panic: pool_do_get: art_table free list modified: page 0xfffffd8067d10000; item addr 0xfffffd8067d10010; offset 0x0=0x0 != 0x7fe238986de7cf58 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *165075 70024 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff822252cd) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff825581b0,a,ffff800021481008) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff825581b0,a) at pool_get+0xb5 sys/kern/subr_pool.c:581 art_table_get(ffff80000007da40,fffffd80565ee8e8,1a) at art_table_get+0xac sys/net/art.c:708 art_insert(ffff80000007da40,fffffd805e372990,ffff80000002d824,20) at art_insert+0x155 sys/net/art.c:387 rtable_insert(0,ffff80000002d820,0,ffff8000009f19a0,1,fffffd8056acebd8) at rtable_insert+0x2b4 sys/net/rtable.c:554 rtrequest(1,ffff800021481328,1,ffff8000214813f0,0) at rtrequest+0x8be sys/net/route.c:941 rt_ifa_add(ffff800000a10a00,240404,ffff800000a10a58,0) at rt_ifa_add+0x25c sys/net/route.c:1130 rt_ifa_addlocal(ffff800000a10a00) at rt_ifa_addlocal+0x149 sys/net/route.c:1237 in_ifinit(ffff800000a46800,ffff800000a10a00,ffff800000a10a58,0) at in_ifinit+0x1cf sys/netinet/in.c:688 in_ioctl_change_ifaddr(8040691a,ffff800021481730,ffff800000a46800,1) at in_ioctl_change_ifaddr+0x68c sys/netinet/in.c:519 in_ioctl(8040691a,ffff800021481730,ffff800000a46800,1) at in_ioctl+0x2fb sys/netinet/in.c:246 ifioctl(fffffd805da86e18,8040691a,ffff800021481730,ffff80001d36dc48) at ifioctl+0xe60 sys/net/if.c:2290 end trace frame: 0xffff800021481830, count: 0 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: art_table free list modified: page 0xfffffd8067d10000; item addr 0xfffffd8067d10010; offset 0x0=0x0 != 0x7fe238986de7cf58 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff822252cd) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff825581b0,a,ffff800021481008) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff825581b0,a) at pool_get+0xb5 sys/kern/subr_pool.c:581 art_table_get(ffff80000007da40,fffffd80565ee8e8,1a) at art_table_get+0xac sys/net/art.c:708 art_insert(ffff80000007da40,fffffd805e372990,ffff80000002d824,20) at art_insert+0x155 sys/net/art.c:387 rtable_insert(0,ffff80000002d820,0,ffff8000009f19a0,1,fffffd8056acebd8) at rtable_insert+0x2b4 sys/net/rtable.c:554 rtrequest(1,ffff800021481328,1,ffff8000214813f0,0) at rtrequest+0x8be sys/net/route.c:941 rt_ifa_add(ffff800000a10a00,240404,ffff800000a10a58,0) at rt_ifa_add+0x25c sys/net/route.c:1130 rt_ifa_addlocal(ffff800000a10a00) at rt_ifa_addlocal+0x149 sys/net/route.c:1237 in_ifinit(ffff800000a46800,ffff800000a10a00,ffff800000a10a58,0) at in_ifinit+0x1cf sys/netinet/in.c:688 in_ioctl_change_ifaddr(8040691a,ffff800021481730,ffff800000a46800,1) at in_ioctl_change_ifaddr+0x68c sys/netinet/in.c:519 in_ioctl(8040691a,ffff800021481730,ffff800000a46800,1) at in_ioctl+0x2fb sys/netinet/in.c:246 ifioctl(fffffd805da86e18,8040691a,ffff800021481730,ffff80001d36dc48) at ifioctl+0xe60 sys/net/if.c:2290 sys_ioctl(ffff80001d36dc48,ffff800021481848,ffff800021481890) at sys_ioctl+0x4a1 syscall(ffff800021481910) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8d62d1a59b0, count: -17 ddb> show registers rdi 0xffffffff81008d67 db_enter+0x17 rsi 0x691b __ALIGN_SIZE+0x591b rbp 0xffff800021480e70 rbx 0xffff800021480f20 rdx 0x691c __ALIGN_SIZE+0x591c rcx 0xffff80001e42d000 rax 0xffff80001e42d000 r8 0xffff800021480e30 r9 0x1 r10 