uvm_fault(0xfffffd806f3b8b78, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81f264d8 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff8000383b7870 gsbase 0xffff8000299bdff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81f264d8 Starting stack trace... panic(ffffffff8348280a) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000383b77c0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003a7d87e8,fffffd806c44ecc8,ffff8000383b79a0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2771 sys_futimes(ffff80003a7d87e8,ffff8000383b7af0,ffff8000383b7a40) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2813 syscall(ffff8000383b7af0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000383b7af0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa8e33dd3620, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 -468970416 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 22516 63313 0 0 0x4000000 1 syz-executor 356809 18832 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x9bffef1fa20, 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(0xfffffd806f3b8b78, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x9bffef1fa20, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c403510 rbx 0 rdx 0xffff8000015f22c0 rcx 0xffff80003a7d9778 rax 0x3b r8 0xffff80003c403440 r9 0x1 r10 0xed47302a55c60b61 r11 0xe53e1b138ff8bed6 r12 0 r13 0 r14 0xffff80003a7d9778 r15 0 rip 0xffffffff830223ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c403490 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=22516 pid=63313 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a7d8550,0xffff80003a7d8fc0 process=0xffff80003c3f5d00 user=0xffff80003c3fe000, vmspace=0xfffffd806c7177b8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74651 507156 12690 0 2 0 syz-executor 43669 177332 18832 0 2 0xc80 syz-executor 43669 517272 18832 0 3 0x4000080 fsleep syz-executor 43669 166495 18832 0 3 0x4000080 fsleep syz-executor 63313 415250 38028 0 2 0 syz-executor *63313 22516 38028 0 7 0x4000000 syz-executor 45565 117393 25519 0 2 0 syz-executor 45565 89216 25519 0 3 0x4000080 nanoslp syz-executor 45565 207152 25519 0 2 0x4000000 syz-executor 88625 193830 86576 0 2 0 syz-executor 88625 117664 86576 0 3 0x4000000 sbar syz-executor 59943 500509 11304 60929 2 0x82010 syz-executor 59943 315787 11304 60929 4 0x4082010 syz-executor 59943 15668 11304 60929 3 0x4002010 suspend syz-executor 44770 332917 71430 0 2 0xc80 syz-executor 44770 370417 71430 0 2 0x4000080 syz-executor 44770 471287 71430 0 3 0x4000080 fsleep syz-executor 65683 504169 39262 -1 2 0xc90 syz-executor 65683 222389 39262 -1 3 0x4000090 semwait syz-executor 65683 60702 39262 -1 3 0x4000090 fsleep syz-executor 71430 192557 1785 0 2 0xc82 syz-executor 12690 80333 1785 0 2 0xc82 syz-executor 38028 115837 1785 0 2 0xc82 syz-executor 25519 514681 1785 0 2 0xc82 syz-executor 18832 356809 1785 0 7 0x2 syz-executor 11304 500776 1785 0 2 0xc82 syz-executor 39262 313605 1785 0 2 0xc82 syz-executor 86576 305886 1785 0 2 0xc82 syz-executor 1785 74848 26638 0 3 0x82 kqread syz-executor 26638 261297 37135 0 3 0x10008a sigsusp ksh 37135 81224 81727 0 3 0x98 kqread sshd-session 81727 161812 17600 0 3 0x92 kqread sshd-session 54743 511583 1 0 2 0x100083 getty 17600 241453 1 0 3 0x88 kqread sshd 62565 125741 11545 74 3 0x1100092 bpf pflogd 11545 130203 1 0 3 0x80 sbwait pflogd 12546 503934 95035 73 3 0x1100090 kqread syslogd 95035 406943 1 0 3 0x100082 sbwait syslogd 12931 14389 1 0 3 0x100080 kqread resolvd 70141 474190 66433 77 3 0x100092 kqread dhcpleased 38221 108524 