uvm_fault(0xffffffff8283d460, 0xfffffd0000000018, 0, 1) -> e kernel: page fault trap, code=0 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xffffffff8283d460, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800023fa38d8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023fa3710, count: 0 ddb{0}> trace tun_dev_read(5d01,ffff800023fa38d8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fa3720) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e696348,ffff800023fa38d8,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80677f3b68,ffff800023fa38d8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff8000230ef620,f0,ffff800023fa38d8,0,ffff800023fa39c0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff8000230ef620,ffff800023fa3970,ffff800023fa39c0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fa3a40) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fa3a40) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4f0351c41c0, count: -8 ddb{0}> show registers rdi 0 rsi 0x3da rbp 0xffff800023fa3660 rbx 0xfffffd0000000000 rdx 0x19a rcx 0xffff800000ad8740 rax 0xffffffff8219d573 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xf150a0af0126ba17 r11 0xec009bb2bb7487c7 r12 0 r13 0x3da r14 0xffff800000af3660 r15 0xffff800023fa38d8 rip 0xffffffff8219d578 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023fa3600 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.1) pid=372925 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=72, nice=20 forw=0xffffffffffffffff, list=0xffff8000230efd70,0xffffffff8289a920 process=0xffff800020ec8bc0 user=0xffff800023f9e000, vmspace=0xfffffd807efffcf0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 13939 395618 71828 0 2 0 syz-executor.1 *13939 372925 71828 0 7 0x4000000 syz-executor.1 56230 271543 39416 0 7 0x1 syz-executor.0 56230 510213 39416 0 2 0x4000000 syz-executor.0 87464 126540 0 0 3 0x14280 nfsidl nfsio 98942 478132 0 0 3 0x14280 nfsidl nfsio 99835 340544 0 0 3 0x14280 nfsidl nfsio 73813 396596 0 0 3 0x14280 nfsidl nfsio 74246 191190 0 0 3 0x14280 nfsidl nfsio 85354 486129 0 0 3 0x14280 nfsidl nfsio 77488 37807 0 0 3 0x14280 nfsidl nfsio 67329 224904 0 0 3 0x14280 nfsidl nfsio 77387 15285 0 0 3 0x14280 nfsidl nfsio 16478 248944 0 0 3 0x14280 nfsidl nfsio 38439 69880 0 0 3 0x14280 nfsidl nfsio 32081 147129 0 0 3 0x14280 nfsidl nfsio 85984 104859 0 0 3 0x14280 nfsidl nfsio 90069 71566 0 0 3 0x14280 nfsidl nfsio 8786 504795 0 0 3 0x14280 nfsidl nfsio 66489 61448 0 0 3 0x14280 nfsidl nfsio 5352 339092 0 0 3 0x14280 nfsidl nfsio 23843 282760 0 0 3 0x14280 nfsidl nfsio 57124 224092 0 0 3 0x14280 nfsidl nfsio 17824 349368 0 0 3 0x14280 nfsidl nfsio 39416 66808 72208 0 2 0x482 syz-executor.0 77069 311219 0 0 3 0x14200 bored sosplice 71828 264877 72208 0 3 0x82 nanosleep syz-executor.1 72208 167786 10939 0 3 0x82 thrsleep syz-fuzzer 72208 430517 10939 0 2 0x4000482 syz-fuzzer 72208 16822 10939 0 3 0x4000082 thrsleep syz-fuzzer 72208 148236 10939 0 3 0x4000082 thrsleep syz-fuzzer 72208 336145 10939 0 3 0x4000082 thrsleep syz-fuzzer 72208 21416 10939 0 3 0x4000082 thrsleep syz-fuzzer 72208 77770 10939 0 3 0x4000082 thrsleep syz-fuzzer 72208 249367 10939 0 3 0x4000082 thrsleep syz-fuzzer 72208 84529 10939 0 3 0x4000082 kqread syz-fuzzer 72208 80448 10939 0 3 0x4000082 thrsleep syz-fuzzer 10939 118652 24215 0 3 0x10008a pause ksh 24215 351379 76342 0 3 0x92 select sshd 48493 406899 1 0 3 0x100083 ttyin getty 76342 234216 1 0 3 0x80 select sshd 72060 111247 5027 74 3 0x100092 bpf pflogd 5027 370591 1 0 3 0x80 netio pflogd 49619 3991 57241 73 3 0x100090 