uvm_fault(0xffffffff82564468, 0xfffffd0000000008, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ml_purge+0x38: movq 0x8(%r12),%r12 ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xffffffff82564468, 0xfffffd0000000008, 0, 1) -> e ml_purge(ffff80001493dfc8) at ml_purge+0x38 sys/kern/uipc_mbuf.c:1627 end trace frame: 0xffff80001493e010, count: 0 ddb> trace ml_purge(ffff80001493dfc8) at ml_purge+0x38 sys/kern/uipc_mbuf.c:1627 ifq_purge(ffff800000a65a78) at ifq_purge+0x97 sys/net/ifq.c:423 tapclose(5d01,7,2000,ffff8000ffff8770) at tapclose+0xed tun_dev_close sys/net/if_tun.c:454 [inline] tapclose(5d01,7,2000,ffff8000ffff8770) at tapclose+0xed sys/net/if_tun.c:433 spec_close(ffff80001493e0e0) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd803e747b60,7,fffffd803f7c6b40,ffff8000ffff8770) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd802d73cd30,ffff8000ffff8770) at vn_closefile+0xd3 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd802d73cd30,ffff8000ffff8770) at vn_closefile+0xd3 sys/kern/vfs_vnops.c:610 fdrop(fffffd802d73cd30,ffff8000ffff8770) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd802d73cd30,ffff8000ffff8770) at closef+0x118 sys/kern/kern_descrip.c:1257 fdfree(ffff8000ffff8770) at fdfree+0x100 sys/kern/kern_descrip.c:1189 exit1(ffff8000ffff8770,19,1) at exit1+0x32f sys/kern/kern_exit.c:196 postsig(ffff8000ffff8770,19) at postsig+0x4a6 sigexit sys/kern/kern_sig.c:1499 [inline] postsig(ffff8000ffff8770,19) at postsig+0x4a6 sys/kern/kern_sig.c:1431 userret(ffff8000ffff8770) at userret+0x159 sys/kern/kern_sig.c:1889 syscall(ffff80001493e560) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:115 [inline] syscall(ffff80001493e560) at syscall+0x42e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbbeb0, count: -14 ddb> show registers rdi 0 rsi 0 rbp 0xffff80001493dfb0 rbx 0 rdx 0xffffffff8256ae78 mbpool+0x38 rcx 0xffffffff8256ae70 mbpool+0x30 rax 0 r8 0 r9 0x5 r10 0x5ba31b2902dfedab r11 0x987766c39c149b2d r12 0xfffffd0000000000 r13 0x2000 __ALIGN_SIZE+0x1000 r14 0xffff80001493dfc8 r15 0xfffffd0000000000 rip 0xffffffff811380f8 ml_purge+0x38 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001493df80 ss 0x10 ml_purge+0x38: movq 0x8(%r12),%r12 ddb> show proc PROC (syz-executor.1) pid=510495 stat=onproc flags process=a proc=2000 pri=74, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8280,0xffff8000ffff2518 process=0xffff8000148a2018 user=0xffff800014939000, vmspace=0xfffffd803f011220 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 93365 342730 39914 0 2 0x480 syz-executor.0 93365 458923 39914 0 3 0x4000080 ttyin syz-executor.0 93365 443882 39914 0 3 0x4000080 fsleep syz-executor.0 24846 191638 0 0 3 0x14200 bored sosplice 45481 186502 0 0 3 0x14200 acct acct 39914 316516 14769 0 2 0x482 syz-executor.0 14769 59087 7344 0 3 0x82 thrsleep syz-fuzzer 14769 338427 7344 0 2 0x4000482 syz-fuzzer 14769 125860 7344 0 3 0x4000082 thrsleep syz-fuzzer 14769 198898 7344 0 3 0x4000082 thrsleep syz-fuzzer 14769 270842 7344 0 3 0x4000082 thrsleep syz-fuzzer 14769 303972 7344 0 2 0x4000082 syz-fuzzer 14769 342013 7344 0 3 0x4000082 thrsleep syz-fuzzer 7344 106152 68336 0 3 0x10008a pause ksh 68336 402771 46350 0 3 0x92 select sshd 88069 167468 1 0 3 0x100083 ttyin getty 46350 405129 1 0 3 0x80 select sshd 95300 189186 71461 73 3 0x100090 kqread syslogd 71461 75534 1 0 3 0x100082 netio syslogd 72157 396086 1 77 3 0x100090 poll dhclient 56025 183720 1 0 3 0x80 poll dhclient 83639 179780 0 0 2 0x14200 zerothread 38411 186060 0 0 3 0x14200 aiodoned aiodoned 77095 311301 0 0 3 0x14200 syncer update 99144 256776 0 0 3 0x14200 cleaner cleaner 47055 242136 0 0 3 0x14200 reaper reaper 39775 6955 0 0 3 0x14200 pgdaemon pagedaemon 90401 15437 0 0 3 0x14200 bored crynlk 76926 88885 0 0 3 0x14200 bored crypto 55735 380922 0 0 3 0x40014200 acpi0 acpi0 93028 351649 0 0 2 0x14200 softnet 27181 169395 0 0 3 0x14200 bored systqmp 45876 375305 0 0 3 0x14200 bored systq 47654 106624 0 0 3 0x40014200 bored softclock 2672 72687 0 0 3 0x40014200 idle0 22655 215441 0 0 3 0x14200 bored smr 1 387234 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9494 