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 *256721 99586 0 0 0x4000000 0K syz-executor 55343 68261 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8343b3e6) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e8801,ffffffff833114d5,83,ffffffff83431915) 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,ffff800000b2c000) at if_createrdomain+0x40 sys/net/if.c:1946 ifioctl(ffff800001442d80,8020699f,ffff80003acd0490,ffff8000ffff82b8) at ifioctl+0x1a1e sys/net/if.c:2295 sys_ioctl(ffff8000ffff82b8,ffff80003acd0670,ffff80003acd05c0) at sys_ioctl+0x5c3 syscall(ffff80003acd0670) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003acd0670) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5fe14e18bb0, 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(ffffffff8343b3e6) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e8801,ffffffff833114d5,83,ffffffff83431915) 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,ffff800000b2c000) at if_createrdomain+0x40 sys/net/if.c:1946 ifioctl(ffff800001442d80,8020699f,ffff80003acd0490,ffff8000ffff82b8) at ifioctl+0x1a1e sys/net/if.c:2295 sys_ioctl(ffff8000ffff82b8,ffff80003acd0670,ffff80003acd05c0) at sys_ioctl+0x5c3 syscall(ffff80003acd0670) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003acd0670) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5fe14e18bb0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003acd01b0 rbx 0xffffffff83800dc7 cpu_info_full_primary+0x2dc7 rdx 0 rcx 0xffff8000ffff82b8 rax 0xffffffff837ffff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0x8080808080808080 r10 0x63b85573a098d31a r11 0x1306bc24b8d1a52f r12 0xffffffff83800bc8 cpu_info_full_primary+0x2bc8 r13 0 r14 0 r15 0x1 rip 0xffffffff8104b6f5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003acd01a0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=256721 pid=99586 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff8548,0xffff8000ffff8a78 process=0xffff80002f0a9018 user=0xffff80003accb000, vmspace=0xfffffd806bc74028 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 26746 312452 53002 0 2 0 syz-executor 26746 286871 53002 0 3 0x4000080 fsleep syz-executor 67907 50604 31481 0 2 0x10 syz-executor 67907 45951 31481 0 3 0x4000090 fsleep syz-executor 67907 26341 31481 0 2 0x4000010 syz-executor 99586 9617 91169 0 2 0 syz-executor 99586 329951 91169 0 2 0x4000000 syz-executor *99586 256721 91169 0 7 0x4000000 syz-executor 21974 331978 74441 0 2 0 syz-executor 21974 324444 74441 0 3 0x4000080 fsleep syz-executor 32321 50060 8161 0 2 0 syz-executor 32321 156587 8161 0 2 0x4000000 syz-executor 42708 178225 68752 0 3 0x82 wait syz-executor 67969 412779 0 0 3 0x14200 acct acct 30723 491843 68752 0 2 0x2 syz-executor 53002 28787 68752 0 3 0x82 nanoslp syz-executor 10250 143591 0 0 3 0x14200 bored sosplice 83678 1279 1 0 3 0x100083 ttyin getty 91169 57014 68752 0 3 0x82 nanoslp syz-executor 31481 59230 68752 0 2 0x482 syz-executor 8161 82998 68752 0 3 0x82 nanoslp syz-executor 19805 223682 68752 0 2 0x482 syz-executor 74441 433988 68752 0 2 0x482 syz-executor 68752 141795 2146 0 3 0x82 kqread syz-executor 2146 366154 27189 0 3 0x10008a sigsusp ksh 27189 188449 26094 0 3 0x98 kqread sshd-session 26094 22513 87069 0 3 0x92 kqread sshd-session 87069 117313 1 0 3 0x88 kqread sshd 69605 380519 54380 74 3 0x1100092 bpf pflogd 54380 38566 1 0 3 0x80 sbwait pflogd 38512 460614 71251 73 3 0x1100090 kqread syslogd 71251 380795 1 0 3 0x100082 sbwait syslogd 54743 215925 1 0 3 0x100080 kqread resolvd 20654 456941 91253 77 3 0x100092 kqread dhcpleased 94553 218333 91253 77 3 0x100092 kqread dhcpleased 91253 31220 1 0 3 0x80 kqread dhcpleased 68243 26406 0 0 3 0x14200 bored smr 75586 154101 0 0 2 0x14200 zerothread 54662 184298 0 0 3 0x14200 aiodoned aiodoned 69101 152379 