panic: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/main/kernel/sys/net/rtable.c", line 132 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *306788 30894 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8337c435) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833b8bf9,ffffffff8339a7fd,84,ffffffff83410ffa) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(6,21) at rtmap_grow+0x1f2 rtable_add(5) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(5) at rtable_add+0x289 sys/net/rtable.c:223 route_output(fffffd807ff3d900,ffff80000148c8b0) at route_output+0x564 sys/net/rtsock.c:766 route_send(ffff80000148c8b0,fffffd807ff3d900,0,0) at route_send+0xd7 sys/net/rtsock.c:322 sosend(ffff80000148c8b0,0,ffff80003c96ba88,0,0,40c) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a776008,3,ffff80003c96bb80,40c,ffff80003c96bc20) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80002a776008,ffff80003c96bcd0,ffff80003c96bc20) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80003c96bcd0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96bcd0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xefab51fb800, count: 3 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 132 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8337c435) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833b8bf9,ffffffff8339a7fd,84,ffffffff83410ffa) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(6,21) at rtmap_grow+0x1f2 rtable_add(5) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(5) at rtable_add+0x289 sys/net/rtable.c:223 route_output(fffffd807ff3d900,ffff80000148c8b0) at route_output+0x564 sys/net/rtsock.c:766 route_send(ffff80000148c8b0,fffffd807ff3d900,0,0) at route_send+0xd7 sys/net/rtsock.c:322 sosend(ffff80000148c8b0,0,ffff80003c96ba88,0,0,40c) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a776008,3,ffff80003c96bb80,40c,ffff80003c96bc20) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80002a776008,ffff80003c96bcd0,ffff80003c96bc20) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80003c96bcd0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96bcd0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xefab51fb800, count: -12 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80003c96b6a0 rbx 0x21 rdx 0xffff800001468a80 rcx 0 rax 0xffff80002a776008 r8 0x101010101010101 r9 0x8080808080808080 r10 0x15ca79566211a767 r11 0x1c037d0ec87c9a23 r12 0 r13 0x1 r14 0 r15 0x1 rip 0xffffffff82ea9f55 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c96b690 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=306788 pid=30894 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=80, usrpri=80, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c93a7e8,0xffff80002a7bcd20 process=0xffff8000ffffb198 user=0xffff80003c966000, vmspace=0xfffffd800dc262f8 estcpu=30, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 7234 348256 17671 0 2 0 syz-executor 7234 353110 17671 0 2 0x4000000 syz-executor 7234 63904 17671 0 2 0x4000000 syz-executor 65594 241425 89038 0 2 0 syz-executor 65594 425624 89038 0 3 0x4000080 fsleep syz-executor 65594 522464 89038 0 2 0x4000000 syz-executor 8467 444407 78317 0 2 0 syz-executor 8467 484288 78317 0 2 0x4000000 syz-executor 8467 429542 78317 0 2 0x4000000 syz-executor 30894 24680 9671 0 3 0x80 nanoslp syz-executor 30894 403383 9671 0 2 0x4000000 syz-executor *30894 306788 9671 0 7 0x4000000 syz-executor 1105 150862 83898 0 3 0x80 nanoslp syz-executor 1105 35945 83898 0 3 0x4000080 msgwait syz-executor 1105 108076 83898 0 3 0x4000080 fsleep syz-executor 50467 78761 99439 0 2 0 syz-executor 50467 233543 99439 0 3 0x4000080 sbwait syz-executor 50467 269673 99439 0 3 0x4000080 fsleep syz-executor 50467 402689 99439 0 3 0x4000080 fsleep syz-executor 81196 406673 1164 0 2 0x3 syz-executor 83898 