login: 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 *330589 21327 0 0 0x4000000 0 syz-executor 156823 23401 0 0x14000 0x200 1 softclockmp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e776c) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309cc35,ffffffff82fe018e,83,ffffffff830e0089) at __assert+0x29 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,ffff80000159c800) at if_createrdomain+0x40 sys/net/if.c:1947 ifioctl(ffff800010fdd9f8,8020699f,ffff800033998860,ffff8000ffffc298) at ifioctl+0x1a1e sys/net/if.c:2296 sys_ioctl(ffff8000ffffc298,ffff800033998a40,ffff800033998990) at sys_ioctl+0x67c syscall(ffff800033998a40) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800033998a40) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6d231e8f6c0, 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:437 panic(ffffffff830e776c) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309cc35,ffffffff82fe018e,83,ffffffff830e0089) at __assert+0x29 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,ffff80000159c800) at if_createrdomain+0x40 sys/net/if.c:1947 ifioctl(ffff800010fdd9f8,8020699f,ffff800033998860,ffff8000ffffc298) at ifioctl+0x1a1e sys/net/if.c:2296 sys_ioctl(ffff8000ffffc298,ffff800033998a40,ffff800033998990) at sys_ioctl+0x67c syscall(ffff800033998a40) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800033998a40) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6d231e8f6c0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800033998580 rbx 0xffffffff834d9dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff8000ffffc298 rax 0xffffffff834d8ff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0x8080808080808080 r10 0xf63482b715070c62 r11 0x63567e11feed35d5 r12 0xffffffff834d9bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff8265f8c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800033998570 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=330589 pid=21327 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=0xffff8000ffffc520,0xffff8000ffff3c08 process=0xffff8000ffff5238 user=0xffff800033993000, vmspace=0xfffffd806b1dbdc0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 21327 40982 82587 0 2 0 syz-executor *21327 330589 82587 0 7 0x4000000 syz-executor 21327 248617 82587 0 2 0x4000000 syz-executor 51085 5695 33219 0 2 0 syz-executor 51085 436522 33219 0 3 0x4000080 fsleep syz-executor 75044 70753 22909 0 2 0 syz-executor 75044 134033 22909 0 3 0x4000080 fsleep syz-executor 86138 449431 81960 0 2 0 syz-executor 86138 482477 81960 0 3 0x4000080 ttyin syz-executor 86138 403851 81960 0 3 0x4000000 inode syz-executor 86138 409577 81960 0 3 0x4000080 fsleep syz-executor 26100 146228 92107 0 3 0x80 nanoslp syz-executor 26100 406162 92107 0 3 0x4000080 kqread syz-executor 26100 210865 92107 0 3 0x4000080 fsleep syz-executor 22909 459546 23704 0 2 0x482 syz-executor 77481 421888 0 0 3 0x14200 acct acct 89086 362059 0 0 3 0x14200 bored sosplice 60712 390673 1 0 3 0x100083 ttyin getty 98412 138110 23704 0 2 0x3 syz-executor 83162 515777 23704 0 3 0x82 wait syz-executor 33219 354805 23704 0 2 0x482 syz-executor 81960 513545 23704 0 2 0x482 syz-executor 92107 457271 23704 0 3 0x82 nanoslp syz-executor 82587 424598 23704 0 3 0x82 nanoslp syz-executor 70946 252561 23704 0 3 0x82 wait syz-executor 23704 459486 65701 0 3 0x82 kqread syz-executor 65701 217479 75816 0 3 0x10008a sigsusp ksh 75816 248223 99361 0 3 0x98 kqread sshd-session 99361 167182 17961 0 3 0x92 kqread sshd-session 17961 225245 1 0 3 0x88 kqread sshd 1644 204011 88287 74 3 0x1100092 bpf pflogd 88287 5342 1 0 3 0x80 sbwait pflogd 42018 185015 38714 73 3 0x1100090 kqread syslogd 38714 26830 1 0 3 0x100082 sbwait syslogd 69589 432630 1 0 3 0x100080 kqread resolvd 82659 114059 65157 77 3 0x100092 kqread dhcpleased 34416 144862 65157 77 3 0x100092 kqread dhcpleased 65157 278406 1 0 3 