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 *343301 46811 0 0 0x4000000 0 syz-executor 220611 81358 0 0x2 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8346de67) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83415b5a,ffffffff8333ffab,83,ffffffff834600af) at __assert+0x29 sys/kern/subr_prf.c:-1 rtable_init() at rtable_init rtable_add(2) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:373 [inline] rtable_add(2) at rtable_add+0x2d9 sys/net/rtable.c:222 if_createrdomain(2,ffff800001495000) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff800010fdd9a8,8020699f,ffff800039bf0330,ffff80002a297c50) at ifioctl+0x1a1e sys/net/if.c:2315 sys_ioctl(ffff80002a297c50,ffff800039bf0510,ffff800039bf0460) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff800039bf0510) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039bf0510) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4c5054b43d0, 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(ffffffff8346de67) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83415b5a,ffffffff8333ffab,83,ffffffff834600af) at __assert+0x29 sys/kern/subr_prf.c:-1 rtable_init() at rtable_init rtable_add(2) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:373 [inline] rtable_add(2) at rtable_add+0x2d9 sys/net/rtable.c:222 if_createrdomain(2,ffff800001495000) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff800010fdd9a8,8020699f,ffff800039bf0330,ffff80002a297c50) at ifioctl+0x1a1e sys/net/if.c:2315 sys_ioctl(ffff80002a297c50,ffff800039bf0510,ffff800039bf0460) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff800039bf0510) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039bf0510) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4c5054b43d0, count: -10 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800039bf0050 rbx 0xffffffff8384fdd7 cpu_info_full_primary+0x2dd7 rdx 0 rcx 0xffff80002a297c50 rax 0xffffffff8384eff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0x8080808080808080 r10 0xd70bc8874d5f0050 r11 0x965ac0da7d439b59 r12 0xffffffff8384fbd8 cpu_info_full_primary+0x2bd8 r13 0 r14 0 r15 0x1 rip 0xffffffff816f4015 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800039bf0040 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=343301 pid=46811 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=0xffff80002a297730,0xffffffff839656b8 process=0xffff80003c411d30 user=0xffff800039beb000, vmspace=0xfffffd806b554200 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 46811 23329 12209 0 2 0 syz-executor 46811 427422 12209 0 2 0x4000000 syz-executor *46811 343301 12209 0 7 0x4000000 syz-executor 22517 482869 33482 0 2 0 syz-executor 22517 469616 33482 0 3 0x4000080 fsleep syz-executor 22517 181337 33482 0 3 0x4000080 fsleep syz-executor 77623 312352 81358 0 2 0 syz-executor 77623 347707 81358 0 2 0x4000000 syz-executor 41040 39536 11507 0 2 0 syz-executor 41040 27559 11507 0 3 0x4000080 fsleep syz-executor 63618 54467 65661 0 2 0x10 syz-executor 63618 330820 65661 0 3 0x4000090 fsleep syz-executor 63618 173240 65661 0 2 0x4000010 syz-executor 63618 288351 65661 0 3 0x4000090 fsleep syz-executor 26285 214812 0 0 3 0x14200 bored sosplice 65661 412061 14279 0 2 0xc82 syz-executor 62891 201442 14279 0 2 0x2 syz-executor 33482 422759 14279 0 3 0x82 nanoslp syz-executor 95744 492998 14279 0 2 0xc82 syz-executor 12209 236889 14279 0 3 0x82 nanoslp syz-executor 11507 354910 14279 0 3 0x82 nanoslp syz-executor 91991 291120 14279 0 2 0x2 syz-executor 81358 220611 14279 0 7 0x2 syz-executor 14279 69307 6017 0 3 0x82 kqread syz-executor 6017 164679 55113 0 3 0x10008a sigsusp ksh 55113 62161 22026 0 3 0x98 kqread sshd-session 22026 83903 71264 0 3 0x92 