uvm_fault(0xffffffff827fad80, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic kernel page fault uvm_fault(0xffffffff827fad80, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff8000230ffbc8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff8000230ffa00, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff8000230ffbc8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff8000230ffa10) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd807ea21008,ffff8000230ffbc8,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80668e7c00,ffff8000230ffbc8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020dfd608,f0,ffff8000230ffbc8,0,ffff8000230ffcb0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020dfd608,ffff8000230ffc60,ffff8000230ffcb0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff8000230ffd30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230ffd30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa8f5755a100, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff8000230ff950 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff800000adb6c0 rax 0xffffffff810ec513 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xa79ed17af322492d r11 0xc2eed63dc6d903f6 r12 0 r13 0x3da r14 0xffff800000af6660 r15 0xffff8000230ffbc8 rip 0xffffffff810ec518 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000230ff8f0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=487940 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=66, nice=20 forw=0xffffffffffffffff, list=0xffff800020dfd398,0xffffffff828d3c30 process=0xffff800020e08400 user=0xffff8000230fa000, vmspace=0xfffffd806e8fc008 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 76198 48609 76172 0 2 0 syz-executor.1 *76198 487940 76172 0 7 0x4000000 syz-executor.1 6553 167260 0 0 3 0x14200 bored sosplice 76172 498290 61704 0 3 0x82 nanosleep syz-executor.1 55808 103110 61704 0 3 0x82 piperd syz-executor.0 61704 191469 54641 0 3 0x82 thrsleep syz-fuzzer 61704 96249 54641 0 3 0x4000082 nanosleep syz-fuzzer 61704 453372 54641 0 3 0x4000082 thrsleep syz-fuzzer 61704 350991 54641 0 2 0x4000002 syz-fuzzer 61704 133743 54641 0 3 0x4000082 thrsleep syz-fuzzer 61704 504001 54641 0 7 0x4000002 syz-fuzzer 61704 156864 54641 0 3 0x4000082 thrsleep syz-fuzzer 61704 498199 54641 0 3 0x4000082 thrsleep syz-fuzzer 61704 347387 54641 0 3 0x4000082 thrsleep syz-fuzzer 61704 432414 54641 0 3 0x4000082 thrsleep syz-fuzzer 61704 290533 54641 0 3 0x4000082 thrsleep syz-fuzzer 54641 12216 90786 0 3 0x10008a pause ksh 90786 145518 94670 0 3 0x92 select sshd 31743 271636 1 0 3 0x100083 ttyin getty 94670 411451 1 0 3 0x80 select sshd 49248 378940 66001 74 3 0x100092 bpf pflogd 66001 24516 1 0 3 0x80 netio pflogd 96537 321511 42978 73 3 0x100090 kqread syslogd 42978 148892 1 0 3 0x100082 netio syslogd 41336 168064 1 77 3 0x100090 poll dhclient 86564 148411 1 0 3 0x80 poll dhclient 80824 206852 0 0 3 0x14200 bored smr 92524 300665 0 0 2 0x14200 zerothread 20338 167295 0 0 3 0x14200 aiodoned aiodoned 82425 300527 0 0 3 0x14200 syncer update 89893 511904 0 0 3 0x14200 cleaner cleaner 62237 142439 0 0 3 0x14200 reaper reaper 36966 312815 0 0 3 0x14200 pgdaemon pagedaemon 78012 199123 0 0 3 0x14200 bored crynlk 16877 27462 0 0 3 0x14200 bored crypto 91606 438538 0 0 3 0x40014200 acpi0 acpi0 81160 504972 0 0 3 0x40014200 idle1 80904 343213 0 0 3 0x14200 bored softnet 39286 207608 0 0 3 0x14200 bored systqmp 99092 313682 0 0 3 0x14200 bored systq 50623 222913 0 0 3 0x40014200 bored softclock 37481 182954 0 0 3 0x40014200 idle0 1 508695 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 76198 (syz-executor.1) thread 0xffff800020dfd608 (487940) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b04d8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 vn_read+0x45 sys/kern/vfs_vnops.c:357 #2 dofilereadv+0x1a1 sys/kern/sys_generic.c:237 #3 sys_read+0x83 sys/kern/sys_generic.c:157 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9533 6422K 6801K 78643K 11081 0 pcb 13 8K 8K 78643K 97 0 rtable 125 8K 10K 78643K 428 0 ifaddr 89 17K 17K 78643K 144 0 sysctl 3 1K 1K 78643K 3 0 counters 43 33K 34K 78643K 47 0 ioctlops 0 0K 4K 78643K 1530 0 iov 0 0K 16K 78643K 72 0 mount 1 1K 1K 78643K 1 0 vnodes 1218 77K 77K 78643K 1351 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 13 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 58 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 440 0 sigio 0 0K 0K 78643K 10 0 proc 64 63K 95K 78643K 477 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 31 0 in_multi 51 2K 2K 78643K 167 0 ether_multi 1 0K 0K 78643K 14 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 236 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 