login: uvm_fault(0xfffffd806d91d5e0, 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 ffff800037bb5880 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(ffff800037bb57d0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff8000383bc7e8,fffffd805f927da0,ffff800037bb59b0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2778 sys_futimes(ffff8000383bc7e8,ffff800037bb5b00,ffff800037bb5a50) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2820 syscall(ffff800037bb5b00) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800037bb5b00) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xce214e81280, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 -1142794704 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 155574 67728 0 0 0 0 syz-executor *307673 61172 0 0 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x742bda306f00, 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(0xfffffd806d91d5e0, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x742bda306f00, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000383c3910 rbx 0 rdx 0 rcx 0xffff8000383bdca8 rax 0x3c r8 0xffff8000383c3840 r9 0x1 r10 0x7dd7321e4a875042 r11 0xc3de5f906a71ab10 r12 0 r13 0 r14 0xffff8000383bdca8 r15 0 rip 0xffffffff8239b3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff8000383c3890 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=307673 pid=61172 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000383b74e8,0xffff8000383bc7f8 process=0xffff80002a383038 user=0xffff8000383be000, vmspace=0xfffffd806d91d5e0 estcpu=36, cpticks=3, pctcpu=0.0, user=1, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 67728 155574 58892 0 7 0 syz-executor 63589 130269 82168 0 2 0 syz-executor 63589 264559 82168 0 3 0x4000080 fsleep syz-executor *61172 307673 36763 0 7 0 syz-executor 61172 506282 36763 0 3 0x4000000 sbar syz-executor 13492 196880 44968 0 3 0x80 nanoslp syz-executor 13492 240793 44968 0 3 0x4000080 msgwait syz-executor 13492 322469 44968 0 3 0x4000080 msgwait syz-executor 13492 372642 44968 0 3 0x4000080 fsleep syz-executor 942 228188 45768 0 3 0x80 nanoslp syz-executor 942 210138 45768 0 3 0x4000080 sbwait syz-executor 942 284620 45768 0 3 0x4000080 kqread syz-executor 942 386256 45768 0 3 0x4000080 fsleep syz-executor 35440 306645 1 0 3 0x100083 ttyin getty 58892 250314 17661 0 3 0x82 nanoslp syz-executor 82168 13560 17661 0 3 0x82 nanoslp syz-executor 44968 17341 17661 0 3 0x82 nanoslp syz-executor 79823 409284 17661 0 3 0x82 nanoslp syz-executor 45768 396051 17661 0 3 0x82 nanoslp syz-executor 71189 364820 17661 0 3 0x82 nanoslp syz-executor 36763 368502 17661 0 3 0x82 nanoslp syz-executor 23811 309382 17661 0 3 0x82 wait syz-executor 17661 31543 20121 0 3 0x82 kqread syz-executor 20121 408414 43316 0 3 0x10008a sigsusp ksh 43316 381350 3455 0 3 0x98 kqread sshd-session 3455 519689 12827 0 3 0x92 kqread sshd-session 12827 287927 1 0 3 0x88 kqread sshd 8472 82361 97076 74 3 0x1100092 bpf pflogd 97076 366271 1 0 3 0x80 sbwait pflogd 50272 129491 78181 73 3 0x1100090 kqread syslogd 78181 292570 1 0 3 0x100082 sbwait syslogd 91795 184257 1 0 3 0x100080 kqread resolvd 58249 114246 1185 77 3 0x100092 kqread dhcpleased 36951 129838 1185 77 3 0x100092 kqread dhcpleased 1185 386749 1 0 3 0x80 kqread dhcpleased 9738 254094 0 0 3 0x14200 bored smr 41931 247394 0 0 3 0x14200 pgzero zerothread 57277 503353 0 0 3 0x14200 aiodoned aiodoned 59671 187575 0 0 3 0x14200 syncer update 89713 234408 0 0 3 0x14200 cleaner cleaner 47916 304123 0 0 3 0x14200 reaper reaper 93830 184065 0 0 3 0x14200 pgdaemon pagedaemon 30942 75935 0 0 3 0x14200 bored viomb 14047 342487 0 0 3 0x40014200 acpi0 acpi0 4837 208387 0 0 3 0x40014200 idle1 7416 205498 0 0 3 0x14200 bored softnet1 16674 44863 0 0 3 0x14200 netlock softnet0 99202 521130 0 0 2 0x40014200 systqmp 5102 14135 0 0 3 0x14200 bored systq 62834 276652 0 0 3 0x14200 tmoslp softclockmp 39091 43721 0 0 3 0x40014200 tmoslp softclock 45532 505285 0 0 3 0x40014200 idle0 1 418588 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 67728 (syz-executor) thread 0xffff8000383bda10 (155574) shared rwlock vmmaplk r = 0 (0xfffffd806d91dab0) #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 61172 (syz-executor) thread 0xffff8000383bc7e8 (506282) 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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11069 12147K 12343K 166960K 12458 0 pcb 18 12K 12K 166960K 62 0 rtable 205 6K 6K 166960K 383 0 pf 32 17K 19K 166960K 55 0 ifaddr 36 6K 7K 166960K 50 0 ifgroup 49 2K 2K 166960K 64 0 sysctl 2 1K 9K 166960K 6 0 counters 70 36K 37K 166960K 80 0 ioctlops 0 0K 4K 166960K 1526 0 iov 0 0K 16K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1360 86K 86K 166960K 1606 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 53 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 333 0 sigio 0 0K 0K 166960K 4 0 proc 72 115K 164K 166960K 582 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 