panic: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/main/kernel/sys/net/rtable.c", line 130 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *118762 30942 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83434002) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833dfac9,ffffffff833acdb1,82,ffffffff8342bee9) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(9,21) at rtmap_grow+0x1f3 sys/net/rtable.c:130 rtable_add(8) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:374 [inline] rtable_add(8) at rtable_add+0x289 sys/net/rtable.c:221 if_createrdomain(8,ffff80000145a000) at if_createrdomain+0x40 sys/net/if.c:1953 ifioctl(ffff800010fd3508,8020699f,ffff80003c9412f0,ffff80003c94f9d8) at ifioctl+0x19be sys/net/if.c:2302 sys_ioctl(ffff80003c94f9d8,ffff80003c9414d0,ffff80003c941420) at sys_ioctl+0x5bf sys/kern/sys_generic.c:-1 syscall(ffff80003c9414d0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9414d0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1fe5b85fa0, 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 130 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83434002) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833dfac9,ffffffff833acdb1,82,ffffffff8342bee9) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(9,21) at rtmap_grow+0x1f3 sys/net/rtable.c:130 rtable_add(8) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:374 [inline] rtable_add(8) at rtable_add+0x289 sys/net/rtable.c:221 if_createrdomain(8,ffff80000145a000) at if_createrdomain+0x40 sys/net/if.c:1953 ifioctl(ffff800010fd3508,8020699f,ffff80003c9412f0,ffff80003c94f9d8) at ifioctl+0x19be sys/net/if.c:2302 sys_ioctl(ffff80003c94f9d8,ffff80003c9414d0,ffff80003c941420) at sys_ioctl+0x5bf sys/kern/sys_generic.c:-1 syscall(ffff80003c9414d0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9414d0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1fe5b85fa0, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c941020 rbx 0x21 rdx 0 rcx 0 rax 0xffff80003c94f9d8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x5dc86dcd460d2184 r11 0x5d0887e489d71497 r12 0 r13 0x6 r14 0 r15 0x1 rip 0xffffffff82c0eb05 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c941010 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=118762 pid=30942 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=82, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c94e038,0xffff80003c94ed18 process=0xffff80003c998930 user=0xffff80003c93c000, vmspace=0xfffffd8076b989e8 estcpu=33, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 78874 390737 6783 0 2 0 syz-executor 82156 277676 80759 0 2 0 syz-executor 82676 195817 69972 0 2 0 syz-executor 82676 154991 69972 0 3 0x4000080 fsleep syz-executor 30942 367824 78693 0 2 0 syz-executor 30942 90601 78693 0 2 0x4000000 syz-executor *30942 118762 78693 0 7 0x4000000 syz-executor 29016 431976 52593 0 2 0 syz-executor 29016 513731 52593 0 3 0x4000080 msgwait syz-executor 29016 193458 52593 0 3 0x4000080 fsleep syz-executor 29016 254438 52593 0 3 0x4000080 fsleep syz-executor 78693 289511 3946 0 2 0x3 syz-executor 56291 149266 0 0 3 0x14200 acct acct 60925 152053 0 0 3 0x14280 nfsidl nfsio 55415 420002 0 0 3 0x14280 nfsidl nfsio 56061 444338 0 0 3 0x14280 nfsidl nfsio 15579 39018 0 0 3 0x14280 nfsidl nfsio 42426 297591 0 0 3 0x14280 nfsidl nfsio 92233 450405 0 0 3 0x14280 nfsidl nfsio 3501 21268 0 0 3 0x14280 nfsidl nfsio 6390 148993 0 0 3 0x14280 nfsidl nfsio 58645 177778 0 0 3 0x14280 nfsidl nfsio 43461 235512 0 0 3 0x14280 nfsidl nfsio 72044 71526 0 0 3 0x14280 nfsidl nfsio 3704 286479 0 0 3 0x14280 nfsidl nfsio 46373 151919 0 0 3 0x14280 nfsidl nfsio 47812 420723 0 0 3 0x14280 nfsidl nfsio 77558 520814 0 0 3 0x14280 nfsidl nfsio 74747 9387 0 0 3 0x14280 nfsidl nfsio 9276 425452 0 0 3 0x14280 nfsidl nfsio 73292 245028 0 0 3 0x14280 nfsidl nfsio 99692 81192 0 0 3 0x14280 nfsidl nfsio 34735 101547 0 0 3 0x14280 nfsidl nfsio 81032 248186 0 0 3 0x14200 bored sosplice 80759 