*cpu0: uvm_fault(0xfffffd806b9d13e8, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xa3021ca95f0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4499a0 rbx 0 rdx 0 rcx 0xffff80002a39c810 rax 0x2a r8 0xffff80003c4498d0 r9 0x1 r10 0x30b96fe6f76041c0 r11 0x7dd516ad686d45e1 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8323d4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c449920 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=224141 pid=94078 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a39d270,0xffffffff8390d950 process=0xffff80002a2b70d0 user=0xffff80003c444000, vmspace=0xfffffd8071ec9210 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94078 34858 44453 0 2 0 syz-executor *94078 224141 44453 0 7 0x4000000 syz-executor 14790 355189 80204 0 2 0 syz-executor 14790 472074 80204 0 3 0x4000080 kqread syz-executor 14790 382998 80204 0 2 0x4000000 syz-executor 97092 243774 45331 0 3 0x3000 suspend syz-executor 97092 232378 45331 0 3 0x4081000 biowait syz-executor 97092 403876 45331 0 3 0x4081000 inode syz-executor 60335 232540 64022 0 3 0x80 nanoslp syz-executor 60335 468767 64022 0 3 0x4000080 kqsel syz-executor 60335 209058 64022 0 3 0x4000080 fsleep syz-executor 61464 428737 0 0 3 0x14200 acct acct 40043 237545 46911 0 3 0x82 nanoslp syz-executor 45331 159165 46911 0 3 0x82 nanoslp syz-executor 60676 345536 46911 0 3 0x82 nanoslp syz-executor 44453 80725 46911 0 3 0x82 nanoslp syz-executor 56081 167260 46911 0 3 0x82 nanoslp syz-executor 64022 471883 46911 0 3 0x82 nanoslp syz-executor 92398 115651 46911 0 3 0x82 wait syz-executor 16935 37137 1 0 3 0x100083 ttyin getty 80204 29458 46911 0 3 0x82 nanoslp syz-executor 1356 256782 0 0 3 0x14200 bored sosplice 46911 100746 79673 0 3 0x82 kqread syz-executor 79673 340911 96989 0 3 0x10008a sigsusp ksh 96989 107398 92793 0 3 0x98 kqread sshd-session 92793 429657 36940 0 3 0x92 kqread sshd-session 36940 285062 1 0 3 0x88 kqread sshd 56698 337255 133 74 3 0x1100092 bpf pflogd 133 440766 1 0 3 0x80 sbwait pflogd 13439 31009 7624 73 3 0x1100090 kqread syslogd 7624 61330 1 0 3 0x100082 sbwait syslogd 87855 471672 1 0 3 0x100080 kqread resolvd 88023 258880 0 0 3 0x14200 bored smr 7992 170659 0 0 3 0x14200 pgzero zerothread 1622 424438 0 0 3 0x14200 aiodoned aiodoned 82601 49534 0 0 3 0x14200 syncer update 14273 378797 0 0 3 0x14200 cleaner cleaner 37915 75334 0 0 2 0x14200 reaper 40065 376539 0 0 3 0x14200 pgdaemon pagedaemon 23814 387316 0 0 3 0x14200 bored viomb 24876 140709 0 0 3 0x40014200 acpi0 acpi0 6389 48996 0 0 3 0x40014200 idle1 12375 322675 0 0 3 0x14200 bored softnet7 7266 448766 0 0 3 0x14200 bored softnet6 24432 210663 0 0 3 0x14200 bored softnet5 45139 514769 0 0 3 0x14200 bored softnet4 55180 438838 0 0 3 0x14200 bored softnet3 85149 337587 0 0 3 0x14200 bored softnet2 32857 150081 0 0 3 0x14200 bored softnet1 87123 142738 0 0 3 0x14200 bored softnet0 9650 120956 0 0 3 0x14200 bored systqmp 21874 347969 0 0 3 0x14200 bored systq 13724 520891 0 0 3 0x14200 tmoslp softclockmp 96371 214359 0 0 3 0x40014200 tmoslp softclock 51096 522458 0 0 3 0x40014200 idle0 1 366843 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &map->mtx r = 0 (0xffffffff8387eae8) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 vm_map_lock_ln+0x1a1 