129 55K 55K 78643K 2276 0 UVM aobj 21 2K 2K 78643K 26 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 62 0 NDP 14 0K 0K 78643K 30 0 temp 117 3866K 3934K 78643K 9832 0 kqueue 3 4K 10K 78643K 13 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 9 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 376 0 374 1 0 1 1 0 8 0 rtentry 112 77 0 32 2 0 2 2 0 8 0 unpcb 120 249 0 239 1 0 1 1 0 8 0 syncache 264 9 0 9 4 3 1 1 0 8 1 tcpqe 32 621 0 621 4 3 1 1 0 8 1 tcpcb 544 161 0 157 1 0 1 1 0 8 0 inpcb 296 720 0 710 2 0 2 2 0 8 1 nd6 48 25 0 20 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 4 0 3 2 1 1 1 0 482 0 pffrnode 88 4 0 3 2 1 1 1 0 8 0 pffrent 40 10 0 9 2 1 1 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 pfrktable 1344 51 0 45 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 54 0 15 1 0 1 1 0 8 0 pfstkey 112 54 0 15 2 0 2 2 0 8 0 pfstate 328 54 0 15 4 0 4 4 0 8 0 pfrule 1360 33 0 24 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 226 0 24 13 0 13 13 0 8 0 art_table 32 227 0 24 2 0 2 2 0 8 0 art_node 16 76 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 56 0 46 1 0 1 1 0 8 0 shmpl 112 24 0 7 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1980 0 575 89 0 89 89 0 8 0 ffsino 272 1980 0 575 96 1 95 95 0 8 0 nchpl 144 2789 0 1173 62 1 61 61 0 8 1 uvmvnodes 72 2116 0 0 39 0 39 39 0 8 0 vnodes 208 2116 0 0 112 0 112 112 0 8 0 namei 1024 7366 0 7366 2 1 1 1 0 8 1 percpumem 16 34 0 2 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 8 0 4 2 1 1 1 0 8 0 pfiaddrpl 120 18 0 14 1 0 1 1 0 8 0 scxspl 192 8756 0 8756 10 9 1 7 0 8 1 plimitpl 152 25 0 17 1 0 1 1 0 8 0 sigapl 424 656 0 624 4 0 4 4 0 8 0 futexpl 56 6582 0 6582 1 0 1 1 0 8 1 knotepl 112 73 0 54 1 0 1 1 0 8 0 kqueuepl 144 48 0 46 1 0 1 1 0 8 0 pipepl 304 138 0 128 3 2 1 2 0 8 0 fdescpl 496 640 0 624 3 0 3 3 0 8 0 filepl 152 3694 0 3593 6 1 5 5 0 8 1 lockfpl 104 130 0 129 1 0 1 1 0 8 0 lockfspl 48 36 0 35 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 213 0 204 1 0 1 1 0 8 0 zombiepl 144 624 0 624 2 1 1 1 0 8 1 processpl 984 656 0 624 6 1 5 5 0 8 0 procpl 624 1488 0 1445 4 0 4 4 0 8 0 sosppl 128 1 0 1 1 0 1 1 0 8 1 sockpl 400 1347 0 1327 6 2 4 4 0 8 1 mcl64k 65536 14 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 198 0 0 24 0 24 24 0 8 0 mtagpl 96 42 0 0 2 0 2 2 0 8 0 mbufpl 256 373 0 0 22 0 22 22 0 8 0 bufpl 280 4385 0 135 304 0 304 304 0 8 0 anonpl 16 69006 0 52335 71 3 68 69 0 124 0 amapchunkpl 152 4039 0 3885 25 17 8 20 0 158 1 amappl16 192 2918 0 2010 47 1 46 47 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 293 0 285 1 0 1 1 0 8 0 amappl13 168 29 0 25 2 1 1 1 0 8 0 amappl12 160 9 0 6 2 1 1 1 0 8 0 amappl11 152 51 0 36 1 0 1 1 0 8 0 amappl10 144 17 0 13 1 0 1 1 0 8 0 amappl9 136 321 0 319 1 0 1 1 0 8 0 amappl8 128 362 0 328 2 0 2 2 0 8 0 amappl7 120 125 0 112 1 0 1 1 0 8 0 amappl6 112 35 0 28 2 1 1 1 0 8 0 amappl5 104 700 0 683 1 0 1 1 0 8 0 amappl4 96 484 0 458 1 0 1 1 0 8 0 amappl3 88 374 0 368 1 0 1 1 0 8 0 amappl2 80 4210 0 4138 2 0 2 2 0 8 0 amappl1 72 23221 0 22769 24 14 10 18 0 8 0 amappl 80 1743 0 1695 2 0 2 2 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 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 64 25 0 5 1 0 1 1 0 8 0 uaddrrnd 24 648 0 628 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 648 0 628 1 0 1 1 0 8 0 vmmpekpl 168 8731 0 8697 2 0 2 2 0 8 0 vmmpepl 168 83726 0 81633 134 41 93 115 0 357 0 vmsppl 368 647 0 628 2 0 2 2 0 8 0 pdppl 4096 1303 0 1260 7 1 6 6 0 8 0 pvpl 32 223420 0 203610 185 21 164 170 0 265 3 pmappl 232 647 0 628 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 280 0 8 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8273aff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xc6 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff828b02d0) at __mp_lock+0x120 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b02d0) at __mp_lock+0x120 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0xc002a69a68, count: -6 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff8000230ffbc8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff8000230ffa10) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd807ea21008,ffff8000230ffbc8,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80668e7c00,ffff8000230ffbc8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020dfd608,f0,ffff8000230ffbc8,0,ffff8000230ffcb0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020dfd608,ffff8000230ffc60,ffff8000230ffcb0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff8000230ffd30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff8000230ffd30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa8f5755a100, count: -8