uvm_fault(0xffffffff8263e320, 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(0xffffffff8263e320, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800023fe38c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023fe3700, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800023fe38c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fe3710) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd807b582008,ffff800023fe38c8,10,fffffd807f7bfb40) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067080a30,ffff800023fe38c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ece9d8,f0,ffff800023fe38c8,0,ffff800023fe39b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ece9d8,ffff800023fe3960,ffff800023fe39b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fe3a30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fe3a30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc6af40bc1f0, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800023fe3650 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff8000009d77c0 rax 0xffffffff82194303 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x3b3b29154fba4fcf r11 0x787b82bed5eb75ea r12 0 r13 0x3da r14 0xffff800000a23e60 r15 0xffff800023fe38c8 rip 0xffffffff82194308 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023fe35f0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=486127 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ece768,0xffffffff82693af8 process=0xffff800020ed9b10 user=0xffff800023fde000, vmspace=0xfffffd8068d8e8b0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17837 148373 60974 0 7 0 syz-executor.1 17837 62721 60974 0 2 0x4000000 syz-executor.1 *17837 486127 60974 0 7 0x4000000 syz-executor.1 23412 190840 83211 0 3 0x80 nanosleep syz-executor.0 23412 408196 83211 0 3 0x4000080 fsleep syz-executor.0 23412 144416 83211 0 3 0x4000080 fsleep syz-executor.0 23412 163544 83211 0 3 0x4000080 fsleep syz-executor.0 73657 302107 1 0 3 0x100083 ttyin getty 23831 417225 0 0 3 0x14200 acct acct 25501 395718 0 0 3 0x14200 bored sosplice 60974 146163 66524 0 3 0x82 nanosleep syz-executor.1 83211 118037 66524 0 3 0x82 nanosleep syz-executor.0 66524 486863 97414 0 3 0x82 thrsleep syz-fuzzer 66524 347489 97414 0 3 0x4000082 thrsleep syz-fuzzer 66524 364013 97414 0 3 0x4000082 kqread syz-fuzzer 66524 510507 97414 0 3 0x4000082 thrsleep syz-fuzzer 66524 213690 97414 0 3 0x4000082 thrsleep syz-fuzzer 66524 106162 97414 0 3 0x4000082 thrsleep syz-fuzzer 66524 424282 97414 0 3 0x4000082 thrsleep syz-fuzzer 66524 194543 97414 0 3 0x4000082 thrsleep syz-fuzzer 66524 370381 97414 0 3 0x4000082 thrsleep syz-fuzzer 66524 72230 97414 0 3 0x4000082 thrsleep syz-fuzzer 97414 410410 96869 0 3 0x10008a pause ksh 96869 475960 56329 0 3 0x92 select sshd 56329 272565 1 0 3 0x80 select sshd 9077 283256 50902 74 3 0x100092 bpf pflogd 50902 477369 1 0 3 0x80 netio pflogd 50342 338152 50330 73 3 0x100090 kqread syslogd 50330 94359 1 0 3 0x100082 netio syslogd 44393 20153 1 77 3 0x100090 poll dhclient 53364 427859 1 0 3 0x80 poll dhclient 14678 397779 0 0 3 0x14200 bored smr 94305 336430 0 0 3 0x14200 pgzero zerothread 36439 140268 0 0 3 0x14200 aiodoned aiodoned 60805 400783 0 0 3 0x14200 syncer update 52698 337734 0 0 3 0x14200 cleaner cleaner 93138 514266 0 0 3 0x14200 reaper reaper 8962 25478 0 0 3 0x14200 pgdaemon pagedaemon 49128 429235 0 0 3 0x14200 bored crynlk 85983 91766 0 0 3 0x14200 bored crypto 40078 138404 0 0 3 0x40014200 acpi0 acpi0 60487 300024 0 0 3 0x40014200 idle1 39497 455015 0 0 3 0x14200 bored softnet 97145 369486 0 0 3 0x14200 bored systqmp 21136 67811 0 0 3 0x14200 bored systq 89195 494953 0 0 3 0x40014200 bored softclock 20263 38932 0 0 3 0x40014200 idle0 1 332417 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 17837 (syz-executor.1) thread 0xffff800020ece9d8 (486127) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82640b58) #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 9528 6430K 6947K 78643K 12267 0 pcb 13 8K 8K 78643K 151 0 rtable 79 3K 4K 78643K 444 0 ifaddr 83 16K 17K 78643K 210 0 counters 43 33K 34K 78643K 89 0 ioctlops 0 0K 4K 78643K 1512 0 iov 0 0K 18K 78643K 122 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1686 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 201 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 683 0 sigio 0 0K 0K 78643K 6 0 proc 61 63K 95K 78643K 502 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 72 0 in_multi 57 2K 3K 78643K 150 0 ether_multi 1 0K 0K 78643K 21 0 mrt 1 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 278 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 135 88K 90K 78643K 3293 0 UVM aobj 28 7K 7K 78643K 32 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 98 0 NDP 13 0K 0K 78643K 44 0 temp 136 3046K 3111K 78643K 8543 0 kqueue 