uvm_fault(0xfffffd806c69fd70, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff829f43a8 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80003c3d18e0 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff829f43a8 Starting stack trace... panic(ffffffff834eee54) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c3d1830) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff8000357a9780,fffffd800d11ce58,ffff80003c3d1a10) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2778 sys_futimes(ffff8000357a9780,ffff80003c3d1b60,ffff80003c3d1ab0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2820 syscall(ffff80003c3d1b60) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3d1b60) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7995ee32160, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 87 0 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *275126 70569 0 0 0 1 syz-executor 470577 54730 0 0x2 0x1 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x72aebf756470, 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}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806c69fd70, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x72aebf756470, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c3dd340 rbx 0 rdx 0 rcx 0xffff8000357a8558 rax 0x32 r8 0xffff80003c3dd270 r9 0x1 r10 0x5c617cb57ed3ae6 r11 0x78d26275d9a52dc8 r12 0 r13 0 r14 0xffff8000357a8558 r15 0 rip 0xffffffff8239b3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c3dd2c0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=275126 pid=70569 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000357a87f0,0xffff8000357a8d30 process=0xffff80002a37d358 user=0xffff80003c3d8000, vmspace=0xfffffd806c69f3e8 estcpu=36, cpticks=5, pctcpu=0.0, user=0, sys=5, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 73679 475687 2631 0 2 0x100002 ndp 2631 72731 5320 0 3 0x10008a sigsusp sh 30454 337061 54730 60929 2 0xc90 syz-executor 30454 117597 54730 60929 3 0x4000090 ttyin syz-executor 30454 222307 54730 60929 3 0x4000090 fsleep syz-executor 66460 8028 15619 0 2 0 syz-executor 66460 285198 15619 0 3 0x4000080 fsleep syz-executor 33390 488209 67736 0 2 0 syz-executor 33390 101383 67736 0 3 0x4000000 sbar syz-executor 33390 205211 67736 0 3 0x4000080 fsleep syz-executor *70569 275126 36846 0 7 0 syz-executor 70569 1435 36846 0 3 0x4000080 ttyopn syz-executor 55257 367427 34503 0 2 0 syz-executor 55257 257138 34503 0 3 0x4000080 fsleep syz-executor 55257 493697 34503 0 3 0x4000080 fsleep syz-executor 48833 402056 85122 0 2 0 syz-executor 48833 55645 85122 0 3 0x4000080 fsleep syz-executor 48833 482568 85122 0 3 0x4000080 fsleep syz-executor 5320 500189 60910 0 3 0x82 wait syz-executor 34503 399428 60910 0 2 0xc82 syz-executor 15619 482225 60910 0 2 0xc82 syz-executor 67736 486452 60910 0 2 0xc82 syz-executor 85122 57533 60910 0 2 0xc82 syz-executor 89324 441829 60910 0 2 0x2 syz-executor 54730 470577 60910 0 7 0x3 syz-executor 36846 411786 60910 0 2 0xc82 syz-executor 60910 166478 69841 0 3 0x82 kqread syz-executor 69841 387294 55337 0 3 0x10008a sigsusp ksh 55337 188802 96950 0 3 0x98 kqread sshd-session 96950 209879 45254 0 3 0x92 kqread sshd-session 28074 503609 1 0 2 0x100083 getty 45254 363824 1 0 3 0x88 kqread sshd 68780 32471 54639 74 3 0x1100092 bpf pflogd 54639 60615 1 0 3 0x80 sbwait pflogd 69109 150198 79748 73 3 0x1100090 kqread syslogd 79748 325442 1 0 3 0x100082 sbwait syslogd 25313 457717 1 0 3 0x100080 kqread resolvd 3242 505108 29510 77 3 0x100092 kqread dhcpleased 41053 264768 29510 77 3 0x100092 kqread