6412K 7109K 78643K 11410 0 0 pcb 13 8K 8K 78643K 57 0 0 rtable 104 3K 4K 78643K 244 0 0 ifaddr 68 14K 14K 78643K 92 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 29 0 0 iov 0 0K 24K 78643K 90 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1218 77K 77K 78643K 1436 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 7 0 0 VM map 10 2K 2K 78643K 10 0 0 sem 12 0K 1K 78643K 82 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 5 13K 25K 78643K 221 0 0 sigio 0 0K 0K 78643K 6 0 0 proc 48 38K 63K 78643K 368 0 0 subproc 23 1K 2K 78643K 34 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 33 0 0 in_multi 59 3K 3K 78643K 63 0 0 ether_multi 1 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 217 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 117 88K 88K 78643K 1421 0 0 UVM aobj 16 4K 4K 78643K 16 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 42 0 0 NDP 10 0K 0K 78643K 17 0 0 temp 128 3540K 3604K 78643K 6517 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 8 0 2 1 0 1 1 0 8 0 rtpcb 80 46 0 44 1 0 1 1 0 8 0 rtentry 112 49 0 7 2 0 2 2 0 8 0 unpcb 120 180 0 172 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 89 0 89 1 1 0 1 0 8 0 tcpcb 544 169 0 165 1 0 1 1 0 8 0 ipq 40 6 0 6 1 0 1 1 0 8 1 ipqe 40 188 0 188 1 0 1 1 0 8 1 inpcb 280 571 0 564 2 0 2 2 0 8 1 nd6 48 4 0 0 1 0 1 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 220 0 4 14 0 14 14 0 8 0 art_table 32 221 0 4 2 0 2 2 0 8 0 art_node 16 48 0 10 1 0 1 1 0 8 0 sysvmsgpl 40 60 0 28 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 80 0 70 1 0 1 1 0 8 0 shmpl 112 14 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1721 0 323 46 0 46 46 0 8 0 ffsino 240 1721 0 323 83 0 83 83 0 8 0 nchpl 144 2270 0 1813 60 36 24 60 0 8 4 uvmvnodes 72 1941 0 0 36 0 36 36 0 8 0 vnodes 208 1941 0 0 103 0 103 103 0 8 0 namei 1024 6004 0 6004 1 0 1 1 0 8 1 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 520 8 0 0 1 0 1 1 0 8 0 scxspl 192 6522 0 6522 8 7 1 7 0 8 1 plimitpl 152 35 0 27 1 0 1 1 0 8 0 sigapl 432 391 0 378 2 0 2 2 0 8 0 futexpl 56 6990 0 6989 1 0 1 1 0 8 0 knotepl 112 78 0 58 1 0 1 1 0 8 0 kqueuepl 104 75 0 72 1 0 1 1 0 8 0 pipepl 128 222 0 204 2 0 2 2 0 8 1 fdescpl 424 392 0 378 2 0 2 2 0 8 0 filepl 120 2887 0 2798 5 0 5 5 0 8 1 lockfpl 104 103 0 102 1 0 1 1 0 8 0 lockfspl 48 38 0 37 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 199 0 192 1 0 1 1 0 8 0 zombiepl 144 379 0 378 1 0 1 1 0 8 0 processpl 864 408 0 378 4 0 4 4 0 8 0 procpl 632 696 0 658 5 0 5 5 0 8 1 sosppl 128 4 0 4 2 1 1 1 0 8 1 sockpl 384 797 0 780 5 0 5 5 0 8 3 mcl64k 65536 34 0 34 1 0 1 1 0 8 1 mcl16k 16384 5 0 4 2 1 1 1 0 8 0 mcl12k 12288 7 0 7 2 1 1 1 0 8 1 mcl9k 9216 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 15 0 15 1 0 1 1 0 8 1 mcl4k 4096 31 0 31 2 1 1 1 0 8 1 mcl2k 2048 67731 0 67692 14 8 6 13 0 8 0 mtagpl 80 50 0 14 2 1 1 1 0 8 0 mbufpl 256 109970 0 109811 31 10 21 27 0 8 8 bufpl 256 6789 0 1846 310 0 310 310 0 8 0 anonpl 16 57419 0 37335 99 1 98 98 0 62 16 amapchunkpl 152 1865 0 1697 10 2 8 9 0 158 0 amappl16 192 2277 0 1172 68 4 64 68 0 8 8 amappl14 176 46 0 41 1 0 1 1 0 8 0 amappl13 168 91 0 88 1 0 1 1 0 8 0 amappl12 160 17 0 15 2 1 1 1 0 8 0 amappl11 152 46 0 35 1 0 1 1 0 8 0 amappl10 144 108 0 106 2 1 1 1 0 8 0 amappl9 136 572 0 568 1 0 1 1 0 8 0 amappl8 128 157 0 128 1 0 1 1 0 8 0 amappl7 120 130 0 127 1 0 1 1 0 8 0 amappl6 112 51 0 45 1 0 1 1 0 8 0 amappl5 104 137 0 126 1 0 1 1 0 8 0 amappl4 96 695 0 668 1 0 1 1 0 8 0 amappl3 88 120 0 114 1 0 1 1 0 8 0 amappl2 80 2354 0 2290 3 1 2 3 0 8 0 amappl1 72 16323 0 15915 27 18 9 20 0 8 0 amappl 80 945 0 896 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 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 400 0 378 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 400 0 378 1 0 1 1 0 8 0 vmmpekpl 168 6753 0 6726 2 0 2 2 0 8 0 vmmpepl 168 54376 0 52198 135 17 118 127 0 357 18 vmsppl 272 391 0 378 2 1 1 2 0 8 0 pdppl 4096 806 0 764 6 0 6 6 0 8 0 pvpl 32 174101 0 151190 221 0 221 221 0 265 34 pmappl 200 399 0 378 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 474 0 23 14 0 14 14 0 8 0