panic: kernel diagnostic assertion "map->limit == rtmap_limit" failed: file "/syzkaller/managers/multicore/kernel/sys/net/rtable.c", line 132 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 52572 62620 0 0 0x4000000 0 syz-executor 166361 33331 0 0x2 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83393b89) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833d3a85,ffffffff833ce1cd,84,ffffffff83428514) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(a,21) at rtmap_grow+0x24f rtable_add(9) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(9) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(9,ffff800001485000) at if_createrdomain+0x40 sys/net/if.c:1974 ifioctl(ffff800010fb5b68,8020699f,ffff80002a39c520,ffff8000fffed780) at ifioctl+0x1b40 sys/net/if.c:2323 sys_ioctl(ffff8000fffed780,ffff80002a39c700,ffff80002a39c650) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a39c700) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a39c700) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd4fb6e47170, 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 132 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83393b89) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833d3a85,ffffffff833ce1cd,84,ffffffff83428514) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(a,21) at rtmap_grow+0x24f rtable_add(9) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(9) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(9,ffff800001485000) at if_createrdomain+0x40 sys/net/if.c:1974 ifioctl(ffff800010fb5b68,8020699f,ffff80002a39c520,ffff8000fffed780) at ifioctl+0x1b40 sys/net/if.c:2323 sys_ioctl(ffff8000fffed780,ffff80002a39c700,ffff80002a39c650) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a39c700) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a39c700) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd4fb6e47170, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a39c230 rbx 0xffffffff837c6ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff8000fffed780 rax 0xffffffff837c5ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc999714532dcea16 r11 0x158307d5a707bd21 r12 0xffffffff837c6be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff8166e7f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a39c220 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=52572 pid=62620 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffeda18,0xffffffff8392e5e0 process=0xffff8000ffff1828 user=0xffff80002a397000, vmspace=0xfffffd805dfb65e0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93809 289233 48132 0 2 0 syz-executor 62620 242000 96765 0 2 0 syz-executor 62620 496501 96765 0 2 0x4000000 syz-executor *62620 52572 96765 0 7 0x4000000 syz-executor 45692 321835 63930 0 2 0 syz-executor 45692 125291 63930 0 3 0x4000080 fsleep syz-executor 12084 216355 49058 0 2 0 syz-executor 12084 445404 49058 0 3 0x4000080 fsleep syz-executor 19643 57397 33331 60928 3 0x90 nanoslp syz-executor 19643 266110 33331 60928 3 0x4000090 lockf syz-executor 19643 442911 33331 60928 3 0x4000090 fsleep syz-executor 19643 311641 33331 60928 3 0x4000090 fsleep syz-executor 5164 11660 78689 0 2 0 syz-executor 5164 320829 78689 0 2 0x4000000 syz-executor 5164 492720 78689 0 3 0x4000080 fsleep syz-executor 5164 103977 78689 0 2 0x4000000 syz-executor 96765 228512 25421 0 2 0xc82 syz-executor 60302 502954 0 0 3 0x14200 acct acct 60449 291195 1 0 3 0x100083 ttyin getty 52620 303533 25421 0 2 0x2 syz-executor 63930 302649 25421 0 3 0x82 nanoslp syz-executor 49058 261366 25421 0 3 0x82 nanoslp syz-executor 28438 58919 25421 0 3 0x82 piperd syz-executor 78689 175609 25421 0 3 0x82 nanoslp syz-executor 33331 166361 25421 0 7 0x2 syz-executor 48132 363402 25421 0 3 0x82 nanoslp syz-executor 25421 24286 4084 0 2 0x2 syz-executor 4084 12498 8790 0 3 0x10008a sigsusp ksh 8790 98920 53847 0 3 0x98 kqread sshd-session 53847 435991 99213 0 3 0x92 kqread sshd-session 99213 370004 1 0 3 0x88 kqread sshd 25259 24059 28160 74 2 0x1100092 pflogd 28160 396428 1 0 3 0x80 sbwait pflogd 22364 413207 7875 73 3 0x1100090 