uvm_fault(0xffffffff82553420, 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(0xffffffff82553420, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d00,ffff800023fc7078,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023fc6eb0, count: 0 ddb{1}> trace tun_dev_read(5d00,ffff800023fc7078,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fc6ec0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e93c0d8,ffff800023fc7078,10,fffffd807f7bf720) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8068342908,ffff800023fc7078,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec6288,f0,ffff800023fc7078,0,ffff800023fc7160) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec6288,ffff800023fc7110,ffff800023fc7160) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fc71e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fc71e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1cddf3cff00, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800023fc6e00 rbx 0xfffffd0000000000 rdx 0x182 rcx 0xffff800000a1c0c0 rax 0xffffffff81d67c43 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x33c44f45cf4e146e r11 0x26ff81ea0c17bbf7 r12 0 r13 0x3da r14 0xffff8000009d5660 r15 0xffff800023fc7078 rip 0xffffffff81d67c48 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023fc6da0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.0) pid=193021 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=55, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec7398,0xffff800020ec6ec8 process=0xffff800020e93b10 user=0xffff800023fc2000, vmspace=0xfffffd806e9515c8 estcpu=5, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 79805 429214 76834 0 3 0x80 fsleep syz-executor.0 *79805 193021 76834 0 7 0x4000000 syz-executor.0 79805 61932 76834 0 3 0x4000080 fsleep syz-executor.0 49529 288829 82223 0 3 0x80 fsleep syz-executor.1 49529 258754 82223 0 3 0x4000080 pipewr syz-executor.1 82223 417136 99500 0 3 0x82 nanosleep syz-executor.1 84411 198633 0 0 3 0x14200 bored sosplice 76834 291720 99500 0 3 0x82 nanosleep syz-executor.0 99500 66224 50987 0 3 0x82 kqread syz-fuzzer 99500 272372 50987 0 3 0x4000082 nanosleep syz-fuzzer 99500 394612 50987 0 3 0x4000082 thrsleep syz-fuzzer 99500 123449 50987 0 3 0x4000082 nanosleep syz-fuzzer 99500 1556 50987 0 3 0x4000082 thrsleep syz-fuzzer 99500 388647 50987 0 3 0x4000082 thrsleep syz-fuzzer 99500 501050 50987 0 3 0x4000082 thrsleep syz-fuzzer 99500 8105 50987 0 3 0x4000082 thrsleep syz-fuzzer 99500 213386 50987 0 3 0x4000082 thrsleep syz-fuzzer 99500 155017 50987 0 3 0x4000082 thrsleep syz-fuzzer 99500 439639 50987 0 3 0x4000082 thrsleep syz-fuzzer 50987 3969 62153 0 3 0x10008a pause ksh 62153 92871 57729 0 3 0x92 select sshd 88619 133420 1 0 3 0x100083 ttyin getty 57729 107209 1 0 3 0x80 select sshd 34963 12404 21862 74 3 0x100092 bpf pflogd 21862 76056 1 0 3 0x80 netio pflogd 31426 474262 23946 73 3 0x100090 kqread syslogd 23946 468049 1 0 3 0x100082 netio syslogd 21072 257075 1 77 3 0x100090 poll dhclient 5836 78141 1 0 3 0x80 poll dhclient 73273 357699 0 0 3 0x14200 bored smr 5606 114402 0 0 3 0x14200 pgzero zerothread 14584 278324 0 0 3 0x14200 aiodoned aiodoned 56140 399419 0 0 3 0x14200 syncer update 60648 319961 0 0 3 0x14200 cleaner cleaner 92167 480443 0 0 3 0x14200 reaper reaper 78678 384171 0 0 3 0x14200 pgdaemon pagedaemon 71599 388046 0 0 3 0x14200 bored crynlk 8472 58486 0 0 3 0x14200 bored crypto 90248 419586 0 0 3 0x40014200 acpi0 acpi0 3976 439083 0 0 3 0x40014200 idle1 8280 101138 0 0 3 0x14200 bored softnet 70038 270222 0 0 3 0x14200 bored systqmp 82798 141915 0 0 3 0x14200 bored systq 45808 144500 0 0 3 0x40014200 bored softclock 5587 485244 0 0 7 0x40014200 idle0 1 437610 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 79805 (syz-executor.0) thread 0xffff800020ec6288 (193021) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82642d90) #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 9544 6433K 6817K 78643K 11018 0 pcb 13 8K 8K 78643K 97 0 rtable 104 5K 5K 78643K 363 0 ifaddr 94 17K 18K 78643K 168 0 counters 43 33K 34K 78643K 61 0 ioctlops 0 0K 4K 78643K 1517 0 iov 0 0K 16K 78643K 44 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1385 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 45 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 479 0 proc 61 63K 83K 78643K 531 0 subproc 32 2K 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 34 0 in_multi 69 3K 3K 78643K 125 0 ether_multi 1 0K 0K 78643K 11 0 mrt 0 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 247 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 121 55K 64K 78643K 2382 0 UVM aobj 18 2K 2K 78643K 35 