uvm_fault(0xffffffff82798bb0, 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(0xffffffff82798bb0, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800023f2f8c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023f2f700, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800023f2f8c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f2f710) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e77a688,ffff800023f2f8c8,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806696ead0,ffff800023f2f8c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e19ae8,f0,ffff800023f2f8c8,0,ffff800023f2f9b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e19ae8,ffff800023f2f960,ffff800023f2f9b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f2fa30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f2fa30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd0173784c50, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800023f2f650 rbx 0xfffffd0000000000 rdx 0x2b7 rcx 0xffff800000ad8a00 rax 0xffffffff81944c53 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xe0b63d2f29e12973 r11 0xbba39890a506a0f6 r12 0 r13 0x3da r14 0xffff800000af3660 r15 0xffff800023f2f8c8 rip 0xffffffff81944c58 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023f2f5f0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=182365 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e19608,0xffffffff8290d2f8 process=0xffff800020e13370 user=0xffff800023f2a000, vmspace=0xfffffd806e907e68 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74023 250704 12271 0 7 0 syz-executor.1 *74023 182365 12271 0 7 0x4000000 syz-executor.1 11501 23886 0 0 3 0x14280 nfsidl nfsio 34817 293866 0 0 3 0x14280 nfsidl nfsio 42410 346507 0 0 3 0x14280 nfsidl nfsio 50606 447185 0 0 3 0x14280 nfsidl nfsio 11952 279243 0 0 3 0x14280 nfsidl nfsio 64369 153995 0 0 3 0x14280 nfsidl nfsio 18036 472986 0 0 3 0x14280 nfsidl nfsio 61225 401982 0 0 3 0x14280 nfsidl nfsio 18015 459776 0 0 3 0x14280 nfsidl nfsio 33627 50445 0 0 3 0x14280 nfsidl nfsio 55539 302312 0 0 3 0x14280 nfsidl nfsio 36996 19020 0 0 3 0x14280 nfsidl nfsio 73669 352753 0 0 3 0x14280 nfsidl nfsio 45527 504062 0 0 3 0x14280 nfsidl nfsio 44751 183170 0 0 3 0x14280 nfsidl nfsio 97742 190243 0 0 3 0x14280 nfsidl nfsio 35532 280005 0 0 3 0x14280 nfsidl nfsio 6878 102882 0 0 3 0x14280 nfsidl nfsio 30151 522281 0 0 3 0x14280 nfsidl nfsio 53043 371222 0 0 3 0x14280 nfsidl nfsio 80824 210028 0 0 3 0x14200 bored sosplice 12271 434652 2133 0 3 0x82 nanosleep syz-executor.1 42930 79729 2133 0 3 0x82 nanosleep syz-executor.0 2133 407819 99269 0 3 0x82 kqread syz-fuzzer 2133 324569 99269 0 3 0x4000082 thrsleep syz-fuzzer 2133 283173 99269 0 3 0x4000082 thrsleep syz-fuzzer 2133 6348 99269 0 3 0x4000082 thrsleep syz-fuzzer 2133 231817 99269 0 3 0x4000082 thrsleep syz-fuzzer 2133 146858 99269 0 3 0x4000082 thrsleep syz-fuzzer 2133 64056 99269 0 3 0x4000082 thrsleep syz-fuzzer 2133 497873 99269 0 3 0x4000082 thrsleep syz-fuzzer 2133 490554 99269 0 3 0x4000082 thrsleep syz-fuzzer 2133 45618 99269 0 3 0x4000082 thrsleep syz-fuzzer 99269 40796 96178 0 3 0x10008a pause ksh 96178 203165 23286 0 3 0x92 select sshd 7136 299428 1 0 3 0x100083 ttyin getty 23286 381640 1 0 3 0x80 select sshd 32919 144915 40618 74 3 0x100092 bpf pflogd 40618 224059 1 0 3 0x80 netio pflogd 67493 502889 9941 73 3 