panic: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/multicore/kernel/sys/net/rtable.c", line 131 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 46937 78057 0 0x10 0x4000000 0 syz-executor 345947 96840 0 0x2 0x1 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8346b76f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83417720,ffffffff83341d4d,83,ffffffff834618d5) at __assert+0x29 sys/kern/subr_prf.c:-1 rtable_init() at rtable_init rtable_add(16) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:373 [inline] rtable_add(16) at rtable_add+0x2d9 sys/net/rtable.c:222 if_createrdomain(16,ffff800001494800) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff800001457c80,8020699f,ffff80003c45cf40,ffff8000fffea7d8) at ifioctl+0x1a1e sys/net/if.c:2315 sys_ioctl(ffff8000fffea7d8,ffff80003c45d120,ffff80003c45d070) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff80003c45d120) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45d120) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f05bf24a00, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/multicore/kernel/sys/net/rtable.c", line 131 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8346b76f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83417720,ffffffff83341d4d,83,ffffffff834618d5) at __assert+0x29 sys/kern/subr_prf.c:-1 rtable_init() at rtable_init rtable_add(16) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:373 [inline] rtable_add(16) at rtable_add+0x2d9 sys/net/rtable.c:222 if_createrdomain(16,ffff800001494800) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff800001457c80,8020699f,ffff80003c45cf40,ffff8000fffea7d8) at ifioctl+0x1a1e sys/net/if.c:2315 sys_ioctl(ffff8000fffea7d8,ffff80003c45d120,ffff80003c45d070) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff80003c45d120) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45d120) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f05bf24a00, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c45cc60 rbx 0xffffffff838a3dd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff8000fffea7d8 rax 0xffffffff838a2ff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0x8080808080808080 r10 0xd336bae60ad570b1 r11 0xb0f64e8023b9f59e r12 0xffffffff838a3bd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff82b0f3a5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c45cc50 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=46937 pid=78057 tcnt=3 stat=onproc flags process=10 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffea548,0xffff8000fffead08 process=0xffff80003c41f570 user=0xffff80003c458000, vmspace=0xfffffd806bf64b60 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78057 273854 96840 0 2 0x10 syz-executor *78057 46937 96840 0 7 0x4000010 syz-executor 78057 127802 96840 0 2 0x4000010 syz-executor 86870 255574 98146 0 2 0 syz-executor 86870 481189 98146 0 2 0x4000000 syz-executor 52196 6063 58598 0 2 0 syz-executor 52196 4633 58598 0 3 0x4000080 fsleep syz-executor 23275 251176 13615 0 2 0 syz-executor 23275 483120 13615 0 3 0x4000080 fsleep syz-executor 91601 439849 33011 0 2 0 syz-executor 91601 453729 33011 0 2 0x4000000 syz-executor 20795 97925 85572 0 2 0 syz-executor 20795 27235 85572 0 3 0x4000080 kqsel syz-executor 20795 135578 85572 0 3 0x4000080 fsleep syz-executor 20795 369756 85572 0 3 0x4000080 fsleep syz-executor 39694 173276 39791 0 4 0x82000 syz-executor 39694 366710 39791 0 2 0x4082000 syz-executor 39694 94069 39791 0 2 0x4082c00 syz-executor 39694 216536 39791 0 4 0x4082000 syz-executor 39694 404346 39791 0 3 0x4002000 suspend syz-executor 54407 329109 19797 0 2 0x3 syz-executor 91296 151548 1 0 3 0x100083 ttyin getty 96840 345947 19797 0 7 0x3 syz-executor 73393 507912 0 0 3 0x14200 bored sosplice 85572 446570 19797 0 2 0x2 syz-executor 13615 425260 19797 0 2 0x3 syz-executor 58598 325854 19797 0 3 0x82 nanoslp syz-executor 39791 369231 19797 0 2 0x3 syz-executor 33011 32443 19797 0 2 0x3 syz-executor 98146 66020 