uvm_fault(0xfffffd806c6c1200, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82ee10e8 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80002a24df60 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82ee10e8 Starting stack trace... panic(ffffffff834ef1bf) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a24deb0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80002a223a00,fffffd8060a521d8,ffff80002a24e070) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2778 sys_futimens(ffff80002a223a00,ffff80002a24e1c0,ffff80002a24e110) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2854 syscall(ffff80002a24e1c0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a24e1c0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc369af20450, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 -389779168 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *446573 85019 0 0 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x744d4f9a91f0, 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(0xfffffd806c6c1200, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x744d4f9a91f0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c3e52f0 rbx 0 rdx 0 rcx 0xffff80002a222a70 rax 0x3b r8 0xffff80003c3e5220 r9 0x1 r10 0xbf8cbff8bdaa0ad7 r11 0x142bd63123ddcc0 r12 0 r13 0 r14 0xffff80002a222a70 r15 0 rip 0xffffffff813d53ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003c3e5270 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=446573 pid=85019 tcnt=3 stat=onproc flags process=0 proc=0 runpri=80, usrpri=80, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003afbc2b8,0xffff80002a223a10 process=0xffff800037f90020 user=0xffff80003c3e0000, vmspace=0xfffffd806c6c1200 estcpu=30, cpticks=111, pctcpu=0.85, user=3, sys=108, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *85019 446573 96107 0 7 0 syz-executor 85019 199709 96107 0 3 0x4000000 sbar syz-executor 85019 111209 96107 0 3 0x4000080 fsleep syz-executor 63286 412239 55587 0 3 0x80 nanoslp syz-executor 63286 46919 55587 0 3 0x4000080 fsleep syz-executor 38855 435586 90694 0 3 0x3000 suspend syz-executor 38855 522282 90694 0 2 0x4081000 syz-executor 38855 250785 90694 0 3 0x4081000 inode syz-executor 31629 35776 1 0 3 0x80 nanoslp init 29025 32518 0 0 3 0x14200 acct acct 55587 77723 45641 0 3 0x82 nanoslp syz-executor 28672 86214 45641 0 2 0x2 syz-executor 90694 477548 45641 0 3 0x82 nanoslp syz-executor 4926 342487 45641 0 2 0x10000c82 syz-executor 38706 57290 45641 0 2 0x10000082 syz-executor 20415 381968 45641 0 2 0x10000082 syz-executor 96107 514459 45641 0 2 0xc82 syz-executor 79551 340657 45641 0 3 0x82 nanoslp syz-executor 45641 361052 1 0 3 0x82 kqread syz-executor 21461 424809 0 0 3 0x14200 bored smr 94302 401350 0 0 2 0x14200 zerothread 375 18439 0 0 3 0x14200 aiodoned aiodoned 38386 363290 0 0 3 0x14200 syncer update 52132 93446 0 0 3 0x14200 cleaner cleaner 92770 449843 0 0 3 0x14200 reaper reaper 48716 340533 0 0 3 0x14200 pgdaemon pagedaemon 4345 239537 0 0 3 0x14200 bored viomb 95553 338296 0 0 3 0x40014200 acpi0 acpi0 15329 205313 0 0 3 0x40014200 idle1 9286 199039 0 0 3 0x14200 bored softnet1 14097 125235 0 0 3 0x14200 bored softnet0 21193 7509 0 0 2 0x40014200 systqmp 4365 393498 0 0 3 0x14200 bored systq 48345 115110 0 0 3 0x14200 tmoslp softclockmp 84472 381444 0 0 3 0x40014200 tmoslp softclock 25702 363716 0 0 3 0x40014200 idle0 1 408354 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c4e5b10) #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+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1827 #3 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 #4 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #4 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 #5 exit1+0x6fc sys/kern/kern_exit.c:260 #6 sys_exit+0x1a sys/kern/kern_exit.c:-1 #7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #8 Xsyscall+0x128 Process 85019 (syz-executor) thread 0xffff80002a223a00 (199709) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a3f4c0) #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 38855 (syz-executor) thread 0xffff80002a223768 (522282) exclusive rrwlock inode r = 0 (0xfffffd806b7e4440) #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 vn_write+0x18f sys/kern/vfs_vnops.c:411 #6 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #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:783 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11061 12089K 12408K 166960K 12376 0 pcb 17 14K 16K 166960K 140 0 rtable 153 7K 8K 166960K 397 0 pf 32 17K 21K 166960K 79 0 ifaddr 31 4K 7K 166960K 56 0 ifgroup 51 2K 2K 166960K 83 0 sysctl 4 1K 9K 166960K 8 0 counters 68 36K 37K 166960K 90 0 ioctlops 0 0K 4K 166960K 1567 0 iov 0 0K 16K 166960K 