uvm_fault(0xffffffff82569498, 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(0xffffffff82569498, 0xfffffd0000000018, 0, 1) -> e tun_dev_read(5d01,ffff800022dbf438,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 end trace frame: 0xffff800022dbf270, count: 0 ddb{1}> trace tun_dev_read(5d01,ffff800022dbf438,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800022dbf280) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e517418,ffff800022dbf438,10,fffffd807f7bf600) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8068bf3dc0,ffff800022dbf438,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ece9d8,f0,ffff800022dbf438,0,ffff800022dbf520) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ece9d8,ffff800022dbf4d0,ffff800022dbf520) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800022dbf5a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022dbf5a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9e14d9d2ad0, count: -8 ddb{1}> show registers rdi 0 rsi 0x3da rbp 0xffff800022dbf1c0 rbx 0xfffffd0000000000 rdx 0x152 rcx 0xffff800000a41180 rax 0xffffffff8118eb93 tun_dev_read+0x133 r8 0x7f7fffffc000 r9 0x5 r10 0xda002b9851cd316 r11 0xde6f5e544f88b8b2 r12 0 r13 0x3da r14 0xffff800000a40e60 r15 0xffff800022dbf438 rip 0xffffffff8118eb98 tun_dev_read+0x138 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800022dbf160 ss 0x10 tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> show proc PROC (syz-executor.1) pid=233777 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff800020ecfae8,0xffffffff82661b48 process=0xffff800020f80f88 user=0xffff800022dba000, vmspace=0xfffffd806477d5e0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 84710 416397 2261 0 7 0 syz-executor.1 *84710 233777 2261 0 7 0x4000000 syz-executor.1 2261 192131 19799 0 3 0x82 nanosleep syz-executor.1 27942 143248 19799 0 3 0x2 biowait syz-executor.0 902 156635 1 0 3 0x100083 ttyin getty 71336 174569 0 0 3 0x14200 bored sosplice 19799 441929 81888 0 3 0x82 thrsleep syz-fuzzer 19799 135645 81888 0 3 0x4000082 nanosleep syz-fuzzer 19799 410116 81888 0 3 0x4000082 thrsleep syz-fuzzer 19799 275593 81888 0 3 0x4000082 thrsleep syz-fuzzer 19799 130865 81888 0 3 0x4000082 nanosleep syz-fuzzer 19799 254184 81888 0 3 0x4000082 thrsleep syz-fuzzer 19799 75805 81888 0 3 0x4000082 thrsleep syz-fuzzer 19799 260165 81888 0 3 0x4000082 thrsleep syz-fuzzer 19799 55910 81888 0 3 0x4000082 kqread syz-fuzzer 19799 499218 81888 0 3 0x4000082 thrsleep syz-fuzzer 81888 91887 99624 0 3 0x10008a pause ksh 99624 488432 65102 0 3 0x92 select sshd 65102 203565 1 0 3 0x80 select sshd 77842 271488 34483 74 3 0x100092 bpf pflogd 34483 310561 1 0 3 0x80 netio pflogd 5466 218457 65352 73 3 0x100090 kqread syslogd 65352 436796 1 0 3 0x100082 netio syslogd 28650 448276 1 77 3 0x100090 poll dhclient 14462 222231 1 0 3 0x80 poll dhclient 38349 33215 0 0 3 0x14200 bored smr 61489 86045 0 0 3 0x14200 pgzero zerothread 59365 154889 0 0 3 0x14200 aiodoned aiodoned 66714 5336 0 0 3 0x14200 syncer update 97333 338016 0 0 3 0x14200 cleaner cleaner 82823 332373 0 0 3 0x14200 reaper reaper 26005 16599 0 0 3 0x14200 pgdaemon pagedaemon 44577 499418 0 0 3 0x14200 bored crynlk 83529 57747 0 0 3 0x14200 bored crypto 78455 76430 0 0 3 0x40014200 acpi0 acpi0 35795 389420 0 0 3 0x40014200 idle1 88297 160265 0 0 3 0x14200 bored softnet 79584 391402 0 0 3 0x14200 bored systqmp 33868 20490 0 0 3 0x14200 bored systq 42761 