uvm_fault(0xffffffff82862210, 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(0xffffffff82862210, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff8000231093c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800023109200, count: 0 ddb{0}> trace tun_dev_read(5d01,ffff8000231093c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023109210) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e8c2418,ffff8000231093c8,10,fffffd807f7bf780) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066ae8b60,ffff8000231093c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800023f13888,f0,ffff8000231093c8,0,ffff8000231094b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800023f13888,ffff800023109460,ffff8000231094b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023109530) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023109530) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1d80a171c30, count: -8 ddb{0}> show registers rdi 0 rsi 0x3da rbp 0xffff800023109150 rbx 0xfffffd0000000000 rdx 0x242 rcx 0xffff800000ad86c0 rax 0xffffffff812c8053 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0x4128edf2c1ab9577 r11 0x9284c114ae58f88d r12 0 r13 0x3da r14 0xffff800000af6660 r15 0xffff8000231093c8 rip 0xffffffff812c8058 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000231090f0 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{0}> show proc PROC (syz-executor.1) pid=406444 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800023f13af8,0xffffffff828b7070 process=0xffff800020ee4bb8 user=0xffff800023104000, vmspace=0xfffffd807efff8a0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 44842 223004 65639 0 7 0 syz-executor.1 *44842 406444 65639 0 7 0x4000000 syz-executor.1 6891 15716 0 0 3 0x14280 nfsidl nfsio 35224 210112 0 0 3 0x14280 nfsidl nfsio 27141 141747 0 0 3 0x14280 nfsidl nfsio 68036 503181 0 0 3 0x14280 nfsidl nfsio 83418 106776 0 0 3 0x14280 nfsidl nfsio 85648 65551 0 0 3 0x14280 nfsidl nfsio 2102 271550 0 0 3 0x14280 nfsidl nfsio 19327 318229 0 0 3 0x14280 nfsidl nfsio 22356 300600 0 0 3 0x14280 nfsidl nfsio 82844 356346 0 0 3 0x14280 nfsidl nfsio 57693 237307 0 0 3 0x14280 nfsidl nfsio 87529 514017 0 0 3 0x14280 nfsidl nfsio 46761 387469 0 0 3 0x14280 nfsidl nfsio 34572 153584 0 0 3 0x14280 nfsidl nfsio 53144 204119 0 0 3 0x14280 nfsidl nfsio 72182 477347 0 0 3 0x14280 nfsidl nfsio 12541 384903 0 0 3 0x14280 nfsidl nfsio 97951 81121 0 0 3 0x14280 nfsidl nfsio 99150 453868 0 0 3 0x14280 nfsidl nfsio 85559 218250 0 0 3 0x14280 nfsidl nfsio 65639 266039 92808 0 2 0x482 syz-executor.1 43233 50509 92808 0 2 0x2 syz-executor.0 92808 119791 87854 0 2 0x482 syz-fuzzer 92808 302963 87854 0 2 0x4000482 syz-fuzzer 92808 284957 87854 0 3 0x4000082 thrsleep syz-fuzzer 92808 342250 87854 0 3 0x4000082 thrsleep syz-fuzzer 92808 84253 87854 0 3 0x4000082 thrsleep syz-fuzzer 92808 501469 87854 0 3 0x4000082 kqread syz-fuzzer 92808 425409 87854 0 3 0x4000082 thrsleep syz-fuzzer 92808 221023 87854 0 3 0x4000082 thrsleep syz-fuzzer 92808 144346 87854 0 3 0x4000082 thrsleep syz-fuzzer 92808 320896 87854 0 3 0x4000082 thrsleep syz-fuzzer 87854 8965 86039 0 3 0x10008a pause ksh 86039 85819 65394 0 3 0x92 select sshd 64320 450244 1 0 3 0x100083 ttyin getty 65394 463741 1 0 3 0x80 select sshd 15146 412239 46353 74 2 0x100492 pflogd 46353 216495 1 0 3 0x80 netio pflogd 39162 78628 14437 73 3 0x100090 