uvm_fault(0xffffffff82574780, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xffffffff82574780, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800023f83c88,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023f83ac0, count: 0 ddb{0}> trace tun_dev_read(5d01,ffff800023f83c88,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f83ad0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e5de1a8,ffff800023f83c88,10,fffffd807f7bfa20) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067016578,ffff800023f83c88,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e92288,f0,ffff800023f83c88,0,ffff800023f83d70) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e92288,ffff800023f83d20,ffff800023f83d70) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f83df0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f83df0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8bfb3e94a90, count: -8 ddb{0}> show registers rdi 0 rsi 0x3da rbp 0xffff800023f83a10 rbx 0xfffffd0000000000 rdx 0x153 rcx 0xffff800000a2fa40 rax 0xffffffff818319e3 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x683f81a710dff8ee r11 0x7f77e3d851ff05fa r12 0 r13 0x3da r14 0xffff8000009d5660 r15 0xffff800023f83c88 rip 0xffffffff818319e8 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023f839b0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.1) pid=273502 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e92768,0xffffffff82691948 process=0xffff800020ec6028 user=0xffff800023f7e000, vmspace=0xfffffd806e9615c8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 84269 396896 70733 0 2 0 syz-executor.1 *84269 273502 70733 0 7 0x4000000 syz-executor.1 6331 523811 26530 0 3 0x82 piperd syz-executor.0 38486 147745 0 0 3 0x14200 bored sosplice 70733 330102 26530 0 3 0x82 nanosleep syz-executor.1 26530 90262 59805 0 3 0x82 thrsleep syz-fuzzer 26530 507963 59805 0 3 0x4000082 nanosleep syz-fuzzer 26530 213941 59805 0 3 0x4000082 thrsleep syz-fuzzer 26530 167549 59805 0 3 0x4000082 thrsleep syz-fuzzer 26530 456066 59805 0 3 0x4000082 kqread syz-fuzzer 26530 521014 59805 0 3 0x4000082 thrsleep syz-fuzzer 26530 52822 59805 0 3 0x4000082 thrsleep syz-fuzzer 26530 206891 59805 0 3 0x4000082 thrsleep syz-fuzzer 26530 408978 59805 0 7 0x4000002 syz-fuzzer 26530 396982 59805 0 3 0x4000082 thrsleep syz-fuzzer 59805 471573 66848 0 3 0x10008a pause ksh 66848 492976 69641 0 3 0x92 select sshd 46858 40343 1 0 3 0x100083 ttyin getty 69641 52300 1 0 3 0x80 select sshd 10607 86519 4241 74 3 0x100092 bpf pflogd 4241 386216 1 0 3 0x80 netio pflogd 74276 165231 50574 73 3 0x100090 kqread syslogd 50574 317830 1 0 3 0x100082 netio syslogd 73390 178940 1 77 3 0x100090 poll dhclient 60214 418010 1 0 3 0x80 poll dhclient 23188 328141 0 0 3 0x14200 bored smr 75485 287613 0 0 2 0x14200 zerothread 24047 249884 0 0 3 0x14200 aiodoned aiodoned 28019 497162 0 0 3 0x14200 syncer update 6722 151277 0 0 3 0x14200 cleaner cleaner 71900 406343 0 0 3 0x14200 reaper reaper 75749 457302 0 0 3 0x14200 pgdaemon pagedaemon 23963 101972 0 0 3 0x14200 bored crynlk 53190 109141 0 0 3 0x14200 bored crypto 31195 443842 0 0 3 0x40014200 acpi0 acpi0 85894 66077 0 0 3 0x40014200 idle1 59893 505334 0 0 3 0x14200 bored softnet 57677 436492 0 0 3 0x14200 bored systqmp 77099 19813 0 0 3 0x14200 bored systq 94127 456385 0 0 3 0x40014200 bored softclock 28920 246034 0 0 3 0x40014200 idle0 1 288472 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 84269 (syz-executor.1) thread 0xffff800020e92288 (273502) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8269f760) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9518 6411K 6864K 78643K 11142 0 pcb 13 8K 8K 78643K 93 0 rtable 90 3K 3K 78643K 421 0 ifaddr 84 17K 17K 78643K 134 0 counters 43 33K 34K 78643K 59 0 ioctlops 0 0K 4K 78643K 1478 0 iov 0 0K 16K 78643K 48 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1415 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 38 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 370 0 sigio 0 0K 0K 78643K 3 0 proc 61 63K 95K 78643K 598 0 subproc 32 2K 2K 78643K 85 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 24 0 in_multi 72 3K 3K 78643K 143 0 ether_multi 1 0K 0K 78643K 12 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 273 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 123 55K 71K 78643K 2132 0 