uvm_fault(0xffffffff82619b98, 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(0xffffffff82619b98, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800023f94e98,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023f94cd0, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800023f94e98,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f94ce0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd8075408760,ffff800023f94e98,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066abce58,ffff800023f94e98,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec6eb8,f0,ffff800023f94e98,0,ffff800023f94f80) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec6eb8,ffff800023f94f30,ffff800023f94f80) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f95000) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f95000) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe0cc5b900b0, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800023f94c20 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff800000a25980 rax 0xffffffff8120ea33 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xb4231a904867af95 r11 0x3f20ce764a86ff88 r12 0 r13 0x3da r14 0xffff800000a4ce60 r15 0xffff800023f94e98 rip 0xffffffff8120ea38 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023f94bc0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=79932 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ec7608,0xffffffff8266d478 process=0xffff800020e93b08 user=0xffff800023f90000, vmspace=0xfffffd806e954008 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 39781 188501 47372 0 2 0 syz-executor.1 39781 400292 47372 0 2 0x4000000 syz-executor.1 39781 245801 47372 0 2 0x4000000 syz-executor.1 *39781 79932 47372 0 7 0x4000000 syz-executor.1 18162 344756 0 0 3 0x14200 bored sosplice 47372 37620 16136 0 3 0x82 nanosleep syz-executor.1 28756 119143 0 0 3 0x14200 acct acct 21225 23290 16136 0 3 0x82 piperd syz-executor.0 16136 64213 66111 0 3 0x82 kqread syz-fuzzer 16136 124528 66111 0 3 0x4000082 nanosleep syz-fuzzer 16136 487166 66111 0 3 0x4000082 thrsleep syz-fuzzer 16136 462156 66111 0 3 0x4000082 thrsleep syz-fuzzer 16136 235341 66111 0 3 0x4000082 thrsleep syz-fuzzer 16136 244195 66111 0 3 0x4000082 thrsleep syz-fuzzer 16136 388151 66111 0 3 0x4000082 thrsleep syz-fuzzer 16136 80514 66111 0 3 0x4000082 thrsleep syz-fuzzer 16136 114714 66111 0 7 0x4000002 syz-fuzzer 16136 280401 66111 0 3 0x4000082 thrsleep syz-fuzzer 66111 262792 576 0 3 0x10008a pause ksh 576 170203 63530 0 3 0x92 select sshd 24473 463467 1 0 3 0x100083 ttyin getty 63530 241663 1 0 3 0x80 select sshd 55266 354608 59088 74 3 0x100092 bpf pflogd 59088 293857 1 0 3 0x80 netio pflogd 12165 301540 57455 73 3 0x100090 kqread syslogd 57455 349588 1 0 3 0x100082 netio syslogd 69658 341870 1 77 3 0x100090 poll dhclient 24046 276751 1 0 3 0x80 poll dhclient 33040 512708 0 0 3 0x14200 bored smr 96265 31335 0 0 2 0x14200 zerothread 94692 331031 0 0 3 0x14200 aiodoned aiodoned 17783 214603 0 0 3 0x14200 syncer update 48805 78523 0 0 3 0x14200 cleaner cleaner 13416 110400 0 0 3 0x14200 reaper reaper 47666 395351 0 0 3 0x14200 pgdaemon pagedaemon 48668 256616 0 0 3 0x14200 bored crynlk 46568 203652 0 0 3 0x14200 bored crypto 22440 409950 0 0 3 0x40014200 acpi0 acpi0 49245 293396 0 0 3 0x40014200 idle1 46339 15529 0 0 3 0x14200 bored softnet 47034 470124 0 0 3 0x14200 bored systqmp 24904 25396 0 0 3 0x14200 bored systq 65047 187553 0 0 3 0x40014200 bored softclock 48129 31987 0 0 3 0x40014200 idle0 1 426182 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 39781 (syz-executor.1) thread 0xffff800020ec6eb8 (79932) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82655658) #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 9525 6419K 6805K 78643K 11968 0 pcb 13 8K 8K 78643K 123 0 rtable 87 2K 3K 78643K 360 0 ifaddr 69 13K 13K 78643K 142 0 counters 41 33K 33K 78643K 61 0 ioctlops 0 0K 4K 78643K 1492 0 iov 0 0K 16K 78643K 62 0 mount 1 1K 1K 78643K 1 0 vnodes 1227 77K 77K 78643K 1885 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 1K 1K 78643K 45 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 476 0 sigio 0 0K 0K 78643K 9 0 proc 61 63K 83K 78643K 534 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 45 0 in_multi 35 2K 2K 78643K 129 0 ether_multi 1 0K 0K 78643K 25 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 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 261 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 132 71K 72K 78643K 2482 0 UVM aobj 24 2K 2K 78643K 26 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 106 0 NDP 12 0K 0K 78643K 28 0 temp 105 3039K 3107K 78643K 8219 