uvm_fault(0xfffffd807f0002e0, 0xc0026ed7b8, 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(0xfffffd807f0002e0, 0xc0026ed7b8, 0, 1) -> e tun_dev_read(5d01,ffff800023fa4f38,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023fa4d70, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800023fa4f38,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fa4d80) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e4590d8,ffff800023fa4f38,10,fffffd807f7bf6c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806724fbf8,ffff800023fa4f38,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed8018,f0,ffff800023fa4f38,0,ffff800023fa5020) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed8018,ffff800023fa4fd0,ffff800023fa5020) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fa50a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fa50a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc87e1fcb000, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800023fa4cc0 rbx 0xc0026ed7a0 rdx 0x154 rcx 0xffff8000009d9740 rax 0xffffffff8153a2c3 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x31ea3e3dd4f150e4 r11 0x365c0b109355c826 r12 0 r13 0x3da r14 0xffff800000a29660 r15 0xffff800023fa4f38 rip 0xffffffff8153a2c8 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023fa4c60 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=348050 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff800020ed8c48,0xffffffff82658448 process=0xffff800020ecebb0 user=0xffff800023fa0000, vmspace=0xfffffd807f0002e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29407 362501 97166 0 7 0 syz-executor.1 *29407 348050 97166 0 7 0x4000000 syz-executor.1 16178 459603 0 0 3 0x14200 bored sosplice 93272 293833 1 0 3 0x100083 ttyin getty 97166 141447 95034 0 3 0x82 nanosleep syz-executor.1 95034 41778 17477 0 3 0x82 thrsleep syz-fuzzer 95034 3229 17477 0 3 0x4000082 nanosleep syz-fuzzer 95034 487816 17477 0 3 0x4000082 thrsleep syz-fuzzer 95034 512103 17477 0 3 0x4000082 thrsleep syz-fuzzer 95034 296050 17477 0 3 0x4000082 thrsleep syz-fuzzer 95034 287154 17477 0 3 0x4000082 thrsleep syz-fuzzer 95034 27724 17477 0 3 0x4000082 thrsleep syz-fuzzer 95034 403933 17477 0 3 0x4000082 thrsleep syz-fuzzer 95034 392144 17477 0 3 0x4000082 thrsleep syz-fuzzer 95034 114510 17477 0 3 0x4000082 kqread syz-fuzzer 17477 392997 7837 0 3 0x10008a pause ksh 7837 120766 74653 0 3 0x92 select sshd 74653 246225 1 0 3 0x80 select sshd 38078 198956 97595 74 3 0x100092 bpf pflogd 97595 160231 1 0 3 0x80 netio pflogd 5369 520054 88957 73 3 0x100090 kqread syslogd 88957 23999 1 0 3 0x100082 netio syslogd 45179 324647 1 77 3 0x100090 poll dhclient 77878 368816 1 0 3 0x80 poll dhclient 60953 17824 0 0 3 0x14200 bored smr 22725 290271 0 0 3 0x14200 pgzero zerothread 78760 289256 0 0 3 0x14200 aiodoned aiodoned 49284 142150 0 0 3 0x14200 syncer update 14105 283919 0 0 3 0x14200 cleaner cleaner 46564 502543 0 0 3 0x14200 reaper reaper 45167 182224 0 0 3 0x14200 pgdaemon pagedaemon 69181 233690 0 0 3 0x14200 bored crynlk 14123 162806 0 0 3 0x14200 bored crypto 15006 214177 0 0 3 0x40014200 acpi0 acpi0 79073 150033 0 0 3 0x40014200 idle1 53004 238919 0 0 3 0x14200 bored softnet 55974 511379 0 0 3 0x14200 bored systqmp 97110 181110 0 0 3 0x14200 