422683 1164 0 2 0x3 syz-executor 99439 244577 1164 0 2 0x3 syz-executor 9671 83525 1164 0 2 0x3 syz-executor 54995 522077 1164 0 2 0x2 syz-executor 17671 467990 1164 0 3 0x82 nanoslp syz-executor 89038 447675 1164 0 3 0x82 nanoslp syz-executor 78317 170277 1164 0 3 0x82 nanoslp syz-executor 1164 297387 38236 0 3 0x82 kqread syz-executor 38236 161772 17430 0 3 0x10008a sigsusp ksh 17430 486843 78182 0 3 0x98 kqread sshd-session 78182 398537 53339 0 3 0x92 kqread sshd-session 65767 86644 1 0 3 0x100083 ttyopn getty 53339 423523 1 0 3 0x88 kqread sshd 37347 348971 23419 73 3 0x1100090 kqread syslogd 23419 331938 1 0 3 0x100082 sbwait syslogd 61037 464293 1 0 3 0x100080 kqread resolvd 49475 124490 68595 77 3 0x100092 kqread dhcpleased 33370 82427 68595 77 3 0x100092 kqread dhcpleased 68595 345210 1 0 3 0x80 kqread dhcpleased 31223 485939 0 0 2 0x14200 smr 33590 73664 0 0 2 0x14200 zerothread 84650 45606 0 0 3 0x14200 aiodoned aiodoned 69552 241294 0 0 3 0x14200 syncer update 95195 350257 0 0 3 0x14200 cleaner cleaner 2435 31308 0 0 3 0x14200 reaper reaper 72907 456305 0 0 3 0x14200 pgdaemon pagedaemon 33362 201981 0 0 3 0x14200 bored viomb 22325 108656 0 0 3 0x40014200 acpi0 acpi0 14137 9519 0 0 3 0x14200 bored softnet0 41413 293875 0 0 3 0x14200 smrbar systqmp 40671 406175 0 0 3 0x14200 bored systq 50511 408966 0 0 3 0x40014200 tmoslp softclock 7661 18733 0 0 3 0x40014200 idle0 1 235802 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 10188 11268K 11300K 166960K 11488 0 pcb 19 12K 12K 166960K 49 0 rtable 252 8K 8K 166960K 372 0 pf 31 13K 13K 166960K 35 0 ifaddr 42 7K 7K 166960K 46 0 ifgroup 50 2K 2K 166960K 54 0 sysctl 1 1K 9K 166960K 5 0 counters 33 17K 18K 166960K 39 0 ioctlops 0 0K 4K 166960K 46 0 iov 0 0K 16K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1344 85K 85K 166960K 1465 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 6 0K 0K 166960K 7 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 245 0 proc 60 59K 108K 166960K 478 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 99 7K 7K 166960K 99 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 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 366 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 227 150K 159K 166960K 4005 0 UVM aobj 6 4K 4K 166960K 6 0 pinsyscall 38 76K 96K 166960K 1318 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 11 0K 2K 166960K 29 0 temp 37 8660K 8730K 166960K 8900 0 kqueue 15 24K 24K 166960K 35 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 46 0 41 1 0 1 1 0 8 0 rtentry 136 112 0 1 4 0 4 4 0 8 0 unpcb 144 113 0 89 2 0 2 2 0 8 1 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 103 0 95 7 0 7 7 0 8 6 arp 96 18 0 0 1 0 1 1 0 8 0 inpcb 328 277 0 262 8 1 7 7 0 8 5 nd6 112 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 6 0 6 1 0 1 1 0 8 1 pfstscr 40 2 0 2 2 1 1 1 0 8 1 pfstkey 128 4 0 4 2 1 1 1 0 8 1 pfstate 384 2 0 2 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 459 0 0 29 0 29 29 0 8 0 art_table 40 460 0 0 5 0 5 5 0 8 0 art_node 32 112 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 5 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1740 0 235 95 0 95 95 0 8 0 ffsino 256 1740 0 235 95 0 95 95 0 8 0 nchpl 144 2098 0 407 63 0 63 63 0 8 0 rtmask 32 4 0 4 1 0 1 1 0 8 1 vnodes 216 1898 0 0 106 0 106 106 0 8 0 namei 1024 6104 0 6104 2 1 1 2 0 8 1 vcpupl 3904 1 0 0 1 0 1 1 0 8 0 vmpool 800 1 0 0 1 0 1 1 0 8 0 kstatmem 264 26 0 4 2 0 2 2 0 8 0 scxspl 216 7021 0 7021 9 1 8 8 1 8 8 plimitpl 152 54 0 38 1 0 1 1 0 8 0 sigapl 424 532 0 490 6 0 6 6 0 8 1 knotepl 120 6758 0 6640 9 0 9 9 0 8 5 kqueuepl 184 52 0 38 1 0 1 1 0 8 0 pipepl 304 115 0 87 3 0 3 3 0 8 0 fdescpl 448 519 0 490 5 0 5 5 0 8 1 filepl 120 2194 0 1960 10 0 10 10 0 8 2 lockfpl 104 124 0 121 1 0 1 1 0 8 0 lockfspl 48 27 0 24 