363623 0 0 3 0x40014200 bored softclock 48068 178773 0 0 3 0x40014200 idle0 1 261084 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 84710 (syz-executor.1) thread 0xffff800020ece9d8 (233777) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff826561d0) #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 27942 (syz-executor.0) thread 0xffff800020ecf128 (143248) exclusive rrwlock inode r = 0 (0xfffffd806e421c50) #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 (0xfffffd806e514808) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9544 6433K 7462K 78643K 13855 0 pcb 14 8K 8K 78643K 210 0 rtable 85 3K 5K 78643K 533 0 ifaddr 89 16K 18K 78643K 191 0 counters 43 33K 34K 78643K 73 0 ioctlops 0 0K 4K 78643K 1539 0 iov 0 0K 16K 78643K 120 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 2153 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 121 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 5 13K 25K 78643K 805 0 sigio 0 0K 0K 78643K 16 0 proc 62 63K 83K 78643K 602 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 448 0 in_multi 55 2K 3K 78643K 254 0 ether_multi 1 0K 0K 78643K 39 0 mrt 0 0K 0K 78643K 17 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 295 0 pfkey data 0 0K 1K 78643K 5 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 152 154K 154K 78643K 3769 0 UVM aobj 27 4K 4K 78643K 29 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 167 0 NDP 15 0K 0K 78643K 41 0 temp 144 3055K 3134K 78643K 14935 0 kqueue 3 4K 10K 78643K 58 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 12 0 5 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 434 0 432 1 0 1 1 0 8 0 rtentry 112 95 0 64 3 1 2 2 0 8 0 unpcb 120 507 0 497 1 0 1 1 0 8 0 syncache 264 11 0 11 3 2 1 1 0 8 1 tcpqe 32 345 0 345 2 2 0 1 0 8 0 tcpcb 544 349 0 343 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 2 0 2 1 1 0 1 0 8 0 inpcb 280 1224 0 1214 3 1 2 2 0 8 1 rttmr 72 6 0 6 3 3 0 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 3 0 3 1 1 0 1 0 8 0 nd6 48 19 0 19 1 0 1 1 0 8 1 pkpcb 40 10 0 10 5 5 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 pffrag 232 4 0 4 2 2 0 1 0 482 0 pffrnode 88 4 0 4 2 2 0 1 0 8 0 pffrent 40 96 0 96 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 pfstitem 24 77 0 35 1 0 1 1 0 8 0 pfstkey 112 77 0 35 2 0 2 2 0 8 0 pfstate 328 77 0 35 5 0 5 5 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 256 409 0 292 17 4 13 13 0 8 3 art_table 32 410 0 292 2 0 2 2 0 8 0 art_node 16 92 0 63 1 0 1 1 0 8 0 sysvmsgpl 40 111 0 83 1 0 1 1 0 8 0 semapl 112 118 0 108 1 0 1 1 0 8 0 shmpl 112 27 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2490 0 1086 91 2 89 89 0 8 0 ffsino 272 2490 0 1086 95 1 94 94 0 8 0 nchpl 144 3724 0 2134 60 0 60 60 0 8 0 uvmvnodes 72 3351 0 0 61 0 61 61 0 8 0 vnodes 208 3351 0 0 177 0 177 177 0 8 0 namei 1024 11474 0 11473 1 0 1 1 0 8 0 percpumem 16 47 0 15 1 0 1 1 0 8 0 vcpupl 1984 13 0 0 2 0 2 2 0 8 0 vmpool 560 21 0 8 1 0 1 1 0 8 0 scxspl 192 11272 0 11271 12 10 2 7 0 8 1 plimitpl 152 68 0 60 1 0 1 1 0 8 0 sigapl 424 1017 0 985 4 0 4 4 0 8 0 futexpl 56 14139 0 14139 1 0 1 1 0 8 1 knotepl 112 157 0 138 1 0 1 1 0 8 0 kqueuepl 144 135 0 129 1 0 1 1 0 8 0 pipelkpl 48 553 0 542 1 0 1 1 0 8 0 pipepl 120 1106 0 1085 1 0 1 1 0 8 0 fdescpl 496 1000 0 984 3 0 3 3 0 8 0 filepl 152 7411 0 7308 6 0 6 6 0 8 2 lockfpl 104 202 0 201 1 0 1 1 0 8 0 lockfspl 48 70 0 69 1 0 1 1 0 8 0 