66kernel:E pag 0 aau Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 394357 65244 0 0 0x4000000 1K syz-executor *208783 74902 0 0 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x75bfad0c41b0, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu1: uvm_fault(0xfffff2006cf10018, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x75bfad0c41b0, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800034f87fd0 rbx 0 rdx 0 rcx 0xffff8000383902c0 rax 0x3b r8 0xffff800034f87f00 r9 0 r10 0x20c8f910cdcf063e r11 0x7de42f9b49a9b327 r12 0 r13 0 r14 0xffff8000383902c0 r15 0 rip 0xffffffff817bc3ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff800034f87f50 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=208783 pid=74902 tcnt=3 stat=onproc flags process=0 proc=0 runpri=63, usrpri=63, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045feea78,0xffff800038391260 process=0xffff800045feb9d8 user=0xffff800034f83000, vmspace=0xfffff2006cf103e8 estcpu=13, cpticks=7, pctcpu=0.4, user=4, sys=3, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 77014 463320 9183 0 2 0x10 0 syz-executor 77014 298161 9183 0 3 0x10 0x4000080 fsleep syz-executor 64878 73167 30537 0 2 0 0 syz-executor 64878 169911 30537 0 3 0 0x4000080 fsleep syz-executor 79017 112958 55655 0 2 0 0 syz-executor 79017 318613 55655 0 3 0 0x4000080 fsleep syz-executor 48311 361728 1 0 3 0x2 0x80 nanoslp getty 94673 20574 66761 0 3 0 0x80 nanoslp syz-executor 94673 169798 66761 0 3 0 0x4000080 fsleep syz-executor 94673 333591 66761 0 2 0 0x4000000 syz-executor 94673 264986 66761 0 3 0 0x4000080 fsleep syz-executor 65244 73127 33093 0 2 0 0 syz-executor 65244 394357 33093 0 7 0 0x4000000 syz-executor 54498 204442 312 0 2 0x4000000 0 syz-executor 54498 32512 312 0 3 0x4000000 0x4000000 biowait syz-executor 54498 463459 312 0 3 0x4000000 0x4000080 fsleep syz-executor *74902 208783 9050 0 7 0 0 syz-executor 74902 152813 9050 0 3 0 0x4000080 fsleep syz-executor 74902 326615 9050 0 3 0 0x4000080 fsleep syz-executor 30537 16841 40457 0 3 0x2 0x80 nanoslp syz-executor 9050 330261 40457 0 3 0x2 0x80 nanoslp syz-executor 9183 329591 40457 0 3 0x2 0x80 nanoslp syz-executor 312 346089 40457 0 3 0x2 0x80 nanoslp syz-executor 33093 198491 40457 0 3 0x2 0x80 nanoslp syz-executor 55779 461263 40457 0 3 0x2 0 biowait syz-executor 55655 80752 40457 0 3 0x2 0x80 nanoslp syz-executor 66761 247732 40457 0 3 0x2 0x80 nanoslp syz-executor 40457 134700 1 0 3 0x2 0x80 kqread syz-executor 4057 145109 0 0 3 0x14000 0x200 bored smr 29914 415286 0 0 2 0x14000 0x200 zerothread 51168 168566 0 0 3 0x14000 0x200 aiodoned aiodoned 17354 423561 0 0 3 0x14000 0x200 syncer update 8138 486634 0 0 3 0x14000 0x200 cleaner cleaner 31642 446944 0 0 3 0x14000 0x200 reaper reaper 1126 489378 0 0 3 0x14000 0x200 pgdaemon pagedaemon 72145 239706 0 0 3 0x14000 0x200 bored viomb 10881 384330 0 0 3 0x14000 0x40000200 acpi0 acpi0 17614 277365 0 0 3 0x14000 0x40000200 idle1 26424 321965 0 0 3 0x14000 0x200 bored softnet1 841 187807 0 0 3 0x14000 0x200 bored softnet0 24036 116094 0 0 3 0x14000 0x200 bored systqmp 43631 537 0 0 3 0x14000 0x200 bored systq 51142 17466 0 0 3 0x14000 0x200 tmoslp softclockmp 24785 98086 0 0 3 0x14000 0x40000200 tmoslp softclock 3478 203873 0 0 3 0x14000 0x40000200 idle0 1 394358 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffff2006cedb610) #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_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2173 #3 uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:481 [inline] #3 uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 65244 (syz-executor) thread 0xffff80002a222540 (394357) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a157c0) #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 54498 (syz-executor) thread 0xffff800045fe6550 (32512) exclusive rrwlock inode r = 0 (0xfffff200722d2dd8) #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 Process 74902 (syz-executor) thread 0xffff8000383902c0 (208783) exclusive rwlock uobjlk