19797 0 2 0x2 syz-executor 19797 236567 18016 0 3 0x82 kqread syz-executor 18016 140046 9424 0 3 0x10008a sigsusp ksh 9424 152979 65380 0 3 0x98 kqread sshd-session 65380 436804 64612 0 3 0x92 kqread sshd-session 64612 490103 1 0 3 0x88 kqread sshd 11105 11472 31227 74 3 0x1100092 bpf pflogd 31227 140076 1 0 3 0x80 sbwait pflogd 64237 409878 30721 73 3 0x1100090 kqread syslogd 30721 259892 1 0 3 0x100082 sbwait syslogd 30944 520478 1 0 3 0x100080 kqread resolvd 52073 98895 95209 77 3 0x100092 kqread dhcpleased 49446 278284 95209 77 3 0x100092 kqread dhcpleased 95209 166178 1 0 3 0x80 kqread dhcpleased 25353 439996 0 0 3 0x14200 bored smr 35978 296072 0 0 2 0x14200 zerothread 5542 116368 0 0 3 0x14200 aiodoned aiodoned 33812 282106 0 0 3 0x14200 syncer update 20817 231619 0 0 3 0x14200 cleaner cleaner 59196 501179 0 0 3 0x14200 reaper reaper 99451 185327 0 0 3 0x14200 pgdaemon pagedaemon 8669 474775 0 0 3 0x14200 bored viomb 75267 117081 0 0 3 0x40014200 acpi0 acpi0 52199 303180 0 0 3 0x40014200 idle1 34605 426362 0 0 3 0x14200 bored softnet3 7620 406036 0 0 3 0x14200 bored softnet2 67212 522433 0 0 3 0x14200 bored softnet1 77705 489565 0 0 3 0x14200 bored softnet0 63505 88434 0 0 3 0x14200 bored systqmp 54372 435216 0 0 3 0x14200 bored systq 92239 64888 0 0 3 0x14200 tmoslp softclockmp 78003 171107 0 0 2 0x40014200 softclock 40731 506387 0 0 3 0x40014200 idle0 1 213519 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 78057 (syz-executor) thread 0xffff8000fffea7d8 (46937) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff83901ff8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe5 sys/kern/kern_malloc.c:174 #3 rtmap_grow+0xb2 sys/net/rtable.c:126 #4 rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:373 [inline] #4 rtable_add+0x2d9 sys/net/rtable.c:222 #5 if_createrdomain+0x40 sys/net/if.c:1966 #6 ifioctl+0x1a1e sys/net/if.c:2315 #7 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 #9 Xsyscall+0x128 Process 86870 (syz-executor) thread 0xffff80003c4222c0 (481189) exclusive rwlock vmmaplk r = 0 (0xfffffd806bf648a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1918 #4 uvm_fault_check+0x8a5 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x8a5 sys/uvm/uvm_fault.c:784 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #7 usertrap+0x3e3 sys/arch/amd64/amd64/trap.c:599 #8 recall_trap+0x8 Process 39694 (syz-executor) thread 0xffff8000ffff1210 (366710) exclusive rrwlock inode r = 0 (0xfffffd806e0ff300) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 11222K 11451K 166960K 12073 0 pcb 19 14K 16K 166960K 178 0 rtable 246 9K 9K 166960K 499 0 pf 38 18K 19K 166960K 76 0 ifaddr 46 8K 8K 166960K 71 0 ifgroup 57 2K 2K 166960K 91 0 sysctl 2 1K 9K 166960K 75 0 counters 70 37K 37K 166960K 106 0 ioctlops 0 0K 4K 166960K 1527 0 iov 0 0K 20K 166960K 52 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1391 87K 88K 166960K 1814 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 109 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 106K 166960K 555 0 sigio 0 0K 0K 166960K 8 0 proc 72 91K 140K 166960K 654 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 179 0 in_multi 99 7K 7K 166960K 152 0 ether_multi 1 0K 0K 166960K 6 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 439 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 236 159K 192K 166960K 6692 0 UVM aobj 13 4K 4K 166960K 13 0 pinsyscall 42 84K 104K 166960K 1708 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 22 0 NDP 13 0K 2K 166960K 46 0 temp 54 8689K 8753K 166960K 29095 0 kqueue 14 22K 27K 166960K 100 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 64 0 61 1 0 1 1 0 8 0 rtentry 176 156 0 47 6 0 6 6 0 8 0 unpcb 144 161 0 144 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 84 0 80 1 0 1 1 0 8 0 arp 128 26 0 6 1 0 1 1 0 8 0 inpcb 328 514 0 503 13 10 3 7 0 8 2 nd6 144 36 0 9 1 0 1 1 0 8 0 pkpcb 40 2 0 2 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 14 0 13 2 1 1 1 0 8 0 