28 0 in_multi 77 5K 7K 166960K 113 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 532 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 256 160K 176K 166960K 4784 0 UVM aobj 41 2K 2K 166960K 43 0 pinsyscall 43 86K 104K 166960K 1503 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 14 0 NDP 11 0K 2K 166960K 31 0 temp 46 9116K 9178K 166960K 16235 0 kqueue 17 26K 30K 166960K 66 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 48 0 45 1 0 1 1 0 8 0 rtentry 176 116 0 26 5 0 5 5 0 8 0 unpcb 144 130 0 112 2 0 2 2 0 8 1 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpcb 736 56 0 52 1 0 1 1 0 8 0 arp 136 18 0 4 1 0 1 1 0 8 0 inpcb 328 349 0 340 9 5 4 7 0 8 2 nd6 152 26 0 7 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 4 0 2 1 0 1 1 0 8 0 pppxif 1576 1 0 1 1 0 1 1 0 8 1 pffrag 232 2 0 1 1 0 1 1 0 482 0 pffrnode 88 2 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 pfsrclim 320 2 0 1 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 0 1 1 0 8 1 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 23 0 17 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 497 0 99 30 4 26 29 0 8 1 art_table 40 498 0 99 5 0 5 5 0 8 0 art_node 32 116 0 34 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semapl 72 17 0 7 1 0 1 1 0 8 0 shmpl 112 40 0 2 2 0 2 2 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1909 0 439 93 1 92 93 0 8 0 ffsino 296 1909 0 439 114 0 114 114 0 8 0 nchpl 144 2411 0 706 64 0 64 64 0 8 0 vnodes 216 2196 0 0 122 0 122 122 0 8 0 namei 1024 7745 0 7745 2 1 1 1 0 8 1 percpumem 16 55 0 5 1 0 1 1 0 8 0 kstatmem 264 33 0 8 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 8869 0 8869 12 10 2 8 1 8 2 plimitpl 152 78 0 59 1 0 1 1 0 8 0 sigapl 424 653 0 605 7 1 6 7 0 8 0 knotepl 120 518 0 0 16 0 16 16 0 8 0 kqueuepl 224 82 0 69 1 0 1 1 0 8 0 pipepl 344 211 0 184 9 6 3 9 0 8 0 fdescpl 528 637 0 605 3 0 3 3 0 8 0 filepl 160 3097 0 2872 21 8 13 18 0 8 2 lockfpl 104 96 0 93 1 0 1 1 0 8 0 lockfspl 48 44 0 41 1 0 1 1 0 8 0 sessionpl 144 35 0 26 1 0 1 1 0 8 0 pgrppl 48 44 0 27 1 0 1 1 0 8 0 ucredpl 104 350 0 337 1 0 1 1 0 8 0 zombiepl 144 608 0 605 1 0 1 1 0 8 0 processpl 1232 653 0 605 5 1 4 5 0 8 0 procpl 664 996 0 940 6 0 6 6 0 8 0 sockpl 752 574 0 543 14 6 8 10 0 8 4 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 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 126 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 193 0 0 13 0 13 13 0 8 0 bufpl 280 3024 0 106 209 0 209 209 0 8 0 anonpl 32 3822 0 0 31 0 31 31 0 246 0 amapchunkpl 152 14450 0 13900 30 1 29 30 0 158 6 amappl16 200 2095 0 2064 5 2 3 5 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 430 0 429 1 0 1 1 0 8 0 amappl13 176 127 0 115 1 0 1 1 0 8 0 amappl12 168 888 0 857 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 68 0 54 1 0 1 1 0 8 0 amappl9 144 276 0 276 1 1 0 1 0 8 0 amappl8 136 101 0 99 1 0 1 1 0 8 0 amappl7 128 149 0 136 1 0 1 1 0 8 0 amappl6 120 159 0 158 1 0 1 1 0 8 0 amappl5 112 105 0 93 1 0 1 1 0 8 0 amappl4 104 295 0 276 1 0 1 1 0 8 0 amappl3 96 2797 0 2670 4 0 4 4 0 8 0 amappl2 88 559 0 498 2 0 2 2 0 8 0 amappl1 80 11767 0 11154 18 2 16 17 0 8 1 amappl 88 4019 0 3837 5 0 5 5 0 92 0 uvmvnodes 80 110 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 7 0 7 2 1 1 1 0 8 1 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 42 0 2 1 0 1 1 0 8 0 uaddrrnd 24 638 0 606 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 638 0 606 1 0 1 1 0 8 0 vmmpekpl 168 7585 0 7546 3 0 3 3 0 8 0 vmmpepl 168 49756 0 47762 100 1 99 99 0 357 8 vmsppl 488 637 0 606 6 1 5 5 0 8 0 rwobjpl 80 17367 0 16257 28 1 27 27 0 8 4 pdppl 4096 1283 0 1212 101 26 75 85 0 8 4 pvpl 32 12968 0 0 105 0 105 105 0 265 0 pmappl 256 637 0 606 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 282 0 36 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:159 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+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 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+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 syscall(ffff80003c3e96b0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c3e96b0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c2d86cc6020, count: 1 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x44 sys/dev/kcov.c:159 softintr_dispatch(2) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(2) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsofttty() at Xsofttty+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 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+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 syscall(ffff80003c3e96b0) at syscall+0xaf4 mi_syscall sys/sys/syscall_mi.h:175 [inline] syscall(ffff80003c3e96b0) at syscall+0xaf4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c2d86cc6020, count: -14 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x742bda306f00, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x742bda306f00, count: -1