0x80 kqread dhcpleased 36196 404740 0 0 3 0x14200 bored smr 50511 200314 0 0 2 0x14200 zerothread 96688 171595 0 0 3 0x14200 aiodoned aiodoned 71363 28411 0 0 3 0x14200 syncer update 57912 437222 0 0 3 0x14200 cleaner cleaner 63589 324984 0 0 3 0x14200 reaper reaper 32173 300115 0 0 3 0x14200 pgdaemon pagedaemon 69237 25809 0 0 3 0x14200 bored viomb 64677 136406 0 0 3 0x40014200 acpi0 acpi0 27920 154041 0 0 3 0x40014200 idle1 79325 123299 0 0 3 0x14200 bored softnet3 78232 426871 0 0 3 0x14200 bored softnet2 97203 464925 0 0 3 0x14200 bored softnet1 76858 372806 0 0 3 0x14200 bored softnet0 43554 293806 0 0 3 0x14200 bored systqmp 71911 7535 0 0 3 0x14200 bored systq 23401 156823 0 0 7 0x14200 softclockmp 28450 52254 0 0 2 0x40014200 softclock 95296 450966 0 0 3 0x40014200 idle0 1 121976 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 21327 (syz-executor) thread 0xffff8000ffffc298 (330589) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff83618498) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 yield+0x6a sys/kern/sched_bsd.c:320 #4 malloc+0xe5 sys/kern/kern_malloc.c:170 #5 rtmap_grow+0xb2 sys/net/rtable.c:126 #6 rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:373 [inline] #6 rtable_add+0x2d9 sys/net/rtable.c:222 #7 if_createrdomain+0x40 sys/net/if.c:1947 #8 ifioctl+0x1a1e sys/net/if.c:2296 #9 sys_ioctl+0x67c #10 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #10 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #11 Xsyscall+0x128 Process 86138 (syz-executor) thread 0xffff8000ffffd960 (482477) exclusive rrwlock inode r = 0 (0xfffffd806daf5a38) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 spec_open+0x302 sys/kern/spec_vnops.c:151 #6 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 #7 vn_open+0x708 sys/kern/vfs_vnops.c:177 #8 vndioctl+0xcb1 sys/dev/vnd.c:457 #9 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #10 vn_ioctl+0xf6 sys/kern/vfs_vnops.c:525 #11 sys_ioctl+0x67c #12 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #12 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 Process 86138 (syz-executor) thread 0xffff8000ffff2f50 (403851) exclusive rrwlock inode r = 0 (0xfffffd806446f3d8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 vn_open+0x13f sys/kern/vfs_vnops.c:140 #8 vndioctl+0xcb1 sys/dev/vnd.c:457 #9 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #10 vn_ioctl+0xf6 sys/kern/vfs_vnops.c:525 #11 sys_ioctl+0x67c #12 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #12 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 14328K 14451K 166960K 11832 0 pcb 18 13K 14K 166960K 111 0 rtable 226 7K 7K 166960K 429 0 pf 35 17K 18K 166960K 54 0 ifaddr 43 7K 7K 166960K 51 0 ifgroup 55 2K 2K 166960K 64 0 sysctl 3 1K 1K 166960K 3 0 counters 64 36K 36K 166960K 68 0 ioctlops 0 0K 4K 166960K 1498 0 iov 0 0K 12K 166960K 23 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1396 88K 88K 166960K 1661 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 3K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 13 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 93K 166960K 449 0 sigio 0 0K 0K 166960K 9 0 proc 72 91K 115K 166960K 609 0 subproc 104 6K 6K 166960K 117 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 53 0 in_multi 99 7K 7K 166960K 129 0 ether_multi 1 0K 0K 166960K 3 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 480 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 249 73K 74K 166960K 5866 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 42 84K 104K 166960K 1548 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 23 0 NDP 12 0K 2K 166960K 32 0 temp 49 6817K 6883K 166960K 19443 0 kqueue 16 22K 30K 166960K 71 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 55 0 52 1 0 1 1 0 8 0 rtentry 112 133 0 30 4 0 4 4 0 8 0 unpcb 144 313 0 294 4 0 4 4 0 8 3 syncache 336 3 0 3 2 2 0 1 0 8 0 tcpcb 808 