uvm_fault(0xffffffff827df520, 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(0xffffffff827df520, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800023fdfca8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023fdfae0, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800023fdfca8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fdfaf0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e3881a8,ffff800023fdfca8,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066654dc0,ffff800023fdfca8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800023100508,f0,ffff800023fdfca8,0,ffff800023fdfd90) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800023100508,ffff800023fdfd40,ffff800023fdfd90) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fdfe10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fdfe10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4432198a0d0, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800023fdfa30 rbx 0xfffffd0000000000 rdx 0x153 rcx 0xffff800000adb8c0 rax 0xffffffff81428173 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x48c6583a0838b162 r11 0x42899fa6a5025f30 r12 0 r13 0x3da r14 0xffff800000af1e60 r15 0xffff800023fdfca8 rip 0xffffffff81428178 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023fdf9d0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=351812 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800023100c58,0xffffffff82915620 process=0xffff800020df0b98 user=0xffff800023fda000, vmspace=0xfffffd80643188b8 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 82521 503513 33130 0 7 0 syz-executor.1 82521 27657 33130 0 2 0x4000000 syz-executor.1 *82521 351812 33130 0 7 0x4000000 syz-executor.1 91018 265104 76672 0 2 0 syz-executor.0 91018 2903 76672 0 3 0x4000080 poll syz-executor.0 91018 361458 76672 0 2 0x4000000 syz-executor.0 76672 319554 48550 0 3 0x82 nanosleep syz-executor.0 86843 254669 0 0 3 0x14280 nfsidl nfsio 61976 74787 0 0 3 0x14280 nfsidl nfsio 34603 281972 0 0 3 0x14280 nfsidl nfsio 18542 182435 0 0 3 0x14280 nfsidl nfsio 73537 147485 0 0 3 0x14280 nfsidl nfsio 82279 421765 0 0 3 0x14280 nfsidl nfsio 12193 148036 0 0 3 0x14280 nfsidl nfsio 55024 370982 0 0 3 0x14280 nfsidl nfsio 3205 297894 0 0 3 0x14280 nfsidl nfsio 74467 261329 0 0 3 0x14280 nfsidl nfsio 97806 514702 0 0 3 0x14280 nfsidl nfsio 99474 401756 0 0 3 0x14280 nfsidl nfsio 23307 122937 0 0 3 0x14280 nfsidl nfsio 20858 390702 0 0 3 0x14280 nfsidl nfsio 62200 168849 0 0 3 0x14280 nfsidl nfsio 51285 302706 0 0 3 0x14280 nfsidl nfsio 98105 328883 0 0 3 0x14280 nfsidl nfsio 36281 163443 0 0 3 0x14280 nfsidl nfsio 40401 485411 0 0 3 0x14280 nfsidl nfsio 4809 260084 0 0 3 0x14280 nfsidl nfsio 95372 197764 0 0 3 0x14200 bored sosplice 33130 412480 48550 0 3 0x82 nanosleep syz-executor.1 48550 157995 23122 0 3 0x82 thrsleep syz-fuzzer 48550 300396 23122 0 3 0x4000082 thrsleep syz-fuzzer 48550 353203 23122 0 3 0x4000082 thrsleep syz-fuzzer 48550 405891 23122 0 3 0x4000082 thrsleep syz-fuzzer 48550 406469 23122 0 3 0x4000082 thrsleep syz-fuzzer 48550 489808 23122 0 3 0x4000082 thrsleep syz-fuzzer 48550 200411 23122 0 3 0x4000082 thrsleep syz-fuzzer 48550 39932 23122 0 3 0x4000082 thrsleep syz-fuzzer 48550 348825 23122 0 3 0x4000082 kqread syz-fuzzer 48550 450366 23122 0 3 0x4000082 thrsleep syz-fuzzer 23122 489109 26502 0 3 0x10008a pause ksh 26502 114409 35370 0 3 0x92 select sshd 19128 101710 1 