0 kqueue 3 4K 10K 78643K 23 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 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 50 0 48 1 0 1 1 0 8 0 rtentry 112 64 0 29 3 1 2 2 0 8 0 unpcb 120 249 0 239 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 24 0 24 1 1 0 1 0 8 0 tcpcb 544 300 0 296 2 1 1 2 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 280 809 0 802 4 2 2 2 0 8 1 rttmr 72 2 0 2 1 0 1 1 0 8 1 nd6 48 9 0 6 1 0 1 1 0 8 0 pkpcb 40 5 0 5 2 2 0 1 0 8 0 pffrag 232 6 0 6 4 4 0 1 0 482 0 pffrnode 88 6 0 6 4 4 0 1 0 8 0 pffrent 40 184 0 184 4 4 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 pfstitem 24 47 0 21 1 0 1 1 0 8 0 pfstkey 112 47 0 21 2 0 2 2 0 8 0 pfstate 328 47 0 21 3 0 3 3 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 256 252 0 94 12 2 10 12 0 8 0 art_table 32 253 0 94 2 0 2 2 0 8 0 art_node 16 63 0 33 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 10 1 0 1 1 0 8 0 semapl 112 43 0 33 1 0 1 1 0 8 0 shmpl 112 24 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2085 0 682 89 1 88 89 0 8 0 ffsino 272 2085 0 682 94 0 94 94 0 8 0 nchpl 144 2948 0 1355 60 0 60 60 0 8 0 uvmvnodes 72 2699 0 0 50 0 50 50 0 8 0 vnodes 208 2699 0 0 143 0 143 143 0 8 0 namei 1024 8874 0 8874 1 0 1 1 0 8 1 percpumem 16 41 0 10 1 0 1 1 0 8 0 vcpupl 1984 5 0 0 1 0 1 1 0 8 0 vmpool 560 8 0 3 2 1 1 1 0 8 0 scxspl 192 8011 0 8011 7 6 1 4 0 8 1 plimitpl 152 52 0 44 1 0 1 1 0 8 0 sigapl 424 690 0 657 4 0 4 4 0 8 0 futexpl 56 8437 0 8437 1 0 1 1 0 8 1 knotepl 112 101 0 82 1 0 1 1 0 8 0 kqueuepl 144 72 0 70 1 0 1 1 0 8 0 pipelkpl 48 169 0 159 1 0 1 1 0 8 0 pipepl 120 338 0 319 2 1 1 2 0 8 0 fdescpl 496 673 0 657 3 0 3 3 0 8 0 filepl 152 4583 0 4483 5 0 5 5 0 8 1 lockfpl 104 113 0 112 1 0 1 1 0 8 0 lockfspl 48 40 0 39 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 22 0 11 1 0 1 1 0 8 0 ucredpl 96 370 0 361 1 0 1 1 0 8 0 zombiepl 144 657 0 657 1 0 1 1 0 8 1 processpl 984 690 0 657 5 0 5 5 0 8 0 procpl 624 1655 0 1610 4 0 4 4 0 8 0 srpgc 64 4 0 4 2 2 0 1 0 8 0 sosppl 128 6 0 6 2 2 0 1 0 8 0 sockpl 400 1116 0 1097 5 2 3 4 0 8 1 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 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 16 0 0 2 0 2 2 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 232 0 0 28 0 28 28 0 8 0 mtagpl 80 68 0 0 2 0 2 2 0 8 0 mbufpl 256 302 0 0 18 1 17 17 0 8 0 bufpl 280 4229 0 138 293 0 293 293 0 8 0 anonpl 16 85337 0 69469 88 16 72 79 0 124 5 amapchunkpl 152 4062 0 3925 14 3 11 11 0 158 4 amappl16 192 3307 0 2406 64 18 46 57 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 93 0 88 1 0 1 1 0 8 0 amappl13 168 99 0 97 1 0 1 1 0 8 0 amappl12 160 128 0 122 1 0 1 1 0 8 0 amappl11 152 318 0 301 1 0 1 1 0 8 0 amappl10 144 22 0 16 1 0 1 1 0 8 0 amappl9 136 386 0 383 1 0 1 1 0 8 0 amappl8 128 384 0 346 2 0 2 2 0 8 0 amappl7 120 126 0 113 1 0 1 1 0 8 0 amappl6 112 27 0 21 2 1 1 1 0 8 0 amappl5 104 609 0 592 1 0 1 1 0 8 0 amappl4 96 573 0 541 1 0 1 1 0 8 0 amappl3 88 177 0 170 1 0 1 1 0 8 0 amappl2 80 4338 0 4267 2 0 2 2 0 8 0 amappl1 72 24652 0 24204 23 13 10 18 0 8 0 amappl 80 1916 0 1868 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 25 0 2 1 0 1 1 0 8 0 uaddrrnd 24 681 0 660 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 681 0 660 1 0 1 1 0 8 0 vmmpekpl 168 8822 0 8790 2 0 2 2 0 8 0 vmmpepl 168 89706 0 87611 144 45 99 126 0 357 7 vmsppl 368 680 0 660 2 0 2 2 0 8 0 pdppl 4096 1370 0 1325 6 0 6 6 0 8 0 pvpl 32 248599 0 229580 199 24 175 188 0 265 15 pmappl 232 680 0 660 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 275 0 10 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(ffffffff82521ff0) 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(ffffffff82655450,ffffffff82655450) at __sanitizer_cov_trace_cmp4+0x3e sys/dev/kcov.c:172 softintr_dispatch(0) at softintr_dispatch+0x4e sys/arch/amd64/amd64/softintr.c:89 Xsoftclock() at Xsoftclock+0x1f end of kernel end trace frame: 0xc00266bac0, count: -6 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800023f94e98,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f94ce0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd8075408760,ffff800023f94e98,10,fffffd807f7bf900) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066abce58,ffff800023f94e98,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ec6eb8,f0,ffff800023f94e98,0,ffff800023f94f80) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ec6eb8,ffff800023f94f30,ffff800023f94f80) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f95000) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f95000) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe0cc5b900b0, count: -8