uvm_fault(0xffffffff828aca30, 0xfffffd0000000008, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ml_dequeue+0x28: movq 0x8(%r14),%rax ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic kernel page fault uvm_fault(0xffffffff828aca30, 0xfffffd0000000008, 0, 1) -> e ml_dequeue(ffff800000b12648) at ml_dequeue+0x28 sys/kern/uipc_mbuf.c:1597 end trace frame: 0xffff800021f1d770, count: 0 ddb{0}> trace ml_dequeue(ffff800000b12648) at ml_dequeue+0x28 sys/kern/uipc_mbuf.c:1597 ifq_deq_sleep(ffff800000af3a78,ffff800021f1d788,10,117,ffffffff82427d01,ffff800000af3e7c) at ifq_deq_sleep+0x118 sys/net/ifq.c:475 tun_dev_read(5d01,ffff800021f1da58,10) at tun_dev_read+0xd6 sys/net/if_tun.c:775 spec_read(ffff800021f1d8a0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806eceb0d8,ffff800021f1da58,10,fffffd807f7bf7e0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd807d2880b8,ffff800021f1da58,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e38878,f0,ffff800021f1da58,0,ffff800021f1db40) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e38878,ffff800021f1daf0,ffff800021f1db40) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f1dbc0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f1dbc0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe33d0ca3f90, count: -10 ddb{0}> show registers rdi 0xffffffff821c1e40 ml_dequeue+0x20 rsi 0x134 rbp 0xffff800021f1d6c0 rbx 0xfffffd0000000000 rdx 0x135 rcx 0xffff8000230d4000 rax 0xffff8000230d4000 r8 0xffffffff82427d01 pp_r600_decoded_lanes+0x6850 r9 0xffff800000af3e7c r10 0xa r11 0x668350b9328b6a9d r12 0x117 r13 0xffff800000af3e7c r14 0xfffffd0000000000 r15 0xffff800000b12648 rip 0xffffffff821c1e48 ml_dequeue+0x28 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff800021f1d690 ss 0x10 ml_dequeue+0x28: movq 0x8(%r14),%rax ddb{0}> show proc PROC (syz-executor.1) pid=69237 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020e37c48,0xffffffff8292eea0 process=0xffff800020df1370 user=0xffff800021f18000, vmspace=0xfffffd807effea10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 8294 219498 96160 0 2 0 syz-executor.1 * 8294 69237 96160 0 7 0x4000000 syz-executor.1 85644 263714 41722 0 7 0 syz-executor.0 85644 183416 41722 0 2 0x4000000 syz-executor.0 96160 48446 25295 0 3 0x82 nanosleep syz-executor.1 41722 359575 25295 0 3 0x82 nanosleep syz-executor.0 25295 427337 93870 0 3 0x82 thrsleep syz-fuzzer 25295 348849 93870 0 3 0x4000082 nanosleep syz-fuzzer 25295 520784 93870 0 3 0x4000082 thrsleep syz-fuzzer 25295 138636 93870 0 3 0x4000082 thrsleep syz-fuzzer 25295 226740 93870 0 3 0x4000082 thrsleep syz-fuzzer 25295 419576 93870 0 3 0x4000082 thrsleep syz-fuzzer 25295 372475 93870 0 3 0x4000082 thrsleep syz-fuzzer 25295 188017 93870 0 3 0x4000082 thrsleep syz-fuzzer 25295 225674 93870 0 3 0x4000082 kqread syz-fuzzer 25295 522873 93870 0 3 0x4000082 thrsleep syz-fuzzer 93870 156474 58946 0 3 0x10008a pause ksh 58946 487030 59742 0 3 0x92 select sshd 62047 190961 1 0 3 0x100083 ttyin getty 59742 309571 1 0 3 0x80 select sshd 10508 160689 80699 74 3 0x100092 bpf pflogd 80699 46786 1 0 3 0x80 netio pflogd 49069 4425 74199 73 3 0x100090 kqread syslogd 74199 363276 1 0 3 0x100082 netio syslogd 81646 159850 1 77 3 0x100090 poll dhclient 91445 79972 1 0 3 0x80 poll dhclient 6563 455529 0 0 3 0x14200 bored smr 51809 249475 0 0 2 0x14200 zerothread 93322 104265 0 0 3 0x14200 aiodoned aiodoned 34948 174324 0 0 3 0x14200 syncer update 17531 277509 0 0 3 0x14200 cleaner cleaner 45318 469533 0 0 3 0x14200 reaper reaper 47797 426046 0 0 3 0x14200 pgdaemon pagedaemon 61905 463027 0 0 3 0x14200 bored crynlk 