17 0 mount 1 1K 1K 166960K 1 0 log 1 0K 0K 166960K 5 0 vnodes 1379 87K 87K 166960K 1604 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 10 0K 0K 166960K 14 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 12 45K 85K 166960K 336 0 sigio 0 0K 0K 166960K 5 0 proc 12 17K 147K 166960K 587 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 25 0 in_multi 64 4K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 404 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 100 77K 167K 166960K 4934 0 UVM aobj 16 4K 4K 166960K 16 0 pinsyscall 14 28K 101K 166960K 1500 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 24 0 NDP 11 0K 2K 166960K 35 0 temp 41 9115K 9152K 166960K 12549 0 kqueue 2 4K 22K 166960K 72 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 44 1 0 1 1 0 8 1 rtentry 176 117 0 57 6 0 6 6 0 8 0 unpcb 144 231 0 229 3 0 3 3 0 8 2 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 53 0 51 1 0 1 1 0 8 0 arp 136 19 0 9 1 0 1 1 0 8 0 inpcb 328 303 0 300 6 0 6 6 0 8 5 nd6 152 26 0 10 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 6 0 6 1 0 1 1 0 8 1 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 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 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 39 0 1 1 0 1 1 0 8 0 pfstkey 128 39 0 1 2 0 2 2 0 8 0 pfstate 448 39 0 1 5 0 5 5 0 8 0 pfrule 1360 31 0 26 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 510 0 199 29 0 29 29 0 8 5 art_table 40 511 0 199 5 0 5 5 0 8 0 art_node 32 117 0 64 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 72 12 0 4 1 0 1 1 0 8 0 shmpl 112 13 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1923 0 452 93 0 93 93 0 8 0 ffsino 296 1923 0 452 115 0 115 115 0 8 0 nchpl 144 2395 0 688 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2206 0 0 123 0 123 123 0 8 0 namei 1024 8151 0 8151 3 1 2 3 0 8 2 percpumem 16 60 0 11 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 43 0 16 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 11855 0 11855 9 3 6 8 1 8 6 plimitpl 152 57 0 47 1 0 1 1 0 8 0 sigapl 424 657 0 621 7 1 6 7 0 8 0 knotepl 120 280 0 0 9 0 9 9 0 8 0 kqueuepl 224 116 0 113 1 0 1 1 0 8 0 pipepl 344 138 0 111 3 0 3 3 0 8 0 fdescpl 528 640 0 625 3 0 3 3 0 8 0 filepl 160 3142 0 2980 13 0 13 13 0 8 4 lockfpl 104 156 0 155 1 0 1 1 0 8 0 lockfspl 48 73 0 72 1 0 1 1 0 8 0 sessionpl 144 33 0 31 1 0 1 1 0 8 0 pgrppl 48 43 0 33 1 0 1 1 0 8 0 ucredpl 104 322 0 319 1 0 1 1 0 8 0 zombiepl 144 626 0 621 1 0 1 1 0 8 0 processpl 1232 657 0 621 5 0 5 5 0 8 0 procpl 664 1000 0 959 6 0 6 6 0 8 1 sockpl 752 588 0 583 8 0 8 8 0 8 6 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 115 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 20 0 0 3 0 3 3 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 150 0 0 10 0 10 10 0 8 0 bufpl 280 5626 0 105 395 0 395 395 0 8 0 anonpl 32 7599 0 0 62 0 62 62 0 246 0 amapchunkpl 152 15199 0 14941 24 0 24 24 0 158 5 amappl16 200 1989 0 1878 16 4 12 15 0 8 5 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 437 0 437 1 0 1 1 0 8 1 amappl13 176 131 0 131 1 0 1 1 0 8 1 amappl12 168 890 0 877 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 107 0 107 1 0 1 1 0 8 1 amappl9 144 356 0 356 1 1 0 1 0 8 0 amappl8 136 100 0 99 1 0 1 1 0 8 0 amappl7 128 153 0 150 1 0 1 1 0 8 0 amappl6 120 159 0 159 1 1 0 1 0 8 0 amappl5 112 97 0 96 1 0 1 1 0 8 0 amappl4 104 294 0 292 1 0 1 1 0 8 0 amappl3 96 2831 0 2777 4 0 4 4 0 8 0 amappl2 88 549 0 542 2 0 2 2 0 8 0 amappl1 80 11299 0 11220 14 0 14 14 0 8 8 amappl 88 4118 0 4028 5 0 5 5 0 92 1 uvmvnodes 80 104 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 128 253 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 72 15 0 0 1 0 1 1 0 8 0 uaddrrnd 24 640 0 625 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 640 0 625 1 0 1 1 0 8 0 vmmpekpl 168 7154 0 7114 2 0 2 2 0 8 0 vmmpepl 168 49401 0 48713 96 2 94 96 0 357 50 vmsppl 488 639 0 624 5 1 4 5 0 8 0 rwobjpl 80 16848 0 16393 27 2 25 27 0 8 2 pdppl 4096 1287 0 1248 95 48 47 83 0 8 8 pvpl 32 16011 0 0 130 0 130 130 0 265 0 pmappl 256 639 0 624 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 270 0 53 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff839d3ff0) 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(ffffffff83a3ecc0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a3ecc0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 exit1(ffff80002a222540,0,0,1) at exit1+0x701 sys/kern/kern_exit.c:260 sys_exit(ffff80002a222540,ffff8000383a1bf0,ffff8000383a1b40) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000383a1bf0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000383a1bf0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d3ff47f3b20, count: 7 ddb{0}>