0x100010 biowait syslogd 9941 50262 1 0 3 0x100082 netio syslogd 62210 90622 1 77 3 0x100090 poll dhclient 67066 72652 1 0 3 0x80 poll dhclient 39497 477828 0 0 3 0x14200 bored smr 56629 392136 0 0 2 0x14200 zerothread 39990 41893 0 0 3 0x14200 aiodoned aiodoned 56994 428935 0 0 3 0x14200 syncer update 62600 53297 0 0 3 0x14200 cleaner cleaner 17707 188290 0 0 3 0x14200 reaper reaper 9286 314918 0 0 3 0x14200 pgdaemon pagedaemon 42362 131494 0 0 3 0x14200 bored crynlk 85160 409028 0 0 3 0x14200 bored crypto 13729 485342 0 0 3 0x40014200 acpi0 acpi0 98934 334835 0 0 3 0x40014200 idle1 64539 135268 0 0 3 0x14200 bored softnet 29439 12408 0 0 3 0x14200 bored systqmp 60000 126013 0 0 3 0x14200 bored systq 90370 474746 0 0 3 0x40014200 bored softclock 25060 213663 0 0 3 0x40014200 idle0 1 192397 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 74023 (syz-executor.1) thread 0xffff800020e19ae8 (182365) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828b6e58) #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 Process 67493 (syslogd) thread 0xffff800020e51120 (502889) exclusive rrwlock inode r = 0 (0xfffffd806ed42c48) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 sys_fsync+0x113 sys/kern/vfs_syscalls.c:2874 #6 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9535 6431K 6814K 78643K 12347 0 pcb 13 8K 8K 78643K 47 0 rtable 127 7K 7K 78643K 368 0 ifaddr 90 18K 18K 78643K 145 0 counters 43 33K 34K 78643K 55 0 ioctlops 0 0K 8K 78643K 2811 0 iov 0 0K 12K 78643K 44 0 mount 1 1K 1K 78643K 1 0 vnodes 1229 77K 78K 78643K 2015 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 68 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 1141 0 sigio 0 0K 0K 78643K 100 0 proc 62 63K 95K 78643K 475 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 637 0 in_multi 74 3K 4K 78643K 136 0 ether_multi 1 0K 0K 78643K 6 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 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 237 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 141 56K 56K 78643K 4216 0 UVM aobj 20 2K 3K 78643K 23 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 13 0 NDP 13 0K 0K 78643K 25 0 temp 125 3855K 3943K 78643K 7699 0 kqueue 3 4K 12K 78643K 18 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 31 0 29 1 0 1 1 0 8 0 rtentry 112 56 0 9 2 0 2 2 0 8 0 unpcb 120 785 0 775 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 1577 0 1577 3 3 0 1 0 8 0 tcpcb 544 902 0 897 1 0 1 1 0 8 0 inpcb 280 1052 0 1040 2 0 2 2 0 8 0 rttmr 72 2 0 2 2 2 0 1 0 8 0 nd6 48 8 0 2 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 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 19 0 14 1 0 1 1 0 8 0 pfstitem 24 37 0 9 1 0 1 1 0 8 0 pfstkey 112 37 0 9 1 0 1 1 0 8 0 pfstate 328 37 0 9 3 0 3 3 0 8 0 pfrule 1360 447 0 21 37 1 36 36 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 202 0 2 13 0 13 13 0 8 0 art_table 32 203 0 2 2 0 2 2 0 8 0 art_node 16 55 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 19 1 0 1 1 0 8 0 semapl 112 64 0 54 1 0 1 1 0 8 0 shmpl 112 21 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2665 0 1262 89 0 89 89 0 8 0 ffsino 272 2665 0 1262 96 2 94 95 0 8 0 nchpl 144 4497 0 2898 60 0 60 60 0 8 0 uvmvnodes 72 3456 0 0 63 0 63 63 0 8 0 vnodes 208 3456 0 0 182 0 182 182 0 8 0 namei 1024 13260 0 13260 2 1 1 1 0 8 1 percpumem 16 38 0 6 