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 * 289 84549 0 0 0x4000000 0 syz-executor 496369 22574 0 0x2 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8344a9d8) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348ba64,ffffffff83484b89,84,ffffffff834dde37) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(c,21) at rtmap_grow+0x24f rtable_add(b) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(b) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(b,ffff8000015f4000) at if_createrdomain+0x40 sys/net/if.c:2045 ifioctl(ffff800010fdc638,8020699f,ffff80003c513280,ffff80003bfc82b8) at ifioctl+0x1c52 sys/net/if.c:2394 sys_ioctl(ffff80003bfc82b8,ffff80003c513460,ffff80003c5133b0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c513460) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c513460) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x95435241ab0, 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(ffffffff8344a9d8) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348ba64,ffffffff83484b89,84,ffffffff834dde37) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(c,21) at rtmap_grow+0x24f rtable_add(b) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(b) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(b,ffff8000015f4000) at if_createrdomain+0x40 sys/net/if.c:2045 ifioctl(ffff800010fdc638,8020699f,ffff80003c513280,ffff80003bfc82b8) at ifioctl+0x1c52 sys/net/if.c:2394 sys_ioctl(ffff80003bfc82b8,ffff80003c513460,ffff80003c5133b0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c513460) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c513460) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x95435241ab0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003c512f90 rbx 0xffffffff8386ae07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff80003bfc82b8 rax 0xffffffff83869ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x9c3c1b2a2c087bb6 r11 0xadc65cac7dc9764b r12 0xffffffff8386ac08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff8167ba25 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003c512f80 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=289 pid=84549 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=0xffff80003bfc8020,0xffff8000fffef4e8 process=0xffff80003c3d89c0 user=0xffff80003c50e000, vmspace=0xfffffd800f877d78 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 47725 466876 52580 0 2 0 syz-executor 47725 509858 52580 0 2 0x4000000 syz-executor 54556 179641 38558 0 2 0 syz-executor 64032 427281 22574 0 3 0x80 nanoslp syz-executor 64032 418173 22574 0 3 0x4000080 fsleep syz-executor 64032 503383 22574 0 2 0x4000000 syz-executor 84549 465417 18836 0 2 0 syz-executor 84549 155104 18836 0 2 0x4000000 syz-executor *84549 289 18836 0 7 0x4000000 syz-executor 85700 110144 99599 -1 3 0x90 nanoslp syz-executor 85700 306473 99599 -1 3 0x4000090 kqread syz-executor 85700 292189 99599 -1 3 0x4000090 fsleep syz-executor 7922 148895 19879 0 2 0 syz-executor 7922 143336 19879 0 3 0x4000080 fsleep syz-executor 7922 447469 19879 0 3 0x4000080 semwait syz-executor 11921 199723 86164 0 2 0xc82 syz-executor 13055 248977 86164 0 3 0x82 wait syz-executor 99599 231990 86164 0 3 0x82 nanoslp syz-executor 52580 321696 86164 0 3 0x82 nanoslp syz-executor 19879 261540 86164 0 3 0x82 nanoslp syz-executor 22574 496369 86164 0 7 0x2 syz-executor 18836 371509 86164 0 2 0xc82 syz-executor 38558 270078 86164 0 2 0xc82 syz-executor 86164 6188 80970 0 3 0x82 kqread syz-executor 80970 268226 55549 0 