263 0 258 14 7 7 8 0 8 6 arp 120 22 0 4 1 0 1 1 0 8 0 inpcb 336 709 0 698 18 11 7 13 0 8 4 nd6 136 31 0 4 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1168 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 1 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 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 49 0 3 1 0 1 1 0 8 0 pfstkey 128 49 0 3 2 0 2 2 0 8 0 pfstate 376 49 0 3 5 0 5 5 0 8 0 pfrule 1344 24 0 16 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 537 0 91 30 1 29 29 0 8 1 art_table 32 539 0 91 4 0 4 4 0 8 0 art_node 16 132 0 40 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 7 1 0 1 1 0 8 0 semapl 112 10 0 1 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2150 0 639 95 0 95 95 0 8 0 ffsino 272 2150 0 639 102 0 102 102 0 8 0 nchpl 144 2794 0 1100 63 0 63 63 0 8 0 uvmvnodes 80 2394 0 0 49 0 49 49 0 8 0 vnodes 216 2394 0 0 133 0 133 133 0 8 0 namei 1024 9366 0 9365 4 3 1 2 0 8 0 percpumem 16 48 0 2 1 0 1 1 0 8 0 kstatmem 264 28 0 4 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 1 1 1 0 8 1 scxspl 216 9978 0 9978 10 2 8 8 1 8 8 plimitpl 152 96 0 78 1 0 1 1 0 8 0 sigapl 424 748 0 696 7 1 6 7 0 8 0 futexpl 64 4760 0 4756 1 0 1 1 0 8 0 knotepl 120 491 0 0 15 0 15 15 0 8 0 kqueuepl 216 167 0 154 5 1 4 5 0 8 3 pipepl 320 140 0 112 3 0 3 3 0 8 0 fdescpl 496 728 0 697 5 0 5 5 0 8 0 filepl 152 4200 0 3944 20 4 16 18 0 8 4 lockfpl 104 93 0 91 1 0 1 1 0 8 0 lockfspl 48 40 0 38 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 661 0 646 1 0 1 1 0 8 0 zombiepl 144 833 0 830 2 1 1 1 0 8 0 processpl 1160 748 0 696 5 1 4 5 0 8 0 procpl 648 1288 0 1227 6 0 6 6 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sockpl 664 1086 0 1054 20 10 10 15 0 8 7 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 254 0 0 32 0 32 32 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 265 0 0 17 0 17 17 0 8 0 bufpl 280 4831 0 98 339 0 339 339 0 8 0 anonpl 24 215005 0 207327 90 18 72 72 0 185 2 amapchunkpl 152 19606 0 19052 31 4 27 27 0 158 2 amappl16 200 6311 0 6041 39 12 27 27 0 8 2 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 125 0 113 1 0 1 1 0 8 0 amappl13 176 9 0 9 2 1 1 1 0 8 1 amappl12 168 1399 0 1368 5 2 3 3 0 8 0 amappl11 160 59 0 45 1 0 1 1 0 8 0 amappl10 152 12 0 12 1 1 0 1 0 8 0 amappl9 144 145 0 145 1 1 0 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 115 0 103 1 0 1 1 0 8 0 amappl6 120 180 0 179 1 0 1 1 0 8 0 amappl5 112 142 0 129 1 0 1 1 0 8 0 amappl4 104 305 0 284 1 0 1 1 0 8 0 amappl3 96 3827 0 3708 4 0 4 4 0 8 0 amappl2 88 683 0 616 2 0 2 2 0 8 0 amappl1 80 8506 0 7936 15 2 13 14 0 8 1 amappl 88 5466 0 5279 6 1 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 128 253 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 24 728 0 697 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 728 0 697 1 0 1 1 0 8 0 vmmpekpl 168 7019 0 6974 3 0 3 3 0 8 0 vmmpepl 168 54546 0 52415 113 7 106 106 0 357 2 vmsppl 440 727 0 697 6 2 4 5 0 8 0 rwobjpl 56 22733 0 19137 53 2 51 51 0 8 0 pdppl 4096 1463 0 1394 105 32 73 85 0 8 4 pvpl 32 19701 0 0 160 1 159 159 0 265 0 pmappl 248 727 0 697 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 432 0 58 11 0 11 11 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:437 panic(ffffffff830e776c) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309cc35,ffffffff82fe018e,83,ffffffff830e0089) at __assert+0x29 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,ffff80000159c800) at if_createrdomain+0x40 sys/net/if.c:1947 ifioctl(ffff800010fdd9f8,8020699f,ffff800033998860,ffff8000ffffc298) at ifioctl+0x1a1e sys/net/if.c:2296 sys_ioctl(ffff8000ffffc298,ffff800033998a40,ffff800033998990) at sys_ioctl+0x67c syscall(ffff800033998a40) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800033998a40) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6d231e8f6c0, count: -10 ddb{0}> machine ddbcpu 1