kqread syslogd 14437 56774 1 0 3 0x100082 netio syslogd 48208 383136 1 77 3 0x100090 poll dhclient 4568 389589 1 0 3 0x80 poll dhclient 64830 451409 0 0 3 0x14200 bored smr 67026 90551 0 0 3 0x14200 pgzero zerothread 15897 78453 0 0 3 0x14200 aiodoned aiodoned 91893 80444 0 0 3 0x14200 syncer update 88507 245316 0 0 3 0x14200 cleaner cleaner 75595 199017 0 0 3 0x14200 reaper reaper 72664 9594 0 0 3 0x14200 pgdaemon pagedaemon 8751 80348 0 0 3 0x14200 bored crynlk 41606 336905 0 0 3 0x14200 bored crypto 92639 522268 0 0 3 0x40014200 acpi0 acpi0 79545 147746 0 0 3 0x40014200 idle1 54650 337641 0 0 3 0x14200 bored softnet 8682 519984 0 0 3 0x14200 bored systqmp 93638 483310 0 0 3 0x14200 bored systq 69745 251219 0 0 2 0x40014200 softclock 80627 357628 0 0 3 0x40014200 idle0 1 63255 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 44842 (syz-executor.1) thread 0xffff800023f13888 (406444) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82896708) #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 Process 43233 (syz-executor.0) thread 0xffff800020dddad8 (50509) exclusive rrwlock inode r = 0 (0xfffffd806b214d58) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1358 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:3051 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806b2144d8) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:311 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:603 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:575 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3036 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9504 6598K 7116K 78643K 10867 0 pcb 13 8K 8K 78643K 28 0 rtable 109 4K 5K 78643K 240 0 ifaddr 57 12K 13K 78643K 66 0 counters 43 33K 34K 78643K 45 0 ioctlops 0 0K 4K 78643K 1475 0 iov 0 0K 12K 78643K 55 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1299 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 11 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 115 0 proc 61 63K 95K 78643K 453 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 27 0 in_multi 43 2K 2K 78643K 51 0 ether_multi 1 0K 0K 78643K 1 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 214 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 122 23K 23K 78643K 1280 0 UVM aobj 6 4K 4K 78643K 6 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 4 0 NDP 8 0K 0K 78643K 14 0 temp 86 3848K 3912K 78643K 3142 0 kqueue 3 4K 6K 78643K 4 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 7 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 21 0 19 1 0 1 1 0 8 0 rtentry 112 50 0 8 2 0 2 2 0 8 0 unpcb 120 69 0 59 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 47 0 47 2 2 0 1 0 8 0 tcpcb 544 45 0 41 1 0 1 1 0 8 0 inpcb 280 113 0 106 2 0 2 2 0 8 1 nd6 48 7 0 3 1 0 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 3 0 1 1 0 1 1 0 8 0 pfstitem 24 13 0 0 1 0 1 1 0 8 0 pfstkey 112 13 0 0 1 0 1 1 0 8 0 pfstate 328 13 0 0 2 0 2 2 0 8 0 pfrule 1360 23 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 218 0 40 13 0 13 13 0 8 0 art_table 32 219 0 40 2 0 2 2 0 8 0 art_node 16 49 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 7 0 0 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1550 0 144 89 0 89 89 0 8 0 ffsino 272 1550 0 144 95 1 94 95 0 8 0 nchpl 144 1915 0 305 60 0 60 60 0 8 0 uvmvnodes 72 1654 0 0 31 0 31 31 0 8 0 vnodes 208 1654 0 0 88 0 88 88 0 