dhcpleased 29510 368346 1 0 3 0x80 kqread dhcpleased 32981 86560 0 0 2 0x40014200 smr 5793 166044 0 0 3 0x14200 pgzero zerothread 29166 19152 0 0 3 0x14200 aiodoned aiodoned 74075 473484 0 0 3 0x14200 syncer update 63702 480211 0 0 3 0x14200 cleaner cleaner 79324 76042 0 0 3 0x14200 reaper reaper 72473 109517 0 0 3 0x14200 pgdaemon pagedaemon 30182 149082 0 0 3 0x14200 bored viomb 54755 277282 0 0 3 0x40014200 acpi0 acpi0 21377 499002 0 0 3 0x40014200 idle1 31863 235537 0 0 3 0x14200 bored softnet1 2687 260081 0 0 3 0x14200 netlock softnet0 34729 42111 0 0 2 0x40014200 systqmp 6291 519022 0 0 3 0x14200 bored systq 42855 164101 0 0 2 0x14200 softclockmp 40878 50183 0 0 3 0x40014200 tmoslp softclock 98760 519741 0 0 3 0x40014200 idle0 1 340056 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 33390 (syz-executor) thread 0xffff8000357a9780 (101383) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839eee80) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] #1 syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 #2 Xsyscall+0x128 Process 89324 (syz-executor) thread 0xffff80002a2222a8 (441829) exclusive rrwlock inode r = 0 (0xfffffd8076a0ad80) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1894 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8076cc4d68) #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+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1894 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11065 12158K 12290K 166960K 12312 0 pcb 17 12K 12K 166960K 31 0 rtable 242 8K 8K 166960K 385 0 pf 35 17K 21K 166960K 68 0 ifaddr 43 7K 7K 166960K 56 0 ifgroup 55 2K 2K 166960K 72 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 94 0 ioctlops 0 0K 4K 166960K 1505 0 iov 0 0K 0K 166960K 2 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1356 85K 85K 166960K 1494 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 72 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 220 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 196K 166960K 588 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 8 0 in_multi 99 7K 7K 166960K 111 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 402 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 240 153K 159K 166960K 3787 0 UVM aobj 6 2K 2K 166960K 6 0 pinsyscall 44 88K 105K 166960K 1402 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 14 0K 1K 166960K 36 0 temp 35 9114K 9180K 166960K 9192 0 kqueue 13 20K 26K 166960K 45 0 SYN cache 2 16K 16K 166960K 2 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 44 0 39 1 0 1 1 0 8 0 rtentry 176 121 0 12 6 0 6 6 0 8 0 unpcb 144 119 0 100 2 0 2 2 0 8 1 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 80 0 76 1 0 1 1 0 8 0 arp 136 20 0 2 1 0 1 1 0 8 0 inpcb 328 179 0 172 2 0 2 2 0 8 1 nd6 152 26 0 3 1 0 1 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 10 0 10 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pffrag 232 1 0 1 1 0 1 1 0 482 1 pffrnode 88 1 0 1 1 0 1 1 0 8 1 pffrent 40 3 0 3 1 0 1 1 0 8 1 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfsrclim 320 2 0 2 1 0 1 1 0 8 1 pfstitem 24 25 0 0 1 0 1 1 0 8 0 pfstkey 128 27 0 2 1 0 1 1 0 8 0 pfstate 448 26 0 1 3 0 3 3 0 8 0 pfrule 1360 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 498 0 44 29 0 29 29 0 8 0 art_table 40 499 0 44 5 0 5 5 0 8 0 art_node 32 121 0 22 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 0 1 0 1 1 0 8 0 semapl 72 70 0 60 1 0 1 1 0 8 0 shmpl 112 3 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1693 0 223 93 0 93 93 0 8 0 ffsino 296 1693 0 223 114 0 114 