uvm_fault(0xfffffd807f00c450, 0x100000008, 0, 2) -> e kernel: page fault trap, code=0 Stopped at arp_rtrequest+0x15f: movq %rcx,0x8(%r15) ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xfffffd807f00c450, 0x100000008, 0, 2) -> e arp_rtrequest() at arp_rtrequest+0x15f sys/netinet/if_ether.c:201 end trace frame: 0xffff800022e37200, count: 0 ddb{0}> trace arp_rtrequest() at arp_rtrequest+0x15f sys/netinet/if_ether.c:201 rtrequest_delete(ffff800022e372b0,40,ffff8000001732a8,ffff800022e37228,0) at rtrequest_delete+0x21c _atomic_inc_int sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:139 [inline] rtrequest_delete(ffff800022e372b0,40,ffff8000001732a8,ffff800022e37228,0) at rtrequest_delete+0x21c sys/net/route.c:792 rtm_output(ffff800000b0ac00,ffff800022e37360,ffff800022e372b0,40,0) at rtm_output+0x5dc sys/net/rtsock.c:955 route_output(fffffd806f0d5e00,fffffd806f6ff000,0,0) at route_output+0x7d2 sys/net/rtsock.c:814 route_usrreq(fffffd806f6ff000,9,fffffd806f0d5e00,0,0,ffff800020b38c48) at route_usrreq+0x363 sys/net/rtsock.c:271 sosend(fffffd806f6ff000,0,ffff800022e37550,0,0,80) at sosend+0x668 sys/kern/uipc_socket.c:513 sendit(ffff800020b38c48,3,ffff800022e37630,0,ffff800022e37730) at sendit+0x52f sys/kern/uipc_syscalls.c:662 sys_sendto(ffff800020b38c48,ffff800022e376c8,ffff800022e37730) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 syscall(ffff800022e377a0) at syscall+0x552 mi_syscall sys/sys/syscall_mi.h:90 [inline] syscall(ffff800022e377a0) at syscall+0x552 sys/arch/amd64/amd64/trap.c:554 Xsyscall(6,0,ffffffffffffffd8,0,6,93ba40b010) at Xsyscall+0x128 end of kernel end trace frame: 0x9623c386b0, count: -10 ddb{0}> show registers rdi 0xffffffff8118c547 arp_rtrequest+0x157 rsi 0x471 rbp 0xffff800022e37170 rbx 0xffff800000ac6210 rdx 0x472 rcx 0xdead4110dead4110 rax 0xffff800000ac6218 r8 0xffffffff8118c50f arp_rtrequest+0x11f r9 0x5 r10 0x11 r11 0xf4f0914901bc3f94 r12 0xffff8000001732a8 r13 0x2 r14 0xfffffd8064d49ee0 r15 0x100000000 rip 0xffffffff8118c54f arp_rtrequest+0x15f cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800022e370f0 ss 0x10 arp_rtrequest+0x15f: movq %rcx,0x8(%r15) ddb{0}> show proc PROC (syz-executor.1) pid=90269 stat=onproc flags process=0 proc=4000000 pri=78, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800020b389d8,0xffffffff8237c718 process=0xffff800020afba48 user=0xffff800022e32000, vmspace=0xfffffd807f00c450 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7464 296272 97201 0 2 0 syz-executor.1 * 7464 90269 97201 0 7 0x4000000 syz-executor.1 83429 423617 29752 0 2 0x2 syz-executor.0 47758 428270 1 0 3 0x100083 ttyin getty 55607 381090 0 0 3 0x14200 bored sosplice 97201 122668 29752 0 2 0x482 syz-executor.1 29752 504512 16019 0 3 0x82 thrsleep syz-fuzzer 29752 210727 16019 0 2 0x4000482 syz-fuzzer 29752 423893 16019 0 3 0x4000082 thrsleep syz-fuzzer 29752 11739 16019 0 3 0x4000082 thrsleep syz-fuzzer 29752 365900 16019 0 3 0x4000082 thrsleep syz-fuzzer 29752 133993 16019 0 3 0x4000082 thrsleep syz-fuzzer 29752 314054 16019 0 3 0x4000082 thrsleep syz-fuzzer 29752 3356 16019 0 2 0x4000482 syz-fuzzer 29752 429485 16019 0 3 0x4000082 kqread syz-fuzzer 29752 243763 16019 0 3 0x4000082 thrsleep syz-fuzzer 16019 92513 99999 0 3 0x10008a pause ksh 99999 98551 52554 0 3 0x92 select sshd 52554 58182 1 0 3 0x80 select sshd 73670 70494 59551 74 3 0x100092 bpf pflogd 59551 517807 1 0 3 0x80 netio pflogd 53985 37797 51627 73 7 0x100090 syslogd 51627 523813 1 0 3 0x100082 netio syslogd 12174 510286 1 77 3 0x100090 poll dhclient 75519 173101 1 0 3 0x80 poll dhclient 24275 24987 0 0 3 0x14200 pgzero zerothread 88356 446163 0 0 3 0x14200 aiodoned