0 0 3 0x14200 syncer update 88748 20106 0 0 3 0x14200 cleaner cleaner 68261 55343 0 0 7 0x14200 reaper 24756 47565 0 0 3 0x14200 pgdaemon pagedaemon 57834 184503 0 0 3 0x14200 bored viomb 95633 53775 0 0 3 0x40014200 acpi0 acpi0 66000 178018 0 0 3 0x40014200 idle1 18074 270100 0 0 3 0x14200 bored softnet3 24153 417994 0 0 3 0x14200 bored softnet2 73077 250218 0 0 3 0x14200 bored softnet1 35424 357980 0 0 3 0x14200 bored softnet0 60849 428165 0 0 3 0x14200 bored systqmp 31821 217625 0 0 3 0x14200 bored systq 62148 353748 0 0 3 0x14200 tmoslp softclockmp 15085 113103 0 0 2 0x40014200 softclock 74473 38400 0 0 3 0x40014200 idle0 1 35709 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &uvm.pageqlock r = 0 (0xffffffff839444a0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 uvm_anfree_list+0xeb sys/uvm/uvm_anon.c:104 #4 amap_wipeout+0x248 sys/uvm/uvm_amap.c:502 #5 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #6 uvm_map_teardown+0x354 sys/uvm/uvm_map.c:2516 #7 uvmspace_free+0xcd sys/uvm/uvm_map.c:3420 #8 reaper+0x246 sys/kern/kern_exit.c:477 #9 proc_trampoline+0x10 Process 67907 (syz-executor) thread 0xffff8000ffffb200 (26341) Process 99586 (syz-executor) thread 0xffff8000ffff82b8 (256721) Process 32321 (syz-executor) thread 0xffff8000ffff9738 (156587) Process 30723 (syz-executor) thread 0xffff80002a39cf78 (491843) Process 68261 (reaper) thread 0xffff8000ffffca48 (55343) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10201 11031K 11355K 166960K 12616 0 pcb 17 14K 15K 166960K 139 0 rtable 183 9K 10K 166960K 567 0 pf 36 18K 23K 166960K 153 0 ifaddr 33 5K 8K 166960K 85 0 ifgroup 51 2K 2K 166960K 135 0 sysctl 4 1K 1K 166960K 4 0 counters 62 36K 36K 166960K 126 0 ioctlops 0 0K 4K 166960K 1683 0 iov 0 0K 24K 166960K 111 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1460 92K 92K 166960K 2492 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 13K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 39 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 97K 166960K 959 0 sigio 0 0K 0K 166960K 22 0 proc 73 91K 140K 166960K 708 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 403 0 in_multi 66 4K 7K 166960K 156 0 ether_multi 1 0K 0K 166960K 5 0 mrt 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 753 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 214 72K 77K 166960K 10557 0 UVM aobj 33 2K 2K 166960K 42 0 pinsyscall 40 80K 106K 166960K 2107 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 41 0 NDP 11 0K 1K 166960K 57 0 temp 79 8644K 8752K 166960K 41111 0 kqueue 13 20K 30K 166960K 165 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 98 0 94 1 0 1 1 0 8 0 rtentry 112 158 0 87 4 0 4 4 0 8 0 unpcb 144 773 0 755 7 6 1 6 0 8 0 syncache 336 5 0 5 2 2 0 1 0 8 0 tcpcb 808 414 0 410 18 12 6 7 0 8 5 arp 120 26 0 14 1 0 1 1 0 8 0 inpcb 376 1383 0 1375 26 17 9 12 0 8 8 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 136 34 0 17 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1168 19 0 19 3 2 1 1 0 8 1 pppxif 1472 2 0 2 2 2 0 1 0 8 0 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 11 0 8 2 1 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 9 0 7 1 0 1 1 0 8 0 pfanchor 1288 3 0 1 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 2 0 0 1 0 1 1 0 8 0 pfstitem 24 79 0 22 1 0 1 1 0 8 0 pfstkey 128 95 0 39 2 0 2 2 0 8 0 pfstate 376 85 0 29 6 0 6 6 0 8 0 pfrule 1344 37 0 27 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 674 0 351 31 2 29 30 0 8 4 art_table 32 676 0 351 4 0 4 4 0 8 0 art_node 16 155 0 94 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semapl 112 37 0 27 1 0 1 1 0 8 0 shmpl 112 39 0 9 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 3175 0 1667 95 0 95 95 0 8 0 ffsino 280 3175 0 1667 109 0 109 109 0 8 0 nchpl 144 4540 0 2846 65 1 64 64 0 