sys/uvm/uvm_map.c:5179 #4 malloc+0x8e5 sys/kern/kern_malloc.c:300 #5 amap_alloc1+0x291 sys/uvm/uvm_amap.c:353 #6 amap_alloc+0xad sys/uvm/uvm_amap.c:-1 #7 amap_copy+0x6ac sys/uvm/uvm_amap.c:569 #8 uvm_fault_check+0x930 uvmfault_amapcopy sys/uvm/uvm_fault.c:249 [inline] #8 uvm_fault_check+0x930 sys/uvm/uvm_fault.c:784 #9 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #10 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #11 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #12 recall_trap+0x8 exclusive mutex /syzkaller/managers/multicore/kernel/sys/kern/kern_malloc.c:96 r = 0 (0xffffffff837702a8) #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_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 malloc+0x2f2 sys/kern/kern_malloc.c:199 #4 amap_alloc1+0x291 sys/uvm/uvm_amap.c:353 #5 amap_alloc+0xad sys/uvm/uvm_amap.c:-1 #6 amap_copy+0x6ac sys/uvm/uvm_amap.c:569 #7 uvm_fault_check+0x930 uvmfault_amapcopy sys/uvm/uvm_fault.c:249 [inline] #7 uvm_fault_check+0x930 sys/uvm/uvm_fault.c:784 #8 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #9 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #10 usertrap+0x3c6 sys/arch/amd64/amd64/trap.c:605 #11 recall_trap+0x8 Process 94078 (syz-executor) thread 0xffff80002a39c810 (224141) Process 97092 (syz-executor) thread 0xffff80002a3477a8 (232378) Process 37915 (reaper) thread 0xffff8000ffffc008 (75334) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10275 11083K 12501K 166960K 20531 0 pcb 17 24K 28K 166960K 3441 0 rtable 232 18K 19K 166960K 2182 0 pf 46 19K 67486K 166960K 974 0 ifaddr 41 10K 12K 166960K 630 0 ifgroup 72 3K 3K 166960K 1065 0 sysctl 4 1K 9K 166960K 89 0 counters 76 37K 39K 166960K 1322 0 ioctlops 0 0K 8K 166960K 4181 0 iov 0 0K 36K 166960K 977 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1514 95K 96K 166960K 10633 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 140K 148K 166960K 64 0 VM map 2 1K 1K 166960K 2 0 sem 29 41K 46K 166960K 54 0 dirhash 12 2K 3K 166960K 258 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 10978 0 sigio 0 0K 0K 166960K 416 0 proc 70 99K 196K 166960K 2636 0 subproc 72 4K 4K 166960K 382 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1615 0 in_multi 63 4K 7K 166960K 1038 0 ether_multi 1 0K 0K 166960K 198 0 mrt 1 0K 0K 166960K 65 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 283 1261K 1261K 166960K 283 0 exec 0 0K 1K 166960K 2918 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 47 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 248 144K 187K 166960K 99124 0 UVM aobj 133 6K 6K 166960K 139 0 pinsyscall 37 74K 106K 166960K 12888 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 753 0 NDP 16 0K 2K 166960K 465 0 temp 89 8652K 8908K 166960K 504355 0 kqueue 11 20K 37K 166960K 2228 0 SYN cache 2 8K 16K 166960K 3 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 1374 0 1373 13 12 1 3 0 8 0 rtentry 176 691 0 623 5 0 5 5 0 8 0 unpcb 144 8059 0 8042 45 39 6 6 0 8 5 syncache 336 13 0 13 8 8 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 4729 0 4724 102 98 4 13 0 8 3 arp 128 85 0 73 1 0 1 1 0 8 0 inpcb 328 14959 0 14953 160 151 9 13 0 8 8 nd6 144 114 0 103 1 0 1 1 0 8 0 pkpcb 40 162 0 162 21 20 1 1 0 8 1 kcovpl 48 42 0 34 1 0 1 1 0 8 0 mppekey 1024 11 0 11 8 8 0 1 0 8 0 ppxss 1192 511 0 511 