uvm_fault(0xfffffd800b0631e8, 0x98, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff827885d8 cs 8 rflags 10246 cr2 98 cpl 0 rsp ffff80002a2761c0 gsbase 0xffff80002999dff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff827885d8 Starting stack trace... panic(ffffffff834ed534) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80002a276110) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800031f9bca8,fffffd806e7e8298,ffff80002a2762f0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2690 sys_futimes(ffff800031f9bca8,ffff80002a276440,ffff80002a276390) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2732 syscall(ffff80002a276440) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a276440) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfaa20ec7ba0, count: 250 End of stack trace. WARNING: SPL NOT LOWERED ON SYSCALL 83 570542528 EXIT 0 4 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 53380 55773 0 0 0 1 syz-executor 521629 29276 0 0x14000 0x200 0 systqmp savectx() at savectx+0xae end of kernel end trace frame: 0x7821345ef5e0, 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(0xfffffd800b0631e8, 0x98, 0, 1) -> e ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7821345ef5e0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003abc1c60 rbx 0 rdx 0 rcx 0xffff8000fffeefa8 rax 0x3a r8 0xffff80003abc1b90 r9 0x1 r10 0x5573c9791bdf41ec r11 0x354fdf20a2d0c59b r12 0 r13 0 r14 0xffff8000fffeefa8 r15 0 rip 0xffffffff82a403ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80003abc1be0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=53380 pid=55773 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=0xffff800031f9b778,0xffff800031f9bcb8 process=0xffff80002a37eb68 user=0xffff80003abbc000, vmspace=0xfffffd800b0631e8 estcpu=36, cpticks=4, pctcpu=0.0, user=2, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *55773 53380 35718 0 7 0 syz-executor 55773 341232 35718 0 2 0x4000000 syz-executor 1263 224456 83947 0 2 0 syz-executor 94250 162937 89643 0 3 0x3000 suspend syz-executor 94250 285416 89643 0 2 0x4081000 syz-executor 9807 183437 52594 0 3 0x90 nanoslp syz-executor 9807 222625 52594 0 3 0x4000090 fifor syz-executor 9807 354033 52594 0 3 0x4000090 fsleep syz-executor 9807 385912 52594 0 3 0x4000090 fsleep syz-executor 84484 505129 16952 0 3 0x80 nanoslp syz-executor 84484 352483 16952 0 3 0x4000080 kqsel syz-executor 84484 465782 16952 0 3 0x4000080 fsleep syz-executor 65139 377266 0 0 3 0x14200 acct acct 30731 24293 1 0 3 0x100083 ttyin getty 16952 523493 75234 0 3 0x82 nanoslp syz-executor 66503 172921 75234 0 3 0x82 wait syz-executor 35718 121429 75234 0 3 0x82 nanoslp syz-executor 42231 246665 75234 0 3 0x82 nanoslp syz-executor 26397 466080 75234 0 3 0x2 biowait syz-executor 83947 381199 75234 0 3 0x82 nanoslp syz-executor 89643 408061 75234 0 3 0x82 nanoslp syz-executor 52594 133457 75234 0 3 0x82 nanoslp syz-executor 75234 44982 1 0 3 0x82 kqread syz-executor 77325 344093 0 0 3 0x14200 bored smr 38512 480292 0 0 2 0x14200 zerothread 15317 95516 0 0 3 0x14200 aiodoned aiodoned 41767 449136 0 0 3 0x14200 syncer update 53682 284269 0 0 3 0x14200 cleaner cleaner 68434 54752 0 0 2 0x14200 reaper 97783 221367 0 0 3 0x14200 pgdaemon pagedaemon 2772 328298 0 0 3 0x14200 bored viomb 32813 304642 0 0 3 0x40014200 acpi0 acpi0 26801 137848 0 0 3 0x40014200 idle1 70939 178862 0 0 3 0x14200 bored softnet1 53747 124202 0 0 3 0x14200 bored softnet0 29276 521629 0 0 7 0x14200 systqmp 8662 7279 0 0 3 0x14200 