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 *256430 77532 0 0 0x4000000 0 syz-executor 160606 36092 0 0x2 0x1 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8336ea69) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833afa92,ffffffff833a7748,84,ffffffff83401ded) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(17,21) at rtmap_grow+0x24f rtable_add(16) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(16) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(16,ffff8000014a5800) at if_createrdomain+0x40 sys/net/if.c:1978 ifioctl(ffff8000014def18,8020699f,ffff80002a3018a0,ffff80002a3774d8) at ifioctl+0x1c66 sys/net/if.c:2327 sys_ioctl(ffff80002a3774d8,ffff80002a301a80,ffff80002a3019d0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a301a80) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a301a80) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8262afbad30, 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(ffffffff8336ea69) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833afa92,ffffffff833a7748,84,ffffffff83401ded) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(17,21) at rtmap_grow+0x24f rtable_add(16) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(16) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(16,ffff8000014a5800) at if_createrdomain+0x40 sys/net/if.c:1978 ifioctl(ffff8000014def18,8020699f,ffff80002a3018a0,ffff80002a3774d8) at ifioctl+0x1c66 sys/net/if.c:2327 sys_ioctl(ffff80002a3774d8,ffff80002a301a80,ffff80002a3019d0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a301a80) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a301a80) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8262afbad30, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a3015b0 rbx 0xffffffff83846ddf cpu_info_full_primary+0x2ddf rdx 0 rcx 0xffff80002a3774d8 rax 0xffffffff83845ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6e4159228f7f9c42 r11 0x2e45f44f25b4c4de r12 0xffffffff83846be0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff828a25b5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a3015a0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=256430 pid=77532 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a376a78,0xffff80002a377780 process=0xffff80002a2add08 user=0xffff80002a2fc000, vmspace=0xfffffd806367d028 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 77532 28388 38138 0 2 0 syz-executor *77532 256430 38138 0 7 0x4000000 syz-executor 77532 373985 38138 0 2 0x4000000 syz-executor 62406 396065 36092 0 2 0 syz-executor 62406 338403 36092 0 3 0x4000080 fsleep syz-executor 5315 143956 4205 0 2 0 syz-executor 5315 310745 4205 0 2 0x4000000 syz-executor 2014 191079 87629 0 2 0x2 syz-executor 99015 124903 9851 0 2 0x10 syz-executor 99015 299860 9851 0 2 0x4000010 syz-executor 99015 205186 9851 0 3 0x4000090 fsleep syz-executor 15172 403116 87629 0 2 0x3 syz-executor 90519 261758 87629 0 2 0x10000003 syz-executor 14311 108145 1 0 3 0x100083 ttyin getty 36092 160606 87629 0 7 0x3 syz-executor 9851 199757 87629 0 2 0xc82 syz-executor 27846 220354 0 0 3 0x14200 bored sosplice 23998 40218 87629 0 2 0x2 syz-executor 4205 343631 87629 0 2 0x2 syz-executor 38138 65034 87629 0 2 0xc82 syz-executor 87629 49033 83799 0 2 0x2 syz-executor 83799 228073 4148 0 3 0x10008a sigsusp ksh 4148 110946 12855 0 3 0x98 kqread sshd-session 12855 451136 74133 0 3 0x92 kqread sshd-session 74133 478797 1 0 3 0x88 kqread sshd 21282 415063 38481 74 3 0x1100092 bpf pflogd 38481 442613 1 0 3 0x80 sbwait pflogd 63378 511361 54938 73 3 0x1100090 kqread syslogd 54938 511007 1 0 3 0x100082 sbwait syslogd 27829 228821 1 0 3 0x100080 kqread resolvd 