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pffrag 232 34 0 33 1 0 1 1 0 482 0 pffrnode 88 34 0 33 1 0 1 1 0 8 0 pffrent 40 67 0 66 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 40 0 3 1 0 1 1 0 8 0 pfstkey 128 40 0 3 2 0 2 2 0 8 0 pfstate 384 39 0 3 4 0 4 4 0 8 0 pfrule 1344 26 0 17 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 637 0 182 31 2 29 29 0 8 0 art_table 32 639 0 182 4 0 4 4 0 8 0 art_node 16 153 0 56 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 5 1 0 1 1 0 8 0 semapl 112 107 0 97 1 0 1 1 0 8 0 shmpl 112 10 0 0 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 2275 0 769 95 0 95 95 0 8 0 ffsino 288 2275 0 769 109 0 109 109 0 8 0 nchpl 144 2938 0 1243 64 0 64 64 0 8 0 rtmask 32 3 0 3 2 1 1 1 0 8 1 uvmvnodes 80 2666 0 0 55 0 55 55 0 8 0 vnodes 216 2666 0 0 149 0 149 149 0 8 0 namei 1024 10348 0 10347 2 1 1 1 0 8 0 percpumem 16 68 0 18 1 0 1 1 0 8 0 kstatmem 264 50 0 22 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 11949 0 11949 7 5 2 4 1 8 2 plimitpl 152 134 0 116 1 0 1 1 0 8 0 sigapl 424 843 0 793 8 2 6 7 0 8 0 knotepl 120 319 0 0 10 0 10 10 0 8 0 kqueuepl 224 210 0 198 2 1 1 2 0 8 0 pipepl 336 198 0 170 3 0 3 3 0 8 0 fdescpl 520 823 0 792 3 0 3 3 0 8 0 filepl 160 4166 0 3943 16 3 13 14 0 8 0 lockfpl 104 447 0 444 2 1 1 2 0 8 0 lockfspl 48 121 0 118 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 38 0 21 1 0 1 1 0 8 0 ucredpl 104 502 0 488 1 0 1 1 0 8 0 zombiepl 144 980 0 980 1 0 1 1 0 8 1 processpl 1240 843 0 793 6 1 5 5 0 8 0 procpl 656 1508 0 1445 7 1 6 6 0 8 0 srpgc 96 6 0 6 2 2 0 1 0 8 0 sosppl 168 3 0 3 2 1 1 1 0 8 1 sockpl 728 749 0 718 15 10 5 10 0 8 1 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 44 0 0 6 0 6 6 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 1155 0 0 73 0 73 73 0 8 0 bufpl 280 4528 0 124 315 0 315 315 0 8 0 anonpl 32 7493 0 0 61 0 61 61 0 246 0 amapchunkpl 152 22036 0 21554 43 10 33 38 0 158 9 amappl16 200 3116 0 3020 21 9 12 15 0 8 6 amappl15 192 17 0 17 1 1 0 1 0 8 0 amappl14 184 131 0 119 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1511 0 1479 4 2 2 3 0 8 0 amappl11 160 73 0 59 1 0 1 1 0 8 0 amappl10 152 11 0 11 1 1 0 1 0 8 0 amappl9 144 244 0 244 1 1 0 1 0 8 0 amappl8 136 26 0 24 1 0 1 1 0 8 0 amappl7 128 126 0 114 1 0 1 1 0 8 0 amappl6 120 208 0 205 1 0 1 1 0 8 0 amappl5 112 140 0 130 1 0 1 1 0 8 0 amappl4 104 321 0 302 1 0 1 1 0 8 0 amappl3 96 3934 0 3822 5 1 4 4 0 8 0 amappl2 88 671 0 610 2 0 2 2 0 8 0 amappl1 80 10046 0 9441 15 2 13 15 0 8 0 amappl 88 5912 0 5749 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 128 255 0 255 3 3 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 12 0 0 1 0 1 1 0 8 0 uaddrrnd 24 823 0 792 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 823 0 792 1 0 1 1 0 8 0 vmmpekpl 168 8487 0 8436 4 1 3 3 0 8 0 vmmpepl 168 58180 0 56130 100 1 99 99 0 357 7 vmsppl 480 822 0 792 6 1 5 5 0 8 0 rwobjpl 72 20876 0 17204 67 0 67 67 0 8 0 pdppl 4096 1653 0 1584 101 30 71 85 0 8 2 pvpl 32 15452 0 0 126 1 125 125 0 265 0 pmappl 256 822 0 792 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 451 0 36 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8346b76f) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83417720,ffffffff83341d4d,83,ffffffff834618d5) at __assert+0x29 sys/kern/subr_prf.c:-1 rtable_init() at rtable_init rtable_add(16) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:373 [inline] rtable_add(16) at rtable_add+0x2d9 sys/net/rtable.c:222 if_createrdomain(16,ffff800001494800) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff800001457c80,8020699f,ffff80003c45cf40,ffff8000fffea7d8) at ifioctl+0x1a1e sys/net/if.c:2315 sys_ioctl(ffff8000fffea7d8,ffff80003c45d120,ffff80003c45d070) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff80003c45d120) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45d120) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:742 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5f05bf24a00, count: -10 ddb{0}> machine ddbcpu 1