uvm_fault(0xffffffff8288d220, 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(0xffffffff8288d220, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800023f2bc78,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023f2bab0, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800023f2bc78,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f2bac0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e2dc4e8,ffff800023f2bc78,10,fffffd807f7bf8a0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066c2ac90,ffff800023f2bc78,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e23d58,f0,ffff800023f2bc78,0,ffff800023f2bd60) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e23d58,ffff800023f2bd10,ffff800023f2bd60) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f2bde0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f2bde0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab81812d1b0, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800023f2ba00 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff800000ad98c0 rax 0xffffffff81582663 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x3389a4c15035b428 r11 0xe81f0420063a9ca0 r12 0 r13 0x3da r14 0xffff800000aefe60 r15 0xffff800023f2bc78 rip 0xffffffff81582668 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023f2b9a0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=290341 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e22288,0xffffffff8289bb10 process=0xffff800020e087d0 user=0xffff800023f26000, vmspace=0xfffffd807efff730 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7949 414585 45453 0 7 0 syz-executor.1 * 7949 290341 45453 0 7 0x4000000 syz-executor.1 88528 472184 55435 0 2 0 syz-executor.0 88528 82913 55435 0 2 0x4000000 syz-executor.0 88528 461103 55435 0 2 0x4000000 syz-executor.0 69360 341981 0 0 3 0x14200 bored sosplice 45453 387662 64430 0 3 0x82 nanosleep syz-executor.1 55435 461691 64430 0 3 0x82 nanosleep syz-executor.0 64430 167642 16827 0 3 0x82 thrsleep syz-fuzzer 64430 4304 16827 0 3 0x4000082 nanosleep syz-fuzzer 64430 376109 16827 0 3 0x4000082 nanosleep syz-fuzzer 64430 341514 16827 0 3 0x4000082 thrsleep syz-fuzzer 64430 91593 16827 0 3 0x4000082 thrsleep syz-fuzzer 64430 110850 16827 0 3 0x4000082 thrsleep syz-fuzzer 64430 307617 16827 0 3 0x4000082 thrsleep syz-fuzzer 64430 467020 16827 0 3 0x4000082 thrsleep syz-fuzzer 64430 459689 16827 0 3 0x4000082 kqread syz-fuzzer 64430 324231 16827 0 3 0x4000082 thrsleep syz-fuzzer 16827 146175 73380 0 3 0x10008a pause ksh 73380 413482 62617 0 3 0x92 select sshd 12232 327332 1 0 3 0x100083 ttyin getty 62617 214507 1 0 3 0x80 select sshd 54687 395173 64898 74 3 0x100092 bpf pflogd 64898 172491 1 0 3 0x80 netio pflogd 49424 444382 7930 73 3 0x100090 kqread syslogd 7930 412557 1 0 3 0x100082 netio syslogd 83579 365496 1 77 3 0x100090 poll dhclient 81947 245933 1 0 3 0x80 poll dhclient 76297 12924 0 0 3 0x14200 bored smr 3423 309421 0 0 2 0x14200 zerothread 42570 255841 0 0 3 0x14200 aiodoned aiodoned 11474 29058 0 0 3 0x14200 syncer update 48026 169201 0 0 3 0x14200 cleaner cleaner 14765 334693 0 0 3 0x14200 reaper reaper 60383 443752 0 0 3 0x14200 pgdaemon pagedaemon 98391 505618 0 0 3 0x14200 bored crynlk 54056 47532 0 0 3 0x14200 bored crypto 84059 15943 0 0 3 0x40014200 acpi0 acpi0 9007 188261 0 0 3 0x40014200 idle1 37508 348272 0 0 3 0x14200 bored softnet 30210 71311 0 0 3 0x14200 bored systqmp 49808 172871 0 0 3 0x14200 bored systq 89005 441410 0 0 3 0x40014200 bored softclock 95227 502557 0 0 3 0x40014200 idle0 1 141297 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 7949 (syz-executor.1) thread 0xffff800020e23d58 (290341) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff8289dd48) #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 9497 6408K 7053K 78643K 10959 0 pcb 13 8K 8K 78643K 26 0 rtable 108 5K 6K 78643K 244 0 ifaddr 62 13K 13K 78643K 68 0 counters 43 33K 33K 78643K 43 0 ioctlops 0 0K 4K 78643K 1503 0 iov 0 0K 16K 78643K 13 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1315 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 9 0K 0K 78643K 9 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 197 0 sigio 0 0K 0K 78643K 2 0 proc 60 63K 95K 78643K 451 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 4 0 in_multi 43 2K 3K 78643K 65 0 ether_multi 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 223 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 130 39K 39K 78643K 1478 0 UVM aobj 4 2K 2K 78643K 6 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 10 0 NDP 10 0K 0K 78643K 