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 38 0 NDP 15 0K 0K 78643K 31 0 temp 124 3041K 3105K 78643K 4759 0 kqueue 3 4K 8K 78643K 13 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 11 0 3 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 66 0 27 2 0 2 2 0 8 0 unpcb 120 269 0 259 1 0 1 1 0 8 0 syncache 264 5 0 5 2 2 0 1 0 8 0 tcpqe 32 57 0 57 3 3 0 1 0 8 0 tcpcb 544 391 0 385 1 0 1 1 0 8 0 inpcb 280 1247 0 1237 4 2 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 10 0 7 1 0 1 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 4 0 4 2 2 0 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 14 0 11 3 2 1 1 0 8 0 pfstitem 24 33 0 20 1 0 1 1 0 8 0 pfstkey 112 33 0 20 1 0 1 1 0 8 0 pfstate 328 33 0 20 2 0 2 2 0 8 0 pfrule 1360 27 0 21 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 278 0 110 13 1 12 13 0 8 0 art_table 32 280 0 110 2 0 2 2 0 8 0 art_node 16 65 0 30 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 4 1 0 1 1 0 8 0 semapl 112 43 0 33 1 0 1 1 0 8 0 shmpl 112 33 0 17 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2030 0 627 89 0 89 89 0 8 0 ffsino 272 2030 0 627 95 0 95 95 0 8 0 nchpl 144 2824 0 1227 60 0 60 60 0 8 0 uvmvnodes 72 2173 0 0 40 0 40 40 0 8 0 vnodes 208 2173 0 0 115 0 115 115 0 8 0 namei 1024 7714 0 7714 2 1 1 1 0 8 1 percpumem 16 41 0 9 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 8 0 6 1 0 1 1 0 8 0 pfiaddrpl 120 5 0 4 3 2 1 1 0 8 0 scxspl 192 7596 0 7596 10 9 1 7 0 8 1 plimitpl 152 47 0 39 1 0 1 1 0 8 0 sigapl 424 692 0 659 4 0 4 4 0 8 0 futexpl 56 9677 0 9674 2 1 1 1 0 8 0 knotepl 112 86 0 67 1 0 1 1 0 8 0 kqueuepl 144 35 0 33 1 0 1 1 0 8 0 pipelkpl 48 127 0 116 1 0 1 1 0 8 0 pipepl 120 254 0 233 1 0 1 1 0 8 0 fdescpl 496 676 0 659 3 0 3 3 0 8 0 filepl 152 4031 0 3925 6 1 5 5 0 8 0 lockfpl 104 43 0 42 1 0 1 1 0 8 0 lockfspl 48 16 0 15 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 50 0 39 1 0 1 1 0 8 0 ucredpl 96 386 0 377 1 0 1 1 0 8 0 zombiepl 144 659 0 659 1 0 1 1 0 8 1 processpl 984 692 0 659 6 1 5 5 0 8 0 procpl 624 1562 0 1516 4 0 4 4 0 8 0 sosppl 128 5 0 5 2 2 0 1 0 8 0 sockpl 400 1547 0 1525 7 4 3 4 0 8 0 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 6 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 175 0 0 21 0 21 21 0 8 0 mtagpl 80 28 0 0 1 0 1 1 0 8 0 mbufpl 256 205 0 0 11 0 11 11 0 8 0 bufpl 280 3922 0 134 271 0 271 271 0 8 0 anonpl 16 73513 0 58093 74 11 63 70 0 124 0 amapchunkpl 152 3881 0 3743 19 12 7 19 0 158 0 amappl16 192 2494 0 1659 44 2 42 43 0 8 0 amappl15 184 63 0 62 1 0 1 1 0 8 0 amappl14 176 392 0 385 1 0 1 1 0 8 0 amappl13 168 36 0 33 1 0 1 1 0 8 0 amappl12 160 241 0 237 2 1 1 1 0 8 0 amappl11 152 122 0 107 1 0 1 1 0 8 0 amappl10 144 22 0 15 1 0 1 1 0 8 0 amappl9 136 391 0 389 1 0 1 1 0 8 0 amappl8 128 366 0 340 1 0 1 1 0 8 0 amappl7 120 124 0 111 1 0 1 1 0 8 0 amappl6 112 23 0 19 1 0 1 1 0 8 0 amappl5 104 576 0 558 1 0 1 1 0 8 0 amappl4 96 522 0 486 2 0 2 2 0 8 0 amappl3 88 250 0 244 1 0 1 1 0 8 0 amappl2 80 4673 0 4592 2 0 2 2 0 8 0 amappl1 72 24296 0 23851 22 11 11 18 0 8 0 amappl 80 1836 0 1787 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 34 0 17 1 0 1 1 0 8 0 uaddrrnd 24 684 0 665 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 684 0 665 1 0 1 1 0 8 0 vmmpekpl 168 8625 0 8591 2 0 2 2 0 8 0 vmmpepl 168 88403 0 86323 137 45 92 117 0 357 1 vmsppl 368 683 0 665 2 0 2 2 0 8 0 pdppl 4096 1376 0 1332 6 0 6 6 0 8 0 pvpl 32 232450 0 213766 178 27 151 170 0 265 0 pmappl 232 683 0 665 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 265 0 9 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(ffffffff824d1ff0) 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 __sanitizer_cov_trace_cmp4(ffffffff82642b88,ffffffff82642b88) at __sanitizer_cov_trace_cmp4+0x72 sys/dev/kcov.c:137 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f acpicpu_idle() at acpicpu_idle+0x331 sys/dev/acpi/acpicpu.c:1187 sched_idle(ffffffff824d1ff0) at sched_idle+0x3f7 sys/kern/kern_sched.c:182 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d00,ffff800023fc7078,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fc6ec0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e93c0d8,ffff800023fc7078,10,fffffd807f7bf720) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8068342908,ffff800023fc7078,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec6288,f0,ffff800023fc7078,0,ffff800023fc7160) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec6288,ffff800023fc7110,ffff800023fc7160) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fc71e0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fc71e0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1cddf3cff00, count: -8