*cpu0: uvm_fault(0xfffffa006fbc07a8, 0x98, 0, 1) -> e ddb{1}> show kasan No such command ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x724e7a465f50, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800038f9f440 rbx 0 rdx 0 rcx 0xffff800038f99cb0 rax 0x2a r8 0xffff800038f9f370 r9 0 r10 0xfe05b79b4b1620cd r11 0x16bf146089c608cc r12 0 r13 0 r14 0 r15 0 rip 0xffffffff823fc4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800038f9f3c0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=127893 pid=65128 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800038f994e8,0xffff800038f98a98 process=0xffff80003a3c0020 user=0xffff800038f9a000, vmspace=0xfffffa006fbc07a8 estcpu=36, cpticks=2, pctcpu=0.0, user=1, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND *65128 127893 86909 0 7 0 0 syz-executor 65128 38325 86909 0 7 0 0x4000000 syz-executor 37978 332795 33404 0 2 0 0 syz-executor 37978 156580 33404 0 3 0 0x4000080 ttyout syz-executor 37978 97858 33404 0 3 0 0x4000080 ttyout syz-executor 37978 360848 33404 0 2 0 0x4000000 syz-executor 79395 494235 29691 0 2 0 0 syz-executor 2312 266816 28184 0 2 0 0 syz-executor 2312 432762 28184 0 3 0 0x4000080 fsleep syz-executor 44240 176605 94973 0 3 0 0x80 nanoslp syz-executor 44240 104624 94973 0 3 0 0x4000080 ttyout syz-executor 44240 74068 94973 0 3 0 0x4000080 fsleep syz-executor 80557 91376 22474 0 2 0 0 syz-executor 80557 140935 22474 0 3 0 0x4000080 kqsel syz-executor 80557 326855 22474 0 3 0 0x4000080 fsleep syz-executor 11358 467304 18410 0 2 0 0 syz-executor 11358 98595 18410 0 3 0 0x4000080 fsleep syz-executor 11358 476205 18410 0 3 0 0x4000080 fsleep syz-executor 40556 202316 89466 0 3 0 0x80 nanoslp syz-executor 40556 29099 89466 0 3 0 0x4000000 smrbar syz-executor 40556 39093 89466 0 3 0 0x4000080 fsleep syz-executor 28184 508655 36622 0 3 0x2 0x80 nanoslp syz-executor 29691 395387 36622 0 3 0x2 0x80 nanoslp syz-executor 89466 242224 36622 0 3 0x2 0x80 nanoslp syz-executor 22474 296168 36622 0 2 0x2 0 syz-executor 86909 13503 36622 0 2 0x2 0xc80 syz-executor 18410 147736 36622 0 2 0x2 0xc80 syz-executor 33404 485974 36622 0 3 0x2 0x80 nanoslp syz-executor 94973 408247 36622 0 3 0x2 0x80 nanoslp syz-executor 36622 264603 49051 0 3 0x2 0x80 kqread syz-executor 49051 331168 16091 0 3 0x100002 0x88 sigsusp ksh 16091 276103 34579 0 3 0x10 0x88 kqread sshd-session 34579 238691 96458 0 3 0x12 0x80 kqread sshd-session 15985 20115 1 0 3 0x100003 0x80 ttyin getty 96458 181324 1 0 3 0 0x88 kqread sshd 53104 95413 25338 74 3 0x1100012 0x80 bpf pflogd 25338 430275 1 0 3 0 0x80 sbwait pflogd 92735 366241 41885 73 3 0x1100010 0x80 kqread syslogd 41885 241919 1 0 3 0x100002 0x80 sbwait syslogd 99722 406761 1 0 3 0x100000 0x80 kqread resolvd 84948 129739 62342 77 3 0x100012 0x80 kqread dhcpleased 85805 336109 62342 77 3 0x100012 0x80 kqread dhcpleased 62342 142204 1 0 3 0 0x80 kqread dhcpleased 64821 388834 0 0 3 0x14000 0x200 bored smr 92554 384415 0 0 2 0x14000 0x200 zerothread 3172 491838 0 0 3 0x14000 0x200 aiodoned aiodoned 88536 347458 0 0 3 0x14000 0x200 syncer update 53153 362601 0 0 3 0x14000 0x200 cleaner cleaner 74401 265176 0 0 3 0x14000 0x200 reaper reaper 18039 209526 0 0 3 0x14000 0x200 pgdaemon pagedaemon 10412 143136 0 0 3 0x14000 0x200 bored viomb 74214 226686 0 0 3 0x14000 0x40000200 acpi0 acpi0 54369 383999 0 0 3 0x14000 0x40000200 idle1 15463 312473 0 0 3 0x14000 0x200 bored softnet1 39937 154991 0 0 3 0x14000 0x200 bored softnet0 30335 182488 0 0 3 0x14000 0x200 bored systqmp 55479 404018 0 0 3 0x14000 0x200 bored systq 29260 400791 0 0 3 0x14000 0x200 tmoslp softclockmp 6392 479920 0 0 3 0x14000 0x40000200 tmoslp softclock 95823 176958 0 0 3 0x14000 0x40000200 idle0 1 165207 