10 9 1 1 0 8 1 pppxif 1504 51 0 51 16 15 1 1 0 8 1 pfstscr 40 5 0 5 2 2 0 1 0 8 0 pffrag 232 80 0 71 2 0 2 2 0 482 0 pffrnode 88 69 0 60 1 0 1 1 0 8 0 pffrent 40 143 0 134 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 15 0 15 12 11 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfstitem 24 750 0 590 2 0 2 2 0 8 0 pfstkey 128 756 0 596 7 1 6 6 0 8 0 pfstate 384 753 0 593 21 3 18 18 0 8 0 pfrule 1344 27 0 22 2 1 1 2 0 8 0 rttmr 136 12 0 12 9 9 0 1 0 8 0 art_heap8 4096 6 0 2 6 2 4 6 0 8 0 art_heap4 256 3499 0 3179 45 21 24 30 0 8 0 art_table 40 3505 0 3181 6 1 5 5 0 8 0 art_node 32 675 0 619 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 5 1 0 1 1 0 8 0 semupl 112 3 0 3 3 3 0 1 0 8 0 semapl 112 42 0 15 1 0 1 1 0 8 0 shmpl 112 136 0 6 4 0 4 4 0 8 0 dirhash 1024 187 0 170 3 0 3 3 0 8 0 dino2pl 256 22632 0 21039 101 0 101 101 0 8 0 ffsino 296 22632 0 21039 124 0 124 124 0 8 0 nchpl 144 37486 0 36854 66 39 27 65 0 8 0 rtmask 32 95 0 95 21 20 1 1 0 8 1 uvmvnodes 80 6086 0 0 125 0 125 125 0 8 0 vnodes 216 6086 0 0 339 0 339 339 0 8 0 namei 1024 139801 0 139801 9 7 2 2 0 8 2 percpumem 16 676 0 623 1 0 1 1 0 8 0 kstatmem 264 762 0 722 7 3 4 4 0 8 1 acpiwqpl 32 5 0 5 1 0 1 1 1 8 1 scsiplug 72 33 0 33 19 19 0 1 0 8 0 scxspl 216 301294 0 301293 31 30 1 8 1 8 0 plimitpl 152 3340 0 3323 1 0 1 1 0 8 0 sigapl 424 11214 0 11161 14 5 9 9 0 8 0 knotepl 120 1054 0 0 24 0 24 24 0 8 0 kqueuepl 224 5245 0 5170 58 53 5 5 0 8 0 pipepl 344 1903 0 1874 37 28 9 14 0 8 5 fdescpl 528 11069 0 11040 3 0 3 3 0 8 0 filepl 160 88856 0 88509 98 76 22 22 0 8 5 lockfpl 104 5794 0 5793 9 8 1 2 0 8 0 lockfspl 48 1787 0 1786 1 0 1 1 0 8 0 sessionpl 144 69 0 61 1 0 1 1 0 8 0 pgrppl 48 284 0 268 1 0 1 1 0 8 0 ucredpl 104 15710 0 15699 1 0 1 1 0 8 0 zombiepl 144 13649 0 13644 1 0 1 1 0 8 0 processpl 1248 11214 0 11161 7 0 7 7 0 8 0 procpl 664 29054 0 28993 11 3 8 9 0 8 0 sosppl 168 73 0 73 16 15 1 1 0 8 1 sockpl 752 24857 0 24833 251 240 11 21 0 8 8 mcl64k 65536 25 0 0 3 0 3 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 13 0 0 2 0 2 2 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 215 0 0 14 7 7 12 0 8 0 mtagpl 96 97 0 0 3 0 3 3 0 8 0 mbufpl 256 1446 0 0 77 0 77 77 0 8 0 bufpl 280 126384 0 120241 440 0 440 440 0 8 0 anonpl 32 21826 0 0 176 1 175 175 0 246 0 amapchunkpl 152 351528 0 350874 134 99 35 44 0 158 6 amappl16 200 41488 0 41209 276 246 30 47 0 8 8 amappl15 192 6 0 6 3 3 0 1 0 8 0 amappl14 184 203 0 194 1 0 1 1 0 8 0 amappl13 176 7 0 7 4 4 0 1 0 8 0 amappl12 168 12303 0 12274 3 1 2 2 0 8 0 amappl11 160 58 0 49 1 0 1 1 0 8 0 amappl10 152 10 0 10 3 3 0 1 0 8 0 amappl9 144 246 0 245 2 1 1 1 0 8 0 amappl8 136 26 0 23 1 0 1 1 0 8 0 amappl7 128 197 0 187 1 0 1 1 0 8 0 amappl6 120 523 0 519 1 0 1 1 0 8 0 amappl5 112 270 0 262 1 0 1 1 0 8 0 amappl4 104 395 0 373 1 0 1 1 0 8 0 amappl3 96 73115 0 72993 5 1 4 4 0 8 0 amappl2 88 1382 0 1331 2 0 2 2 0 8 0 amappl1 80 54410 0 53893 17 2 15 15 0 8 0 amappl 88 95835 0 95644 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 2 0 2 2 2 0 1 0 8 0 dma4096 4096 3 0 3 2 2 0 1 0 8 0 dma2048 2048 2 0 2 2 2 0 1 0 8 0 dma1024 1024 3 0 2 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 10 0 10 5 5 0 1 0 8 0 dma128 128 267 0 267 12 12 0 1 0 8 0 dma64 64 14 0 14 8 8 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 