r = 0 (0xfffff2006cee29d0) #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 uvm_map_protect+0xb36 sys/uvm/uvm_map.c:3202 #3 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #5 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffff2006cf104e8) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5170 #3 uvm_map_protect+0xe0 sys/uvm/uvm_map.c:3075 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 exclusive mutex &pmap->pm_mtx r = 0 (0xfffff2006cedb610) #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_write_protect+0x80 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_write_protect+0x80 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_write_protect+0x80 sys/arch/amd64/amd64/pmap.c:2173 #3 uvm_map_protect+0xb95 pmap_protect sys/arch/amd64/compile/SYZKALLER/obj/machine/pmap.h:481 [inline] #3 uvm_map_protect+0xb95 sys/uvm/uvm_map.c:3202 #4 sys_mprotect+0x351 sys/uvm/uvm_mmap.c:590 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #6 Xsyscall+0x128 Process 55779 (syz-executor) thread 0xffff80002a2234d0 (461263) exclusive rrwlock inode r = 0 (0xfffff2006d0e61e8) #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:692 #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:1807 #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 (0xfffff2006ed53478) #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:692 #6 cache_lookup+0x351 sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x1e3 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #10 namei+0x7c5 sys/kern/vfs_lookup.c:250 #11 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #12 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #13 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11056 12019K 12420K 166960K 12282 0 pcb 17 12K 12K 166960K 38 0 rtable 240 7K 7K 166960K 357 0 pf 35 17K 24K 166960K 74 0 ifaddr 44 7K 7K 166960K 46 0 ifgroup 55 2K 2K 166960K 55 0 sysctl 1 1K 9K 166960K 5 0 counters 70 37K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 1493 0 iov 0 0K 0K 166960K 4 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1299 82K 82K 166960K 1418 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 5 0K 0K 166960K 6 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 16 61K 93K 166960K 213 0 sigio 0 0K 0K 166960K 1 0 proc 21 33K 180K 166960K 577 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 103 7K 7K 166960K 104 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 115 519K 519K 166960K 115 0 exec 0 0K 1K 166960K 431 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 136 82K 168K 166960K 3831 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 19 38K 104K 166960K 1376 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 1 0 NDP 12 0K 1K 166960K 29 0 temp 35 9114K 9150K 166960K 4140 0 kqueue 2 4K 30K 166960K 46 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 28 0 0 1 0 1 1 0 8 0 rtpcb 120 39 0 39 1 0 1 1 0 8 1 rtentry 176 112 0 2 5 0 5 5 0 8 0 unpcb 144 68 0 68 1 0 1 1 0 8 1 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 30 0 29 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 129 0 127 2 0 2 2 0 8 1 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pffrag 232 4 0 1 1 0 1 1 0 482 0 pffrnode 88 4 0 1 1 0 1 1 0 8 0 pffrent 40 5 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfsrclim 320 2 0 1 1 0 1 1 0 8 0 pfstlim 224 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 8 0 3 1 0 1 1 0 8 0 pfstitem 24 27 0 0 1 0 1 1 0 8 0 pfstkey 128 27 0 0 1 0 1 1 0 8 0 pfstate 448 26 0 0 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 452 0 0 29 0 29 29 0 8 0 art_table 40 453 0 0 5 0 5 5 0 8 0 art_node 32 112 0 12 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 4 0 1 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1716 0 240 93 0 93 93 0 8 0 ffsino 296 1716 0 240 114 0 114 114 0 8 0 nchpl 144 2011 0 304 64 0 64 64 0 8 0 vnodes 216 1833 0 0 102 0 102 102 0 8 0 namei 1024 6269 0 6269 2 0 2 2 0 8 2 percpumem 16 51 0 0 1 0 1 1 0 8 0 kstatmem 264 27 0 0 2 0 2 2 0 8 0 scxspl 216 8599 0 8597 