66433 77 3 0x100092 kqread dhcpleased 66433 33197 1 0 3 0x80 kqread dhcpleased 11595 16027 0 0 3 0x14200 bored smr 51147 38118 0 0 2 0x14200 zerothread 78171 300312 0 0 3 0x14200 aiodoned aiodoned 98663 345749 0 0 3 0x14200 syncer update 81522 121642 0 0 3 0x14200 cleaner cleaner 87153 89047 0 0 3 0x14200 reaper reaper 50431 281076 0 0 3 0x14200 pgdaemon pagedaemon 87632 461804 0 0 3 0x14200 bored viomb 49789 302389 0 0 3 0x40014200 acpi0 acpi0 50098 114061 0 0 3 0x40014200 idle1 12248 205243 0 0 3 0x14200 bored softnet1 59888 331687 0 0 3 0x14200 netlock softnet0 87457 347225 0 0 2 0x40014200 systqmp 83109 340632 0 0 3 0x14200 bored systq 39530 282013 0 0 3 0x14200 tmoslp softclockmp 56124 200287 0 0 3 0x40014200 tmoslp softclock 18984 502628 0 0 3 0x40014200 idle0 1 394382 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 63313 (syz-executor) thread 0xffff80003a7d94e0 (415250) shared rwlock vmmaplk r = 0 (0xfffffd806c7178b8) #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_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #6 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #7 recall_trap+0x8 Process 88625 (syz-executor) thread 0xffff80003a7d87e8 (117664) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a1a740) #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 44770 (syz-executor) thread 0xffff80003c3f3780 (370417) exclusive rrwlock inode r = 0 (0xfffffd806c4d6b30) #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 spec_open+0x2f2 sys/kern/spec_vnops.c:151 #6 VOP_OPEN+0x8b sys/kern/vfs_vops.c:138 #7 vn_open+0x7a5 sys/kern/vfs_vnops.c:183 #8 vndioctl+0xc43 sys/dev/vnd.c:458 #9 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #10 vn_ioctl+0xf8 sys/kern/vfs_vnops.c:537 #11 sys_ioctl+0x674 sys/kern/sys_generic.c:-1 #12 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11088 12151K 12308K 166960K 12360 0 pcb 18 12K 28K 166960K 112 0 rtable 217 6K 7K 166960K 365 0 pf 32 17K 21K 166960K 58 0 ifaddr 39 6K 7K 166960K 48 0 ifgroup 51 2K 2K 166960K 59 0 sysctl 1 1K 9K 166960K 5 0 counters 68 36K 37K 166960K 76 0 ioctlops 0 0K 4K 166960K 1508 0 iov 0 0K 12K 166960K 36 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1317 83K 83K 166960K 1488 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 10 1K 1K 166960K 76 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 249 0 proc 72 115K 164K 166960K 563 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 12 0 in_multi 91 6K 7K 166960K 105 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 223 996K 996K 166960K 223 0 exec 0 0K 1K 166960K 390 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 151K 172K 166960K 4208 0 UVM aobj 12 4K 4K 166960K 12 0 pinsyscall 43 86K 107K 166960K 1396 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 11 0K 2K 166960K 31 0 temp 39 9075K 9142K 166960K 8332 0 kqueue 13 20K 28K 166960K 42 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 39 0 36 1 0 1 1 0 8 0 rtentry 176 115 0 16 6 0 6 6 0 8 0 unpcb 144 101 0 76 2 0 2 2 0 8 1 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 91 0 87 7 0 7 7 0 8 6 arp 136 18 0 4 1 0 1 1 0 8 0 inpcb 328 275 0 267 7 0 7 7 0 8 6 nd6 152 27 0 3 2 0 2 2 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 3 0 3 1 0 1 1 0 8 1 pffrag 232 3 0 1 1 0 1 1 0 482 0 pffrnode 88 3 0 1 1 0 1 1 0 8 0 pffrent 40 4 0 2 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 37 0 0 1 0 1 1 0 8 0 pfstkey 128 37 0 0 2 0 2 2 0 8 0 pfstate 448 37 0 0 5 0 5 5 0 8 0 pfrule 1360 24 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 466 0 48 29 0 29 29 0 8 1 art_table 40 467 0 