uvm_fault(0xffffffff825e4988, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x2ab: movl 0x18(%r14),%r15d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xffffffff825e4988, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(ffff800000a1d800,ffff800020a9f978,10) at tun_dev_read+0x2ab sys/net/if_tun.c:834 end trace frame: 0xffff800020a9f7b0, count: 0 ddb{0}> trace tun_dev_read(ffff800000a1d800,ffff800020a9f978,10) at tun_dev_read+0x2ab sys/net/if_tun.c:834 spec_read(ffff800020a9f7c0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806ebe91a8,ffff800020a9f978,10,fffffd807f7be900) at VOP_READ+0xbf sys/kern/vfs_vops.c:248 vn_read(fffffd80663bda30,ffff800020a9f978,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ac9160,f0,ffff800020a9f978,0,ffff800020a9fa60) at dofilereadv+0x1a2 sys/kern/sys_generic.c:236 sys_read(ffff800020ac9160,ffff800020a9fa10,ffff800020a9fa60) at sys_read+0x83 sys/kern/sys_generic.c:156 syscall(ffff800020a9fae0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020a9fae0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcba967ce470, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800020a9f700 rbx 0x3da rdx 0x20f rcx 0xffff8000009d38c0 rax 0xffffffff811d5c81 tun_dev_read+0x2a1 r8 0x7f7fffffc000 r9 0x5 r10 0xb0ffc5f6ec8d3a77 r11 0x34fd49234013c001 r12 0xffff800020a9f978 r13 0x10 r14 0xfffffd0000000000 r15 0 rip 0xffffffff811d5c8b tun_dev_read+0x2ab cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800020a9f690 ss 0x10 tun_dev_read+0x2ab: movl 0x18(%r14),%r15d ddb{0}> show proc PROC (syz-executor.1) pid=422804 stat=onproc flags process=0 proc=4000000 pri=78, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac9b40,0xffff800020ac8ef8 process=0xffff800020af5500 user=0xffff800020a9a000, vmspace=0xfffffd807f0002e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75882 3024 89672 0 7 0 syz-executor.1 *75882 422804 89672 0 7 0x4000000 syz-executor.1 75882 224486 89672 0 3 0x4000080 fsleep syz-executor.1 94729 296946 65518 0 2 0x2 syz-executor.0 63333 245845 0 0 3 0x14200 bored sosplice 89672 462155 65518 0 2 0x482 syz-executor.1 65518 335655 97841 0 3 0x82 thrsleep syz-fuzzer 65518 472676 97841 0 2 0x4000482 syz-fuzzer 65518 354035 97841 0 3 0x4000082 kqread syz-fuzzer 65518 43498 97841 0 3 0x4000082 thrsleep syz-fuzzer 65518 42548 97841 0 3 0x4000082 thrsleep syz-fuzzer 65518 300984 97841 0 3 0x4000082 thrsleep syz-fuzzer 65518 489166 97841 0 3 0x4000082 thrsleep syz-fuzzer 65518 503436 97841 0 3 0x4000082 thrsleep syz-fuzzer 65518 95121 97841 0 3 0x4000082 thrsleep syz-fuzzer 65518 478907 97841 0 2 0x4000482 syz-fuzzer 97841 30247 69456 0 3 0x10008a pause ksh 69456 228011 78077 0 3 0x92 select sshd 50936 151452 1 0 3 0x100083 ttyopn getty 78077 476569 1 0 3 0x80 select sshd 41141 37513 4550 74 3 0x100092 bpf pflogd 4550 85546 1 0 3 0x80 netio pflogd 91661 17244 91846 73 3 0x100090 kqread syslogd 91846 112572 1 0 3 0x100082 netio syslogd 15753 478036 0 0 2 0x14200 zerothread 25601 335587 0 0 3 0x14200 aiodoned aiodoned 65194 142002 0 0 3 0x14200 syncer update 94639 68811 0 0 3 0x14200 cleaner cleaner 44904 343917 0 0 3 0x14200 reaper reaper 24331 463218 0 0 3 0x14200 pgdaemon pagedaemon 88302 324959 0 0 3 0x14200 bored crynlk 580 208055 0 0 3 0x14200 bored crypto 24949 415350 0 0 3 0x40014200 acpi0 acpi0 71723 359175 0 0 3 0x40014200 idle1 37669 26540 0 0 3 0x14200 bored softnet 77866 479717 0 0 3 0x14200 bored systqmp 15285 90894 0 0 3 0x14200 bored systq 16969 457732 0 0 3 0x40014200 bored softclock 7361 369308 0 0 3 0x40014200 idle0 737 416036 0 0 3 0x14200 bored smr 1 310725 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 75882 (syz-executor.1) thread 0xffff800020ac9160 (422804) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8261c038) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 vn_read+0x45 sys/kern/vfs_vnops.c:357 #2 dofilereadv+0x1a2 sys/kern/sys_generic.c:236 #3 sys_read+0x83 sys/kern/sys_generic.c:156 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #5 Xsyscall+0x128 Process 94729 (syz-executor.0) thread 0xffff800020ac89f8 (296946) exclusive rrwlock inode r = 0 (0xfffffd8066b0dd60) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2974 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8066b0db40) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:453 #3 VOP_LOCK+0xf9 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2959 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9544 