114 0 8 0 nchpl 144 1993 0 288 64 0 64 64 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 vnodes 216 1894 0 0 106 0 106 106 0 8 0 namei 1024 6447 0 6447 2 0 2 2 0 8 2 percpumem 16 62 0 12 1 0 1 1 0 8 0 kstatmem 264 39 0 12 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 7358 0 7358 9 1 8 8 1 8 8 plimitpl 152 80 0 62 1 0 1 1 0 8 0 sigapl 424 535 0 487 7 0 7 7 0 8 1 knotepl 120 522 0 0 16 0 16 16 0 8 0 kqueuepl 224 51 0 41 1 0 1 1 0 8 0 pipepl 344 133 0 106 3 0 3 3 0 8 0 fdescpl 528 519 0 487 3 0 3 3 0 8 0 filepl 160 2203 0 1981 13 0 13 13 0 8 2 lockfpl 104 311 0 307 2 0 2 2 0 8 1 lockfspl 48 93 0 89 1 0 1 1 0 8 0 sessionpl 144 25 0 16 1 0 1 1 0 8 0 pgrppl 48 34 0 17 1 0 1 1 0 8 0 ucredpl 104 196 0 181 1 0 1 1 0 8 0 zombiepl 144 487 0 487 1 0 1 1 0 8 1 processpl 1232 535 0 487 5 0 5 5 0 8 1 procpl 664 670 0 612 6 0 6 6 0 8 0 sockpl 752 343 0 312 7 0 7 7 0 8 3 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 193 0 0 12 0 12 12 0 8 0 bufpl 280 2565 0 105 176 0 176 176 0 8 0 anonpl 32 5412 0 0 44 0 44 44 0 246 0 amapchunkpl 152 10580 0 10097 25 0 25 25 0 158 5 amappl16 200 1440 0 1418 5 2 3 4 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 443 0 441 1 0 1 1 0 8 0 amappl13 176 128 0 115 1 0 1 1 0 8 0 amappl12 168 777 0 746 2 0 2 2 0 8 0 amappl11 160 18 0 18 1 1 0 1 0 8 0 amappl10 152 90 0 76 1 0 1 1 0 8 0 amappl9 144 270 0 270 1 1 0 1 0 8 0 amappl8 136 110 0 108 1 0 1 1 0 8 0 amappl7 128 155 0 141 1 0 1 1 0 8 0 amappl6 120 161 0 158 1 0 1 1 0 8 0 amappl5 112 106 0 95 1 0 1 1 0 8 0 amappl4 104 295 0 275 1 0 1 1 0 8 0 amappl3 96 1974 0 1859 4 0 4 4 0 8 0 amappl2 88 548 0 487 2 0 2 2 0 8 0 amappl1 80 10814 0 10173 16 1 15 15 0 8 1 amappl 88 3028 0 2866 4 0 4 4 0 92 0 uvmvnodes 80 103 0 0 3 0 3 3 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 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 72 5 0 0 1 0 1 1 0 8 0 uaddrrnd 24 519 0 487 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 519 0 487 1 0 1 1 0 8 0 vmmpekpl 168 6259 0 6220 2 0 2 2 0 8 0 vmmpepl 168 41912 0 39959 88 0 88 88 0 357 0 vmsppl 488 518 0 487 5 0 5 5 0 8 0 rwobjpl 80 15096 0 14015 23 0 23 23 0 8 0 pdppl 4096 1045 0 974 97 24 73 85 0 8 2 pvpl 32 11977 0 0 97 0 97 97 0 265 0 pmappl 256 518 0 487 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 273 0 27 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83962ff0) 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 __mp_lock(ffffffff839ee680) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839ee680) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a222540,5b,0,ffff80002a2c6ac0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a222540,5b,0,ffff80002a2c6ac0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a2c6b70) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a2c6b70) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x788d79814dc0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff83962ff0) 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 __mp_lock(ffffffff839ee680) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839ee680) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a222540,5b,0,ffff80002a2c6ac0) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a222540,5b,0,ffff80002a2c6ac0) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a2c6b70) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a2c6b70) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x788d79814dc0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x72aebf756470, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x72aebf756470, count: -1