¹j¼õ¬|ÿ ž¨E1\…:uvm_fault(0xfffffd807538db80, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81427858 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80002a3692e0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81427858 Starting stack trace... panic(ffffffff833a078c) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a369230) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001486000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(31e5f,1,2000,ffff8000ffff3a00) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(31e5f,1,2000,ffff8000ffff3a00) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3693e0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8061d5c1d8,1,fffffd80097fb5b0,ffff8000ffff3a00) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80674a2df0,ffff8000ffff3a00) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80674a2df0,ffff8000ffff3a00) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd80674a2df0,ffff8000ffff3a00) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80674a2df0,ffff8000ffff3a00) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff8000ffff3a00) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffff3a00,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff8000ffff3a00,ffff80002a369750,ffff80002a3696a0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a369750) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a369750) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fb88b8cbe90, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 731 5984 0 0 0 1 syz-executor 187249 26117 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf10473ea60, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd807538db80, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf10473ea60, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c46fd50 rbx 0 rdx 0 rcx 0xffff8000ffff3768 rax 0x2a r8 0xffff80003c46fc80 r9 0x1 r10 0x398ef6bce515f5eb r11 0xc3145fabc7709244 r12 0 r13 0xffffffff826de728 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff830304c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c46fcd0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=731 pid=5984 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff3a00,0xffff800038c2fcc0 process=0xffff80003c4b7aa8 user=0xffff80003c46a000, vmspace=0xfffffd806b5ec5d8 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=0, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 5984 731 25414 0 7 0 syz-executor 5984 268589 25414 0 3 0x4000080 fsleep syz-executor 37722 342871 60673 0 3 0x80 nanoslp syz-executor 37722 157560 60673 0 3 0x4000080 ttyout syz-executor 37722 455430 60673 0 3 0x4000080 fsleep syz-executor 50605 468489 51224 0 3 0x80 nanoslp syz-executor 50605 398552 51224 0 3 0x4000000 biowait syz-executor 80124 230313 90240 0 3 0x80 nanoslp syz-executor 80124 324508 90240 0 3 0x4000080 kqsel syz-executor 80124 331647 90240 0 3 0x4000080 fsleep syz-executor 45475 492218 82575 60929 3 0x90 nanoslp syz-executor 45475 248783 82575 60929 3 0x4000090 nanoslp syz-executor 45475 124715 82575 60929 3 0x4000090 fsleep syz-executor 36012 154454 59934 0 3 0x80 nanoslp syz-executor 36012 475264 59934 0 3 0x4000080 kqpoll syz-executor 36012 5914 59934 0 3 0x4000080 fsleep syz-executor 68995 317052 32766 0 3 0x80 nanoslp syz-executor 68995 155598 32766 0 3 0x4000080 dtread syz-executor 68995 464232 32766 0 3 0x4000080 fsleep syz-executor 32766 77239 81971 0 3 0x82 nanoslp syz-executor 59018 488349 0 0 3 0x14200 acct acct 25414 358311 81971 0 3 0x82 nanoslp syz-executor 59934 317538 81971 0 3 0x82 nanoslp syz-executor 22803 99924 1 0 3 0x100083 ttyin getty 45505 79424 0 0 3 0x14200 bored sosplice 60673 146291 81971 0 3 0x82 nanoslp syz-executor 51224 359631 81971 0 3 0x82 nanoslp syz-executor 37749 242852 81971 0 3 0x82 nanoslp syz-executor 90240 229827 81971 0 3 0x82 nanoslp syz-executor 82575 4307 81971 0 3 0x82 nanoslp syz-executor 81971 64534 32952 0 3 0x82 kqread syz-executor 32952 176765 27651 0 3 0x10008a sigsusp ksh 27651 325552 91314 0 3 0x98 kqread sshd-session 91314 257656 68683 0 