UVM aobj 14 2K 2K 78643K 14 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 55 0 NDP 12 0K 0K 78643K 31 0 temp 103 3039K 3103K 78643K 6129 0 kqueue 5 5K 9K 78643K 20 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 14 0 6 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 45 0 43 1 0 1 1 0 8 0 rtentry 112 90 0 55 2 0 2 2 0 8 0 unpcb 120 159 0 149 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpqe 32 692 0 692 1 1 0 1 0 8 0 tcpcb 544 121 0 117 1 0 1 1 0 8 0 inpcb 280 484 0 477 2 0 2 2 0 8 1 rttmr 72 2 0 2 1 1 0 1 0 8 0 nd6 48 16 0 12 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 3 0 3 2 1 1 1 0 482 1 pffrnode 88 3 0 3 2 1 1 1 0 8 1 pffrent 40 135 0 135 2 1 1 1 0 8 1 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 35 0 5 1 0 1 1 0 8 0 pfstkey 112 35 0 5 1 0 1 1 0 8 0 pfstate 328 35 0 5 3 0 3 3 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 256 359 0 217 12 2 10 12 0 8 0 art_table 32 360 0 217 2 0 2 2 0 8 0 art_node 16 89 0 60 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 36 0 26 1 0 1 1 0 8 0 shmpl 112 12 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1824 0 419 89 0 89 89 0 8 0 ffsino 272 1824 0 419 96 1 95 95 0 8 0 nchpl 144 2668 0 1075 60 0 60 60 0 8 0 uvmvnodes 72 2032 0 0 37 0 37 37 0 8 0 vnodes 208 2032 0 0 107 0 107 107 0 8 0 namei 1024 7345 0 7345 2 1 1 1 0 8 1 percpumem 16 40 0 8 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 scxspl 192 7310 0 7310 9 8 1 7 0 8 1 plimitpl 152 34 0 26 1 0 1 1 0 8 0 sigapl 424 577 0 545 4 0 4 4 0 8 0 futexpl 56 4952 0 4952 1 0 1 1 0 8 1 knotepl 112 119 0 100 1 0 1 1 0 8 0 kqueuepl 144 50 0 46 1 0 1 1 0 8 0 pipelkpl 48 119 0 109 1 0 1 1 0 8 0 pipepl 120 238 0 219 1 0 1 1 0 8 0 fdescpl 496 561 0 545 3 0 3 3 0 8 0 filepl 152 3270 0 3170 6 1 5 5 0 8 1 lockfpl 104 51 0 50 1 0 1 1 0 8 0 lockfspl 48 21 0 20 1 0 1 1 0 8 0 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 247 0 238 1 0 1 1 0 8 0 zombiepl 144 545 0 545 2 1 1 1 0 8 1 processpl 984 577 0 545 6 1 5 5 0 8 0 procpl 624 1222 0 1180 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 400 689 0 670 5 2 3 4 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 245 0 0 30 0 30 30 0 8 0 mtagpl 80 39 0 0 1 0 1 1 0 8 0 mbufpl 256 340 0 0 20 0 20 20 0 8 0 bufpl 280 4301 0 134 298 0 298 298 0 8 0 anonpl 16 73924 0 59400 69 9 60 68 0 124 1 amapchunkpl 152 4448 0 4316 23 3 20 20 0 158 14 amappl16 192 2577 0 1797 48 8 40 48 0 8 0 amappl15 184 11 0 9 1 0 1 1 0 8 0 amappl14 176 183 0 177 1 0 1 1 0 8 0 amappl13 168 49 0 46 1 0 1 1 0 8 0 amappl12 160 162 0 157 1 0 1 1 0 8 0 amappl11 152 77 0 61 1 0 1 1 0 8 0 amappl10 144 21 0 16 1 0 1 1 0 8 0 amappl9 136 388 0 387 1 0 1 1 0 8 0 amappl8 128 407 0 375 2 0 2 2 0 8 0 amappl7 120 160 0 145 1 0 1 1 0 8 0 amappl6 112 31 0 23 2 1 1 1 0 8 0 amappl5 104 284 0 269 1 0 1 1 0 8 0 amappl4 96 688 0 660 1 0 1 1 0 8 0 amappl3 88 271 0 264 1 0 1 1 0 8 0 amappl2 80 3338 0 3266 2 0 2 2 0 8 0 amappl1 72 22576 0 22137 23 13 10 18 0 8 0 amappl 80 1521 0 1476 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 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 565 0 545 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 565 0 545 1 0 1 1 0 8 0 vmmpekpl 168 7946 0 7912 2 0 2 2 0 8 0 vmmpepl 168 75699 0 73765 121 15 106 112 0 357 16 vmsppl 368 564 0 545 2 0 2 2 0 8 0 pdppl 4096 1138 0 1094 6 0 6 6 0 8 0 pvpl 32 225486 0 207788 169 14 155 166 0 265 11 pmappl 232 564 0 545 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 279 0 9 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d01,ffff800023f83c88,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f83ad0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e5de1a8,ffff800023f83c88,10,fffffd807f7bfa20) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8067016578,ffff800023f83c88,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e92288,f0,ffff800023f83c88,0,ffff800023f83d70) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e92288,ffff800023f83d20,ffff800023f83d70) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f83df0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f83df0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8bfb3e94a90, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020e00ff0) 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 end of kernel end trace frame: 0xc002774cd0, count: -3