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 8 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 4 0 4 1 1 0 1 0 8 0 scxspl 192 13360 0 13359 8 7 1 7 0 8 0 plimitpl 152 35 0 27 1 0 1 1 0 8 0 sigapl 424 1377 0 1325 6 0 6 6 0 8 0 futexpl 56 14375 0 14375 1 0 1 1 0 8 1 knotepl 112 77 0 58 1 0 1 1 0 8 0 kqueuepl 144 86 0 82 1 0 1 1 0 8 0 pipelkpl 48 124 0 114 1 0 1 1 0 8 0 pipepl 120 248 0 229 1 0 1 1 0 8 0 fdescpl 496 1341 0 1325 3 0 3 3 0 8 0 filepl 152 8119 0 8019 6 1 5 5 0 8 1 lockfpl 104 90 0 89 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 96 553 0 542 1 0 1 1 0 8 0 zombiepl 144 1325 0 1324 2 1 1 1 0 8 0 processpl 984 1377 0 1324 8 1 7 7 0 8 0 procpl 624 3444 0 3381 6 0 6 6 0 8 1 sosppl 128 4 0 4 2 2 0 1 0 8 0 sockpl 400 1870 0 1850 5 2 3 4 0 8 0 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 12 0 0 2 0 2 2 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 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 288 0 0 35 0 35 35 0 8 0 mtagpl 80 21 0 0 1 0 1 1 0 8 0 mbufpl 256 291 0 0 18 0 18 18 0 8 0 bufpl 280 4749 0 134 330 0 330 330 0 8 0 anonpl 16 110924 0 94499 85 6 79 84 0 124 12 amapchunkpl 152 6408 0 6251 8 1 7 8 0 158 0 amappl16 192 6416 0 5526 57 9 48 57 0 8 3 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 22 0 18 1 0 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 9 0 6 1 0 1 1 0 8 0 amappl11 152 54 0 38 1 0 1 1 0 8 0 amappl10 144 580 0 572 1 0 1 1 0 8 0 amappl9 136 388 0 387 1 0 1 1 0 8 0 amappl8 128 369 0 331 2 0 2 2 0 8 0 amappl7 120 688 0 673 1 0 1 1 0 8 0 amappl6 112 26 0 22 1 0 1 1 0 8 0 amappl5 104 1233 0 1217 1 0 1 1 0 8 0 amappl4 96 494 0 464 1 0 1 1 0 8 0 amappl3 88 142 0 136 1 0 1 1 0 8 0 amappl2 80 9787 0 9715 2 0 2 2 0 8 0 amappl1 72 36126 0 35683 23 13 10 18 0 8 0 amappl 80 3681 0 3634 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 22 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1349 0 1329 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1349 0 1329 1 0 1 1 0 8 0 vmmpekpl 168 13893 0 13856 2 0 2 2 0 8 0 vmmpepl 168 163001 0 160935 117 21 96 113 0 357 2 vmsppl 368 1348 0 1329 2 0 2 2 0 8 0 pdppl 4096 2705 0 2662 7 1 6 6 0 8 0 pvpl 32 352610 0 333269 195 5 190 195 0 265 32 pmappl 232 1348 0 1329 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 323 0 9 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(ffffffff8270eff0) 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(ffffffff828b6c50) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff828b6c50) at __mp_lock+0x127 sys/kern/kern_lock.c:147 intr_handler(ffff800023109830,ffff80000004a400) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x19f end of kernel end trace frame: 0x7f7ffffbd2e0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800023f2f8c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f2f710) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e77a688,ffff800023f2f8c8,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806696ead0,ffff800023f2f8c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e19ae8,f0,ffff800023f2f8c8,0,ffff800023f2f9b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e19ae8,ffff800023f2f960,ffff800023f2f9b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f2fa30) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f2fa30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd0173784c50, count: -8