bored systq 39813 84810 0 0 3 0x14200 tmoslp softclockmp 88682 144069 0 0 3 0x40014200 tmoslp softclock 26102 95684 0 0 3 0x40014200 idle0 1 238039 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex vmmpepl r = 0 (0xffffffff83b14df8) #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 pool_put+0xa6 sys/kern/subr_pool.c:803 #3 uvm_unmap_detach+0x1af sys/uvm/uvm_map.c:-1 #4 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2536 #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 55773 (syz-executor) thread 0xffff800031f9bca8 (341232) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a3e580) #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 26397 (syz-executor) thread 0xffff80002a223c98 (466080) exclusive rrwlock inode r = 0 (0xfffffd806eeb6dc8) #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 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3062 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806ce1c558) #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 domkdirat+0x8b sys/kern/vfs_syscalls.c:3047 #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 12168K 12366K 166960K 12628 0 pcb 18 14K 15K 166960K 93 0 rtable 252 10K 10K 166960K 420 0 pf 36 18K 25K 166960K 124 0 ifaddr 42 7K 8K 166960K 67 0 ifgroup 58 2K 2K 166960K 104 0 sysctl 3 1K 9K 166960K 10 0 counters 70 37K 38K 166960K 132 0 ioctlops 0 0K 4K 166960K 1563 0 iov 0 0K 16K 166960K 26 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1415 89K 89K 166960K 1820 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 18 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 57K 93K 166960K 470 0 sigio 0 0K 0K 166960K 5 0 proc 21 33K 147K 166960K 591 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 24 0 in_multi 95 7K 7K 166960K 115 0 ether_multi 1 0K 0K 166960K 4 0 mrt 2 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 410 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 121 82K 176K 166960K 6136 0 UVM aobj 11 2K 2K 166960K 13 0 pinsyscall 18 36K 103K 166960K 1644 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 9 0 NDP 12 0K 2K 166960K 43 0 temp 77 9128K 9160K 166960K 14460 0 kqueue 1 2K 35K 166960K 84 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 54 0 54 1 0 1 1 0 8 1 rtentry 176 125 0 15 6 0 6 6 0 8 0 unpcb 144 193 0 191 2 1 1 1 0 8 0 syncache 336 7 0 7 1 1 0 1 0 8 0 tcpcb 736 222 0 220 7 6 1 7 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 530 0 520 7 6 1 7 0 8 0 nd6 152 29 0 6 2 0 2 2 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 25 0 25 2 1 1 1 0 8 1 pppxif 1576 5 0 5 1 1 0 1 0 8 0 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pffrag 232 7 0 1 1 0 1 1 0 482 0 pffrnode 88 6 0 1 1 0 1 1 0 8 0 pffrent 40 8 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 3 0 3 1 1 0 1 0 8 0 pfstlim 224 1 0 1 1 1 0 1 0 8 0 pfanchor 1288 10 0 1 1 0 1 1 0 8 0 pftag 88 2 0 2 1 1 0 1 0 8 0 pfstitem 24 56 0 3 1 0 1 1 0 8 0 pfstkey 128 56 0 3 2 0 2 2 0 8 0 pfstate 448 54 0 3 6 0 6 6 0 8 0 pfrule 1360 24 0 19 2 1 1 2 0 8 0 rttmr 136 1 0 0 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 559 0 84 31 0 31 31 0 8 0 art_table 40 561 0 84 5 0 5 5 0 8 0 art_node 32 125 0 25 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 0 1 0 1 1 0 8 0 semapl 72 15 0 5 1 0 1 1 0 8 0 shmpl 112 10 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2179 0 710 93 0 93 93 0 8 0 ffsino 296 2179 0 710 114 0 114 114 0 8 0 nchpl 144 2874 0 1170 64 0 64 64 0 8 0 rtmask 32 8 0 8 1 1 0 1 0 8 0 vnodes 216 2622 0 0 146 0 146 146 0 