*cpu0: uvm_fault(0xfffffd806ce9b7b8, 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: 0x7d7f265d6960, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c3b8b00 rbx 0 rdx 0 rcx 0xffff800045fee548 rax 0x2a r8 0xffff80003c3b8a30 r9 0 r10 0xa88f09ed850e0705 r11 0x4f20241f1fd50e31 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff8298a4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c3b8a80 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=149033 pid=5614 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=0xffff800045fe7248,0xffff800045fe7cb8 process=0xffff800045fea698 user=0xffff80003c3b3000, vmspace=0xfffffd806ce9b9a0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND * 5614 149033 78915 0 7 0 0 syz-executor 5614 265251 78915 0 3 0 0x4000080 fsleep syz-executor 96893 388694 64857 0 2 0 0 syz-executor 96893 398520 64857 0 3 0 0x4000080 fsleep syz-executor 41764 28685 90469 0 2 0 0 syz-executor 41764 329305 90469 0 7 0 0x4000000 syz-executor 41772 171821 87902 0 2 0x1 0 syz-executor 41772 452441 87902 0 3 0x1 0x4000080 fsleep syz-executor 20475 379010 44154 0 2 0 0 syz-executor 20475 142877 44154 0 3 0 0x4000080 fsleep syz-executor 20475 85163 44154 0 2 0 0x4000000 syz-executor 11504 83135 26006 0 2 0 0 syz-executor 11504 14490 26006 0 3 0 0x4000080 fsleep syz-executor 11504 141607 26006 0 3 0 0x4000080 fsleep syz-executor 11504 124956 26006 0 3 0 0x4000080 fsleep syz-executor 19277 343875 37934 0 2 0 0 syz-executor 19277 450465 37934 0 3 0 0x4000080 fsleep syz-executor 19277 256080 37934 0 3 0 0x4000080 fsleep syz-executor 78915 523977 25884 0 3 0x2 0x80 nanoslp syz-executor 87902 260151 25884 0 3 0x2 0x80 nanoslp syz-executor 84748 227205 25884 0 2 0x2 0 syz-executor 44154 469355 25884 0 3 0x2 0x80 nanoslp syz-executor 64857 513446 25884 0 3 0x2 0x80 nanoslp syz-executor 37934 396474 25884 0 3 0x2 0x80 nanoslp syz-executor 26006 262243 25884 0 3 0x2 0x80 nanoslp syz-executor 90469 520156 25884 0 3 0x2 0x80 nanoslp syz-executor 25884 99693 93598 0 3 0x2 0x80 kqread syz-executor 93598 467936 72197 0 3 0x100002 0x88 sigsusp ksh 72197 276816 80663 0 3 0x10 0x88 kqread sshd-session 80663 321636 18016 0 3 0x12 0x80 kqread sshd-session 92190 53263 1 0 3 0x100003 0x80 ttyin getty 18016 514733 1 0 3 0 0x88 kqread sshd 64979 359802 39820 74 3 0x1100012 0x80 bpf pflogd 39820 368196 1 0 3 0 0x80 sbwait pflogd 33968 135835 51393 73 3 0x1100010 0x80 kqread syslogd 51393 170460 1 0 3 0x100002 0x80 sbwait syslogd 57410 377910 1 0 3 0x100000 0x80 kqread resolvd 30640 20354 19212 77 3 0x100012 0x80 kqread dhcpleased 55656 31851 19212 77 3 0x100012 0x80 kqread dhcpleased 19212 366550 1 0 3 0 0x80 kqread dhcpleased 8436 373101 0 0 3 0x14000 0x200 bored smr 74703 487919 0 0 2 0x14000 0x200 zerothread 16763 329240 0 0 3 0x14000 0x200 aiodoned aiodoned 88876 253479 0 0 3 0x14000 0x200 syncer update 89930 522316 0 0 3 0x14000 0x200 cleaner cleaner 19001 178316 0 0 3 0x14000 0x200 reaper reaper 98696 295193 0 0 3 0x14000 0x200 pgdaemon pagedaemon 84153 8407 0 0 3 0x14000 0x200 bored viomb 807 150653 0 0 3 0x14000 0x40000200 acpi0 acpi0 74129 43092 0 0 3 0x14000 0x40000200 idle1 19686 3853 0 0 3 0x14000 0x200 bored softnet1 92984 395090 0 0 3 0x14000 0x200 bored softnet0 70665 264164 0 0 3 0x14000 0x200 bored systqmp 65240 469767 0 0 3 0x14000 0x200 bored systq 51598 498204 0 0 3 0x14000 0x200 tmoslp softclockmp 91773 44830 0 0 3 0x14000 0x40000200 tmoslp softclock 13325 54295 0 0 3 0x14000 0x40000200 idle0 1 