kqread syslogd 7875 460820 1 0 3 0x100082 sbwait syslogd 18085 349917 1 0 3 0x100080 kqread resolvd 75262 321573 63309 77 3 0x100092 kqread dhcpleased 49649 353826 63309 77 3 0x100092 kqread dhcpleased 63309 304317 1 0 3 0x80 kqread dhcpleased 98483 278676 0 0 3 0x14200 bored smr 38189 519514 0 0 2 0x14200 zerothread 49025 101250 0 0 3 0x14200 aiodoned aiodoned 7614 423045 0 0 3 0x14200 syncer update 25335 355287 0 0 3 0x14200 cleaner cleaner 53708 126787 0 0 3 0x14200 reaper reaper 99162 99023 0 0 3 0x14200 pgdaemon pagedaemon 48247 48637 0 0 3 0x14200 bored viomb 21053 101515 0 0 3 0x40014200 acpi0 acpi0 16704 62514 0 0 3 0x40014200 idle1 80799 519658 0 0 3 0x14200 bored softnet1 91321 495519 0 0 3 0x14200 bored softnet0 17163 398168 0 0 3 0x14200 bored systqmp 18810 368722 0 0 3 0x14200 bored systq 79819 277323 0 0 3 0x14200 tmoslp softclockmp 78171 446243 0 0 3 0x40014200 tmoslp softclock 1307 207 0 0 3 0x40014200 idle0 1 389256 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 62620 (syz-executor) thread 0xffff8000fffed780 (52572) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff839231c8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe3 sys/kern/kern_malloc.c:174 #3 rtmap_grow+0xb2 sys/net/rtable.c:127 #4 rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] #4 rtable_add+0x2d9 sys/net/rtable.c:223 #5 if_createrdomain+0x40 sys/net/if.c:1974 #6 ifioctl+0x1b40 sys/net/if.c:2323 #7 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #9 Xsyscall+0x128 Process 5164 (syz-executor) thread 0xffff8000fffefca8 (320829) exclusive rwlock vmmaplk r = 0 (0xfffffd805dfb6c98) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1902 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:699 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:633 #5 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:510 #7 alltraps_kern_meltdown+0x7b #8 copyout+0x64 #9 mmrw+0x3d6 sys/arch/amd64/amd64/mem.c:-1 #10 spec_read+0x14b sys/kern/spec_vnops.c:215 #11 VOP_READ+0x101 sys/kern/vfs_vops.c:227 #12 vn_read+0x17b sys/kern/vfs_vnops.c:369 #13 dofilereadv+0x25a sys/kern/sys_generic.c:252 #14 sys_preadv+0xe3 sys/kern/vfs_syscalls.c:3336 #15 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #15 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 #16 Xsyscall+0x128 Process 52620 (syz-executor) thread 0xffff8000ffffca68 (303533) exclusive rrwlock inode r = 0 (0xfffffd806e192db0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 sys_getdents+0x254 sys/kern/vfs_syscalls.c:3168 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 11176K 11492K 166960K 12510 0 pcb 19 15K 17K 166960K 320 0 rtable 190 8K 8K 166960K 493 0 pf 38 18K 67486K 166960K 143 0 ifaddr 36 6K 7K 166960K 88 0 ifgroup 56 2K 2K 166960K 137 0 sysctl 4 1K 9K 166960K 20 0 counters 68 36K 38K 166960K 160 0 ioctlops 0 0K 4K 166960K 1707 0 iov 1 2K 28K 166960K 89 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1409 89K 89K 166960K 2187 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 37 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 97K 166960K 989 0 sigio 0 0K 0K 166960K 15 0 proc 72 115K 164K 166960K 652 0 subproc 72 4K 4K 166960K 85 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 311 0 in_multi 67 5K 7K 166960K 155 0 ether_multi 1 0K 0K 166960K 11 0 mrt 2 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 876 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 237 174K 176K 166960K 11041 0 UVM aobj 18 4K 4K 166960K 20 0 pinsyscall 41 82K 106K 166960K 2206 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 153 0 NDP 14 0K 1K 166960K 59 0 temp 73 8658K 8727K 166960K 38350 0 kqueue 13 20K 32K 166960K 185 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 120 267 0 264 5 4 1 3 0 8 0 rtentry 176 145 0 69 5 0 5 5 0 8 0 unpcb 144 855 0 836 10 6 4 6 0 8 3 syncache 336 9 0 9 2 2 0 1 0 8 0 tcpqe 32 2 0 2 1 1 0 1 0 8 0 tcpcb 736 259 0 254 5 4 1 4 0 8 0 arp 136 24 0 8 1 0 1 1 0 8 0 inpcb 328 1108 0 1098 11 4 7 7 0 8 6 nd6 152 28 0 13 1 0 1 1 0 8 0 pkpcb 40 12 0 11 3 2 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 37 0 