panic(ffffffff82250235) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8259e668,2,ffff80001d81e098) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff8259e668,2) at pool_get+0xb5 sys/kern/subr_pool.c:581 m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250 rt_ifa_del(ffff800000a0c500,800100,ffff800000a0c540,0) at rt_ifa_del+0xa1 sys/net/route.c:1163 in6_unlink_ifa(ffff800000a0c500,ffff8000009f7800) at in6_unlink_ifa+0x571 sys/netinet6/in6.c:943 in6_update_ifa(ffff8000009f7800,ffff80001d81e630,0) at in6_update_ifa+0x13f7 sys/netinet6/in6.c:875 in6_ioctl_change_ifaddr(8080691a,ffff80001d81e630,ffff8000009f7800) at in6_ioctl_change_ifaddr+0x40c sys/netinet6/in6.c:352 ifioctl(fffffd805dad3e18,8080691a,ffff80001d81e630,ffff80001d73a5f8) at ifioctl+0xe60 sys/net/if.c:2289 sys_ioctl(ffff80001d73a5f8,ffff80001d81e748,ffff80001d81e790) at sys_ioctl+0x4a1 syscall(ffff80001d81e810) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2baf438d770, count: 2 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 pool_do_get: mbufpl free list modified: page 0xfffffd805d39e000; item addr 0xfffffd805d39e900; offset 0x0=0x0 != 0x5bfc7c78bf733507 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82250235) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8259e668,2,ffff80001d81e098) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff8259e668,2) at pool_get+0xb5 sys/kern/subr_pool.c:581 m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250 rt_ifa_del(ffff800000a0c500,800100,ffff800000a0c540,0) at rt_ifa_del+0xa1 sys/net/route.c:1163 in6_unlink_ifa(ffff800000a0c500,ffff8000009f7800) at in6_unlink_ifa+0x571 sys/netinet6/in6.c:943 in6_update_ifa(ffff8000009f7800,ffff80001d81e630,0) at in6_update_ifa+0x13f7 sys/netinet6/in6.c:875 in6_ioctl_change_ifaddr(8080691a,ffff80001d81e630,ffff8000009f7800) at in6_ioctl_change_ifaddr+0x40c sys/netinet6/in6.c:352 ifioctl(fffffd805dad3e18,8080691a,ffff80001d81e630,ffff80001d73a5f8) at ifioctl+0xe60 sys/net/if.c:2289 sys_ioctl(ffff80001d73a5f8,ffff80001d81e748,ffff80001d81e790) at sys_ioctl+0x4a1 syscall(ffff80001d81e810) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2baf438d770, count: -13 ddb> show registers rdi 0 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff80001d81df00 rbx 0xffff80001d81dfb0 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff80001fa27000 rax 0xffff8000009fa380 r8 0xffff80001d81dec0 r9 0x1 r10 0xffff8000009fa380 r11 0x95c9b18c81d28e91 r12 0x3000000008 r13 0xffff80001d81df10 r14 0x100 r15 0x1 rip 0xffffffff812ce6e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d81def0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=153418 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=65, nice=20 forw=0xffffffffffffffff, list=0xffff80001d7394e8,0xffffffff82595198 process=0xffff8000ffffae70 user=0xffff80001d819000, vmspace=0xfffffd806bc09660 estcpu=15, cpticks=22, pctcpu=0.0 user=0, sys=18, intr=4 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 16568 472488 95545 0 2 0 syz-executor.1 *16568 153418 95545 0 7 0x4000000 syz-executor.1 95545 23568 63171 0 3 0x82 nanosleep syz-executor.1 36741 457875 63171 0 3 0x2 biowait syz-executor.0 63171 135059 57846 0 3 0x82 thrsleep syz-fuzzer 63171 275119 57846 0 3 0x4000082 nanosleep syz-fuzzer 63171 485970 57846 0 3 0x4000082 thrsleep syz-fuzzer 63171 149518 57846 0 3 0x4000082 thrsleep syz-fuzzer 63171 507654 57846 0 3 0x4000082 kqread syz-fuzzer 63171 426544 57846 0 3 0x4000082 thrsleep syz-fuzzer 63171 391483 