0 3 0x100083 ttyin getty 35370 72223 1 0 3 0x80 select sshd 69858 221736 29165 74 3 0x100092 bpf pflogd 29165 475189 1 0 3 0x80 netio pflogd 56044 343818 1409 73 3 0x100090 kqread syslogd 1409 105037 1 0 3 0x100082 netio syslogd 96645 110444 1 77 3 0x100090 poll dhclient 96514 448137 1 0 3 0x80 poll dhclient 68787 307923 0 0 3 0x14200 bored smr 74592 59177 0 0 2 0x14200 zerothread 409 331366 0 0 3 0x14200 aiodoned aiodoned 21042 79383 0 0 3 0x14200 syncer update 31846 247735 0 0 3 0x14200 cleaner cleaner 69725 345594 0 0 3 0x14200 reaper reaper 41472 53738 0 0 3 0x14200 pgdaemon pagedaemon 96548 274734 0 0 3 0x14200 bored crynlk 59433 6908 0 0 3 0x14200 bored crypto 8595 92043 0 0 3 0x40014200 acpi0 acpi0 56072 488925 0 0 3 0x40014200 idle1 65067 284799 0 0 3 0x14200 bored softnet 91230 424559 0 0 3 0x14200 bored systqmp 71111 498924 0 0 3 0x14200 bored systq 64335 290905 0 0 3 0x40014200 bored softclock 67199 489588 0 0 3 0x40014200 idle0 1 442453 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 82521 (syz-executor.1) thread 0xffff800023100508 (351812) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82910c50) #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 9543 6425K 6814K 78643K 11672 0 pcb 13 8K 8K 78643K 154 0 rtable 135 19K 20K 78643K 617 0 ifaddr 111 22K 23K 78643K 231 0 sysctl 2 0K 0K 78643K 2 0 counters 43 33K 34K 78643K 71 0 ioctlops 0 0K 4K 78643K 1611 0 iov 0 0K 16K 78643K 116 0 mount 1 1K 1K 78643K 1 0 vnodes 1214 76K 77K 78643K 1616 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 12 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 30 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 870 0 sigio 0 0K 0K 78643K 20 0 proc 62 63K 95K 78643K 584 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 71 0 in_multi 96 4K 4K 78643K 251 0 ether_multi 1 0K 0K 78643K 18 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 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 309 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 149 121K 121K 78643K 3953 0 UVM aobj 33 2K 2K 78643K 43 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 4 0K 1K 78643K 1566 0 NDP 15 0K 0K 78643K 51 0 temp 130 3865K 3933K 78643K 14591 0 kqueue 3 4K 14K 78643K 51 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 14 0 8 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 85 0 83 1 0 1 1 0 8 0 rtentry 112 104 0 65 2 0 2 2 0 8 0 unpcb 120 380 0 370 1 0 1 1 0 8 0 syncache 264 7 0 7 3 2 1 1 0 8 1 tcpqe 32 84 0 84 2 2 0 1 0 8 0 tcpcb 544 1487 0 1481 3 1 2 2 0 8 1 inpcb 296 2960 0 2946 4 1 3 3 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 29 0 27 1 0 1 1 0 8 0 pkpcb 40 8 0 8 3 2 1 1 0 8 1 ppxss 1128 6 0 6 4 3 1 1 0 8 1 pffrag 232 3 0 2 2 1 1 1 0 482 0 pffrnode 88 3 0 2 2 1 1 1 0 8 0 pffrent 40 92 0 91 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 56 0 41 3 1 2 2 0 8 0 pfstitem 24 24 0 16 1 0 1 1 0 8 0 pfstkey 112 25 0 17 1 0 1 1 0 8 0 pfstate 328 25 0 17 2 0 2 2 0 8 0 pfsrctr 152 43 0 39 2 1 1 1 0 8 0 pfrule 1360 43 0 26 3 1 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 351 0 184 13 1 12 13 0 8 0 art_table 32 353 0 184 2 0 2 2 0 8 0 art_node 16 103 0 66 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 13 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 26 0 16 1 0 1 1 0 8 0 shmpl 112 41 0 10 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2533 0 1132 90 2 88 89 0 8 0 ffsino 272 2533 0 1132 