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffa000c54d810) #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_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777 #3 uvm_fault_lower+0x5d6 sys/uvm/uvm_fault.c:1504 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #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 65128 (syz-executor) thread 0xffff800038f99cb0 (127893) exclusive rwlock amaplk r = 0 (0xfffffa006cd49758) #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_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 #5 usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffa006fbc08a8) #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 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffa000c54d810) #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_enter+0x24b rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_enter+0x24b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:441 [inline] #2 pmap_enter+0x24b sys/arch/amd64/amd64/pmap.c:2777 #3 uvm_fault_lower+0x5d6 sys/uvm/uvm_fault.c:1504 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #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 65128 (syz-executor) thread 0xffff800038f98a88 (38325) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83abe180) #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 11058 12088K 12400K 166960K 12239 0 pcb 17 12K 12K 166960K 46 0 rtable 246 7K 7K 166960K 366 0 pf 37 18K 24K 166960K 87 0 ifaddr 44 7K 7K 166960K 47 0 ifgroup 57 2K 2K 166960K 59 0 sysctl 3 1K 9K 166960K 8 0 counters 74 37K 37K 166960K 78 0 ioctlops 0 0K 4K 166960K 1534 0 iov 0 0K 1K 166960K 5 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1299 82K 82K 166960K 1427 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 9K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 7 0K 0K 166960K 8 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 89K 166960K 234 0 sigio 0 0K 0K 166960K 4 0 proc 72 115K 180K 166960K 556 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 4 0 in_multi 99 6K 6K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 388 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 242 167K 177K 166960K 3956 0 UVM aobj 72 3K 3K 166960K 74 0 pinsyscall 43 86K 104K 166960K 1390 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 9 0 NDP 13 0K 2K 166960K 30 0 temp 39 9114K 9130K 166960K 8749 0 kqueue 15 24K 24K 166960K 37 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 28 0 0 1 0 1 1 0 8 0 rtpcb 120 35 0 32 1 0 1 1 0 8 0 rtentry 176 117 0 4 6 0 6 6 0 8 0 unpcb 144 90 0 71 2 0 2 2 0 8 1 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 29 0 25 1 0 1 1 0 8 0 arp 136 20 0 1 1 0 1 1 0 8 0 inpcb 328 144 0 136 2 0 2 2 0 8 1 nd6 152 26 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 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 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 7 0 2 1 0 1 1 0 8 0 pfstitem 24 27 0 0 1 0 1 1 0 8 0 pfstkey 128 60 0 33 1 0 1 1 0 8 0 pfstate 448 60 0 33 3 0 3 3 0 8 0 pfrule 1360 23 0 18 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 466 0 2 29 0 29 29 0 8 0 art_table 40 467 0 2 5 0 5 5 0 8 0 art_node 32 117 0 14 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 72 6 0 1 1 0 1 1 0 8 0 shmpl 112 71 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1733 0 265 93 0 93 93 0 8 0 ffsino 296 1733 0 265 114 0 114 114 0 8 0 nchpl 144 2076 0 370 64 0 64 64 0 8 0 rtmask 32 1 0 0 1 0 1 1 0 8 0 vnodes 216 1867 0 0 104 0 104 104 0 8 0 namei 1024 6418 0 6418 2 0 2 2 0 8 2 percpumem 16 55 0 2 1 0 1 1 0 8 0 kstatmem 264 31 0 2 3 0 3 3 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 7344 0 7344 4 3 1 3 1 8 1 plimitpl 152 102 0 85 1 0 1 1 0 8 0 sigapl 424 551 0 503 7 0 7 7 0 8 1 knotepl 120 295 0 0 9 0 9 9 0 8 0 kqueuepl 224 52 0 38 1 0 1 1 0 8 0 pipepl 344 162 0 135 6 0 6 6 0 8 3 fdescpl 528 