6370K 7770K 78643K 11319 0 pcb 13 8K 8K 78643K 65 0 rtable 119 13K 13K 78643K 308 0 ifaddr 89 16K 17K 78643K 178 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1491 0 iov 0 0K 16K 78643K 54 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1478 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 57 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 415 0 sigio 0 0K 0K 78643K 2 0 proc 56 51K 83K 78643K 567 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 1K 78643K 69 0 in_multi 76 4K 4K 78643K 116 0 ether_multi 1 0K 0K 78643K 6 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 115 519K 519K 78643K 115 0 exec 0 0K 1K 78643K 272 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 116 70K 71K 78643K 2300 0 UVM aobj 42 7K 7K 78643K 47 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 32 0 NDP 15 0K 0K 78643K 38 0 temp 145 3023K 3090K 78643K 13647 0 kqueue 3 4K 16K 78643K 62 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 11 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 47 0 47 1 0 1 1 0 8 1 rtentry 112 72 0 27 2 0 2 2 0 8 0 unpcb 120 277 0 269 1 0 1 1 0 8 0 syncache 264 7 0 7 2 2 0 1 0 8 0 tcpqe 32 17 0 17 2 2 0 1 0 8 0 tcpcb 544 151 0 147 1 0 1 1 0 8 0 inpcb 280 516 0 512 2 1 1 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 ip6q 72 3 0 3 1 1 0 1 0 8 0 ip6af 40 9 0 9 1 1 0 1 0 8 0 nd6 48 9 0 5 1 0 1 1 0 8 0 ppxss 1128 10 0 10 2 1 1 1 0 8 1 pffrag 232 10 0 10 3 2 1 1 0 482 1 pffrnode 88 10 0 10 3 2 1 1 0 8 1 pffrent 40 239 0 239 3 2 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 57 0 8 1 0 1 1 0 8 0 pfstkey 112 57 0 8 2 0 2 2 0 8 0 pfstate 328 57 0 8 5 0 5 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 352 0 131 14 0 14 14 0 8 0 art_table 32 354 0 131 2 0 2 2 0 8 0 art_node 16 71 0 30 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 2 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 55 0 45 1 0 1 1 0 8 0 shmpl 112 45 0 5 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1963 0 557 46 0 46 46 0 8 0 ffsino 272 1963 0 557 95 0 95 95 0 8 0 nchpl 144 2710 0 1104 61 0 61 61 0 8 0 uvmvnodes 72 2206 0 0 41 0 41 41 0 8 0 vnodes 208 2206 0 0 117 0 117 117 0 8 0 namei 1024 8230 0 8229 1 0 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 560 3 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 2 1 1 1 0 8 1 scxspl 192 8383 0 8383 8 6 2 6 0 8 2 plimitpl 152 44 0 37 1 0 1 1 0 8 0 sigapl 432 608 0 595 3 1 2 3 0 8 0 futexpl 56 6897 0 6896 1 0 1 1 0 8 0 knotepl 112 151 0 132 1 0 1 1 0 8 0 kqueuepl 104 138 0 136 1 0 1 1 0 8 0 pipelkpl 48 145 0 135 1 0 1 1 0 8 0 pipepl 120 290 0 271 1 0 1 1 0 8 0 fdescpl 496 609 0 595 3 0 3 3 0 8 0 filepl 152 4154 0 4064 7 2 5 7 0 8 1 lockfpl 104 140 0 140 1 0 1 1 0 8 1 lockfspl 48 47 0 47 1 0 1 1 0 8 1 sessionpl 112 20 0 11 1 0 1 1 0 8 0 pgrppl 48 20 0 11 1 0 1 1 0 8 0 ucredpl 96 370 0 362 1 0 1 1 0 8 0 zombiepl 144 595 0 595 1 0 1 1 0 8 1 processpl 896 625 0 595 4 0 4 4 0 8 0 procpl 632 1423 0 1382 5 1 4 5 0 8 0 srpgc 64 4 0 4 2 1 1 1 0 8 1 sosppl 128 5 0 5 2 1 1 1 0 8 1 sockpl 400 847 0 835 5 2 3 5 0 8 1 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 156 0 0 19 0 19 19 0 8 0 mtagpl 80 32 0 0 1 0 1 1 0 8 0 mbufpl 256 296 0 0 18 0 18 18 0 8 0 bufpl 280 7553 0 1348 444 0 444 444 0 8 0 anonpl 16 77766 0 64345 79 12 67 78 0 125 2 amapchunkpl 152 3479 0 3346 12 2 10 10 0 158 2 amappl16 192 2824 0 1957 60 8 52 54 0 8 7 amappl15 184 379 0 371 1 0 1 1 0 8 0 amappl14 176 143 0 139 1 0 1 1 0 8 0 amappl12 160 2 0 2 1 1 0 1 0 8 0 amappl11 152 65 0 57 1 0 1 1 0 8 0 amappl10 144 24 0 18 1 0 1 1 0 8 0 amappl9 136 727 0 724 1 0 1 1 0 8 0 amappl8 128 229 0 210 1 0 1 1 0 8 0 amappl7 120 116 0 103 1 0 1 1 0 8 0 amappl6 112 59 0 51 1 0 1 1 0 8 0 amappl5 104 151 0 137 1 0 1 1 0 8 0 amappl4 96 817 0 790 1 0 1 1 0 8 0 amappl3 88 229 0 222 1 0 1 1 0 8 0 amappl2 80 4023 0 3954 3 1 2 3 0 8 0 amappl1 72 23336 0 22905 25 15 10 20 0 8 0 amappl 80 1709 0 1664 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 46 0 5 1 0 1 1 0 8 0 uaddrrnd 24 612 0 595 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 612 0 595 1 0 1 1 0 8 0 vmmpekpl 168 8506 0 8473 2 0 2 2 0 8 0 vmmpepl 168 82492 0 80515 143 12 131 131 0 357 40 vmsppl 368 611 0 595 2 0 2 2 0 8 0 pdppl 4096 1231 0 1193 6 0 6 6 0 8 1 pvpl 32 235404 0 218867 186 11 175 186 0 265 18 pmappl 232 611 0 595 3 1 2 2 0 8 1 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 176 0 5 5 0 5 5 0 8 0