kqread syslogd 57241 260160 1 0 3 0x100082 netio syslogd 84560 347965 1 77 3 0x100090 poll dhclient 73419 110663 1 0 3 0x80 poll dhclient 13318 47214 0 0 3 0x14200 bored smr 78548 18843 0 0 2 0x14200 zerothread 63755 496250 0 0 3 0x14200 aiodoned aiodoned 32086 158168 0 0 3 0x14200 syncer update 11144 206769 0 0 3 0x14200 cleaner cleaner 9331 31820 0 0 3 0x14200 reaper reaper 66289 77730 0 0 3 0x14200 pgdaemon pagedaemon 34543 125752 0 0 3 0x14200 bored crynlk 40241 510814 0 0 3 0x14200 bored crypto 92269 299569 0 0 3 0x40014200 acpi0 acpi0 11536 244656 0 0 3 0x40014200 idle1 69532 314583 0 0 3 0x14200 bored softnet 52257 60778 0 0 3 0x14200 bored systqmp 25757 468466 0 0 3 0x14200 bored systq 29409 386731 0 0 2 0x40014200 softclock 19350 205618 0 0 3 0x40014200 idle0 1 230997 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 13939 (syz-executor.1) thread 0xffff8000230ef620 (372925) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82897680) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9538 6424K 7384K 78643K 16593 0 pcb 15 8K 8K 78643K 332 0 rtable 93 13K 14K 78643K 735 0 ifaddr 84 15K 16K 78643K 229 0 sysctl 1 1K 1K 78643K 1 0 counters 43 33K 34K 78643K 79 0 ioctlops 0 0K 4K 78643K 1580 0 iov 0 0K 16K 78643K 134 0 mount 1 1K 1K 78643K 1 0 vnodes 1226 77K 77K 78643K 2663 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 1K 1K 78643K 90 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 1739 0 sigio 0 0K 0K 78643K 2 0 proc 63 63K 95K 78643K 656 0 subproc 32 2K 2K 78643K 85 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 53 0 in_multi 26 1K 2K 78643K 137 0 ether_multi 1 0K 0K 78643K 16 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 290 0 pfkey data 0 0K 1K 78643K 1 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 131 39K 43K 78643K 5873 0 UVM aobj 27 7K 7K 78643K 30 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 82 0 NDP 15 0K 0K 78643K 44 0 temp 145 3861K 3925K 78643K 31215 0 kqueue 3 4K 12K 78643K 21 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 13 0 10 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 58 0 56 1 0 1 1 0 8 0 rtentry 112 88 0 59 2 0 2 2 0 8 0 unpcb 120 452 0 439 1 0 1 1 0 8 0 syncache 264 13 0 13 5 5 0 1 0 8 0 sackhl 24 3 0 3 1 1 0 1 0 8 0 tcpqe 32 903 0 903 2 2 0 1 0 8 0 tcpcb 544 536 0 527 1 0 1 1 0 8 0 inpcb 280 1398 0 1383 7 5 2 2 0 8 0 nd6 48 17 0 15 1 0 1 1 0 8 0 pkpcb 40 10 0 10 4 4 0 1 0 8 0 ppxss 1128 3 0 3 3 3 0 1 0 8 0 pfstscr 40 4 0 3 1 0 1 1 0 8 0 pffrag 232 8 0 7 4 3 1 1 0 482 0 pffrnode 88 8 0 7 4 3 1 1 0 8 0 pffrent 40 21 0 20 4 3 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 53 3 2 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 48 0 40 1 0 1 1 0 8 0 pfstkey 112 54 0 46 1 0 1 1 0 8 0 pfstate 328 50 0 43 3 1 2 3 0 8 0 pfrule 1360 42 0 25 3 1 2 2 0 8 0 art_heap8 4096 3 0 1 3 1 2 3 0 8 0 art_heap4 256 416 0 251 14 3 11 12 0 8 0 art_table 32 419 0 252 2 0 2 2 0 8 0 art_node 16 85 0 58 1 0 1 1 0 8 0 sysvmsgpl 40 49 0 17 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 80 0 70 1 0 1 1 0 8 0 shmpl 112 28 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3413 0 2007 90 1 89 89 0 8 0 ffsino 272 3413 0 2007 96 1 95 95 0 8 0 nchpl 144 5647 0 4047 60 0 60 60 0 8 0 uvmvnodes 72 4754 0 0 87 0 87 87 0 8 0 vnodes 208 4754 0 0 251 0 251 251 0 8 0 namei 1024 18483 0 18483 3 2 1 1 0 8 1 percpumem 16 50 0 18 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 11 0 9 2 1 1 1 0 8 0 pfiaddrpl 120 20 0 15 3 2 1 1 0 8 0 scxspl 192 17254 0 17254 12 11 1 7 0 8 1 plimitpl 152 65 0 57 1 0 1 1 0 8 0 sigapl 424 1966 0 1913 6 0 6 6 0 8 