48 5 0 5 5 0 8 0 art_node 32 115 0 26 1 0 1 1 0 8 0 semapl 112 73 0 66 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1783 0 323 93 0 93 93 0 8 0 ffsino 296 1783 0 323 114 0 114 114 0 8 0 nchpl 144 2125 0 425 64 0 64 64 0 8 0 vnodes 216 1956 0 0 109 0 109 109 0 8 0 namei 1024 6959 0 6959 1 0 1 1 0 8 1 percpumem 16 53 0 4 1 0 1 1 0 8 0 kstatmem 264 31 0 6 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 6923 0 6923 4 3 1 3 1 8 1 plimitpl 152 108 0 90 1 0 1 1 0 8 0 sigapl 424 565 0 517 7 0 7 7 0 8 1 knotepl 120 309 0 0 10 0 10 10 0 8 0 kqueuepl 224 54 0 45 1 0 1 1 0 8 0 pipepl 344 130 0 103 3 0 3 3 0 8 0 fdescpl 528 547 0 515 3 0 3 3 0 8 0 filepl 160 2564 0 2339 14 0 14 14 0 8 4 lockfpl 104 42 0 40 1 0 1 1 0 8 0 lockfspl 48 20 0 18 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 36 0 19 1 0 1 1 0 8 0 ucredpl 104 277 0 261 1 0 1 1 0 8 0 zombiepl 144 517 0 517 1 0 1 1 0 8 1 processpl 1232 565 0 517 5 0 5 5 0 8 0 procpl 664 748 0 688 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 752 485 0 449 11 0 11 11 0 8 7 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 109 0 0 14 0 14 14 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 160 0 0 10 0 10 10 0 8 0 bufpl 280 2494 0 106 171 0 171 171 0 8 0 anonpl 32 5518 0 0 46 1 45 45 0 246 0 amapchunkpl 152 25130 0 24624 40 0 40 40 0 158 18 amappl16 200 1928 0 1903 5 2 3 5 0 8 1 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 429 0 427 1 0 1 1 0 8 0 amappl13 176 127 0 115 1 0 1 1 0 8 0 amappl12 168 799 0 768 2 0 2 2 0 8 0 amappl11 160 8 0 6 1 0 1 1 0 8 0 amappl10 152 65 0 51 1 0 1 1 0 8 0 amappl9 144 272 0 272 1 1 0 1 0 8 0 amappl8 136 110 0 108 1 0 1 1 0 8 0 amappl7 128 152 0 139 1 0 1 1 0 8 0 amappl6 120 156 0 155 1 0 1 1 0 8 0 amappl5 112 94 0 84 1 0 1 1 0 8 0 amappl4 104 388 0 369 1 0 1 1 0 8 0 amappl3 96 2206 0 2087 4 0 4 4 0 8 0 amappl2 88 533 0 470 2 0 2 2 0 8 0 amappl1 80 10220 0 9618 16 0 16 16 0 8 1 amappl 88 3463 0 3293 5 0 5 5 0 92 1 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 128 256 0 256 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 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 547 0 515 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 547 0 515 1 0 1 1 0 8 0 vmmpekpl 168 6317 0 6287 2 0 2 2 0 8 0 vmmpepl 168 43237 0 41298 96 0 96 96 0 357 11 vmsppl 488 546 0 515 5 0 5 5 0 8 1 rwobjpl 80 15388 0 14345 25 0 25 25 0 8 1 pdppl 4096 1101 0 1030 97 26 71 85 0 8 0 pvpl 32 12906 0 0 106 1 105 105 0 265 0 pmappl 256 546 0 515 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 276 0 29 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83911ff0) 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_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83a19f40) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a19f40) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 syscall(ffff80002a322e20) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a322e20) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76fb49774300, count: 8 ddb{0}> trace x86_ipi_db(ffffffff83911ff0) 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_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83a19f40) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a19f40) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 syscall(ffff80002a322e20) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80002a322e20) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76fb49774300, 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: 0x9bffef1fa20, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x9bffef1fa20, count: -1