panic: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/main/kernel/sys/net/rtable.c", line 131 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 86958 84089 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83431600) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ddfbd,ffffffff833a8ebc,83,ffffffff8342758f) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(98,21) at rtmap_grow+0x1f3 sys/net/rtable.c:131 rtable_add(97) at rtable_add+0x279 sys/net/rtable.c:-1 if_createrdomain(97,ffff8000013f0800) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff8000014b98f0,8020699f,ffff80003c9ad1d0,ffff80002d4f74a8) at ifioctl+0x19be sys/net/if.c:2315 sys_ioctl(ffff80002d4f74a8,ffff80003c9ad3b0,ffff80003c9ad300) at sys_ioctl+0x5bf sys/kern/sys_generic.c:-1 syscall(ffff80003c9ad3b0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9ad3b0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe16c9a8b2c0, count: 5 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 *cpu0: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/main/kernel/sys/net/rtable.c", line 131 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83431600) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ddfbd,ffffffff833a8ebc,83,ffffffff8342758f) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(98,21) at rtmap_grow+0x1f3 sys/net/rtable.c:131 rtable_add(97) at rtable_add+0x279 sys/net/rtable.c:-1 if_createrdomain(97,ffff8000013f0800) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff8000014b98f0,8020699f,ffff80003c9ad1d0,ffff80002d4f74a8) at ifioctl+0x19be sys/net/if.c:2315 sys_ioctl(ffff80002d4f74a8,ffff80003c9ad3b0,ffff80003c9ad300) at sys_ioctl+0x5bf sys/kern/sys_generic.c:-1 syscall(ffff80003c9ad3b0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9ad3b0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe16c9a8b2c0, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c9acf00 rbx 0x21 rdx 0 rcx 0 rax 0xffff80002d4f74a8 r8 0 r9 0x8080808080808080 r10 0xeac635b44146cfe2 r11 0x97452d42b6efd6ec r12 0 r13 0x1 r14 0 r15 0x1 rip 0xffffffff82a9cf05 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c9acef0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=86958 pid=84089 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=53, usrpri=53, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002d4f6cf8,0xffff80002d4f67e8 process=0xffff800036517678 user=0xffff80003c9a8000, vmspace=0xfffffd806c2912e0 estcpu=3, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 46690 483567 46030 0 2 0 syz-executor 46690 305832 46030 0 2 0x4000000 syz-executor 76227 299119 12595 0 2 0 syz-executor 76227 491897 12595 0 3 0x4000080 fsleep syz-executor 48237 157128 40661 0 2 0 syz-executor 48237 50448 40661 0 3 0x4000080 fsleep syz-executor 45301 40930 1582 0 2 0 syz-executor 45301 431867 1582 0 3 0x4000080 fsleep syz-executor 45301 284840 1582 0 3 0x4000080 fsleep syz-executor 84089 195244 92701 0 2 0 syz-executor 84089 103837 92701 0 3 0x4000080 fsleep syz-executor *84089 86958 92701 0 7 0x4000000 syz-executor 84089 57868 92701 0 3 0x4000080 fsleep syz-executor 86173 144376 18668 0 3 0x3000 suspend syz-executor 86173 301517 18668 0 2 0x4081000 syz-executor 89667 166536 63433 -1 2 0x10 syz-executor 89667 136108 63433 -1 3 0x4000090 fsleep syz-executor 89667 427760 63433 -1 3 0x4000090 fsleep syz-executor 54574 199643 297 0 2 0 syz-executor 54574 336729 297 0 2 0x4000c80 syz-executor 54574 418922 297 0 2 0x4000000 syz-executor 63433 378424 4402 0 3 0x82 nanoslp syz-executor 1582 83103 4402 0 2 0xc82 syz-executor 