57846 0 3 0x4000082 thrsleep syz-fuzzer 57846 136296 76178 0 3 0x10008a pause ksh 76178 36361 99530 0 3 0x92 select sshd 80467 44771 1 0 3 0x100083 ttyin getty 99530 334276 1 0 3 0x80 select sshd 83168 18344 6079 73 3 0x100090 kqread syslogd 6079 482387 1 0 3 0x100082 netio syslogd 86677 126675 1 77 3 0x100090 poll dhclient 72312 373663 1 0 3 0x80 poll dhclient 92352 207759 0 0 3 0x14200 bored smr 13686 498217 0 0 2 0x14200 zerothread 87905 426596 0 0 3 0x14200 aiodoned aiodoned 9706 19705 0 0 3 0x14200 syncer update 9213 19448 0 0 3 0x14200 cleaner cleaner 51501 301414 0 0 3 0x14200 reaper reaper 38173 15566 0 0 3 0x14200 pgdaemon pagedaemon 13936 141675 0 0 3 0x14200 bored crynlk 70394 303118 0 0 3 0x14200 bored crypto 46260 104273 0 0 3 0x40014200 acpi0 acpi0 8725 347564 0 0 3 0x14200 bored softnet 82696 277816 0 0 3 0x14200 bored systqmp 76613 125445 0 0 3 0x14200 bored systq 96348 177634 0 0 3 0x40014200 bored softclock 78169 174538 0 0 3 0x40014200 idle0 1 19812 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 9472 6585K 6585K 78643K 10594 0 pcb 13 8K 8K 78643K 27 0 rtable 85 2K 3K 78643K 247 0 ifaddr 45 10K 10K 78643K 55 0 counters 21 16K 16K 78643K 22 0 ioctlops 0 0K 2K 78643K 19 0 iov 0 0K 12K 78643K 32 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1238 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 0K 0K 78643K 2 0 sem 8 0K 0K 78643K 8 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 5 13K 25K 78643K 68 0 proc 48 38K 63K 78643K 361 0 subproc 32 2K 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 3 0 in_multi 33 2K 2K 78643K 44 0 ether_multi 1 0K 0K 78643K 3 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 185 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 115 22K 42K 78643K 1020 0 UVM aobj 2 2K 2K 78643K 2 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 16 0 NDP 6 0K 0K 78643K 11 0 temp 68 3032K 3096K 78643K 1973 0 kqueue 3 4K 4K 78643K 3 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 10 0 4 1 0 1 1 0 8 0 rtpcb 80 23 0 21 1 0 1 1 0 8 0 rtentry 112 59 0 25 2 0 2 2 0 8 0 unpcb 120 25 0 17 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 64 0 64 1 0 1 1 0 8 1 tcpcb 544 36 0 32 1 0 1 1 0 8 0 inpcb 280 104 0 95 2 0 2 2 0 8 1 nd6 48 6 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 267 0 84 13 0 13 13 0 8 1 art_table 32 268 0 84 2 0 2 2 0 8 0 art_node 16 58 0 30 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semapl 112 6 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1470 0 72 88 0 88 88 0 8 0 ffsino 240 1470 0 72 83 0 83 83 0 8 0 nchpl 144 1745 0 146 60 0 60 60 0 8 0 uvmvnodes 72 1524 0 0 28 0 28 28 0 8 0 vnodes 208 1524 0 0 81 0 81 81 0 8 0 namei 1024 4272 0 4272 1 0 1 1 0 8 1 vmpool 528 1 0 1 1 0 1 1 0 8 1 scxspl 192 4337 0 4336 1 0 1 1 0 8 0 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 424 254 0 226 4 0 4 4 0 8 0 futexpl 56 818 0 818 1 0 1 1 0 8 1 knotepl 112 61 0 42 1 0 1 1 0 8 0 kqueuepl 144 2 0 0 1 0 1 1 0 8 0 pipelkpl 16 76 0 66 1 0 1 1 0 8 0 pipepl 120 152 0 133 1 0 1 1 0 8 0 fdescpl 432 240 0 226 2 0 2 2 0 8 0 filepl 120 1223 0 1124 4 0 4 4 0 8 1 lockfpl 104 19 0 18 1 0 1 1 0 8 0 lockfspl 48 7 0 6 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 66 0 59 1 0 1 1 0 8 0 zombiepl 144 226 0 226 1 0 1 1 0 8 1 processpl 920 254 0 226 4 0 4 4 0 8 0 procpl 624 303 0 268 4 0 4 4 0 8 1 sockpl 400 152 0 133 4 0 4 4 0 8 2 mcl4k 4096 10 0 10 2 1 1 1 0 8 1 mcl2k 2048 62296 0 62245 17 2 15 15 0 8 7 mtagpl 80 5 0 2 2 1 1 1 0 8 0 mbufpl 256 99305 