8 0 namei 1024 5128 0 5127 1 0 1 1 0 8 0 percpumem 16 33 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 scxspl 192 5874 0 5874 8 1 7 7 0 8 7 plimitpl 152 21 0 13 1 0 1 1 0 8 0 sigapl 424 350 0 299 6 0 6 6 0 8 0 futexpl 56 1527 0 1527 1 0 1 1 0 8 1 knotepl 112 63 0 44 1 0 1 1 0 8 0 kqueuepl 144 13 0 10 1 0 1 1 0 8 0 pipelkpl 48 87 0 77 1 0 1 1 0 8 0 pipepl 120 174 0 155 1 0 1 1 0 8 0 fdescpl 496 315 0 299 3 0 3 3 0 8 0 filepl 152 1708 0 1607 5 0 5 5 0 8 1 lockfpl 104 77 0 76 1 0 1 1 0 8 0 lockfspl 48 22 0 21 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 18 0 7 1 0 1 1 0 8 0 ucredpl 96 168 0 158 1 0 1 1 0 8 0 zombiepl 144 299 0 299 1 0 1 1 0 8 1 processpl 984 350 0 299 7 0 7 7 0 8 0 procpl 624 534 0 473 6 0 6 6 0 8 0 sockpl 400 203 0 184 4 1 3 4 0 8 1 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 167 0 0 20 0 20 20 0 8 0 mtagpl 80 29 0 0 1 0 1 1 0 8 0 mbufpl 256 197 0 0 12 0 12 12 0 8 0 bufpl 280 3687 0 133 254 0 254 254 0 8 0 anonpl 16 47458 0 32663 79 1 78 78 0 124 16 amapchunkpl 152 1472 0 1320 9 2 7 9 0 158 0 amappl16 192 1494 0 709 53 6 47 53 0 8 7 amappl15 184 40 0 37 1 0 1 1 0 8 0 amappl14 176 68 0 63 1 0 1 1 0 8 0 amappl13 168 28 0 25 1 0 1 1 0 8 0 amappl12 160 46 0 45 2 1 1 1 0 8 0 amappl11 152 57 0 41 1 0 1 1 0 8 0 amappl10 144 20 0 14 1 0 1 1 0 8 0 amappl9 136 388 0 385 1 0 1 1 0 8 0 amappl8 128 348 0 315 2 0 2 2 0 8 0 amappl7 120 119 0 108 1 0 1 1 0 8 0 amappl6 112 28 0 25 1 0 1 1 0 8 0 amappl5 104 177 0 161 1 0 1 1 0 8 0 amappl4 96 529 0 501 1 0 1 1 0 8 0 amappl3 88 145 0 139 1 0 1 1 0 8 0 amappl2 80 1567 0 1495 2 0 2 2 0 8 0 amappl1 72 16752 0 16311 23 13 10 18 0 8 0 amappl 80 765 0 718 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 0 1 0 1 1 0 8 0 uaddrrnd 24 315 0 299 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 315 0 299 1 0 1 1 0 8 0 vmmpekpl 168 6468 0 6433 2 0 2 2 0 8 0 vmmpepl 168 45428 0 43486 112 8 104 109 0 357 17 vmsppl 368 314 0 299 2 0 2 2 0 8 0 pdppl 4096 637 0 598 6 0 6 6 0 8 1 pvpl 32 157695 0 139656 186 0 186 186 0 265 38 pmappl 232 314 0 299 2 1 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 261 0 5 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace tun_dev_read(5d01,ffff8000231093c8,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800023109210) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e8c2418,ffff8000231093c8,10,fffffd807f7bf780) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8066ae8b60,ffff8000231093c8,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800023f13888,f0,ffff8000231093c8,0,ffff8000231094b0) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800023f13888,ffff800023109460,ffff8000231094b0) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800023109530) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800023109530) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1d80a171c30, 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(ffffffff82896500) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82896500) at __mp_lock+0x127 sys/kern/kern_lock.c:147 uvm_map_inentry(ffff800023f13af8,ffff800023f13b70,1d5ef3790ba,ffffffff82400ce6,ffffffff81e644b0,1c) at uvm_map_inentry+0xbe sys/uvm/uvm_map.c:1890 syscall(ffff800020ee3530) at syscall+0x3dc mi_syscall sys/sys/syscall_mi.h:87 [inline] syscall(ffff800020ee3530) at syscall+0x3dc sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe4420, count: -7