bored systq 58614 234075 0 0 3 0x40014200 bored softclock 44366 415333 0 0 3 0x40014200 idle0 1 450719 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 29407 (syz-executor.1) thread 0xffff800020ed8018 (348050) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8268a7c8) #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 9510 6427K 6798K 78643K 11131 0 pcb 13 8K 8K 78643K 109 0 rtable 86 11K 11K 78643K 379 0 ifaddr 63 13K 15K 78643K 133 0 counters 41 33K 34K 78643K 59 0 ioctlops 0 0K 4K 78643K 1500 0 iov 0 0K 32K 78643K 42 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1405 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 86 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1823 197K 290K 78643K 12980 0 file desc 4 9K 25K 78643K 437 0 sigio 0 0K 0K 78643K 5 0 proc 61 63K 83K 78643K 550 0 subproc 16 1K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 50 0 in_multi 65 3K 3K 78643K 136 0 ether_multi 1 0K 0K 78643K 14 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 269 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 127 47K 56K 78643K 2409 0 UVM aobj 16 2K 2K 78643K 16 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 78 0 NDP 10 0K 0K 78643K 29 0 temp 81 3038K 3108K 78643K 15384 0 kqueue 3 4K 18K 78643K 26 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 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 62 0 60 1 0 1 1 0 8 0 rtentry 112 76 0 43 2 0 2 2 0 8 0 unpcb 120 703 0 693 1 0 1 1 0 8 0 syncache 264 14 0 14 3 3 0 1 0 8 0 tcpqe 32 12 0 12 2 2 0 1 0 8 0 tcpcb 544 172 0 168 1 0 1 1 0 8 0 inpcb 280 521 0 514 4 2 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 13 0 10 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 pffrag 232 2 0 1 2 1 1 1 0 482 0 pffrnode 88 2 0 1 2 1 1 1 0 8 0 pffrent 40 47 0 46 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 pfstitem 24 54 0 15 1 0 1 1 0 8 0 pfstkey 112 54 0 15 2 0 2 2 0 8 0 pfstate 328 54 0 15 4 0 4 4 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 256 340 0 197 14 1 13 13 0 8 3 art_table 32 341 0 197 2 0 2 2 0 8 0 art_node 16 75 0 45 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 10 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 84 0 74 1 0 1 1 0 8 0 shmpl 112 14 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1963 0 563 90 1 89 89 0 8 0 ffsino 272 1963 0 563 94 0 94 94 0 8 0 nchpl 144 2708 0 1121 60 0 60 60 0 8 0 uvmvnodes 72 2133 0 0 39 0 39 39 0 8 0 vnodes 208 2133 0 0 113 0 113 113 0 8 0 namei 1024 7513 0 7513 2 1 1 1 0 8 1 percpumem 16 40 0 9 1 0 1 1 0 8 0 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 560 6 0 3 1 0 1 1 0 8 0 scxspl 192 7534 0 7534 10 9 1 7 0 8 1 plimitpl 152 47 0 40 1 0 1 1 0 8 0 sigapl 424 651 0 620 4 0 4 4 0 8 0 futexpl 56 6006 0 6006 2 1 1 1 0 8 1 knotepl 112 122 0 109 2 0 2 2 0 8 1 kqueuepl 144 84 0 82 1 0 1 1 0 8 0 pipelkpl 48 128 0 121 1 0 1 1 0 8 0 pipepl 120 256 0 243 1 0 1 1 0 8 0 fdescpl 496 635 0 620 3 0 3 3 0 8 0 filepl 152 3785 0 3708 6 1 5 6 0 8 1 lockfpl 104 70 0 69 1 0 1 1 0 8 0 lockfspl 48 23 0 22 1 0 1 1 0 8 0 sessionpl 112 20 0 10 1 0 1 1 0 8 0 pgrppl 48 24 0 14 1 0 1 1 0 8 0 ucredpl 96 343 0 334 1 0 1 1 0 8 0 zombiepl 144 620 0 620 1 0 1 1 0 8 1 processpl 984 651 0 620 6 1 5 5 0 8 0 procpl 624 1569 0 1528 4 0 4 4 