kqread sshd-session 88511 430303 1 0 3 0x100083 ttyin getty 71264 320711 1 0 3 0x88 kqread sshd 71969 20765 64193 74 3 0x1100092 bpf pflogd 64193 142051 1 0 3 0x80 sbwait pflogd 73502 424408 34414 73 3 0x1100090 kqread syslogd 34414 117447 1 0 3 0x100082 sbwait syslogd 26402 34721 1 0 3 0x100080 kqread resolvd 94710 521681 57190 77 3 0x100092 kqread dhcpleased 28428 239795 57190 77 3 0x100092 kqread dhcpleased 57190 508393 1 0 3 0x80 kqread dhcpleased 10197 119083 0 0 3 0x14200 bored smr 66056 62408 0 0 2 0x14200 zerothread 47274 212480 0 0 3 0x14200 aiodoned aiodoned 24409 244484 0 0 3 0x14200 syncer update 8136 286484 0 0 3 0x14200 cleaner cleaner 78724 2539 0 0 3 0x14200 reaper reaper 79985 55124 0 0 3 0x14200 pgdaemon pagedaemon 14283 84806 0 0 3 0x14200 bored viomb 45175 246208 0 0 3 0x40014200 acpi0 acpi0 951 148822 0 0 3 0x40014200 idle1 78346 75384 0 0 3 0x14200 bored softnet3 87163 48770 0 0 3 0x14200 bored softnet2 99948 14962 0 0 3 0x14200 bored softnet1 76372 169249 0 0 3 0x14200 bored softnet0 13211 84035 0 0 3 0x14200 bored systqmp 52708 456862 0 0 3 0x14200 bored systq 74228 368841 0 0 3 0x14200 tmoslp softclockmp 51358 161032 0 0 2 0x40014200 softclock 21481 99396 0 0 3 0x40014200 idle0 1 457594 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 46811 (syz-executor) thread 0xffff80002a297c50 (343301) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff83931b90) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 malloc+0xe5 sys/kern/kern_malloc.c:174 #3 rtmap_grow+0xb2 sys/net/rtable.c:126 #4 rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:373 [inline] #4 rtable_add+0x2d9 sys/net/rtable.c:222 #5 if_createrdomain+0x40 sys/net/if.c:1966 #6 ifioctl+0x1a1e sys/net/if.c:2315 #7 sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 Process 62891 (syz-executor) thread 0xffff80002a296540 (201442) exclusive rrwlock inode r = 0 (0xfffffd8063d78d00) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 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+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0x113 sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x102 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3109 #10 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806d43f798) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x377 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:605 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3094 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 11051K 11281K 166960K 11355 0 pcb 19 12K 12K 166960K 34 0 rtable 241 7K 7K 166960K 359 0 pf 34 17K 18K 166960K 50 0 ifaddr 43 7K 7K 166960K 48 0 ifgroup 55 2K 2K 166960K 62 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 74 0 ioctlops 0 0K 4K 166960K 1486 0 iov 0 0K 12K 166960K 69 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1345 85K 85K 166960K 1436 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 89K 166960K 185 0 sigio 1 0K 0K 166960K 1 0 proc 72 91K 128K 166960K 541 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 6 0 in_multi 99 7K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 368 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 248 168K 178K 166960K 3301 0 UVM aobj 5 2K 4K 166960K 6 0 pinsyscall 41 82K 100K 166960K 1263 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 12 0K 2K 166960K 30 0 temp 37 8682K 8746K 166960K 10858 0 kqueue 17 23K 28K 166960K 39 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 33 0 30 1 0 1 1 0 8 0 rtentry 176 113 0 2 6 0 6 6 0 8 0 unpcb 144 58 0 37 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 21 0 16 1 0 1 1 0 8 0 arp 128 18 0 0 1 0 1 1 0 8 0 inpcb 328 112 0 98 2 0 2 2 0 8 0 nd6 144 