aiodoned 41100 222096 0 0 3 0x14200 syncer update 34659 107066 0 0 3 0x14200 cleaner cleaner 11254 51133 0 0 3 0x14200 reaper reaper 49736 348258 0 0 3 0x14200 pgdaemon pagedaemon 55230 47936 0 0 3 0x14200 bored crynlk 82360 389436 0 0 3 0x14200 bored crypto 85860 498783 0 0 3 0x40014200 acpi0 acpi0 51166 268986 0 0 3 0x40014200 idle1 18298 266292 0 0 3 0x14200 bored softnet 35942 296510 0 0 3 0x14200 bored systqmp 91552 435849 0 0 3 0x14200 bored systq 3596 235521 0 0 3 0x40014200 bored softclock 14691 126363 0 0 3 0x40014200 idle0 22254 204622 0 0 3 0x14200 bored smr 1 71855 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 7464 (syz-executor.1) thread 0xffff800020b38c48 (90269) exclusive rwlock netlock r = 0 (0xffffffff821abb18) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 rtm_output+0x5c3 sys/net/rtsock.c:954 #2 route_output+0x7d2 sys/net/rtsock.c:814 #3 route_usrreq+0x363 sys/net/rtsock.c:271 #4 sosend+0x668 sys/kern/uipc_socket.c:513 #5 sendit+0x52f sys/kern/uipc_syscalls.c:662 #6 sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 #7 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:90 [inline] #7 syscall+0x552 sys/arch/amd64/amd64/trap.c:554 #8 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8234cce8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 solock+0x66 sys/kern/uipc_socket2.c:292 #2 sosend+0x52c sys/kern/uipc_socket.c:501 #3 sendit+0x52f sys/kern/uipc_syscalls.c:662 #4 sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 #5 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:90 [inline] #5 syscall+0x552 sys/arch/amd64/amd64/trap.c:554 #6 Xsyscall+0x128 Process 83429 (syz-executor.0) thread 0xffff800020b39878 (423617) exclusive rrwlock inode r = 0 (0xfffffd8064c702c8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x133 sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0x6a sys/kern/vfs_vops.c:449 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2974 #9 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:90 [inline] #9 syscall+0x552 sys/arch/amd64/amd64/trap.c:554 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b769818) #0 witness_lock+0x52e sys/kern/subr_witness.c:1161 #1 rw_enter+0x46d sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:435 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:602 #4 vn_lock+0x6e sys/kern/vfs_vnops.c:549 #5 vfs_lookup+0xe9 sys/kern/vfs_lookup.c:422 #6 namei+0x61c sys/kern/vfs_lookup.c:252 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2959 #8 syscall+0x552 mi_syscall sys/sys/syscall_mi.h:90 [inline] #8 syscall+0x552 sys/arch/amd64/amd64/trap.c:554 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9541 6438K 7888K 78643K 21246 0 0 pcb 26 9K 11K 78643K 11242 0 0 rtable 5425 336K 337K 78643K 23340 0 0 ifaddr 62 17K 19K 78643K 593 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1576 0 0 iov 0 0K 28K 78643K 543 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1203 76K 77K 78643K 6992 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 41 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 12 1K 1K 78643K 12 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12628 0 0 file desc 5 13K 25K 78643K 13898 0 0 sigio 0 0K 0K 78643K 336 0 0 proc 54 51K 83K 78643K 1174 0 0 subproc 32 2K 2K 78643K 68 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 345 0 0 in_multi 33 2K 2K 78643K 229 0 0 ether_multi 1 0K 0K 78643K 32 0 0 mrt 0 0K 0K 78643K 40 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 96 424K 424K 78643K 96 0 0 exec 0 0K 1K 78643K 586 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 114 22K 31K 78643K 34835 0 0 UVM aobj 130 4K 4K 78643K 139 