16 0 temp 82 3850K 3914K 78643K 2451 0 kqueue 3 4K 8K 78643K 7 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 7 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 19 0 17 1 0 1 1 0 8 0 rtentry 112 55 0 14 2 0 2 2 0 8 0 unpcb 120 265 0 255 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 340 0 340 1 0 1 1 0 8 1 tcpcb 544 46 0 42 2 0 2 2 0 8 1 inpcb 296 195 0 188 2 0 2 2 0 8 1 nd6 48 10 0 6 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 45 0 45 1 0 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 pfrktable 1344 7 0 3 1 0 1 1 0 8 0 pfstitem 24 18 0 0 1 0 1 1 0 8 0 pfstkey 112 18 0 0 1 0 1 1 0 8 0 pfstate 328 18 0 0 2 0 2 2 0 8 0 pfrule 1360 25 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 226 0 44 13 0 13 13 0 8 0 art_table 32 227 0 44 2 0 2 2 0 8 0 art_node 16 54 0 16 1 0 1 1 0 8 0 semupl 112 10 0 10 1 0 1 1 0 8 1 semapl 112 7 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1623 0 217 89 0 89 89 0 8 1 ffsino 272 1623 0 217 94 0 94 94 0 8 0 nchpl 144 2040 0 431 60 0 60 60 0 8 0 uvmvnodes 72 1747 0 0 32 0 32 32 0 8 0 vnodes 208 1747 0 0 92 0 92 92 0 8 0 namei 1024 5388 0 5388 1 0 1 1 0 8 1 percpumem 16 32 0 0 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 4 0 0 1 0 1 1 0 8 0 scxspl 192 6013 0 6013 8 1 7 7 0 8 7 plimitpl 152 17 0 9 1 0 1 1 0 8 0 sigapl 424 413 0 380 4 0 4 4 0 8 0 futexpl 56 2221 0 2221 1 0 1 1 0 8 1 knotepl 112 65 0 46 1 0 1 1 0 8 0 kqueuepl 144 14 0 12 1 0 1 1 0 8 0 pipelkpl 48 84 0 74 1 0 1 1 0 8 0 pipepl 120 168 0 149 1 0 1 1 0 8 0 fdescpl 496 397 0 380 3 0 3 3 0 8 0 filepl 152 2009 0 1909 5 0 5 5 0 8 1 lockfpl 104 16 0 15 1 0 1 1 0 8 0 lockfspl 48 7 0 6 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 186 0 177 1 0 1 1 0 8 0 zombiepl 144 380 0 380 1 0 1 1 0 8 1 processpl 984 413 0 380 5 0 5 5 0 8 0 procpl 624 703 0 658 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 400 483 0 464 6 1 5 5 0 8 3 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 259 0 0 32 0 32 32 0 8 0 mtagpl 96 59 0 0 2 0 2 2 0 8 0 mbufpl 256 281 0 0 18 0 18 18 0 8 0 bufpl 280 3536 0 133 244 0 244 244 0 8 0 anonpl 16 48121 0 32839 63 1 62 62 0 124 0 amapchunkpl 152 1813 0 1675 7 0 7 7 0 158 0 amappl16 192 1629 0 806 42 0 42 42 0 8 0 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 45 0 36 1 0 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 9 0 8 2 1 1 1 0 8 0 amappl11 152 57 0 42 1 0 1 1 0 8 0 amappl10 144 26 0 18 1 0 1 1 0 8 0 amappl9 136 551 0 546 1 0 1 1 0 8 0 amappl8 128 523 0 485 2 0 2 2 0 8 0 amappl7 120 117 0 107 1 0 1 1 0 8 0 amappl6 112 24 0 22 1 0 1 1 0 8 0 amappl5 104 302 0 285 1 0 1 1 0 8 0 amappl4 96 488 0 458 1 0 1 1 0 8 0 amappl3 88 103 0 97 1 0 1 1 0 8 0 amappl2 80 2231 0 2152 2 0 2 2 0 8 0 amappl1 72 18023 0 17558 24 12 12 18 0 8 1 amappl 80 957 0 909 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 5 0 2 1 0 1 1 0 8 0 uaddrrnd 24 405 0 386 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 405 0 386 1 0 1 1 0 8 0 vmmpekpl 168 6809 0 6777 2 0 2 2 0 8 0 vmmpepl 168 54385 0 52280 117 7 110 110 0 357 18 vmsppl 368 404 0 386 2 0 2 2 0 8 0 pdppl 4096 817 0 774 7 1 6 6 0 8 0 pvpl 32 165490 0 147002 154 0 154 154 0 265 4 pmappl 232 404 0 386 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 281 0 5 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(ffffffff8273dff0) 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(ffffffff8289db40) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8289db40) 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 witness_warn(2,0,ffffffff8245c1b2) at witness_warn+0x374 sys/kern/subr_witness.c:1431 userret(ffff800020e22018) at userret+0x360 sys/kern/kern_sig.c:1898 syscall(ffff800020ed93e0) at syscall+0x55f mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff800020ed93e0) at syscall+0x55f sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffec1a0, count: -10 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800023f2bc78,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023f2bac0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e2dc4e8,ffff800023f2bc78,10,fffffd807f7bf8a0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066c2ac90,ffff800023f2bc78,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e23d58,f0,ffff800023f2bc78,0,ffff800023f2bd60) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e23d58,ffff800023f2bd10,ffff800023f2bd60) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023f2bde0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023f2bde0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xab81812d1b0, count: -8