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 36 0 25 1 0 1 1 0 8 0 ucredpl 96 602 0 593 1 0 1 1 0 8 0 zombiepl 144 985 0 985 2 1 1 1 0 8 1 processpl 984 1017 0 985 6 1 5 5 0 8 0 procpl 624 2833 0 2791 5 1 4 5 0 8 0 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 29 0 28 1 0 1 1 0 8 0 sockpl 400 2179 0 2157 8 4 4 5 0 8 1 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 7 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 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 217 0 0 27 0 27 27 0 8 0 mtagpl 80 42 0 0 1 0 1 1 0 8 0 mbufpl 256 369 0 0 21 0 21 21 0 8 0 bufpl 280 5391 0 138 376 0 376 376 0 8 0 anonpl 16 106572 0 92298 79 18 61 75 0 124 0 amapchunkpl 152 7742 0 7591 27 11 16 20 0 158 9 amappl16 192 4402 0 3616 59 19 40 52 0 8 0 amappl15 184 151 0 149 2 1 1 1 0 8 0 amappl14 176 208 0 203 1 0 1 1 0 8 0 amappl13 168 214 0 212 1 0 1 1 0 8 0 amappl12 160 177 0 170 1 0 1 1 0 8 0 amappl11 152 61 0 45 1 0 1 1 0 8 0 amappl10 144 218 0 213 1 0 1 1 0 8 0 amappl9 136 522 0 521 1 0 1 1 0 8 0 amappl8 128 629 0 585 2 0 2 2 0 8 0 amappl7 120 333 0 320 1 0 1 1 0 8 0 amappl6 112 33 0 26 1 0 1 1 0 8 0 amappl5 104 875 0 857 1 0 1 1 0 8 0 amappl4 96 705 0 676 1 0 1 1 0 8 0 amappl3 88 300 0 294 1 0 1 1 0 8 0 amappl2 80 7036 0 6959 2 0 2 2 0 8 0 amappl1 72 31679 0 31244 23 13 10 18 0 8 0 amappl 80 3141 0 3086 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 28 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1021 0 992 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1021 0 992 1 0 1 1 0 8 0 vmmpekpl 168 13413 0 13379 2 0 2 2 0 8 0 vmmpepl 168 128769 0 126801 135 33 102 116 0 357 11 vmsppl 368 1020 0 992 5 2 3 3 0 8 0 pdppl 4096 2050 0 1997 10 3 7 7 0 8 0 pvpl 32 326404 0 309209 182 20 162 178 0 265 17 pmappl 232 1020 0 992 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 295 0 20 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(ffffffff82507ff0) 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(ffffffff82655fc8) at __mp_lock+0x127 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82655fc8) at __mp_lock+0x127 sys/kern/kern_lock.c:147 intr_handler(ffff800022db9900,ffff80000006ba00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:525 Xintr_ioapic_edge17_untramp() at Xintr_ioapic_edge17_untramp+0x19f clock_gettime(ffff800020ecfae8,3,ffff800022db9a28) at clock_gettime+0x4f sys/kern/kern_time.c:115 sys_clock_gettime(ffff800020ecfae8,ffff800022db9a90,ffff800022db9ae0) at sys_clock_gettime+0x4c sys/kern/kern_time.c:168 syscall(ffff800022db9b60) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022db9b60) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc2970, count: -10 ddb{0}> machine ddbcpu 1 Stopped at tun_dev_read+0x138: movl 0x18(%rbx),%r12d ddb{1}> trace tun_dev_read(5d01,ffff800022dbf438,10) at tun_dev_read+0x138 sys/net/if_tun.c:790 spec_read(ffff800022dbf280) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806e517418,ffff800022dbf438,10,fffffd807f7bf600) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd8068bf3dc0,ffff800022dbf438,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020ece9d8,f0,ffff800022dbf438,0,ffff800022dbf520) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020ece9d8,ffff800022dbf4d0,ffff800022dbf520) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800022dbf5a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022dbf5a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9e14d9d2ad0, count: -8