0xffff8000009f2c80 r11 0xa3ddce0f4a09972 r12 0x3000000008 r13 0xffff800021480e80 r14 0x100 r15 0x1 rip 0xffffffff81008d68 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021480e60 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=165075 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=52, nice=20 forw=0xffffffffffffffff, list=0xffff80001d36d288,0xffffffff82550f40 process=0xffff8000ffffbc10 user=0xffff80002147c000, vmspace=0xfffffd8069d87ab0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 70024 11712 60214 0 2 0 syz-executor.1 *70024 165075 60214 0 7 0x4000000 syz-executor.1 60214 62550 467 0 3 0x82 nanosleep syz-executor.1 90934 208174 467 0 3 0x82 nanosleep syz-executor.0 91559 210023 0 0 3 0x14200 bored sosplice 467 281007 70271 0 3 0x82 thrsleep syz-fuzzer 467 437974 70271 0 3 0x4000082 thrsleep syz-fuzzer 467 294140 70271 0 3 0x4000082 thrsleep syz-fuzzer 467 477918 70271 0 3 0x4000082 thrsleep syz-fuzzer 467 122143 70271 0 3 0x4000082 thrsleep syz-fuzzer 467 66187 70271 0 3 0x4000082 thrsleep syz-fuzzer 467 310891 70271 0 3 0x4000082 thrsleep syz-fuzzer 467 70777 70271 0 3 0x4000082 kqread syz-fuzzer 70271 493337 56497 0 3 0x10008a pause ksh 56497 517589 29526 0 3 0x92 select sshd 12056 296221 1 0 3 0x100083 ttyin getty 29526 480908 1 0 3 0x80 select sshd 99846 354443 89167 73 3 0x100090 kqread syslogd 89167 231188 1 0 3 0x100082 netio syslogd 43071 317812 1 77 2 0x100090 dhclient 40955 57285 1 0 3 0x80 poll dhclient 95891 221931 0 0 2 0x14200 zerothread 39389 365947 0 0 3 0x14200 aiodoned aiodoned 89259 112990 0 0 3 0x14200 syncer update 53402 74610 0 0 3 0x14200 cleaner cleaner 1875 166015 0 0 3 0x14200 reaper reaper 43992 115241 0 0 3 0x14200 pgdaemon pagedaemon 54445 393306 0 0 3 0x14200 bored crynlk 7729 377482 0 0 3 0x14200 bored crypto 39597 419395 0 0 3 0x40014200 acpi0 acpi0 35302 18140 0 0 3 0x14200 bored softnet 28465 455159 0 0 2 0x14200 systqmp 14498 324282 0 0 3 0x14200 bored systq 26453 19437 0 0 3 0x40014200 bored softclock 2125 23660 0 0 3 0x40014200 idle0 70318 270749 0 0 3 0x14200 bored smr 1 103301 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 9530 6371K 6920K 78643K 12174 0 pcb 13 8K 8K 78643K 220 0 rtable 97 3K 4K 78643K 562 0 ifaddr 90 17K 17K 78643K 232 0 counters 21 16K 16K 78643K 46 0 ioctlops 0 0K 2K 78643K 49 0 iov 0 0K 24K 78643K 199 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 1799 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 19 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 437 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 5 13K 25K 78643K 842 0 sigio 0 0K 0K 78643K 10 0 proc 50 38K 54K 78643K 521 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 119 0 in_multi 65 3K 3K 78643K 215 0 ether_multi 1 0K 0K 78643K 33 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 326 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 121 70K 72K 78643K 3060 0 UVM aobj 50 2K 2K 78643K 58 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 162 0 NDP 15 0K 0K 78643K 54 0 temp 142 3018K 3098K 78643K 37669 0 kqueue 3 4K 14K 78643K 79 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 12 0 7 1 0 1 1 0 8 0 rtpcb 80 87 0 85 1 0 1 1 0 8 0 rtentry 112 112 0 74 2 0 2 2 0 8 0 unpcb 120 657 0 648 1 0 1 1 0 8 0 syncache 264 6 0 6 3 3 0 1 0 8 0 tcpqe 32 44 0 44 2 2 0 1 0 8 0 tcpcb 544 432 0 427 3 1 2 2 0 8 1 ipq 40 9 0 9 2 2 0 1 0 8 0 ipqe 40 151 