94 0 94 94 0 8 0 nchpl 144 3849 0 2250 60 0 60 60 0 8 0 uvmvnodes 72 2858 0 0 52 0 52 52 0 8 0 vnodes 208 2858 0 0 151 0 151 151 0 8 0 namei 1024 10924 0 10924 2 1 1 1 0 8 1 percpumem 16 46 0 14 1 0 1 1 0 8 0 vcpupl 1984 10 0 0 2 0 2 2 0 8 0 vmpool 560 18 0 8 1 0 1 1 0 8 0 pfiaddrpl 120 19 0 8 1 0 1 1 0 8 0 scxspl 192 12674 0 12674 13 12 1 7 0 8 1 plimitpl 152 67 0 59 1 0 1 1 0 8 0 sigapl 424 1100 0 1047 6 0 6 6 0 8 0 futexpl 56 15086 0 15086 2 1 1 1 0 8 1 knotepl 112 179 0 160 2 1 1 2 0 8 0 kqueuepl 144 133 0 131 1 0 1 1 0 8 0 pipelkpl 48 186 0 175 1 0 1 1 0 8 0 pipepl 120 372 0 351 1 0 1 1 0 8 0 fdescpl 496 1064 0 1047 3 0 3 3 0 8 0 filepl 152 7556 0 7452 6 0 6 6 0 8 2 lockfpl 104 190 0 189 1 0 1 1 0 8 0 lockfspl 48 68 0 67 1 0 1 1 0 8 0 sessionpl 112 20 0 9 1 0 1 1 0 8 0 pgrppl 48 32 0 21 1 0 1 1 0 8 0 ucredpl 96 797 0 788 1 0 1 1 0 8 0 zombiepl 144 1047 0 1047 1 0 1 1 0 8 1 processpl 984 1100 0 1047 7 0 7 7 0 8 0 procpl 624 3064 0 2998 6 0 6 6 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 10 0 10 4 3 1 1 0 8 1 sockpl 400 3439 0 3413 8 3 5 5 0 8 1 mcl64k 65536 5 0 0 1 0 1 1 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 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 11 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 164 0 0 20 0 20 20 0 8 0 mtagpl 96 52 0 0 2 0 2 2 0 8 0 mbufpl 256 315 0 0 18 0 18 18 0 8 0 bufpl 280 5776 0 142 403 0 403 403 0 8 0 anonpl 16 115470 0 99598 87 16 71 85 0 124 0 amapchunkpl 152 6448 0 6283 18 10 8 14 0 158 1 amappl16 192 4878 0 3980 62 16 46 57 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 368 0 362 1 0 1 1 0 8 0 amappl13 168 50 0 46 1 0 1 1 0 8 0 amappl12 160 343 0 339 1 0 1 1 0 8 0 amappl11 152 64 0 49 1 0 1 1 0 8 0 amappl10 144 416 0 409 1 0 1 1 0 8 0 amappl9 136 459 0 455 1 0 1 1 0 8 0 amappl8 128 479 0 437 2 0 2 2 0 8 0 amappl7 120 530 0 516 1 0 1 1 0 8 0 amappl6 112 25 0 20 2 1 1 1 0 8 0 amappl5 104 956 0 938 1 0 1 1 0 8 0 amappl4 96 522 0 493 1 0 1 1 0 8 0 amappl3 88 137 0 132 1 0 1 1 0 8 0 amappl2 80 7802 0 7717 2 0 2 2 0 8 0 amappl1 72 33073 0 32592 23 13 10 18 0 8 0 amappl 80 3338 0 3283 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 42 0 10 1 0 1 1 0 8 0 uaddrrnd 24 1082 0 1055 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1082 0 1055 1 0 1 1 0 8 0 vmmpekpl 168 11463 0 11417 3 0 3 3 0 8 0 vmmpepl 168 136727 0 134509 170 46 124 126 0 357 27 vmsppl 368 1081 0 1055 4 1 3 3 0 8 0 pdppl 4096 2171 0 2120 9 2 7 7 0 8 0 pvpl 32 343741 0 324548 203 31 172 199 0 265 6 pmappl 232 1081 0 1055 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 282 0 14 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(ffffffff82714ff0) 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: 0x7f7ffffdfec0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800023fdfca8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fdfaf0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e3881a8,ffff800023fdfca8,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066654dc0,ffff800023fdfca8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800023100508,f0,ffff800023fdfca8,0,ffff800023fdfd90) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800023100508,ffff800023fdfd40,ffff800023fdfd90) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fdfe10) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fdfe10) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4432198a0d0, count: -8