomb 22080 496486 0 0 3 0x40014200 acpi0 acpi0 10389 170019 0 0 3 0x40014200 idle1 4507 193709 0 0 3 0x14200 bored softnet1 90613 265511 0 0 3 0x14200 bored softnet0 13891 170275 0 0 3 0x14200 bored systqmp 59745 441880 0 0 3 0x14200 bored systq 81186 505259 0 0 3 0x14200 tmoslp softclockmp 28072 29305 0 0 3 0x40014200 tmoslp softclock 37446 371282 0 0 3 0x40014200 idle0 1 510856 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 67231 (syz-executor) thread 0xffff80002a261240 (488495) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 11032K 11549K 166960K 13310 0 pcb 17 13K 14K 166960K 180 0 rtable 210 13K 13K 166960K 536 0 pf 34 17K 21K 166960K 109 0 ifaddr 38 6K 7K 166960K 89 0 ifgroup 55 2K 2K 166960K 125 0 sysctl 4 1K 9K 166960K 54 0 counters 70 37K 37K 166960K 154 0 ioctlops 0 0K 4K 166960K 1717 0 iov 0 0K 24K 166960K 52 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1524 96K 96K 166960K 2344 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 6K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 106K 166960K 1003 0 sigio 0 0K 0K 166960K 19 0 proc 73 115K 163K 166960K 678 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 96 0 in_multi 77 5K 7K 166960K 157 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 605 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 239 167K 191K 166960K 10585 0 UVM aobj 15 6K 6K 166960K 16 0 pinsyscall 42 84K 106K 166960K 2181 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 44 0 NDP 12 0K 2K 166960K 60 0 temp 60 8675K 8755K 166960K 39153 0 kqueue 13 20K 30K 166960K 167 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 82 0 79 1 0 1 1 0 8 0 rtentry 176 158 0 76 6 1 5 6 0 8 0 unpcb 144 525 0 506 4 2 2 3 0 8 1 syncache 336 6 0 6 2 2 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 296 0 290 7 5 2 4 0 8 1 arp 136 26 0 12 1 0 1 1 0 8 0 inpcb 328 906 0 897 15 8 7 7 0 8 6 nd6 152 32 0 12 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 35 0 35 1 0 1 1 0 8 1 pppxif 1504 4 0 4 2 1 1 1 0 8 1 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 6 0 1 1 0 1 1 0 8 0 pffrent 40 19 0 13 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 59 0 20 1 0 1 1 0 8 0 pfstkey 128 59 0 20 2 0 2 2 0 8 0 pfstate 448 59 0 20 6 0 6 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 649 0 281 30 5 25 29 0 8 1 art_table 40 651 0 281 5 0 5 5 0 8 0 art_node 32 156 0 85 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 5 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 19 0 9 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 26 0 9 3 0 3 3 0 8 0 dino2pl 256 3068 0 1559 95 0 95 95 0 8 0 ffsino 296 3068 0 1559 117 0 117 117 0 8 0 nchpl 144 4388 0 2685 64 0 64 64 0 8 0 rtmask 32 7 0 7 3 2 1 1 0 8 1 vnodes 216 3872 0 0 216 0 216 216 0 8 0 namei 1024 14735 0 14734 3 2 1 2 0 8 0 percpumem 16 92 0 42 1 0 1 1 0 8 0 vcpupl 3968 3 0 1 1 0 1 1 0 8 0 vmpool 848 3 0 1 1 0 1 1 0 8 0 kstatmem 264 80 0 52 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 21322 0 21322 10 6 4 8 1 8 4 plimitpl 152 293 0 275 1 0 1 1 0 8 0 sigapl 424 1322 0 1254 9 1 8 8 0 8 0 knotepl 120 554 0 0 17 0 17 17 0 8 0 kqueuepl 224 313 0 304 4 2 2 3 0 8 1 pipepl 344 180 0 153 3 0 3 3 0 8 0 fdescpl 528 1286 0 1255 3 0 3 3 0 8 0 filepl 160 6917 0 6696 18 5 13 15 0 8 2 lockfpl 104 692 0 690 3 1 2 2 0 8 1 lockfspl 48 271 0 269 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 108 0 91 1 0 1 1 0 8 0 ucredpl 104 794 0 780 1 0 1 1 0 8 0 zombiepl 144 1257 0 1254 2 1 1 1 0 8 0 processpl 1232 1322 0 1254 7 1 6 6 0 8 0 procpl 664 2642 0 2569 9 1 8 8 0 8 0 sosppl 176 8 0 8 2 1 1 1 0 8 1 sockpl 752 1539 0 1508 19 9 10 11 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 132 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 31 0 0 4 0 4 4 0 8 0 mtagpl 96 38 0 0 1 0 1 1 0 8 0 mbufpl 256 320 0 0 20 0 20 20 0 8 0 bufpl 280 9951 0 3815 439 0 439 439 0 8 0 anonpl 32 9902 0 0 80 0 80 80 0 246 0 anonpl: pool(0xffffffff83a06d98:anonpl): page inconsistency: page 0x0; at page head addr 0xfffffd806cacef90 (p 0xfffffd806cace000) amapchunkpl 152 35733 0 35264 46 13 33 33 0 158 9 amappl16 200 4024 0 3986 35 23 12 17 0 8 4 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 8 0 8 1 1 0 1 0 8 0 amappl13 176 448 0 447 1 0 1 1 0 8 0 amappl12 168 1660 0 1619 3 0 3 3 0 8 0 amappl11 160 35 0 35 1 1 0 1 0 8 0 amappl10 152 55 0 40 1 0 1 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 83 0 82 1 0 1 1 0 8 0 amappl6 120 316 0 302 1 0 1 1 0 8 0 amappl5 112 78 0 67 1 0 1 1 0 8 0 amappl4 104 430 0 399 1 0 1 1 0 8 0 amappl3 96 6957 0 6857 6 2 4 4 0 8 1 amappl2 88 556 0 497 2 0 2 2 0 8 0 amappl1 80 12937 0 12344 16 2 14 15 0 8 0 amappl 88 9674 0 9514 5 0 5 5 0 92 0 uvmvnodes 80 131 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 128 254 0 254 2 2 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 15 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1287 0 1256 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1287 0 1256 1 0 1 1 0 8 0 vmmpekpl 168 11412 0 11371 3 0 3 3 0 8 0 vmmpepl 168 86264 0 84332 112 16 96 100 0 357 1 vmsppl 488 1286 0 1255 7 2 5 5 0 8 0 rwobjpl 80 24559 0 23492 30 2 28 28 0 8 1 pdppl 4096 2587 0 2514 109 35 74 85 0 8 1 pvpl 32 19030 0 0 154 0 154 154 0 265 0 pmappl 256 1289 0 1256 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 307 0 51 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8389eff0) 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 end of kernel end trace frame: 0x77ee170f6d00, count: 12 ddb{0}> trace x86_ipi_db(ffffffff8389eff0) 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 end of kernel end trace frame: 0x77ee170f6d00, count: -3 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(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198 amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470 uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7da1b3572b40, count: 6 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8344d893) at panic+0x1e5 sys/kern/subr_prf.c:198 amap_wipeout(fffffd806c737ee0) at amap_wipeout+0x366 sys/uvm/uvm_amap.c:470 uvm_unmap_detach(ffff80002efc2150,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd800f37f7d0) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 exit1(ffff80003c44e7f8,0,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003c44e7f8,ffff80002efc2320,ffff80002efc2270) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002efc2320) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002efc2320) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7da1b3572b40, count: -9