12595 514771 4402 0 2 0xc82 syz-executor 92701 166674 4402 0 2 0xc82 syz-executor 18668 213654 4402 0 3 0x82 nanoslp syz-executor 46030 63547 4402 0 2 0xc82 syz-executor 297 311148 4402 0 3 0x82 nanoslp syz-executor 40661 27692 4402 0 3 0x82 nanoslp syz-executor 4402 287205 25738 0 3 0x82 kqread syz-executor 25738 205982 10429 0 3 0x10008a sigsusp ksh 10429 306843 98435 0 3 0x98 kqread sshd-session 98435 27335 9321 0 3 0x92 kqread sshd-session 67470 186248 1 0 3 0x100083 ttyin getty 9321 138771 1 0 3 0x88 kqread sshd 10134 368430 20274 73 3 0x1100090 kqread syslogd 20274 280210 1 0 3 0x100082 sbwait syslogd 82782 172678 1 0 3 0x100080 kqread resolvd 64561 47450 43882 77 3 0x100092 kqread dhcpleased 47915 383306 43882 77 3 0x100092 kqread dhcpleased 43882 143724 1 0 3 0x80 kqread dhcpleased 37320 399904 0 0 3 0x14200 bored smr 39797 222699 0 0 2 0x14200 zerothread 24208 467271 0 0 3 0x14200 aiodoned aiodoned 15207 146025 0 0 3 0x14200 syncer update 25714 353946 0 0 3 0x14200 cleaner cleaner 87791 89970 0 0 3 0x14200 reaper reaper 79117 435806 0 0 3 0x14200 pgdaemon pagedaemon 61013 326131 0 0 3 0x14200 bored viomb 57500 134963 0 0 3 0x40014200 acpi0 acpi0 70938 351855 0 0 3 0x14200 bored softnet3 33897 222819 0 0 3 0x14200 bored softnet2 5240 179956 0 0 3 0x14200 bored softnet1 483 419122 0 0 2 0x14200 softnet0 90200 111181 0 0 3 0x14200 bored systqmp 90786 294436 0 0 3 0x14200 bored systq 65725 41658 0 0 3 0x40014200 tmoslp softclock 467 59998 0 0 3 0x40014200 idle0 1 335920 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 10172 11046K 11851K 166960K 11469 0 pcb 18 13K 14K 166960K 77 0 rtable 222 9K 9K 166960K 371 0 pf 30 12K 13K 166960K 39 0 ifaddr 43 7K 7K 166960K 49 0 ifgroup 50 2K 2K 166960K 56 0 sysctl 1 1K 9K 166960K 6 0 counters 32 17K 18K 166960K 39 0 ioctlops 0 0K 4K 166960K 78 0 iov 0 0K 12K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1375 86K 87K 166960K 1441 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 5 0K 0K 166960K 5 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 200 0 sigio 0 0K 0K 166960K 5 0 proc 60 59K 108K 166960K 486 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 8 0 in_multi 102 7K 7K 166960K 107 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 351 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 235 143K 151K 166960K 3367 0 UVM aobj 7 2K 2K 166960K 7 0 pinsyscall 39 78K 92K 166960K 1229 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 34 0 NDP 11 0K 2K 166960K 30 0 temp 39 8679K 8743K 166960K 4204 0 kqueue 14 22K 28K 166960K 46 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 45 0 41 1 0 1 1 0 8 0 rtentry 136 113 0 13 4 0 4 4 0 8 0 unpcb 144 63 0 48 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 22 0 18 1 0 1 1 0 8 0 arp 88 18 0 0 1 0 1 1 0 8 0 inpcb 328 214 0 204 7 0 7 7 0 8 5 nd6 104 25 0 1 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 7 0 7 2 1 1 1 0 8 1 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 499 0 56 30 1 29 29 0 8 1 art_table 32 500 0 56 4 0 4 4 0 8 0 art_node 16 112 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 112 3 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1674 0 173 95 0 95 95 0 8 0 ffsino 248 1674 0 173 95 0 95 95 0 8 0 nchpl 144 1943 0 264 63 0 63 63 0 8 0 rtmask 32 2 0 2 2 1 1 1 0 8 1 uvmvnodes 80 1818 0 0 38 0 38 38 0 8 0 vnodes 216 1818 0 0 101 0 101 101 0 8 0 namei 1024 6045 0 6045 2 1 1 2 0 8 1 kstatmem 264 28 0 6 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6185 0 6185 4 3 1 4 1 8 1 plimitpl 152 35 0 18 1 0 1 1 0 8 0 sigapl 424 479 