3 4K 10K 78643K 39 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 8 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 55 0 53 1 0 1 1 0 8 0 rtentry 112 69 0 41 2 0 2 2 0 8 0 unpcb 120 326 0 316 1 0 1 1 0 8 0 syncache 264 13 0 13 4 4 0 1 0 8 0 tcpqe 32 480 0 480 2 2 0 1 0 8 0 tcpcb 544 546 0 542 1 0 1 1 0 8 0 inpcb 280 1696 0 1687 3 1 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 10 0 8 1 0 1 1 0 8 0 pkpcb 40 6 0 6 2 2 0 1 0 8 0 ppxss 1128 2 0 2 1 1 0 1 0 8 0 pffrag 232 8 0 8 4 4 0 1 0 482 0 pffrnode 88 8 0 8 4 4 0 1 0 8 0 pffrent 40 145 0 145 4 4 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 94 0 42 1 0 1 1 0 8 0 pfstkey 112 94 0 42 2 0 2 2 0 8 0 pfstate 328 94 0 42 5 0 5 5 0 8 0 pfrule 1360 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 256 360 0 232 12 2 10 12 0 8 0 art_table 32 361 0 232 2 0 2 2 0 8 0 art_node 16 68 0 45 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 18 2 1 1 1 0 8 0 semapl 112 199 0 189 1 0 1 1 0 8 0 shmpl 112 30 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2370 0 963 90 1 89 89 0 8 0 ffsino 272 2370 0 963 95 0 95 95 0 8 0 nchpl 144 3515 0 1912 60 0 60 60 0 8 0 uvmvnodes 72 2773 0 0 51 0 51 51 0 8 0 vnodes 208 2773 0 0 146 0 146 146 0 8 0 namei 1024 9808 0 9808 3 2 1 1 0 8 1 percpumem 16 55 0 23 1 0 1 1 0 8 0 vcpupl 1984 7 0 0 1 0 1 1 0 8 0 vmpool 560 15 0 8 3 2 1 1 0 8 0 scxspl 192 10767 0 10767 15 14 1 6 0 8 1 plimitpl 152 78 0 70 1 0 1 1 0 8 0 sigapl 424 901 0 867 4 0 4 4 0 8 0 futexpl 56 11977 0 11974 3 2 1 1 0 8 0 knotepl 112 100 0 81 1 0 1 1 0 8 0 kqueuepl 144 134 0 132 1 0 1 1 0 8 0 pipelkpl 48 166 0 156 1 0 1 1 0 8 0 pipepl 120 332 0 313 1 0 1 1 0 8 0 fdescpl 496 884 0 867 3 0 3 3 0 8 0 filepl 152 5816 0 5714 6 1 5 6 0 8 0 lockfpl 104 164 0 163 1 0 1 1 0 8 0 lockfspl 48 47 0 46 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 25 0 14 1 0 1 1 0 8 0 ucredpl 96 478 0 469 1 0 1 1 0 8 0 zombiepl 144 867 0 867 2 1 1 1 0 8 1 processpl 984 901 0 867 6 1 5 5 0 8 0 procpl 624 2464 0 2416 4 0 4 4 0 8 0 sosppl 128 12 0 12 4 4 0 1 0 8 0 sockpl 400 2083 0 2062 9 5 4 4 0 8 1 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 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 235 0 0 29 0 29 29 0 8 0 mtagpl 80 128 0 0 3 0 3 3 0 8 0 mbufpl 256 752 0 0 42 0 42 42 0 8 0 bufpl 280 4919 0 143 342 0 342 342 0 8 0 anonpl 16 101394 0 86087 98 34 64 75 0 124 0 amapchunkpl 152 5459 0 5310 26 20 6 19 0 158 0 amappl16 192 4871 0 4044 74 32 42 52 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 25 0 20 1 0 1 1 0 8 0 amappl13 168 33 0 31 1 0 1 1 0 8 0 amappl12 160 330 0 323 1 0 1 1 0 8 0 amappl11 152 63 0 47 1 0 1 1 0 8 0 amappl10 144 351 0 346 1 0 1 1 0 8 0 amappl9 136 389 0 388 1 0 1 1 0 8 0 amappl8 128 353 0 320 2 0 2 2 0 8 0 amappl7 120 449 0 437 1 0 1 1 0 8 0 amappl6 112 25 0 21 1 0 1 1 0 8 0 amappl5 104 1101 0 1082 1 0 1 1 0 8 0 amappl4 96 509 0 477 1 0 1 1 0 8 0 amappl3 88 121 0 115 1 0 1 1 0 8 0 amappl2 80 6111 0 6032 2 0 2 2 0 8 0 amappl1 72 29083 0 28605 23 13 10 18 0 8 0 amappl 80 2732 0 2680 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 31 0 4 1 0 1 1 0 8 0 uaddrrnd 24 899 0 875 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 899 0 875 1 0 1 1 0 8 0 vmmpekpl 168 10991 0 10958 2 0 2 2 0 8 0 vmmpepl 168 116165 0 114040 134 41 93 105 0 357 0 vmsppl 368 898 0 875 3 0 3 3 0 8 0 pdppl 4096 1806 0 1757 7 0 7 7 0 8 0 pvpl 32 306467 0 288666 213 49 164 180 0 265 18 pmappl 232 898 0 875 4 2 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 310 0 13 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8251cff0) 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(ffffffff82640950) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82640950) at __mp_lock+0x127 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f __mp_lock(ffffffff82640950) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82640950) at __mp_lock+0x127 sys/kern/kern_lock.c:147 syscall(ffff80002318fae0) at syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline] syscall(ffff80002318fae0) at syscall+0x400 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe7680, count: -9 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800023fe38c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fe3710) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd807b582008,ffff800023fe38c8,10,fffffd807f7bfb40) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067080a30,ffff800023fe38c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ece9d8,f0,ffff800023fe38c8,0,ffff800023fe39b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ece9d8,ffff800023fe3960,ffff800023fe39b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fe3a30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fe3a30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc6af40bc1f0, count: -8