55909 265192 0 0 3 0x14200 bored crypto 54959 354930 0 0 3 0x40014200 acpi0 acpi0 98613 451878 0 0 3 0x40014200 idle1 2305 111379 0 0 3 0x14200 bored softnet 26592 397436 0 0 3 0x14200 bored systqmp 62923 319442 0 0 3 0x14200 bored systq 33008 471356 0 0 3 0x40014200 bored softclock 8400 36712 0 0 3 0x40014200 idle0 1 44948 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &ifq->ifq_mtx r = 0 (0xffff800000af3aa0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 ifq_deq_sleep+0x4c sys/net/ifq.c:468 #4 tun_dev_read+0xd6 sys/net/if_tun.c:775 #5 spec_read+0xf1 sys/kern/spec_vnops.c:222 #6 VOP_READ+0xbf sys/kern/vfs_vops.c:247 #7 vn_read+0x124 sys/kern/vfs_vnops.c:375 #8 dofilereadv+0x1a1 sys/kern/sys_generic.c:237 #9 sys_read+0x83 sys/kern/sys_generic.c:157 #10 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #11 Xsyscall+0x128 Process 8294 (syz-executor.1) thread 0xffff800020e38878 (69237) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff828c5528) #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 exclusive mutex &ifq->ifq_mtx r = 0 (0xffff800000af3aa0) #0 witness_lock+0x4c7 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4c7 sys/kern/subr_witness.c:1164 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 ifq_deq_sleep+0x4c sys/net/ifq.c:468 #4 tun_dev_read+0xd6 sys/net/if_tun.c:775 #5 spec_read+0xf1 sys/kern/spec_vnops.c:222 #6 VOP_READ+0xbf sys/kern/vfs_vops.c:247 #7 vn_read+0x124 sys/kern/vfs_vnops.c:375 #8 dofilereadv+0x1a1 sys/kern/sys_generic.c:237 #9 sys_read+0x83 sys/kern/sys_generic.c:157 #10 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #11 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9493 6410K 6672K 78643K 10913 0 pcb 13 8K 8K 78643K 67 0 rtable 115 4K 5K 78643K 372 0 ifaddr 60 12K 13K 78643K 105 0 sysctl 2 0K 0K 78643K 4 0 counters 43 33K 34K 78643K 51 0 ioctlops 0 0K 4K 78643K 1490 0 iov 0 0K 16K 78643K 50 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1336 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 89 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 330 0 sigio 0 0K 0K 78643K 6 0 proc 60 63K 95K 78643K 491 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 419 0 in_multi 44 2K 3K 78643K 137 0 ether_multi 1 0K 0K 78643K 2 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 37 175K 175K 78643K 37 0 exec 0 0K 1K 78643K 228 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 120 39K 39K 78643K 2015 0 UVM aobj 11 2K 2K 78643K 11 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 30 0 NDP 9 0K 0K 78643K 30 0 temp 104 3858K 3922K 78643K 4457 0 kqueue 3 4K 8K 78643K 10 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 10 0 4 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 86 0 39 2 0 2 2 0 8 0 unpcb 120 131 0 121 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 9 0 9 1 1 0 1 0 8 0 tcpcb 544 319 0 311 1 0 1 1 0 8 0 inpcb 296 723 0 710 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 27 0 19 1 0 1 1 0 8 0 pffrag 232 4 0 4 2 1 1 1 0 482 1 pffrnode 88 4 0 4 2 1 1 1 0 8 1 pffrent 40 94 0 94 2 1 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 9 0 9 2 1 1 1 0 8 1 pfstitem 24 37 0 6 1 0 1 1 0 8 0 pfstkey 112 37 0 6 1 0 1 1 0 8 0 pfstate 328 37 0 6 3 0 3 3 0 8 0 pfrule 1360 24 0 18 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 322 0 103 15 1 14 14 0 8 0 art_table 32 323 0 103 2 0 2 2 0 8 0 art_node 16 85 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 18 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 86 0 76 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1770 0 365 89 1 88 89 0 8 0 ffsino 272 1770 0 365 96 2 94 