3 0x92 kqread sshd-session 68683 429962 1 0 3 0x88 kqread sshd 17156 374630 21887 74 3 0x1100092 bpf pflogd 21887 451644 1 0 3 0x80 sbwait pflogd 97317 11030 8117 73 3 0x1100090 kqread syslogd 8117 458013 1 0 3 0x100082 sbwait syslogd 86896 467120 1 0 3 0x100080 kqread resolvd 52584 248182 60053 77 3 0x100092 kqread dhcpleased 73556 127350 60053 77 3 0x100092 kqread dhcpleased 60053 355385 1 0 3 0x80 kqread dhcpleased 41691 456112 0 0 3 0x14200 bored smr 97234 398667 0 0 3 0x14200 pgzero zerothread 31521 510422 0 0 3 0x14200 aiodoned aiodoned 33424 357008 0 0 3 0x14200 syncer update 79642 297093 0 0 3 0x14200 cleaner cleaner 26117 187249 0 0 7 0x14200 reaper 96802 371158 0 0 3 0x14200 pgdaemon pagedaemon 3996 271502 0 0 3 0x14200 bored viomb 83770 136588 0 0 3 0x40014200 acpi0 acpi0 89118 374424 0 0 3 0x40014200 idle1 58405 18516 0 0 3 0x14200 bored softnet7 22934 181079 0 0 3 0x14200 bored softnet6 73502 95501 0 0 3 0x14200 bored softnet5 62279 490212 0 0 3 0x14200 bored softnet4 93106 298714 0 0 3 0x14200 bored softnet3 4006 449136 0 0 3 0x14200 bored softnet2 52854 176950 0 0 3 0x14200 bored softnet1 80089 204282 0 0 3 0x14200 bored softnet0 68223 408790 0 0 2 0x40014200 systqmp 83215 13282 0 0 3 0x14200 bored systq 82780 229897 0 0 3 0x14200 tmoslp softclockmp 36875 416275 0 0 3 0x40014200 tmoslp softclock 46298 520309 0 0 3 0x40014200 idle0 1 183835 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex procpl r = 0 (0xffffffff83930e60) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pool_put+0xa6 sys/kern/subr_pool.c:799 #4 reaper+0xc2 _atomic_dec_int sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:155 [inline] #4 reaper+0xc2 proc_free sys/kern/kern_exit.c:458 [inline] #4 reaper+0xc2 sys/kern/kern_exit.c:497 #5 proc_trampoline+0x10 Process 50605 (syz-executor) thread 0xffff800038c2e028 (398552) exclusive rrwlock inode r = 0 (0xfffffd806e213b88) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x18f sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x242 sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10266 11235K 12433K 166960K 15620 0 pcb 19 16K 18K 166960K 538 0 rtable 192 10K 10K 166960K 701 0 pf 40 18K 24K 166960K 288 0 ifaddr 39 7K 8K 166960K 171 0 ifgroup 62 2K 3K 166960K 316 0 sysctl 4 1K 9K 166960K 24 0 counters 70 37K 38K 166960K 592 0 ioctlops 0 0K 4K 166960K 2119 0 iov 0 0K 24K 166960K 136 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1513 95K 95K 166960K 3964 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 23 0 VM map 2 1K 1K 166960K 2 0 sem 15 29K 29K 166960K 218 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 236K 166960K 2654 0 sigio 2 0K 0K 166960K 113 0 proc 72 115K 147K 166960K 923 0 subproc 72 4K 4K 166960K 101 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 320 0 in_multi 76 5K 7K 166960K 208 0 ether_multi 1 0K 0K 166960K 16 0 mrt 1 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 259 1155K 1155K 166960K 259 0 exec 0 0K 1K 166960K 677 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 7 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 258 170K 192K 166960K 26028 0 UVM aobj 131 4K 4K 166960K 136 0 pinsyscall 43 86K 102K 166960K 3820 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 163 0 NDP 13 0K 2K 166960K 125 0 temp 80 8652K 8775K 166960K 133217 0 kqueue 14 22K 33K 166960K 505 0 SYN cache 2 8K 16K 166960K 3 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 263 0 260 1 0 1 1 0 8 0 rtentry 176 206 0 134 5 0 5 5 0 8 0 unpcb 144 1973 0 1953 15 13 2 4 0 8 1 syncache 336 8 0 8 3 3 0 1 0 8 0 tcpqe 32 5 0 5 1 1 0 1 0 8 0 tcpcb 736 897 0 891 24 23 1 7 0 8 0 arp 128 35 0 22 1 0 1 1 0 8 0 inpcb 328 3208 0 3194 32 30 2 13 0 8 0 nd6 144 32 0 16 1 0 1 1 0 8 0 pkpcb 40 24 0 24 5 5 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 2 0 2 2 2 0 1 0 8 0 ppxss 1192 232 0 232 4 3 1 1 0 8 1 pppxif 1504 13 0 13 3 3 0 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pffrag 232 41 0 27 1 0 1 1 0 482 0 pffrnode 88 37 0 24 1 0 1 1 0 8 0 pffrent 40 70 0 56 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfrktable 1344 2 0 2 2 2 0 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 174 0 59 1 0 1 1 0 8 0 pfstkey 128 178 0 64 4 0 4 4 0 8 0 pfstate 384 176 0 62 12 0 12 12 0 8 0 pfrule 1344 37 0 32 2 1 1 2 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 824 0 478 32 10 22 29 0 8 0 art_table 40 828 0 478 5 0 5 5 0 8 0 art_node 32 204 0 144 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 8 2 1 1 1 0 8 0 semapl 112 211 0 198 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 6608 0 5095 95 0 95 95 0 8 0 ffsino 296 6608 0 5095 117 0 117 117 0 8 0 nchpl 144 10371 0 8663 65 1 64 64 0 8 0 rtmask 32 15 0 15 4 4 0 1 0 8 0 uvmvnodes 80 8059 0 0 165 0 165 165 0 8 0 vnodes 216 8059 0 0 448 0 448 448 0 8 0 namei 1024 36301 0 36301 4 3 1 1 0 8 1 percpumem 16 311 0 261 1 0 1 1 0 8 0 kstatmem 264 208 0 178 5 2 3 3 0 8 0 scsiplug 72 14 0 14 7 6 1 1 0 8 1 scxspl 216 57485 0 57484 14 12 2 8 1 8 1 plimitpl 152 918 0 900 1 0 1 1 0 8 0 sigapl 424 2958 0 2902 9 1 8 9 0 8 0 knotepl 120 600 0 0 18 0 18 18 0 8 0 kqueuepl 224 1004 0 992 9 8 1 5 0 8 0 pipepl 344 397 0 370 9 6 3 6 0 8 0 fdescpl 528 2909 0 2877 3 0 3 3 0 8 0 filepl 160 20937 0 20710 34 20 14 18 0 8 1 lockfpl 104 1489 0 1485 3 1 2 2 0 8 1 lockfspl 48 627 0 623 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 138 0 121 1 0 1 1 0 8 0 ucredpl 104 3905 0 3891 1 0 1 1 0 8 0 zombiepl 144 3484 0 3483 1 0 1 1 0 8 0 processpl 1248 2958 0 2902 6 0 6 6 0 8 0 procpl 664 7296 0 7228 8 1 7 8 0 8 0 sosppl 168 11 0 11 5 5 0 1 0 8 0 sockpl 752 5540 0 5503 50 44 6 24 0 8 2 mcl64k 65536 9 0 0 2 0 2 2 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 134 0 0 17 0 17 17 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 54 0 0 7 0 7 7 0 8 0 mtagpl 96 110 0 0 3 0 3 3 0 8 0 mbufpl 256 1230 0 0 75 0 75 75 0 8 0 bufpl 280 22187 0 16044 440 0 440 440 0 8 0 anonpl 32 13398 0 0 110 1 109 109 0 246 0 amapchunkpl 152 91488 0 90904 70 37 33 36 0 158 4 amappl16 200 9196 0 9138 70 58 12 32 0 8 3 amappl15 192 23 0 23 1 1 0 1 0 8 0 amappl14 184 132 0 120 1 0 1 1 0 8 0 amappl13 176 5 0 5 2 2 0 1 0 8 0 amappl12 168 3607 0 3575 4 2 2 3 0 8 0 amappl11 160 67 0 53 1 0 1 1 0 8 0 amappl10 152 5 0 5 2 2 0 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 125 0 113 1 0 1 1 0 8 0 amappl6 120 222 0 218 1 0 1 1 0 8 0 amappl5 112 137 0 127 1 0 1 1 0 8 0 amappl4 104 329 0 308 1 0 1 1 0 8 0 amappl3 96 18336 0 18214 5 1 4 4 0 8 0 amappl2 88 744 0 677 2 0 2 2 0 8 0 amappl1 80 19629 0 19014 16 1 15 15 0 8 0 amappl 88 24813 0 24631 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 8 0 8 3 3 0 1 0 8 0 dma128 128 255 0 255 3 3 0 1 0 8 0 dma64 64 7 0 7 2 2 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 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 2909 0 2877 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2909 0 2877 1 0 1 1 0 8 0 vmmpekpl 168 24272 0 24220 3 0 3 3 0 8 0 vmmpepl 168 186986 0 184857 141 40 101 115 0 357 0 vmsppl 488 2908 0 2877 6 1 5 5 0 8 0 rwobjpl 80 55835 0 46648 194 3 191 191 0 8 0 pdppl 4096 5825 0 5754 115 44 71 85 0 8 0 pvpl 32 21835 0 0 177 0 177 177 0 265 0 pmappl 256 2908 0 2877 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 394 0 90 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83847ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_const_cmp4(ffffffff83772748,ffffffff83772710) at __sanitizer_cov_trace_const_cmp4+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(ffffffff83772748,ffffffff83772710) at __sanitizer_cov_trace_const_cmp4+0xf sys/dev/kcov.c:230 reaper(ffff8000ffffc538) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 10 ddb{0}> trace x86_ipi_db(ffffffff83847ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_const_cmp4(ffffffff83772748,ffffffff83772710) at __sanitizer_cov_trace_const_cmp4+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_const_cmp4(ffffffff83772748,ffffffff83772710) at __sanitizer_cov_trace_const_cmp4+0xf sys/dev/kcov.c:230 reaper(ffff8000ffffc538) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf10473ea60, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7bf10473ea60, count: -1