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 2 0 2 1 1 0 1 0 8 0 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pffrag 232 3 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 0 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 18 0 0 1 0 1 1 0 8 0 pfstkey 128 18 0 0 1 0 1 1 0 8 0 pfstate 384 18 0 0 2 0 2 2 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 460 0 6 29 0 29 29 0 8 0 art_table 32 461 0 6 4 0 4 4 0 8 0 art_node 16 112 0 11 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 3 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1691 0 180 95 0 95 95 0 8 0 ffsino 288 1691 0 180 109 0 109 109 0 8 0 nchpl 144 1944 0 259 63 0 63 63 0 8 0 uvmvnodes 80 1802 0 0 37 0 37 37 0 8 0 vnodes 216 1802 0 0 101 0 101 101 0 8 0 namei 1024 6160 0 6158 3 2 1 2 0 8 0 percpumem 16 52 0 3 1 0 1 1 0 8 0 kstatmem 264 30 0 4 2 0 2 2 0 8 0 scxspl 216 6203 0 6203 3 2 1 2 1 8 1 plimitpl 152 35 0 18 1 0 1 1 0 8 0 sigapl 424 484 0 435 8 2 6 7 0 8 0 knotepl 120 309 0 0 10 0 10 10 0 8 0 kqueuepl 224 42 0 30 2 0 2 2 0 8 0 pipepl 336 109 0 82 3 0 3 3 0 8 0 fdescpl 520 465 0 435 3 0 3 3 0 8 0 filepl 160 1924 0 1695 11 1 10 11 0 8 0 lockfpl 104 21 0 18 1 0 1 1 0 8 0 lockfspl 48 11 0 8 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 30 0 13 1 0 1 1 0 8 0 ucredpl 104 225 0 211 1 0 1 1 0 8 0 zombiepl 144 440 0 439 2 1 1 1 0 8 0 processpl 1240 484 0 435 5 0 5 5 0 8 0 procpl 656 587 0 529 8 2 6 7 0 8 0 sosppl 168 2 0 0 1 0 1 1 0 8 0 sockpl 728 206 0 168 4 0 4 4 0 8 0 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 107 0 0 14 0 14 14 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 133 0 0 9 0 9 9 0 8 0 bufpl 280 2432 0 122 165 0 165 165 0 8 0 anonpl 32 6109 0 0 50 0 50 50 0 246 0 amapchunkpl 152 9884 0 9281 29 4 25 28 0 158 0 amappl16 200 2204 0 2145 7 1 6 6 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 131 0 118 1 0 1 1 0 8 0 amappl13 176 22 0 22 1 1 0 1 0 8 0 amappl12 168 1102 0 1072 4 1 3 3 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 246 0 245 1 0 1 1 0 8 0 amappl8 136 23 0 20 1 0 1 1 0 8 0 amappl7 128 106 0 94 1 0 1 1 0 8 0 amappl6 120 179 0 176 1 0 1 1 0 8 0 amappl5 112 124 0 115 1 0 1 1 0 8 0 amappl4 104 310 0 291 1 0 1 1 0 8 0 amappl3 96 1559 0 1451 5 2 3 4 0 8 0 amappl2 88 632 0 571 2 0 2 2 0 8 0 amappl1 80 8249 0 7655 14 1 13 14 0 8 0 amappl 88 2631 0 2457 5 0 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 1 1 0 1 1 0 8 0 uaddrrnd 24 465 0 435 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 465 0 435 1 0 1 1 0 8 0 vmmpekpl 168 5508 0 5470 2 0 2 2 0 8 0 vmmpepl 168 36389 0 34431 93 0 93 93 0 357 0 vmsppl 480 464 0 435 5 1 4 5 0 8 0 rwobjpl 72 14887 0 12118 52 0 52 52 0 8 0 pdppl 4096 937 0 870 93 22 71 83 0 8 4 pvpl 32 13915 0 0 114 1 113 113 0 265 0 pmappl 256 464 0 435 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 372 0 27 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:438 panic(ffffffff8346de67) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83415b5a,ffffffff8333ffab,83,ffffffff834600af) at __assert+0x29 sys/kern/subr_prf.c:-1 rtable_init() at rtable_init rtable_add(2) at rtable_add+0x2d9 rtable_alloc sys/net/rtable.c:373 [inline] rtable_add(2) at rtable_add+0x2d9 sys/net/rtable.c:222 if_createrdomain(2,ffff800001495000) at if_createrdomain+0x40 sys/net/if.c:1966 ifioctl(ffff800010fdd9a8,8020699f,ffff800039bf0330,ffff80002a297c50) at ifioctl+0x1a1e sys/net/if.c:2315 sys_ioctl(ffff80002a297c50,ffff800039bf0510,ffff800039bf0460) at sys_ioctl+0x5c3 sys/kern/sys_generic.c:-1 syscall(ffff800039bf0510) at syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800039bf0510) at syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4c5054b43d0, count: -10 ddb{0}> machine ddbcpu 1