3 0x10008a sigsusp ksh 55549 45993 46897 0 3 0x98 kqread sshd-session 46897 95234 74361 0 3 0x92 kqread sshd-session 1032 447098 1 0 3 0x100083 ttyin getty 74361 334614 1 0 3 0x88 kqread sshd 33198 319131 58874 74 3 0x1100092 bpf pflogd 58874 381173 1 0 3 0x80 sbwait pflogd 98662 344325 88084 73 3 0x1100090 kqread syslogd 88084 103211 1 0 3 0x100082 sbwait syslogd 48783 289996 1 0 3 0x100080 kqread resolvd 75941 355544 24966 77 3 0x100092 kqread dhcpleased 23989 480203 24966 77 3 0x100092 kqread dhcpleased 24966 328141 1 0 3 0x80 kqread dhcpleased 81689 338781 0 0 3 0x14200 bored smr 12391 231191 0 0 2 0x14200 zerothread 78187 253186 0 0 3 0x14200 aiodoned aiodoned 99406 389531 0 0 3 0x14200 syncer update 82459 425504 0 0 3 0x14200 cleaner cleaner 9543 448635 0 0 3 0x14200 reaper reaper 96199 222568 0 0 3 0x14200 pgdaemon pagedaemon 71538 27804 0 0 3 0x14200 bored viomb 33653 432074 0 0 3 0x40014200 acpi0 acpi0 4951 384990 0 0 3 0x40014200 idle1 98601 10761 0 0 3 0x14200 bored softnet1 12092 380909 0 0 3 0x14200 bored softnet0 96360 164466 0 0 3 0x14200 bored systqmp 34799 423141 0 0 3 0x14200 bored systq 110 418305 0 0 3 0x14200 tmoslp softclockmp 21538 358069 0 0 3 0x40014200 tmoslp softclock 69217 298927 0 0 3 0x40014200 idle0 1 126811 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 64032 (syz-executor) thread 0xffff80003bfc8a80 (503383) exclusive rwlock vmmaplk r = 0 (0xfffffd800f877308) #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:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 84549 (syz-executor) thread 0xffff80003bfc82b8 (289) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff83a56440) #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:175 #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:2045 #6 ifioctl+0x1c52 sys/net/if.c:2394 #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:783 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11070 12155K 12237K 166960K 12323 0 pcb 18 14K 16K 166960K 151 0 rtable 220 7K 7K 166960K 378 0 pf 37 18K 19K 166960K 63 0 ifaddr 43 7K 7K 166960K 53 0 ifgroup 55 2K 2K 166960K 68 0 sysctl 3 1K 9K 166960K 9 0 counters 72 37K 37K 166960K 84 0 ioctlops 0 0K 4K 166960K 1527 0 iov 0 0K 12K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1293 81K 82K 166960K 1507 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 85K 166960K 353 0 sigio 0 0K 0K 166960K 5 0 proc 74 115K 164K 166960K 581 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 32 0 in_multi 88 6K 7K 166960K 114 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 405 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 244 167K 184K 166960K 5144 0 UVM aobj 9 2K 4K 166960K 10 0 pinsyscall 43 86K 101K 166960K 1510 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 16 0 NDP 13 0K 2K 166960K 34 0 temp 42 9071K 9167K 166960K 14080 0 kqueue 14 20K 28K 166960K 66 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 47 0 44 1 0 1 1 0 8 0 rtentry 176 116 0 18 6 0 6 6 0 8 0 unpcb 144 139 0 118 3 1 2 2 0 8 1 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpcb 736 72 0 61 1 0 1 1 0 8 0 arp 136 19 0 3 1 0 1 1 0 8 0 inpcb 328 343 0 327 8 1 7 7 0 8 5 nd6 152 25 0 4 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 6 0 4 2 1 1 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 69 0 66 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 36 0 1 1 0 1 1 0 8 0 pfstkey 128 36 0 1 2 0 2 2 0 8 0 pfstate 448 35 0 1 4 0 4 4 0 8 0 pfrule 1360 24 0 19 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 256 485 0 77 