313483 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks Process 5614 (syz-executor) thread 0xffff800045fee548 (149033) shared rwlock amaplk r = 0 (0xfffffd806ded60a8) #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 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 (0xfffffd806ce9baa0) #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 41764 (syz-executor) thread 0xffff800045fee018 (329305) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a23880) #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 20475 (syz-executor) thread 0xffff800045fee2b0 (85163) exclusive rwlock vmmaplk r = 0 (0xfffffd806ce9bc88) #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 84748 (syz-executor) thread 0xffff800045fef770 (227205) exclusive rwlock vmmaplk r = 0 (0xfffffd806ce9b4e8) #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 uvmspace_fork+0x12b sys/uvm/uvm_map.c:3752 #4 process_new+0x583 sys/kern/kern_fork.c:282 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd800b1f78a0) #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 uvmspace_fork+0x44 sys/uvm/uvm_map.c:3743 #4 process_new+0x583 sys/kern/kern_fork.c:282 #5 fork1+0x3f6 sys/kern/kern_fork.c:-1 #6 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11063 12213K 12213K 166960K 12177 0 pcb 17 12K 12K 166960K 23 0 rtable 228 8K 9K 166960K 383 0 pf 35 17K 22K 166960K 65 0 ifaddr 39 6K 7K 166960K 45 0 ifgroup 51 2K 2K 166960K 55 0 sysctl 3 1K 9K 166960K 7 0 counters 68 36K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 1493 0 iov 0 0K 0K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1293 81K 81K 166960K 1385 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 2 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 93K 166960K 171 0 proc 70 115K 164K 166960K 555 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 88 5K 6K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 1 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 395 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 241 167K 177K 166960K 3564 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 43 86K 102K 166960K 1360 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 15 0K 1K 166960K 28 0 temp 35 9118K 9120K 166960K 4068 0 kqueue 13 20K 22K 166960K 30 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 39 0 35 1 0 1 1 0 8 0 rtentry 176 111 0 12 5 0 5 5 0 8 0 unpcb 144 50 0 33 1 0 1 1 0 8 0 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 13 0 9 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 77 0 69 1 0 1 1 0 8 0 nd6 152 24 0 3 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 2 0 0 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 5 0 2 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfstitem 24 19 0 0 1 0 1 1 0 8 0 pfstkey 128 19 0 0 1 0 1 1 0 8 0 pfstate 448 19 0 0 3 0 3 3 0 8 0 pfrule 1360 23 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 451 0 44 29 0 29 29 0 8 1 art_table 40 452 0 44 5 0 5 5 0 8 0 art_node 32 111 0 21 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1618 0 149 93 0 93 93 0 8 0 ffsino 296 1618 0 149 114 0 114 114 0 8 0 nchpl 144 1862 0 161 64 0 64 64 0 8 0 vnodes 216 1726 0 0 96 0 96 96 0 8 0 namei 1024 5725 0 5725 4 2 2 2 0 8 2 percpumem 16 51 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 27 0 2 2 0 2 2 0 8 0 scxspl 216 6357 0 6357 4 3 1 3 1 8 1 plimitpl 152 31 0 14 1 0 1 1 0 8 0 sigapl 424 498 0 450 7 1 6 7 0 8 0 knotepl 120 58 0 0 2 0 2 2 0 8 0 kqueuepl 224 27 0 18 1 0 1 1 0 