0 8 0 sosppl 128 3 0 3 2 2 0 1 0 8 0 sockpl 400 1294 0 1275 6 2 4 4 0 8 2 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 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 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 158 0 0 19 0 19 19 0 8 0 mtagpl 80 38 0 0 1 0 1 1 0 8 0 mbufpl 256 263 0 0 16 0 16 16 0 8 0 bufpl 280 4125 0 133 286 0 286 286 0 8 0 anonpl 16 74505 0 59606 75 15 60 70 0 124 0 amapchunkpl 152 3438 0 3286 9 2 7 8 0 158 0 amappl16 192 2975 0 2170 51 10 41 48 0 8 0 amappl15 184 2 0 0 1 0 1 1 0 8 0 amappl14 176 135 0 130 1 0 1 1 0 8 0 amappl13 168 105 0 104 1 0 1 1 0 8 0 amappl12 160 15 0 12 2 1 1 1 0 8 0 amappl11 152 264 0 246 1 0 1 1 0 8 0 amappl10 144 26 0 22 1 0 1 1 0 8 0 amappl9 136 390 0 389 1 0 1 1 0 8 0 amappl8 128 387 0 349 2 0 2 2 0 8 0 amappl7 120 127 0 113 1 0 1 1 0 8 0 amappl6 112 237 0 228 1 0 1 1 0 8 0 amappl5 104 325 0 310 1 0 1 1 0 8 0 amappl4 96 792 0 760 1 0 1 1 0 8 0 amappl3 88 229 0 222 1 0 1 1 0 8 0 amappl2 80 4018 0 3952 2 0 2 2 0 8 0 amappl1 72 24057 0 23624 23 13 10 18 0 8 0 amappl 80 1843 0 1798 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 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 641 0 623 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 641 0 623 1 0 1 1 0 8 0 vmmpekpl 168 8789 0 8755 2 0 2 2 0 8 0 vmmpepl 168 84063 0 82161 133 27 106 110 0 357 20 vmsppl 368 640 0 623 2 0 2 2 0 8 0 pdppl 4096 1290 0 1249 6 0 6 6 0 8 0 pvpl 32 234225 0 216267 172 24 148 169 0 265 3 pmappl 232 640 0 623 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 265 0 8 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(ffffffff824b6ff0) 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(ffffffff8268a5c0) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8268a5c0) 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 __sanitizer_cov_trace_cmp8(7f7ffffd5000,7f7ffffd3a38) at __sanitizer_cov_trace_cmp8+0x31 trace_cmp sys/dev/kcov.c:136 [inline] __sanitizer_cov_trace_cmp8(7f7ffffd5000,7f7ffffd3a38) at __sanitizer_cov_trace_cmp8+0x31 sys/dev/kcov.c:177 uvm_map_inentry(ffff800020ed8c48,ffff800020ed8ca8,7f7ffffd3a38,ffffffff82214acb,ffffffff81da0100,0) at uvm_map_inentry+0x8a uvm_map_inentry_recheck sys/uvm/uvm_map.c:1838 [inline] uvm_map_inentry(ffff800020ed8c48,ffff800020ed8ca8,7f7ffffd3a38,ffffffff82214acb,ffffffff81da0100,0) at uvm_map_inentry+0x8a sys/uvm/uvm_map.c:1888 syscall(ffff80002318b910) at syscall+0x397 mi_syscall sys/sys/syscall_mi.h:81 [inline] syscall(ffff80002318b910) at syscall+0x397 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd3ab0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800023fa4f38,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fa4d80) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e4590d8,ffff800023fa4f38,10,fffffd807f7bf6c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd806724fbf8,ffff800023fa4f38,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ed8018,f0,ffff800023fa4f38,0,ffff800023fa5020) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ed8018,ffff800023fa4fd0,ffff800023fa5020) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fa50a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fa50a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc87e1fcb000, count: -8