67349 3946 0 2 0x3 syz-executor 6783 189414 3946 0 2 0x3 syz-executor 69972 118477 3946 0 3 0x82 nanoslp syz-executor 50945 163428 3946 0 2 0x3 syz-executor 2450 99286 3946 0 3 0x82 nanoslp syz-executor 21700 329714 3946 0 2 0x3 syz-executor 52593 352621 3946 0 2 0x3 syz-executor 3946 151453 98512 0 3 0x82 kqread syz-executor 98512 342466 39696 0 3 0x10008a sigsusp ksh 39696 21701 62321 0 3 0x98 kqread sshd-session 62321 199440 25338 0 3 0x92 kqread sshd-session 70981 375558 1 0 3 0x100083 ttyopn getty 25338 109122 1 0 3 0x88 kqread sshd 8108 452450 91427 73 3 0x1100090 kqread syslogd 91427 400637 1 0 3 0x100082 sbwait syslogd 38342 137704 1 0 3 0x100080 kqread resolvd 12945 444604 96162 77 3 0x100092 kqread dhcpleased 56881 475593 96162 77 3 0x100092 kqread dhcpleased 96162 196341 1 0 3 0x80 kqread dhcpleased 13397 417442 0 0 3 0x14200 bored smr 99116 312798 0 0 2 0x14200 zerothread 157 484256 0 0 3 0x14200 aiodoned aiodoned 55579 366054 0 0 3 0x14200 syncer update 82545 361160 0 0 3 0x14200 cleaner cleaner 30545 398298 0 0 3 0x14200 reaper reaper 61217 121796 0 0 3 0x14200 pgdaemon pagedaemon 81775 147219 0 0 3 0x14200 bored viomb 84548 372427 0 0 3 0x40014200 acpi0 acpi0 87174 278048 0 0 3 0x14200 bored softnet3 2004 282592 0 0 3 0x14200 bored softnet2 59498 170894 0 0 3 0x14200 bored softnet1 57126 147428 0 0 3 0x14200 bored softnet0 75359 15798 0 0 3 0x14200 bored systqmp 71910 225596 0 0 3 0x14200 bored systq 71579 282805 0 0 2 0x40014200 softclock 87118 165825 0 0 3 0x40014200 idle0 1 301193 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 10174 11041K 11502K 166960K 11956 0 pcb 19 14K 16K 166960K 278 0 rtable 232 8K 8K 166960K 445 0 pf 34 13K 17K 166960K 180 0 ifaddr 42 7K 8K 166960K 63 0 ifgroup 50 2K 2K 166960K 86 0 sysctl 3 1K 9K 166960K 9 0 counters 32 17K 18K 166960K 48 0 ioctlops 0 0K 4K 166960K 257 0 iov 0 0K 16K 166960K 31 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1402 88K 89K 166960K 1804 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 29 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 543 0 sigio 0 0K 0K 166960K 3 0 proc 60 59K 100K 166960K 536 0 subproc 72 4K 4K 166960K 96 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 50 0 in_multi 99 7K 7K 166960K 121 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 435 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 217 158K 173K 166960K 6424 0 UVM aobj 14 2K 2K 166960K 15 0 pinsyscall 38 76K 95K 166960K 1591 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 11 0K 2K 166960K 40 0 temp 40 8675K 8754K 166960K 15027 0 kqueue 13 20K 28K 166960K 87 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 62 0 59 1 0 1 1 0 8 0 rtentry 136 133 0 33 4 0 4 4 0 8 0 unpcb 144 302 0 285 4 2 2 4 0 8 1 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 143 0 139 4 3 1 4 0 8 0 arp 88 21 0 3 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 328 584 0 575 12 5 7 7 0 8 6 ip6q 72 6 0 4 2 1 1 1 0 8 0 ip6af 40 10 0 8 2 1 1 1 0 8 0 nd6 104 31 0 5 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1072 11 0 11 1 0 1 1 0 8 1 pppxif 1384 1 0 1 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstitem 24 3 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 4 1 0 1 1 0 8 0 pfstate 384 4 0 2 1 0 1 1 0 8 0 pfrule 1344 4 0 4 1 1 0 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 575 0 134 29 1 28 29 0 8 0 art_table 32 577 0 134 4 0 4 4 0 8 0 art_node 16 132 0 42 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 112 25 0 15 1 0 1 1 0 8 0 shmpl 112 12 0 1 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2289 0 793 95 0 95 95 0 8 0 ffsino 248 2289 0 793 95 0 95 95 0 8 0 nchpl 144 3030 0 1352 63 0 63 63 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 uvmvnodes 80 2658 0 0 55 0 55 55 0 8 0 vnodes 216 2658 0 0 148 0 148 148 0 8 0 namei 1024 10310 0 10310 3 2 1 2 0 8 1 kstatmem 264 44 0 22 2 0 2 2 0 8 0 scsiplug 72 7 0 7 2 1 1 1 0 8 1 scxspl 216 10056 0 10056 8 7 1 8 1 8 1 plimitpl 152 176 0 160 