31 2 29 31 0 8 1 art_table 40 486 0 77 5 0 5 5 0 8 0 art_node 32 116 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 2 1 1 1 0 8 1 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 7 0 2 1 0 1 1 0 8 0 shmpl 112 7 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1995 0 529 93 0 93 93 0 8 0 ffsino 296 1995 0 529 114 0 114 114 0 8 0 nchpl 144 2490 0 788 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 vnodes 216 2143 0 0 120 0 120 120 0 8 0 namei 1024 7735 0 7735 1 0 1 1 0 8 1 percpumem 16 57 0 6 1 0 1 1 0 8 0 kstatmem 264 36 0 8 3 0 3 3 0 8 1 scxspl 216 10148 0 10148 11 10 1 8 1 8 1 plimitpl 152 64 0 46 1 0 1 1 0 8 0 sigapl 424 670 0 622 7 1 6 7 0 8 0 knotepl 120 306 0 0 10 0 10 10 0 8 0 kqueuepl 224 84 0 74 2 1 1 2 0 8 0 pipepl 344 236 0 176 6 0 6 6 0 8 0 fdescpl 528 654 0 622 3 0 3 3 0 8 0 filepl 160 3217 0 2922 14 0 14 14 0 8 1 lockfpl 104 84 0 79 1 0 1 1 0 8 0 lockfspl 48 40 0 36 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 370 0 355 1 0 1 1 0 8 0 zombiepl 144 689 0 687 1 0 1 1 0 8 0 processpl 1232 670 0 622 5 0 5 5 0 8 0 procpl 664 1092 0 1035 6 0 6 6 0 8 0 sockpl 752 549 0 509 12 1 11 11 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 139 0 0 18 0 18 18 0 8 0 mcl2k 2048 41 0 0 6 0 6 6 0 8 1 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 198 0 0 13 0 13 13 0 8 0 bufpl 280 3559 0 105 247 0 247 247 0 8 0 anonpl 32 5653 0 0 47 1 46 46 0 246 0 amapchunkpl 152 15728 0 15213 34 5 29 29 0 158 7 amappl16 200 925 0 896 7 3 4 6 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 438 0 437 1 0 1 1 0 8 0 amappl13 176 120 0 108 1 0 1 1 0 8 0 amappl12 168 905 0 874 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 69 0 55 1 0 1 1 0 8 0 amappl9 144 270 0 270 1 1 0 1 0 8 0 amappl8 136 106 0 103 1 0 1 1 0 8 0 amappl7 128 148 0 135 1 0 1 1 0 8 0 amappl6 120 152 0 151 1 0 1 1 0 8 0 amappl5 112 92 0 82 1 0 1 1 0 8 0 amappl4 104 287 0 267 1 0 1 1 0 8 0 amappl3 96 2954 0 2836 4 0 4 4 0 8 0 amappl2 88 533 0 474 2 0 2 2 0 8 0 amappl1 80 10588 0 9983 17 1 16 16 0 8 2 amappl 88 4365 0 4193 5 0 5 5 0 92 0 uvmvnodes 80 106 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 128 253 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 9 0 1 1 0 1 1 0 8 0 uaddrrnd 24 654 0 622 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 654 0 622 1 0 1 1 0 8 0 vmmpekpl 168 7571 0 7533 2 0 2 2 0 8 0 vmmpepl 168 48079 0 46123 103 5 98 98 0 357 8 vmsppl 488 653 0 622 6 1 5 5 0 8 1 rwobjpl 80 15443 0 14398 27 1 26 26 0 8 3 pdppl 4096 1315 0 1244 101 30 71 81 0 8 0 pvpl 32 13192 0 0 108 1 107 107 0 265 0 pmappl 256 653 0 622 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 284 0 36 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(ffffffff8344a9d8) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8348ba64,ffffffff83484b89,84,ffffffff834dde37) at __assert+0x29 sys/kern/subr_prf.c:-1 rtmap_grow(c,21) at rtmap_grow+0x24f rtable_add(b) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:370 [inline] rtable_add(b) at rtable_add+0x2d9 sys/net/rtable.c:223 if_createrdomain(b,ffff8000015f4000) at if_createrdomain+0x40 sys/net/if.c:2045 ifioctl(ffff800010fdc638,8020699f,ffff80003c513280,ffff80003bfc82b8) at ifioctl+0x1c52 sys/net/if.c:2394 sys_ioctl(ffff80003bfc82b8,ffff80003c513460,ffff80003c5133b0) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1 syscall(ffff80003c513460) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c513460) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x95435241ab0, count: -10 ddb{0}> machine ddbcpu 1