8 0 namei 1024 10107 0 10106 4 3 1 3 0 8 0 percpumem 16 81 0 31 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 kstatmem 264 57 0 30 3 1 2 3 0 8 0 scsiplug 72 2 0 2 1 1 0 1 0 8 0 scxspl 216 11928 0 11927 10 8 2 8 1 8 1 plimitpl 152 73 0 63 1 0 1 1 0 8 0 sigapl 424 792 0 756 7 1 6 7 0 8 0 knotepl 120 514 0 0 16 0 16 16 0 8 0 kqueuepl 224 125 0 123 2 1 1 2 0 8 0 pipepl 344 144 0 117 3 0 3 3 0 8 0 fdescpl 528 775 0 757 3 0 3 3 0 8 0 filepl 160 4362 0 4128 17 4 13 16 0 8 1 lockfpl 104 533 0 468 3 1 2 2 0 8 0 lockfspl 48 212 0 211 1 0 1 1 0 8 0 sessionpl 144 69 0 66 1 0 1 1 0 8 0 pgrppl 48 80 0 69 1 0 1 1 0 8 0 ucredpl 104 578 0 574 1 0 1 1 0 8 0 zombiepl 144 759 0 756 1 0 1 1 0 8 0 processpl 1232 792 0 756 5 1 4 5 0 8 0 procpl 664 1385 0 1342 6 1 5 6 0 8 0 sosppl 176 3 0 3 1 1 0 1 0 8 0 sockpl 752 894 0 882 11 9 2 11 0 8 0 mcl64k 65536 7 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 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 120 0 0 15 0 15 15 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mtagpl 96 38 0 0 1 0 1 1 0 8 0 mbufpl 256 372 0 0 24 0 24 24 0 8 0 bufpl 280 5187 0 107 363 0 363 363 0 8 0 anonpl 32 7555 0 0 61 0 61 61 0 246 0 amapchunkpl 152 19602 0 19299 31 14 17 31 0 158 1 amappl16 200 2832 0 2810 30 16 14 15 0 8 11 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 432 0 431 1 0 1 1 0 8 0 amappl13 176 167 0 166 1 0 1 1 0 8 0 amappl12 168 1026 0 1010 2 0 2 2 0 8 0 amappl11 160 23 0 23 1 1 0 1 0 8 0 amappl10 152 77 0 77 1 1 0 1 0 8 0 amappl9 144 276 0 276 1 1 0 1 0 8 0 amappl8 136 114 0 114 1 1 0 1 0 8 0 amappl7 128 156 0 154 1 0 1 1 0 8 0 amappl6 120 156 0 155 1 0 1 1 0 8 0 amappl5 112 123 0 123 1 1 0 1 0 8 0 amappl4 104 324 0 321 1 0 1 1 0 8 0 amappl3 96 3774 0 3707 4 1 3 4 0 8 0 amappl2 88 556 0 545 2 0 2 2 0 8 0 amappl1 80 12371 0 12261 17 8 9 17 0 8 0 amappl 88 5286 0 5180 5 1 4 5 0 92 0 uvmvnodes 80 114 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 2 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 12 0 2 1 0 1 1 0 8 0 uaddrrnd 24 775 0 757 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 775 0 757 1 0 1 1 0 8 0 vmmpekpl 168 8421 0 8383 2 0 2 2 0 8 0 vmmpepl 168 58959 0 58171 98 47 51 98 0 357 0 vmsppl 488 774 0 756 5 1 4 5 0 8 0 rwobjpl 80 19679 0 19257 27 2 25 27 0 8 0 pdppl 4096 1557 0 1512 101 54 47 85 0 8 2 pvpl 32 14197 0 0 115 0 115 115 0 265 0 pmappl 256 774 0 756 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 301 0 67 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83994ff0) 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 msleep_nsec(ffffffff8395ac60,ffffffff8395ac78,20,ffffffff8352009b,ffffffffffffffff) at msleep_nsec+0x1e1 sys/kern/kern_synch.c:-1 taskq_next_work(ffffffff8395ac60,ffff80002a1ca5b8) at taskq_next_work+0x8e sys/kern/kern_task.c:399 taskq_thread(ffffffff8395ac60) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 end trace frame: 0x0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff83994ff0) 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 msleep_nsec(ffffffff8395ac60,ffffffff8395ac78,20,ffffffff8352009b,ffffffffffffffff) at msleep_nsec+0x1e1 sys/kern/kern_synch.c:-1 taskq_next_work(ffffffff8395ac60,ffff80002a1ca5b8) at taskq_next_work+0x8e sys/kern/kern_task.c:399 taskq_thread(ffffffff8395ac60) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 end trace frame: 0x0, 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: 0x7821345ef5e0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7821345ef5e0, count: -1 ddb{1}>