37 1 0 1 1 0 8 1 pppxif 1504 4 0 4 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 9 0 1 1 0 1 1 0 482 0 pffrnode 88 9 0 1 1 0 1 1 0 8 0 pffrent 40 10 0 2 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 2 0 2 1 0 1 1 0 8 1 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 61 0 23 1 0 1 1 0 8 0 pfstkey 128 63 0 25 2 0 2 2 0 8 0 pfstate 384 62 0 25 5 0 5 5 0 8 0 pfrule 1344 63 0 57 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 591 0 271 29 5 24 28 0 8 3 art_table 40 593 0 271 5 0 5 5 0 8 0 art_node 32 143 0 75 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 7 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 34 0 24 1 0 1 1 0 8 0 shmpl 112 16 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 3195 0 1688 96 0 96 96 0 8 0 ffsino 296 3195 0 1688 118 0 118 118 0 8 0 nchpl 144 4568 0 2865 64 0 64 64 0 8 0 rtmask 32 8 0 8 3 2 1 1 0 8 1 vnodes 216 3768 0 0 210 0 210 210 0 8 0 namei 1024 15126 0 15126 3 2 1 2 0 8 1 percpumem 16 95 0 46 1 0 1 1 0 8 0 vcpupl 3968 1 0 0 1 0 1 1 0 8 0 vmpool 840 1 0 0 1 0 1 1 0 8 0 kstatmem 264 84 0 58 3 1 2 3 0 8 0 scsiplug 72 6 0 6 3 2 1 1 0 8 1 scxspl 216 24023 0 24023 9 8 1 8 1 8 1 plimitpl 152 188 0 171 1 0 1 1 0 8 0 sigapl 424 1314 0 1267 7 1 6 7 0 8 0 knotepl 120 517 0 0 16 0 16 16 0 8 0 kqueuepl 224 423 0 413 7 5 2 5 0 8 1 pipepl 344 263 0 236 9 6 3 6 0 8 0 fdescpl 528 1296 0 1266 3 0 3 3 0 8 0 filepl 160 8208 0 7987 30 17 13 26 0 8 2 lockfpl 104 407 0 402 1 0 1 1 0 8 0 lockfspl 48 170 0 167 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 55 0 38 1 0 1 1 0 8 0 ucredpl 104 1100 0 1084 1 0 1 1 0 8 0 zombiepl 144 1698 0 1698 1 0 1 1 0 8 1 processpl 1232 1314 0 1267 5 1 4 5 0 8 0 procpl 664 2879 0 2822 7 1 6 7 0 8 0 sosppl 176 13 0 13 3 2 1 1 0 8 1 sockpl 752 2264 0 2231 44 33 11 30 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k 2048 33 0 0 5 0 5 5 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 390 0 0 24 0 24 24 0 8 0 bufpl 280 9072 0 2935 439 0 439 439 0 8 0 anonpl 32 11583 0 0 94 0 94 94 0 246 0 amapchunkpl 152 36886 0 36224 46 10 36 36 0 158 5 amappl16 200 4087 0 3933 35 21 14 26 0 8 3 amappl15 192 16 0 16 1 1 0 1 0 8 0 amappl14 184 15 0 15 1 1 0 1 0 8 0 amappl13 176 454 0 453 1 0 1 1 0 8 0 amappl12 168 1691 0 1650 3 0 3 3 0 8 0 amappl11 160 25 0 25 1 1 0 1 0 8 0 amappl10 152 47 0 33 1 0 1 1 0 8 0 amappl9 144 246 0 246 1 1 0 1 0 8 0 amappl8 136 27 0 25 1 0 1 1 0 8 0 amappl7 128 84 0 83 1 0 1 1 0 8 0 amappl6 120 303 0 290 1 0 1 1 0 8 0 amappl5 112 80 0 69 1 0 1 1 0 8 0 amappl4 104 472 0 442 1 0 1 1 0 8 0 amappl3 96 6408 0 6317 3 0 3 3 0 8 0 amappl2 88 1466 0 1391 2 0 2 2 0 8 0 amappl1 80 14362 0 13772 14 0 14 14 0 8 0 amappl 88 10095 0 9936 5 0 5 5 0 92 0 uvmvnodes 80 137 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 19 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1296 0 1266 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1296 0 1266 1 0 1 1 0 8 0 vmmpekpl 168 13033 0 12990 3 0 3 3 0 8 0 vmmpepl 168 90400 0 88401 116 18 98 107 0 357 2 vmsppl 488 1295 0 1266 6 1 5 5 0 8 0 rwobjpl 80 26727 0 25523 33 4 29 33 0 8 0 pdppl 4096 2602 0 2533 119 44 75 88 0 8 6 pvpl 32 19964 0 0 161 0 161 161 0 265 0 pmappl 256 1296 0 1266 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 311 0 59 8 0 8 8 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(ffffffff83393b89) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833d3a85,ffffffff833ce1cd,84,ffffffff83428514) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(a,21) at rtmap_grow+0x24f rtable_add(9) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(9) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(9,ffff800001485000) at if_createrdomain+0x40 sys/net/if.c:1974 ifioctl(ffff800010fb5b68,8020699f,ffff80002a39c520,ffff8000fffed780) at ifioctl+0x1b40 sys/net/if.c:2323 sys_ioctl(ffff8000fffed780,ffff80002a39c700,ffff80002a39c650) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a39c700) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a39c700) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd4fb6e47170, count: -10 ddb{0}> machine ddbcpu 1