0 futexpl 56 24402 0 24402 2 1 1 1 0 8 1 knotepl 112 119 0 100 1 0 1 1 0 8 0 kqueuepl 144 86 0 84 1 0 1 1 0 8 0 pipepl 304 176 0 166 3 2 1 2 0 8 0 fdescpl 496 1930 0 1913 3 0 3 3 0 8 0 filepl 152 10336 0 10226 7 2 5 5 0 8 0 lockfpl 104 199 0 198 1 0 1 1 0 8 0 lockfspl 48 71 0 70 1 0 1 1 0 8 0 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 25 0 14 1 0 1 1 0 8 0 ucredpl 96 2200 0 2191 1 0 1 1 0 8 0 zombiepl 144 1913 0 1913 3 2 1 1 0 8 1 processpl 984 1966 0 1913 8 1 7 7 0 8 0 procpl 624 4932 0 4868 7 1 6 6 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 8 0 8 2 2 0 1 0 8 0 sockpl 400 1922 0 1892 13 9 4 4 0 8 1 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 11 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 188 0 0 23 0 23 23 0 8 0 mtagpl 80 35 0 0 1 0 1 1 0 8 0 mbufpl 256 290 0 0 15 0 15 15 0 8 0 mbufpl: pool(0xffffffff828c73e0:mbufpl): free list modified: page 0xfffffd806aa80000; item ordinal 3; addr 0xfffffd806aa80700 (p 0xfffffd806e2be000); offset 0x0=0xfb39d40000000000 bufpl 280 6262 0 141 438 0 438 438 0 8 0 anonpl 16 164252 0 148702 81 16 65 76 0 124 0 amapchunkpl 152 9749 0 9617 15 6 9 13 0 158 0 amappl16 192 7739 0 6878 55 11 44 48 0 8 0 amappl15 184 123 0 121 1 0 1 1 0 8 0 amappl14 176 564 0 554 1 0 1 1 0 8 0 amappl13 168 57 0 54 1 0 1 1 0 8 0 amappl12 160 738 0 733 1 0 1 1 0 8 0 amappl11 152 78 0 62 1 0 1 1 0 8 0 amappl10 144 82 0 76 1 0 1 1 0 8 0 amappl9 136 1136 0 1133 1 0 1 1 0 8 0 amappl8 128 1197 0 1151 2 0 2 2 0 8 0 amappl7 120 195 0 181 1 0 1 1 0 8 0 amappl6 112 33 0 27 1 0 1 1 0 8 0 amappl5 104 2035 0 2018 1 0 1 1 0 8 0 amappl4 96 536 0 506 1 0 1 1 0 8 0 amappl3 88 156 0 150 1 0 1 1 0 8 0 amappl2 80 15743 0 15663 2 0 2 2 0 8 0 amappl1 72 46273 0 45811 23 13 10 18 0 8 0 amappl 80 5235 0 5191 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 29 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1941 0 1922 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1941 0 1922 1 0 1 1 0 8 0 vmmpekpl 168 14181 0 14137 3 0 3 3 0 8 0 vmmpepl 168 233892 0 231742 150 56 94 119 0 357 0 vmsppl 368 1940 0 1922 2 0 2 2 0 8 0 pdppl 4096 3889 0 3846 7 1 6 6 0 8 0 pvpl 32 485522 0 466612 214 59 155 183 0 265 1 pmappl 232 1940 0 1922 4 2 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 290 0 22 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d01,ffff800023fa38d8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023fa3720) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e696348,ffff800023fa38d8,10,fffffd807f7bf9c0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd80677f3b68,ffff800023fa38d8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff8000230ef620,f0,ffff800023fa38d8,0,ffff800023fa39c0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff8000230ef620,ffff800023fa3970,ffff800023fa39c0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023fa3a40) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023fa3a40) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4f0351c41c0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d70ff0) 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(ffffffff82897478) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82897478) at __mp_lock+0x127 sys/kern/kern_lock.c:147 ktrstruct(ffff8000230eec60,ffffffff823d6d4f,ffff800020ebf4b8,10) at ktrstruct+0xee sys_clock_gettime(ffff8000230eec60,ffff800020ebf520,ffff800020ebf570) at sys_clock_gettime+0xfb sys/kern/kern_time.c:171 syscall(ffff800020ebf5f0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800020ebf5f0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff1800, count: -8