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 30 0 14 1 0 1 1 0 8 0 ucredpl 104 185 0 174 1 0 1 1 0 8 0 zombiepl 144 575 0 574 2 1 1 1 0 8 0 processpl 1152 532 0 490 4 0 4 4 0 8 0 procpl 664 739 0 683 5 0 5 5 0 8 0 sockpl 552 450 0 406 8 0 8 8 0 8 4 mcl64k 65536 6 0 6 2 1 1 1 0 8 1 mcl8k 8192 5 0 5 2 1 1 1 0 8 1 mcl4k 4096 2606 0 2554 16 8 8 15 0 8 0 mcl2k 2048 395 0 390 1 0 1 1 0 8 0 mtagpl 96 17 0 4 1 0 1 1 0 8 0 mbufpl 256 5154 0 4929 15 0 15 15 0 8 0 bufpl 280 2500 0 118 171 0 171 171 0 8 0 anonpl 24 115272 0 112092 36 4 32 32 0 187 8 amapchunkpl 152 11872 0 11393 24 0 24 24 0 158 4 amappl16 200 2192 0 2164 5 3 2 5 0 8 0 amappl15 192 4 0 3 1 0 1 1 0 8 0 amappl14 184 8 0 8 1 1 0 1 0 8 0 amappl13 176 405 0 404 1 0 1 1 0 8 0 amappl12 168 857 0 819 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 66 0 56 1 0 1 1 0 8 0 amappl9 144 254 0 254 1 1 0 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 94 0 93 1 0 1 1 0 8 0 amappl6 120 269 0 257 1 0 1 1 0 8 0 amappl5 112 71 0 64 1 0 1 1 0 8 0 amappl4 104 375 0 352 1 0 1 1 0 8 0 amappl3 96 1995 0 1889 3 0 3 3 0 8 0 amappl2 88 517 0 464 2 0 2 2 0 8 0 amappl1 80 9469 0 8933 14 1 13 13 0 8 1 amappl 88 3293 0 3133 4 0 4 4 0 92 0 uvmvnodes 80 99 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 8 0 8 2 1 1 1 0 8 1 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 72 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 519 0 490 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 519 0 490 1 0 1 1 0 8 0 vmmpekpl 168 6003 0 5974 2 0 2 2 0 8 0 vmmpepl 168 41279 0 39497 86 0 86 86 0 357 6 vmsppl 368 518 0 490 4 0 4 4 0 8 1 rwobjpl 40 14768 0 13832 12 1 11 11 0 8 0 pdppl 4096 1046 0 981 98 31 67 82 0 8 2 pvpl 32 263405 0 254483 97 0 97 97 0 265 18 pmappl 216 519 0 490 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 381 0 45 10 0 10 10 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(ffffffff8337c435) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833b8bf9,ffffffff8339a7fd,84,ffffffff83410ffa) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(6,21) at rtmap_grow+0x1f2 rtable_add(5) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(5) at rtable_add+0x289 sys/net/rtable.c:223 route_output(fffffd807ff3d900,ffff80000148c8b0) at route_output+0x564 sys/net/rtsock.c:766 route_send(ffff80000148c8b0,fffffd807ff3d900,0,0) at route_send+0xd7 sys/net/rtsock.c:322 sosend(ffff80000148c8b0,0,ffff80003c96ba88,0,0,40c) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a776008,3,ffff80003c96bb80,40c,ffff80003c96bc20) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80002a776008,ffff80003c96bcd0,ffff80003c96bc20) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80003c96bcd0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96bcd0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xefab51fb800, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8337c435) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff833b8bf9,ffffffff8339a7fd,84,ffffffff83410ffa) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(6,21) at rtmap_grow+0x1f2 rtable_add(5) at rtable_add+0x289 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(5) at rtable_add+0x289 sys/net/rtable.c:223 route_output(fffffd807ff3d900,ffff80000148c8b0) at route_output+0x564 sys/net/rtsock.c:766 route_send(ffff80000148c8b0,fffffd807ff3d900,0,0) at route_send+0xd7 sys/net/rtsock.c:322 sosend(ffff80000148c8b0,0,ffff80003c96ba88,0,0,40c) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80002a776008,3,ffff80003c96bb80,40c,ffff80003c96bc20) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80002a776008,ffff80003c96bcd0,ffff80003c96bc20) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80003c96bcd0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96bcd0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xefab51fb800, count: -12