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 341 0 0 NDP 13 0K 0K 78643K 157 0 0 temp 187 2736K 3231K 78643K 36297 0 0 kqueue 0 0K 0K 78643K 12 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 8 0 2 1 0 1 1 0 8 0 inpcbpl 280 1896 0 1889 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtentry 112 4849 0 4534 10 0 10 10 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 11 0 11 2 2 0 1 0 8 0 tcpcb 544 639 0 635 1 0 1 1 0 8 0 rttmr 72 14 0 14 3 3 0 1 0 8 0 nd6 48 9 0 3 1 0 1 1 0 8 0 ppxss 1128 124 0 124 14 14 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 65 0 63 1 0 1 1 0 8 0 pfstkey 112 65 0 63 1 0 1 1 0 8 0 pfstate 328 65 0 63 4 3 1 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 25 0 0 25 0 25 25 0 8 0 art_heap4 256 374 0 44 21 0 21 21 0 8 0 art_table 32 399 0 44 3 0 3 3 0 8 0 art_node 16 346 0 263 1 0 1 1 0 8 0 sysvmsgpl 40 59 0 19 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 137 0 9 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 22590 0 21115 48 0 48 48 0 8 0 ffsino 272 22590 0 21115 99 0 99 99 0 8 0 nchpl 144 38553 0 36878 63 0 63 63 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 200 5926 0 0 312 0 312 312 0 8 0 namei 1024 95906 0 95905 3 2 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 6 0 6 2 2 0 1 0 8 0 scxspl 192 117711 0 117711 20 19 1 6 0 8 1 plimitpl 152 180 0 172 1 0 1 1 0 8 0 sigapl 432 14094 0 14079 3 1 2 3 0 8 0 futexpl 56 75651 0 75651 2 1 1 1 0 8 1 knotepl 112 855 0 836 1 0 1 1 0 8 0 kqueuepl 104 869 0 867 1 0 1 1 0 8 0 pipepl 112 2548 0 2529 4 3 1 2 0 8 0 fdescpl 488 14095 0 14079 3 0 3 3 0 8 0 filepl 152 49941 0 49841 22 17 5 7 0 8 1 lockfpl 104 1520 0 1520 22 21 1 1 0 8 1 lockfspl 48 523 0 523 22 21 1 1 0 8 1 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 70 0 59 1 0 1 1 0 8 0 ucredpl 96 5420 0 5411 1 0 1 1 0 8 0 zombiepl 144 14079 0 14079 2 1 1 1 0 8 1 processpl 840 14111 0 14079 4 0 4 4 0 8 0 procpl 624 33736 0 33694 4 0 4 4 0 8 0 srpgc 64 20 0 20 4 4 0 1 0 8 0 sosppl 128 84 0 84 11 11 0 1 0 8 0 sockpl 384 12906 0 12886 12 9 3 4 0 8 1 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 16 0 0 2 0 2 2 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 410 0 0 13 5 8 11 0 8 0 mtagpl 80 4 0 0 1 0 1 1 0 8 0 mbufpl 256 704 0 0 13 0 13 13 0 8 0 bufpl 256 29767 0 22759 439 0 439 439 0 8 0 anonpl 16 981589 0 975872 141 108 33 45 0 125 0 amapchunkpl 152 57173 0 57082 21 15 6 9 0 158 0 amappl16 192 61126 0 60771 135 117 18 31 0 8 0 amappl15 184 3098 0 3096 1 0 1 1 0 8 0 amappl14 176 3123 0 3117 2 1 1 1 0 8 0 amappl12 160 10768 0 10760 1 0 1 1 0 8 0 amappl11 152 66 0 48 1 0 1 1 0 8 0 amappl10 144 86 0 78 1 0 1 1 0 8 0 amappl9 136 615 0 611 1 0 1 1 0 8 0 amappl8 128 220 0 176 2 0 2 2 0 8 0 amappl7 120 48 0 42 1 0 1 1 0 8 0 amappl6 112 67 0 57 1 0 1 1 0 8 0 amappl5 104 10887 0 10871 1 0 1 1 0 8 0 amappl4 96 3517 0 3486 1 0 1 1 0 8 0 amappl3 88 11319 0 11308 1 0 1 1 0 8 0 amappl2 80 115336 0 115264 4 2 2 3 0 8 0 amappl1 72 277254 0 276813 25 15 10 20 0 8 0 amappl 80 34050 0 34015 1 0 1 1 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma64 64 259 0 259 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 17 0 17 1 1 0 1 0 8 0 aobjpl 64 138 0 9 3 0 3 3 0 8 0 uaddrrnd 24 14095 0 14079 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 14095 0 14079 1 0 1 1 0 8 0 vmmpekpl 168 68935 0 68900 2 0 2 2 0 8 0 vmmpepl 168 1392946 0 1391492 188 119 69 79 0 357 2 vmsppl 368 14094 0 14079 2 0 2 2 0 8 0 pdppl 4096 28197 0 28158 6 0 6 6 0 8 1 pvpl 32 2943376 0 2934226 336 242 94 118 0 265 0 pmappl 232 14094 0 14079 2 1 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 642 0 10 19 0 19 19 0 8 0