4 2 2 3 1 8 1 plimitpl 152 81 0 69 1 0 1 1 0 8 0 sigapl 424 532 0 497 7 0 7 7 0 8 1 knotepl 120 289 0 0 9 0 9 9 0 8 0 kqueuepl 224 51 0 49 2 0 2 2 0 8 1 pipepl 344 160 0 133 6 0 6 6 0 8 3 fdescpl 528 516 0 497 3 0 3 3 0 8 0 filepl 160 2099 0 1933 14 0 14 14 0 8 4 lockfpl 104 43 0 40 1 0 1 1 0 8 0 lockfspl 48 18 0 16 1 0 1 1 0 8 0 sessionpl 144 28 0 26 1 0 1 1 0 8 0 pgrppl 48 36 0 26 1 0 1 1 0 8 0 ucredpl 104 240 0 236 1 0 1 1 0 8 0 zombiepl 144 497 0 497 1 0 1 1 0 8 1 processpl 1232 532 0 497 5 0 5 5 0 8 1 procpl 664 673 0 627 6 0 6 6 0 8 0 sockpl 752 238 0 236 5 0 5 5 0 8 3 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 122 0 0 16 0 16 16 0 8 0 mcl2k 2048 15 0 0 2 0 2 2 0 8 0 mextrefs 64 16 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 152 0 0 10 0 10 10 0 8 0 bufpl 272 4099 0 105 267 0 267 267 0 8 0 anonpl 32 5511 0 0 45 0 45 45 0 247 0 amapchunkpl 152 11006 0 10638 26 0 26 26 0 158 6 amappl16 200 1693 0 1626 6 2 4 5 0 8 0 amappl15 192 22 0 22 1 1 0 1 0 8 0 amappl14 184 430 0 430 1 0 1 1 0 8 1 amappl13 176 126 0 125 1 0 1 1 0 8 0 amappl12 168 772 0 754 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 0 1 1 0 8 1 amappl10 152 67 0 67 1 0 1 1 0 8 1 amappl9 144 287 0 287 1 1 0 1 0 8 0 amappl8 136 101 0 101 1 0 1 1 0 8 1 amappl7 128 172 0 170 1 0 1 1 0 8 0 amappl6 120 159 0 159 1 0 1 1 0 8 1 amappl5 112 207 0 207 1 0 1 1 0 8 1 amappl4 104 299 0 295 1 0 1 1 0 8 0 amappl3 96 1962 0 1877 4 0 4 4 0 8 0 amappl2 88 540 0 532 2 0 2 2 0 8 0 amappl1 80 10913 0 10791 15 0 15 15 0 8 4 amappl 88 3035 0 2913 5 0 5 5 0 92 1 uvmvnodes 80 102 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 516 0 497 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 516 0 497 1 0 1 1 0 8 0 vmmpekpl 168 6307 0 6267 2 0 2 2 0 8 0 vmmpepl 168 42602 0 41706 88 0 88 88 0 357 31 vmsppl 488 515 0 497 5 0 5 5 0 8 1 rwobjpl 80 15269 0 14796 24 0 24 24 0 8 1 pdppl 4096 1039 0 994 97 42 55 85 0 8 10 pvpl 32 11521 0 0 95 2 93 93 0 265 0 pmappl 256 515 0 497 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 537 0 45 15 0 15 15 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x75bfad0c41b0, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,74) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,74) at comcnputc+0xd0 sys/dev/ic/com.c:1264 cnputc(74) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(74) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff834ae9d9) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80002a2205e0) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80002a2205e0) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80002a2205e0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80002a222540,fffff2005fa913b0,ffff80002a2207c0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff80002a222540,ffff80002a220910,ffff80002a220860) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 end trace frame: 0xffff80002a220900, count: 0 ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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 x86_bus_space_io_read_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,74) at comcnputc+0xd0 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,74) at comcnputc+0xd0 sys/dev/ic/com.c:1264 cnputc(74) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(74) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff834ae9d9) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80002a2205e0) at db_ktrap+0x1b6 db_printtrap sys/arch/amd64/amd64/db_interface.c:103 [inline] db_ktrap(6,0,ffff80002a2205e0) at db_ktrap+0x1b6 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80002a2205e0) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80002a222540,fffff2005fa913b0,ffff80002a2207c0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff80002a222540,ffff80002a220910,ffff80002a220860) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80002a220910) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a220910) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2576bf049c0, count: -16 ddb{1}>