8 0 rtmask 32 2 0 2 2 2 0 1 0 8 0 uvmvnodes 80 4005 0 0 82 0 82 82 0 8 0 vnodes 216 4005 0 0 223 0 223 223 0 8 0 namei 1024 15776 0 15775 2 1 1 2 0 8 0 percpumem 16 77 0 32 1 0 1 1 0 8 0 pfiaddrpl 120 3 0 2 1 0 1 1 0 8 0 kstatmem 264 72 0 50 2 0 2 2 0 8 0 scsiplug 72 8 0 8 5 4 1 1 0 8 1 scxspl 216 14069 0 14069 11 9 2 8 1 8 2 plimitpl 152 158 0 141 1 0 1 1 0 8 0 sigapl 424 1257 0 1206 7 1 6 7 0 8 0 futexpl 64 12882 0 12879 1 0 1 1 0 8 0 knotepl 120 364 0 0 11 0 11 11 0 8 0 kqueuepl 216 368 0 358 5 4 1 5 0 8 0 pipepl 328 206 0 179 3 0 3 3 0 8 0 fdescpl 504 1236 0 1207 6 1 5 6 0 8 0 filepl 152 8462 0 8249 24 10 14 18 0 8 3 lockfpl 104 286 0 284 1 0 1 1 0 8 0 lockfspl 48 128 0 126 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 117 0 100 1 0 1 1 0 8 0 ucredpl 104 1629 0 1614 1 0 1 1 0 8 0 zombiepl 144 1404 0 1402 3 2 1 1 0 8 0 processpl 1168 1257 0 1206 5 1 4 5 0 8 0 procpl 656 2668 0 2610 8 2 6 7 0 8 0 srpgc 96 10 0 10 3 2 1 1 0 8 1 sosppl 168 4 0 4 2 1 1 1 0 8 1 sockpl 688 2268 0 2238 34 23 11 16 0 8 8 mcl64k 65536 2 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 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 116 0 0 15 0 15 15 0 8 0 mcl2k 2048 41 0 0 6 0 6 6 0 8 0 mtagpl 96 26 0 0 1 0 1 1 0 8 0 mbufpl 256 235 0 0 15 0 15 15 0 8 0 bufpl 280 4175 0 131 289 0 289 289 0 8 0 anonpl 24 184346 0 181086 72 26 46 46 0 184 12 amapchunkpl 152 33461 0 33003 37 11 26 26 0 158 5 amappl16 200 3675 0 3643 34 20 14 15 0 8 10 amappl15 192 6 0 6 2 1 1 1 0 8 1 amappl14 184 118 0 106 1 0 1 1 0 8 0 amappl13 176 6 0 6 1 1 0 1 0 8 0 amappl12 168 1919 0 1889 4 1 3 3 0 8 0 amappl11 160 121 0 106 1 0 1 1 0 8 0 amappl10 152 6 0 6 2 2 0 1 0 8 0 amappl9 144 270 0 270 2 2 0 1 0 8 0 amappl8 136 24 0 22 1 0 1 1 0 8 0 amappl7 128 113 0 101 1 0 1 1 0 8 0 amappl6 120 210 0 207 1 0 1 1 0 8 0 amappl5 112 133 0 124 1 0 1 1 0 8 0 amappl4 104 331 0 312 1 0 1 1 0 8 0 amappl3 96 6716 0 6608 4 0 4 4 0 8 0 amappl2 88 685 0 623 2 0 2 2 0 8 0 amappl1 80 10794 0 10227 15 1 14 14 0 8 0 amappl 88 10096 0 9937 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 41 0 9 1 0 1 1 0 8 0 uaddrrnd 24 1236 0 1206 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1236 0 1206 1 0 1 1 0 8 0 vmmpekpl 168 11704 0 11661 4 1 3 3 0 8 0 vmmpepl 168 81146 0 79342 102 7 95 95 0 357 10 vmsppl 456 1235 0 1206 6 1 5 5 0 8 0 rwobjpl 64 27483 0 22526 83 0 83 83 0 8 0 pdppl 4096 2480 0 2412 116 44 72 88 0 8 4 pvpl 32 14718 0 0 120 1 119 119 0 265 0 pmappl 248 1235 0 1206 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 325 0 67 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(ffffffff8343b3e6) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff833e8801,ffffffff833114d5,83,ffffffff83431915) 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,ffff800000b2c000) at if_createrdomain+0x40 sys/net/if.c:1946 ifioctl(ffff800001442d80,8020699f,ffff80003acd0490,ffff8000ffff82b8) at ifioctl+0x1a1e sys/net/if.c:2295 sys_ioctl(ffff8000ffff82b8,ffff80003acd0670,ffff80003acd05c0) at sys_ioctl+0x5c3 syscall(ffff80003acd0670) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003acd0670) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5fe14e18bb0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029aabff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff8398e790) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8398e790) at __mp_lock+0x192 sys/kern/kern_lock.c:144 reaper(ffff8000ffffca48) at reaper+0x24b sys/kern/kern_exit.c:478 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800029aabff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff8398e790) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8398e790) at __mp_lock+0x192 sys/kern/kern_lock.c:144 reaper(ffff8000ffffca48) at reaper+0x24b sys/kern/kern_exit.c:478 end trace frame: 0x0, count: -5