0 99212 12 1 11 11 0 8 1 mbufpl: pool(0xffffffff8259e668:mbufpl): free list modified: page 0xfffffd805d39e000; item ordinal 0; addr 0xfffffd805d39e900 (p 0xfffffd805dd94000); offset 0x0=0x0 mbufpl: pool(0xffffffff8259e668:mbufpl): page inconsistency: page 0xfffffd805d39e000; item ordinal 1; addr 0x50598211341cad07 bufpl 280 3318 0 126 228 0 228 228 0 8 0 anonpl 16 37804 0 24832 54 1 53 53 0 107 0 amapchunkpl 152 1672 0 1538 19 0 19 19 0 158 13 amappl16 192 959 0 271 35 0 35 35 0 8 0 amappl15 184 17 0 15 1 0 1 1 0 8 0 amappl14 176 23 0 18 1 0 1 1 0 8 0 amappl13 168 23 0 22 1 0 1 1 0 8 0 amappl12 160 12 0 9 2 1 1 1 0 8 0 amappl11 152 44 0 34 1 0 1 1 0 8 0 amappl10 144 15 0 10 1 0 1 1 0 8 0 amappl9 136 368 0 366 1 0 1 1 0 8 0 amappl8 128 318 0 282 2 0 2 2 0 8 0 amappl7 120 115 0 101 1 0 1 1 0 8 0 amappl6 112 27 0 19 1 0 1 1 0 8 0 amappl5 104 186 0 176 1 0 1 1 0 8 0 amappl4 96 419 0 395 1 0 1 1 0 8 0 amappl3 88 101 0 94 1 0 1 1 0 8 0 amappl2 80 1111 0 1044 2 0 2 2 0 8 0 amappl1 72 14017 0 13613 24 8 16 17 0 8 7 amappl 80 555 0 513 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 241 0 227 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 241 0 227 1 0 1 1 0 8 0 vmmpekpl 168 5836 0 5812 2 0 2 2 0 8 0 vmmpepl 168 35453 0 33701 104 7 97 97 0 357 20 vmsppl 272 240 0 227 2 0 2 2 0 8 1 pdppl 4096 488 0 454 6 0 6 6 0 8 1 pvpl 32 130439 0 114524 130 0 130 130 0 265 1 pmappl 200 240 0 227 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 239 0 6 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(ffffffff82250235) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8259e668,2,ffff80001d81e098) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff8259e668,2) at pool_get+0xb5 sys/kern/subr_pool.c:581 m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250 rt_ifa_del(ffff800000a0c500,800100,ffff800000a0c540,0) at rt_ifa_del+0xa1 sys/net/route.c:1163 in6_unlink_ifa(ffff800000a0c500,ffff8000009f7800) at in6_unlink_ifa+0x571 sys/netinet6/in6.c:943 in6_update_ifa(ffff8000009f7800,ffff80001d81e630,0) at in6_update_ifa+0x13f7 sys/netinet6/in6.c:875 in6_ioctl_change_ifaddr(8080691a,ffff80001d81e630,ffff8000009f7800) at in6_ioctl_change_ifaddr+0x40c sys/netinet6/in6.c:352 ifioctl(fffffd805dad3e18,8080691a,ffff80001d81e630,ffff80001d73a5f8) at ifioctl+0xe60 sys/net/if.c:2289 sys_ioctl(ffff80001d73a5f8,ffff80001d81e748,ffff80001d81e790) at sys_ioctl+0x4a1 syscall(ffff80001d81e810) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2baf438d770, count: -13 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82250235) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8259e668,2,ffff80001d81e098) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff8259e668,2) at pool_get+0xb5 sys/kern/subr_pool.c:581 m_get(2,3) at m_get+0x4c sys/kern/uipc_mbuf.c:250 rt_ifa_del(ffff800000a0c500,800100,ffff800000a0c540,0) at rt_ifa_del+0xa1 sys/net/route.c:1163 in6_unlink_ifa(ffff800000a0c500,ffff8000009f7800) at in6_unlink_ifa+0x571 sys/netinet6/in6.c:943 in6_update_ifa(ffff8000009f7800,ffff80001d81e630,0) at in6_update_ifa+0x13f7 sys/netinet6/in6.c:875 in6_ioctl_change_ifaddr(8080691a,ffff80001d81e630,ffff8000009f7800) at in6_ioctl_change_ifaddr+0x40c sys/netinet6/in6.c:352 ifioctl(fffffd805dad3e18,8080691a,ffff80001d81e630,ffff80001d73a5f8) at ifioctl+0xe60 sys/net/if.c:2289 sys_ioctl(ffff80001d73a5f8,ffff80001d81e748,ffff80001d81e790) at sys_ioctl+0x4a1 syscall(ffff80001d81e810) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2baf438d770, count: -13