1 0 1 1 0 8 0 sigapl 424 840 0 773 8 0 8 8 0 8 0 knotepl 120 18367 0 18320 22 13 9 16 0 8 5 kqueuepl 184 177 0 168 3 2 1 3 0 8 0 pipepl 296 199 0 172 3 0 3 3 0 8 0 fdescpl 440 802 0 773 5 1 4 5 0 8 0 filepl 120 4562 0 4348 14 4 10 12 0 8 2 lockfpl 104 306 0 302 2 1 1 2 0 8 0 lockfspl 48 151 0 147 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 38 0 22 1 0 1 1 0 8 0 ucredpl 104 600 0 589 1 0 1 1 0 8 0 zombiepl 144 838 0 836 1 0 1 1 0 8 0 processpl 1160 840 0 773 5 0 5 5 0 8 0 procpl 656 1437 0 1364 8 0 8 8 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 528 966 0 936 14 7 7 11 0 8 4 mcl64k 65536 28 0 28 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 24 0 24 2 1 1 1 0 8 1 mcl4k 4096 2986 0 2936 14 6 8 14 0 8 0 mcl2k 2048 746 0 743 2 1 1 2 0 8 0 mtagpl 96 14 0 4 1 0 1 1 0 8 0 mbufpl 256 8965 0 8759 15 0 15 15 0 8 1 bufpl 280 3374 0 122 233 0 233 233 0 8 0 anonpl 24 133938 0 130846 68 23 45 45 0 187 23 amapchunkpl 152 19904 0 19468 30 7 23 28 0 158 2 amappl16 200 2636 0 2609 19 8 11 11 0 8 8 amappl15 192 11 0 10 1 0 1 1 0 8 0 amappl14 184 206 0 196 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1423 0 1394 3 1 2 3 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 5 0 5 2 1 1 1 0 8 1 amappl9 144 245 0 244 1 0 1 1 0 8 0 amappl8 136 23 0 22 1 0 1 1 0 8 0 amappl7 128 99 0 89 1 0 1 1 0 8 0 amappl6 120 184 0 181 1 0 1 1 0 8 0 amappl5 112 129 0 122 1 0 1 1 0 8 0 amappl4 104 298 0 282 1 0 1 1 0 8 0 amappl3 96 3849 0 3750 4 0 4 4 0 8 0 amappl2 88 620 0 565 2 0 2 2 0 8 0 amappl1 80 9434 0 8893 13 1 12 13 0 8 0 amappl 88 5701 0 5548 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 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 7 0 7 1 1 0 1 0 8 0 dma128 128 254 0 254 1 1 0 1 0 8 0 dma64 64 7 0 7 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 14 0 1 1 0 1 1 0 8 0 uaddrrnd 24 802 0 773 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 802 0 773 1 0 1 1 0 8 0 vmmpekpl 168 7817 0 7778 3 1 2 3 0 8 0 vmmpepl 168 55586 0 53785 97 7 90 90 0 357 8 vmsppl 360 801 0 773 4 1 3 4 0 8 0 rwobjpl 32 19375 0 15889 30 0 30 30 0 8 1 pdppl 4096 1611 0 1546 101 34 67 81 0 8 2 pvpl 32 356130 0 347791 146 32 114 115 0 265 30 pmappl 216 801 0 773 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 279 0 55 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(ffffffff83434002) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833dfac9,ffffffff833acdb1,82,ffffffff8342bee9) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(9,21) at rtmap_grow+0x1f3 sys/net/rtable.c:130 rtable_add(8) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:374 [inline] rtable_add(8) at rtable_add+0x289 sys/net/rtable.c:221 if_createrdomain(8,ffff80000145a000) at if_createrdomain+0x40 sys/net/if.c:1953 ifioctl(ffff800010fd3508,8020699f,ffff80003c9412f0,ffff80003c94f9d8) at ifioctl+0x19be sys/net/if.c:2302 sys_ioctl(ffff80003c94f9d8,ffff80003c9414d0,ffff80003c941420) at sys_ioctl+0x5bf sys/kern/sys_generic.c:-1 syscall(ffff80003c9414d0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9414d0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1fe5b85fa0, 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(ffffffff83434002) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833dfac9,ffffffff833acdb1,82,ffffffff8342bee9) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(9,21) at rtmap_grow+0x1f3 sys/net/rtable.c:130 rtable_add(8) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:374 [inline] rtable_add(8) at rtable_add+0x289 sys/net/rtable.c:221 if_createrdomain(8,ffff80000145a000) at if_createrdomain+0x40 sys/net/if.c:1953 ifioctl(ffff800010fd3508,8020699f,ffff80003c9412f0,ffff80003c94f9d8) at ifioctl+0x19be sys/net/if.c:2302 sys_ioctl(ffff80003c94f9d8,ffff80003c9414d0,ffff80003c941420) at sys_ioctl+0x5bf sys/kern/sys_generic.c:-1 syscall(ffff80003c9414d0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9414d0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa1fe5b85fa0, count: -10