23 0 22 1 0 1 1 0 8 0 aobjpl 72 138 0 6 3 0 3 3 0 8 0 uaddrrnd 24 11069 0 11040 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 11069 0 11040 1 0 1 1 0 8 0 vmmpekpl 168 74137 0 74062 5 0 5 5 0 8 0 vmmpepl 168 696571 0 694514 196 91 105 127 0 357 2 vmsppl 488 11068 0 11040 6 1 5 5 0 8 0 rwobjpl 80 174773 0 167449 177 18 159 160 0 8 0 pdppl 4096 22146 0 22080 212 146 66 88 0 8 0 pvpl 32 32057 0 0 255 0 255 255 0 265 0 pmappl 256 11068 0 11040 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 623 0 310 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8378fff0) 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(ffffffff8389d448) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8389d448) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3c05c0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(76) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(76) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83312900) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833cfc23) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a3c0a70,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a3c0a70) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 end trace frame: 0xffff80002a3c0af0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8378fff0) 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(ffffffff8389d448) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8389d448) at __mp_lock+0x192 sys/kern/kern_lock.c:165 intr_handler(ffff80002a3c05c0,ffff800000079a80) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(76) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(76) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29a5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83312900) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff833cfc23) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80002a3c0a70,0) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80002a3c0a70) at kerntrap+0x198 sys/arch/amd64/amd64/trap.c:491 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff8000015c1000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(11e5f,81,2000,ffff80002a39cd40) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff80002a39cd40) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80002a3c0c20) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805c902d00,81,fffffd80097fb4e0,ffff80002a39cd40) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806a21e010,ffff80002a39cd40) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806a21e010,ffff80002a39cd40) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806a21e010,ffff80002a39cd40) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806a21e010,ffff80002a39cd40) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a39cd40) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a39cd40,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a39cd40,ffff80002a3c0f90,ffff80002a3c0ee0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a3c0f90) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a3c0f90) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7941826aed10, count: -27 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xa3021ca95f0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0xa3021ca95f0, count: -1