0 433 6 0 6 6 0 8 0 knotepl 120 6687 0 6639 16 6 10 10 0 8 8 kqueuepl 184 115 0 105 4 1 3 3 0 8 2 pipepl 296 112 0 83 3 0 3 3 0 8 0 fdescpl 440 463 0 433 5 1 4 5 0 8 0 filepl 120 2011 0 1790 9 0 9 9 0 8 2 lockfpl 104 14 0 12 1 0 1 1 0 8 0 lockfspl 48 8 0 6 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 29 0 13 1 0 1 1 0 8 0 ucredpl 104 141 0 129 1 0 1 1 0 8 0 zombiepl 144 472 0 471 1 0 1 1 0 8 0 processpl 1160 479 0 433 4 0 4 4 0 8 0 procpl 656 603 0 544 6 0 6 6 0 8 0 sockpl 528 322 0 293 7 0 7 7 0 8 4 mcl64k 65536 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 2 1 1 1 0 8 1 mcl4k 4096 2499 0 2445 16 8 8 16 0 8 0 mcl2k 2048 205 0 203 1 0 1 1 0 8 0 mtagpl 96 8 0 6 2 1 1 1 0 8 0 mbufpl 256 4788 0 4629 11 0 11 11 0 8 0 bufpl 280 2336 0 121 159 0 159 159 0 8 0 anonpl 24 69602 0 66401 45 0 45 45 0 187 22 amapchunkpl 152 9123 0 8610 26 0 26 26 0 158 3 amappl16 200 667 0 640 14 4 10 14 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 102 0 92 1 0 1 1 0 8 0 amappl13 176 2 0 2 1 1 0 1 0 8 0 amappl12 168 1067 0 1037 2 0 2 2 0 8 0 amappl11 160 41 0 31 1 0 1 1 0 8 0 amappl10 152 64 0 64 1 1 0 1 0 8 0 amappl9 144 253 0 253 1 1 0 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 95 0 83 1 0 1 1 0 8 0 amappl6 120 169 0 166 1 0 1 1 0 8 0 amappl5 112 110 0 104 1 0 1 1 0 8 0 amappl4 104 284 0 268 1 0 1 1 0 8 0 amappl3 96 1625 0 1510 3 0 3 3 0 8 0 amappl2 88 605 0 550 2 0 2 2 0 8 0 amappl1 80 8095 0 7541 13 0 13 13 0 8 1 amappl 88 2717 0 2545 5 0 5 5 0 92 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 1 1 1 0 8 1 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 463 0 433 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 463 0 433 1 0 1 1 0 8 0 vmmpekpl 168 5321 0 5279 3 0 3 3 0 8 1 vmmpepl 168 34578 0 32679 94 1 93 93 0 357 9 vmsppl 360 462 0 433 4 1 3 4 0 8 0 rwobjpl 32 13138 0 10462 23 0 23 23 0 8 0 pdppl 4096 933 0 866 93 26 67 79 0 8 0 pvpl 32 197150 0 188090 115 1 114 114 0 265 34 pmappl 216 462 0 433 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 260 0 40 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83431600) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ddfbd,ffffffff833a8ebc,83,ffffffff8342758f) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(98,21) at rtmap_grow+0x1f3 sys/net/rtable.c:131 rtable_add(97) at rtable_add+0x279 sys/net/rtable.c:-1 if_createrdomain(97,ffff8000013f0800) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff8000014b98f0,8020699f,ffff80003c9ad1d0,ffff80002d4f74a8) at ifioctl+0x19be sys/net/if.c:2315 sys_ioctl(ffff80002d4f74a8,ffff80003c9ad3b0,ffff80003c9ad300) at sys_ioctl+0x5bf sys/kern/sys_generic.c:-1 syscall(ffff80003c9ad3b0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9ad3b0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe16c9a8b2c0, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83431600) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833ddfbd,ffffffff833a8ebc,83,ffffffff8342758f) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(98,21) at rtmap_grow+0x1f3 sys/net/rtable.c:131 rtable_add(97) at rtable_add+0x279 sys/net/rtable.c:-1 if_createrdomain(97,ffff8000013f0800) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff8000014b98f0,8020699f,ffff80003c9ad1d0,ffff80002d4f74a8) at ifioctl+0x19be sys/net/if.c:2315 sys_ioctl(ffff80002d4f74a8,ffff80003c9ad3b0,ffff80003c9ad300) at sys_ioctl+0x5bf sys/kern/sys_generic.c:-1 syscall(ffff80003c9ad3b0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9ad3b0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe16c9a8b2c0, count: -10