0 151 2 2 0 1 0 8 0 inpcb 280 1200 0 1192 6 3 3 3 0 8 2 nd6 48 18 0 17 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 5 0 5 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 537 0 360 18 5 13 16 0 8 0 art_table 32 539 0 360 3 0 3 3 0 8 0 art_table: pool(0xffffffff825581b0:art_table): free list modified: page 0xfffffd8067d10000; item ordinal 0; addr 0xfffffd8067d10010 (p 0xfffffd8067d10000); offset 0x0=0x0 art_table: pool(0xffffffff825581b0:art_table): page inconsistency: page 0xfffffd8067d10000; item ordinal 1; addr 0xffffa09609b747ee art_node 16 111 0 73 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 14 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 435 0 425 1 0 1 1 0 8 0 shmpl 112 56 0 8 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2870 0 1470 46 0 46 46 0 8 0 ffsino 240 2870 0 1470 83 0 83 83 0 8 0 nchpl 144 4460 0 2858 60 0 60 60 0 8 0 uvmvnodes 72 3308 0 0 61 0 61 61 0 8 0 vnodes 208 3308 0 0 175 0 175 175 0 8 0 namei 1024 13931 0 13931 2 1 1 1 0 8 1 vcpupl 1984 7 0 2 1 0 1 1 0 8 0 vmpool 528 9 0 4 1 0 1 1 0 8 0 scxspl 192 14980 0 14980 1 0 1 1 0 8 1 plimitpl 152 98 0 91 1 0 1 1 0 8 0 sigapl 432 1007 0 994 2 0 2 2 0 8 0 futexpl 56 29884 0 29884 2 1 1 1 0 8 1 knotepl 112 181 0 162 1 0 1 1 0 8 0 kqueuepl 104 931 0 929 1 0 1 1 0 8 0 pipelkpl 16 638 0 628 1 0 1 1 0 8 0 pipepl 120 1276 0 1257 5 4 1 3 0 8 0 fdescpl 432 1008 0 994 2 0 2 2 0 8 0 filepl 120 9805 0 9709 16 11 5 8 0 8 2 lockfpl 104 308 0 306 1 0 1 1 0 8 0 lockfspl 48 110 0 108 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 25 0 15 1 0 1 1 0 8 0 ucredpl 96 966 0 958 1 0 1 1 0 8 0 zombiepl 144 994 0 993 1 0 1 1 0 8 0 processpl 896 1023 0 993 4 0 4 4 0 8 0 procpl 624 2035 0 1997 4 0 4 4 0 8 0 sosppl 128 11 0 11 2 2 0 1 0 8 0 sockpl 400 1960 0 1941 9 4 5 6 0 8 2 mcl64k 65536 91 0 91 2 1 1 1 0 8 1 mcl16k 16384 18 0 18 2 2 0 1 0 8 0 mcl12k 12288 27 0 27 2 1 1 1 0 8 1 mcl9k 9216 19 0 19 2 2 0 1 0 8 0 mcl8k 8192 38 0 38 2 1 1 1 0 8 1 mcl4k 4096 84 0 84 3 2 1 1 0 8 1 mcl2k2 2112 9 0 9 3 3 0 1 0 8 0 mcl2k 2048 66758 0 66714 18 12 6 14 0 8 0 mtagpl 80 85 0 23 3 1 2 2 0 8 0 mbufpl 256 113441 0 113177 40 20 20 31 0 8 0 bufpl 280 7418 0 2010 387 0 387 387 0 8 0 anonpl 16 121584 0 104998 105 21 84 84 0 107 15 amapchunkpl 152 5822 0 5693 32 24 8 20 0 158 0 amappl16 192 6103 0 5182 81 22 59 59 0 8 12 amappl15 184 54 0 50 1 0 1 1 0 8 0 amappl14 176 181 0 178 1 0 1 1 0 8 0 amappl13 168 58 0 58 1 1 0 1 0 8 0 amappl12 160 9 0 8 1 0 1 1 0 8 0 amappl11 152 55 0 44 1 0 1 1 0 8 0 amappl10 144 17 0 15 1 0 1 1 0 8 0 amappl9 136 838 0 832 1 0 1 1 0 8 0 amappl8 128 395 0 368 1 0 1 1 0 8 0 amappl7 120 102 0 91 1 0 1 1 0 8 0 amappl6 112 65 0 57 1 0 1 1 0 8 0 amappl5 104 170 0 159 1 0 1 1 0 8 0 amappl4 96 1251 0 1222 1 0 1 1 0 8 0 amappl3 88 292 0 284 1 0 1 1 0 8 0 amappl2 80 7252 0 7183 3 1 2 3 0 8 0 amappl1 72 27525 0 27099 25 15 10 20 0 8 0 amappl 80 2315 0 2271 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 57 0 8 1 0 1 1 0 8 0 uaddrrnd 24 1017 0 998 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1017 0 998 1 0 1 1 0 8 0 vmmpekpl 168 11224 0 11194 2 0 2 2 0 8 0 vmmpepl 168 127294 0 125270 157 57 100 147 0 357 6 vmsppl 272 1016 0 998 3 1 2 2 0 8 0 pdppl 4096 2040 0 2001 7 1 6 6 0 8 0 pvpl 32 342550 0 322893 230 32 198 200 0 265 37 pmappl 200 1016 0 998 4 2 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 203 0 53 5 0 5 5 0 8 0