535 0 503 3 0 3 3 0 8 0 filepl 160 2199 0 1975 13 0 13 13 0 8 3 lockfpl 104 77 0 74 1 0 1 1 0 8 0 lockfspl 48 22 0 19 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 37 0 20 1 0 1 1 0 8 0 ucredpl 104 254 0 241 1 0 1 1 0 8 0 zombiepl 144 503 0 503 1 0 1 1 0 8 1 processpl 1232 551 0 503 5 0 5 5 0 8 0 procpl 664 726 0 665 6 0 6 6 0 8 0 sockpl 752 276 0 246 5 0 5 5 0 8 2 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k 2048 75 0 0 10 0 10 10 0 8 0 mextrefs 64 22 0 0 1 0 1 1 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 183 0 0 12 0 12 12 0 8 0 bufpl 272 2629 0 105 169 0 169 169 0 8 0 anonpl 32 5463 0 0 45 0 45 45 0 247 0 amapchunkpl 152 11163 0 10647 25 0 25 25 0 158 5 amappl16 200 1595 0 1566 5 1 4 5 0 8 0 amappl15 192 8 0 7 1 0 1 1 0 8 0 amappl14 184 426 0 425 1 0 1 1 0 8 0 amappl13 176 126 0 113 1 0 1 1 0 8 0 amappl12 168 834 0 803 2 0 2 2 0 8 0 amappl11 160 3 0 3 1 1 0 1 0 8 0 amappl10 152 65 0 51 1 0 1 1 0 8 0 amappl9 144 277 0 277 1 1 0 1 0 8 0 amappl8 136 96 0 94 1 0 1 1 0 8 0 amappl7 128 159 0 146 1 0 1 1 0 8 0 amappl6 120 155 0 154 1 0 1 1 0 8 0 amappl5 112 100 0 89 1 0 1 1 0 8 0 amappl4 104 295 0 276 1 0 1 1 0 8 0 amappl3 96 1991 0 1889 3 0 3 3 0 8 0 amappl2 88 657 0 578 2 0 2 2 0 8 0 amappl1 80 10809 0 10195 16 1 15 16 0 8 2 amappl 88 3219 0 3050 6 1 5 6 0 92 1 uvmvnodes 80 100 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 73 0 2 2 0 2 2 0 8 0 uaddrrnd 24 535 0 503 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 535 0 503 1 0 1 1 0 8 0 vmmpekpl 168 6503 0 6473 2 0 2 2 0 8 0 vmmpepl 168 42765 0 40795 89 0 89 89 0 357 3 vmsppl 488 534 0 503 5 0 5 5 0 8 1 rwobjpl 80 15361 0 14253 25 0 25 25 0 8 1 pdppl 4096 1077 0 1006 97 26 71 83 0 8 0 pvpl 32 12823 0 0 104 0 104 104 0 265 0 pmappl 256 534 0 503 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 447 0 29 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8393dff0) 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_write_1(3f8,0,30) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,30) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,30) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(30) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8345f7fc) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351e3d0) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003b7cb810,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003b7cb810) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800038f98a88,fffffa006961d3c0,ffff80003b7cb9f0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 end trace frame: 0xffff80003b7cba60, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8393dff0) 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_write_1(3f8,0,30) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:790 comcnputc(800,30) at comcnputc+0x1ab bus_space_barrier sys/dev/ic/com.c:-1 [inline] comcnputc(800,30) at comcnputc+0x1ab sys/dev/ic/com.c:1268 cnputc(30) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(30) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8345f7fc) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351e3d0) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003b7cb810,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003b7cb810) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800038f98a88,fffffa006961d3c0,ffff80003b7cb9f0) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff800038f98a88,ffff80003b7cbb40,ffff80003b7cba90) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80003b7cbb40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003b7cbb40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf6fa07a2580, count: -17 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: 0x724e7a465f50, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x724e7a465f50, count: -1