95 0 8 0 nchpl 144 2390 0 794 60 0 60 60 0 8 0 uvmvnodes 72 1908 0 0 35 0 35 35 0 8 0 vnodes 208 1908 0 0 101 0 101 101 0 8 0 namei 1024 6359 0 6359 2 1 1 1 0 8 1 percpumem 16 36 0 4 1 0 1 1 0 8 0 vcpupl 1984 1 0 0 1 0 1 1 0 8 0 vmpool 560 1 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 3 0 3 2 1 1 1 0 8 1 scxspl 192 7309 0 7309 8 7 1 7 0 8 1 plimitpl 152 38 0 30 1 0 1 1 0 8 0 sigapl 424 542 0 510 4 0 4 4 0 8 0 futexpl 56 4293 0 4293 1 0 1 1 0 8 1 knotepl 112 83 0 64 1 0 1 1 0 8 0 kqueuepl 144 28 0 26 1 0 1 1 0 8 0 pipepl 304 105 0 95 2 1 1 2 0 8 0 fdescpl 496 527 0 510 3 0 3 3 0 8 0 filepl 152 2834 0 2728 6 1 5 5 0 8 0 lockfpl 104 54 0 53 1 0 1 1 0 8 0 lockfspl 48 20 0 19 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 23 0 12 1 0 1 1 0 8 0 ucredpl 96 184 0 175 1 0 1 1 0 8 0 zombiepl 144 510 0 510 2 1 1 1 0 8 1 processpl 992 542 0 510 6 1 5 5 0 8 1 procpl 624 1193 0 1150 4 0 4 4 0 8 0 sockpl 400 887 0 862 6 3 3 4 0 8 0 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 192 0 0 23 0 23 23 0 8 0 mtagpl 96 33 0 0 1 0 1 1 0 8 0 mbufpl 256 552 0 0 33 0 33 33 0 8 0 bufpl 280 4001 0 132 277 0 277 277 0 8 0 anonpl 16 79436 0 62442 85 1 84 84 0 124 11 amapchunkpl 152 3069 0 2906 14 7 7 14 0 158 0 amappl16 192 2786 0 1854 67 8 59 59 0 8 12 amappl15 184 9 0 8 2 1 1 1 0 8 0 amappl14 176 171 0 165 1 0 1 1 0 8 0 amappl13 168 74 0 71 1 0 1 1 0 8 0 amappl12 160 49 0 46 1 0 1 1 0 8 0 amappl11 152 209 0 191 1 0 1 1 0 8 0 amappl10 144 21 0 15 1 0 1 1 0 8 0 amappl9 136 478 0 475 1 0 1 1 0 8 0 amappl8 128 466 0 432 2 0 2 2 0 8 0 amappl7 120 125 0 113 1 0 1 1 0 8 0 amappl6 112 175 0 168 1 0 1 1 0 8 0 amappl5 104 238 0 221 1 0 1 1 0 8 0 amappl4 96 697 0 665 1 0 1 1 0 8 0 amappl3 88 152 0 147 1 0 1 1 0 8 0 amappl2 80 3166 0 3091 2 0 2 2 0 8 0 amappl1 72 24864 0 24403 23 13 10 18 0 8 0 amappl 80 1466 0 1418 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 528 0 510 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 528 0 510 1 0 1 1 0 8 0 vmmpekpl 168 7989 0 7955 2 0 2 2 0 8 0 vmmpepl 168 75796 0 73586 131 13 118 128 0 357 21 vmsppl 368 527 0 510 2 0 2 2 0 8 0 pdppl 4096 1063 0 1021 7 1 6 6 0 8 0 pvpl 32 230198 0 209950 202 4 198 198 0 265 30 pmappl 232 527 0 510 3 1 2 2 0 8 1 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 290 0 11 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ml_dequeue(ffff800000b12648) at ml_dequeue+0x28 sys/kern/uipc_mbuf.c:1597 ifq_deq_sleep(ffff800000af3a78,ffff800021f1d788,10,117,ffffffff82427d01,ffff800000af3e7c) at ifq_deq_sleep+0x118 sys/net/ifq.c:475 tun_dev_read(5d01,ffff800021f1da58,10) at tun_dev_read+0xd6 sys/net/if_tun.c:775 spec_read(ffff800021f1d8a0) at spec_read+0xf1 sys/kern/spec_vnops.c:222 VOP_READ(fffffd806eceb0d8,ffff800021f1da58,10,fffffd807f7bf7e0) at VOP_READ+0xbf sys/kern/vfs_vops.c:247 vn_read(fffffd807d2880b8,ffff800021f1da58,0) at vn_read+0x124 sys/kern/vfs_vnops.c:375 dofilereadv(ffff800020e38878,f0,ffff800021f1da58,0,ffff800021f1db40) at dofilereadv+0x1a1 sys/kern/sys_generic.c:237 sys_read(ffff800020e38878,ffff800021f1daf0,ffff800021f1db40) at sys_read+0x83 sys/kern/sys_generic.c:157 syscall(ffff800021f1dbc0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021f1dbc0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe33d0ca3f90, count: -10 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 sys_clock_gettime(ffff800020e37eb8,ffff800021ee9140,ffff800021ee9190) at sys_clock_gettime+0x67 sys/kern/kern_time.c:168 syscall(ffff800021ee9210) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021ee9210) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffde4c0, count: -6