16124 305662 94314 77 3 0x100092 kqread dhcpleased 66674 213110 94314 77 3 0x100092 kqread dhcpleased 94314 521574 1 0 3 0x80 kqread dhcpleased 20515 248426 0 0 3 0x14200 bored smr 79165 470024 0 0 2 0x14200 zerothread 30762 59526 0 0 3 0x14200 aiodoned aiodoned 99498 147390 0 0 3 0x14200 syncer update 93481 422803 0 0 3 0x14200 cleaner cleaner 62041 398132 0 0 3 0x14200 reaper reaper 71456 21586 0 0 3 0x14200 pgdaemon pagedaemon 60627 495961 0 0 3 0x14200 bored viomb 80711 2947 0 0 3 0x40014200 acpi0 acpi0 96985 45857 0 0 3 0x40014200 idle1 78643 347047 0 0 3 0x14200 bored softnet1 95617 330211 0 0 3 0x14200 bored softnet0 38876 147333 0 0 3 0x14200 bored systqmp 44513 429156 0 0 3 0x14200 bored systq 41210 66225 0 0 3 0x14200 tmoslp softclockmp 94759 37831 0 0 3 0x40014200 tmoslp softclock 51791 345354 0 0 3 0x40014200 idle0 1 407870 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 77532 (syz-executor) thread 0xffff80002a3774d8 (256430) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff838b06e8) #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:1978 #6 ifioctl+0x1c66 sys/net/if.c:2327 #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:746 #9 Xsyscall+0x128 Process 23998 (syz-executor) thread 0xffff80002a376d10 (40218) exclusive rrwlock inode r = 0 (0xfffffd806b6d76a8) #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+0xa3 sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3113 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806bda7a18) #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+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3098 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10216 11094K 11372K 166960K 12819 0 pcb 20 16K 21K 166960K 408 0 rtable 180 8K 8K 166960K 505 0 pf 32 17K 67485K 166960K 164 0 ifaddr 35 6K 7K 166960K 111 0 ifgroup 51 2K 2K 166960K 202 0 sysctl 4 1K 9K 166960K 12 0 counters 66 36K 37K 166960K 204 0 ioctlops 0 0K 4K 166960K 1730 0 iov 0 0K 32K 166960K 205 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1397 88K 88K 166960K 2363 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 135 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 240K 166960K 1258 0 sigio 0 0K 0K 166960K 16 0 proc 72 115K 180K 166960K 735 0 subproc 65 4K 4K 166960K 110 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 132 0 in_multi 72 5K 7K 166960K 178 0 ether_multi 1 0K 0K 166960K 10 0 mrt 2 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 139 625K 625K 166960K 139 0 exec 0 0K 1K 166960K 663 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 217 175K 186K 166960K 12735 0 UVM aobj 34 3K 4K 166960K 40 0 pinsyscall 40 80K 103K 166960K 2415 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 67 0 NDP 11 0K 2K 166960K 83 0 temp 76 8651K 8780K 166960K 58413 0 kqueue 13 20K 30K 166960K 242 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 120 124 0 120 1 0 1 1 0 8 0 rtentry 176 145 0 74 5 1 4 5 0 8 0 unpcb 144 1102 0 1073 9 7 2 4 0 8 0 syncache 336 7 0 7 3 3 0 1 0 8 0 tcpqe 32 9 0 9 4 4 0 1 0 8 0 tcpcb 736 522 0 513 12 10 2 7 0 8 0 arp 136 16 0 8 1 0 1 1 0 8 0 inpcb 328 1520 0 1504 19 12 7 10 0 8 5 nd6 144 27 0 16 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 12 0 5 1 0 1 1 0 8 0 mppekey 1024 4 0 4 2 1 1 1 0 8 1 ppxss 1192 47 0 47 2 1 1 1 0 8 1 pppxif 1504 2 0 2 2 2 0 1 0 8 0 pffrag 232 11 0 3 1 0 1 1 0 482 0 pffrnode 88 11 0 3 1 0 1 1 0 8 0 pffrent 40 17 0 9 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 pfstitem 24 89 0 25 1 0 1 1 0 8 0 pfstkey 128 89 0 25 3 0 3 3 0 8 0 pfstate 384 89 0 25 7 0 7 7 0 8 0 pfrule 1344 23 0 18 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 667 0 325 29 7 22 28 0 8 0 art_table 40 668 0 325 5 0 5 5 0 8 0 art_node 32 143 0 80 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0 semupl 112 3 0 3 3 3 0 1 0 8 0 semapl 112 131 0 121 1 0 1 1 0 8 0 shmpl 112 37 0 6 1 0 1 1 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3668 0 2152 97 1 96 96 0 8 0 ffsino 296 3668 0 2152 117 0 117 117 0 8 0 nchpl 144 5346 0 3645 64 0 64 64 0 8 0 rtmask 32 8 0 8 4 4 0 1 0 8 0 uvmvnodes 80 4266 0 0 88 0 88 88 0 8 0 vnodes 216 4266 0 0 237 0 237 237 0 8 0 namei 1024 18703 0 18701 3 2 1 2 0 8 0 percpumem 16 117 0 69 1 0 1 1 0 8 0 kstatmem 264 120 0 96 4 2 2 3 0 8 0 scsiplug 72 3 0 3 3 3 0 1 0 8 0 scxspl 216 33672 0 33672 10 9 1 7 1 8 1 plimitpl 152 304 0 286 1 0 1 1 0 8 0 sigapl 424 1518 0 1471 8 1 7 7 0 8 0 knotepl 120 574 0 0 17 0 17 17 0 8 0 kqueuepl 224 688 0 674 18 11 7 7 0 8 6 pipepl 344 272 0 245 7 4 3 7 0 8 0 fdescpl 528 1492 0 1463 3 0 3 3 0 8 0 filepl 160 10152 0 9918 31 16 15 20 0 8 1 lockfpl 104 544 0 541 1 0 1 1 0 8 0 lockfspl 48 236 0 233 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 51 0 34 1 0 1 1 0 8 0 ucredpl 104 1439 0 1423 1 0 1 1 0 8 0 zombiepl 144 1895 0 1893 1 0 1 1 0 8 0 processpl 1232 1518 0 1471 6 1 5 5 0 8 0 procpl 664 3466 0 3413 7 1 6 7 0 8 0 sosppl 168 5 0 5 4 3 1 1 0 8 1 sockpl 752 2777 0 2727 29 19 10 15 0 8 5 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 125 0 0 16 1 15 16 0 8 0 mcl2k 2048 59 0 0 7 0 7 7 0 8 0 mtagpl 96 9 0 0 1 0 1 1 0 8 0 mbufpl 256 294 0 0 18 0 18 18 0 8 0 bufpl 280 15104 0 8961 440 0 440 440 0 8 0 anonpl 32 12609 0 0 102 0 102 102 0 246 0 amapchunkpl 152 42707 0 42291 37 10 27 29 0 158 6 amappl16 200 6064 0 6033 55 44 11 30 0 8 3 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 122 0 110 1 0 1 1 0 8 0 amappl13 176 3 0 3 1 1 0 1 0 8 0 amappl12 168 2201 0 2172 3 1 2 3 0 8 0 amappl11 160 47 0 33 1 0 1 1 0 8 0 amappl10 152 24 0 24 1 1 0 1 0 8 0 amappl9 144 304 0 303 1 0 1 1 0 8 0 amappl8 136 86 0 83 1 0 1 1 0 8 0 amappl7 128 123 0 110 1 0 1 1 0 8 0 amappl6 120 239 0 235 1 0 1 1 0 8 0 amappl5 112 141 0 131 1 0 1 1 0 8 0 amappl4 104 306 0 284 1 0 1 1 0 8 0 amappl3 96 7513 0 7432 4 0 4 4 0 8 0 amappl2 88 1753 0 1677 2 0 2 2 0 8 0 amappl1 80 13534 0 12935 15 0 15 15 0 8 0 amappl 88 11806 0 11662 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 8 0 8 3 3 0 1 0 8 0 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 39 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1493 0 1464 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1493 0 1464 1 0 1 1 0 8 0 vmmpekpl 168 13674 0 13632 3 0 3 3 0 8 0 vmmpepl 168 100939 0 99062 116 13 103 112 0 357 0 vmsppl 488 1492 0 1464 6 1 5 5 0 8 0 rwobjpl 80 33380 0 28169 107 0 107 107 0 8 0 pdppl 4096 2994 0 2928 104 32 72 86 0 8 6 pvpl 32 18961 0 0 153 0 153 153 0 265 0 pmappl 256 1492 0 1464 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 309 0 62 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(ffffffff8336ea69) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833afa92,ffffffff833a7748,84,ffffffff83401ded) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(17,21) at rtmap_grow+0x24f rtable_add(16) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(16) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(16,ffff8000014a5800) at if_createrdomain+0x40 sys/net/if.c:1978 ifioctl(ffff8000014def18,8020699f,ffff80002a3018a0,ffff80002a3774d8) at ifioctl+0x1c66 sys/net/if.c:2327 sys_ioctl(ffff80002a3774d8,ffff80002a301a80,ffff80002a3019d0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80002a301a80) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a301a80) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8262afbad30, count: -10 ddb{0}> machine ddbcpu 1