8 0 pipepl 344 131 0 104 3 0 3 3 0 8 0 fdescpl 528 482 0 450 3 0 3 3 0 8 0 filepl 160 1727 0 1509 10 0 10 10 0 8 0 lockfpl 104 24 0 21 1 0 1 1 0 8 0 lockfspl 48 12 0 9 1 0 1 1 0 8 0 sessionpl 144 26 0 16 1 0 1 1 0 8 0 pgrppl 48 34 0 16 1 0 1 1 0 8 0 ucredpl 104 124 0 111 1 0 1 1 0 8 0 zombiepl 144 453 0 453 1 0 1 1 0 8 1 processpl 1232 498 0 450 5 1 4 5 0 8 0 procpl 664 545 0 486 5 0 5 5 0 8 0 sockpl 752 166 0 137 4 0 4 4 0 8 0 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 6 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 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 13 0 0 2 0 2 2 0 8 0 mextrefs 64 17 0 0 1 0 1 1 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 166 0 0 10 0 10 10 0 8 0 bufpl 272 2352 0 105 150 0 150 150 0 8 0 anonpl 32 3784 0 0 31 0 31 31 0 247 0 amapchunkpl 152 9701 0 9183 24 0 24 24 0 158 4 amappl16 200 1853 0 1831 6 4 2 5 0 8 0 amappl15 192 8 0 8 1 1 0 1 0 8 0 amappl14 184 442 0 441 1 0 1 1 0 8 0 amappl13 176 140 0 127 1 0 1 1 0 8 0 amappl12 168 736 0 706 2 0 2 2 0 8 0 amappl11 160 3 0 3 2 1 1 1 0 8 1 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 282 0 280 1 0 1 1 0 8 0 amappl8 136 103 0 101 1 0 1 1 0 8 0 amappl7 128 188 0 175 1 0 1 1 0 8 0 amappl6 120 153 0 152 1 0 1 1 0 8 0 amappl5 112 100 0 90 1 0 1 1 0 8 0 amappl4 104 303 0 283 1 0 1 1 0 8 0 amappl3 96 1674 0 1571 3 0 3 3 0 8 0 amappl2 88 607 0 532 2 0 2 2 0 8 0 amappl1 80 10610 0 10004 15 0 15 15 0 8 2 amappl 88 2815 0 2645 4 0 4 4 0 92 0 uvmvnodes 80 101 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 482 0 450 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 482 0 450 1 0 1 1 0 8 0 vmmpekpl 168 5908 0 5877 2 0 2 2 0 8 0 vmmpepl 168 40369 0 38422 88 3 85 87 0 357 0 vmsppl 488 481 0 450 5 0 5 5 0 8 1 rwobjpl 80 15022 0 13989 24 2 22 24 0 8 0 pdppl 4096 971 0 900 107 36 71 85 0 8 0 pvpl 32 9776 0 0 80 1 79 80 0 265 0 pmappl 256 481 0 450 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 432 0 42 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83909ff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x57 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x57 sys/dev/acpi/acpitimer.c:120 comcnputc(800,2d) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(2d) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83462839) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83523df4) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c3e1f60,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c3e1f60) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b end trace frame: 0xffff80003c3e2110, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83909ff0) 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_4(b008,0) at x86_bus_space_io_read_4+0x37 sys/arch/amd64/amd64/bus_space.c:682 acpitimer_delay(1) at acpitimer_delay+0x57 acpitimer_read sys/dev/acpi/acpitimer.c:141 [inline] acpitimer_delay(1) at acpitimer_delay+0x57 sys/dev/acpi/acpitimer.c:120 comcnputc(800,2d) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(2d) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(2d) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83462839) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff83523df4) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c3e1f60,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c3e1f60) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff800045fee018,fffffd8066271cc8,ffff80003c3e2120) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimens(ffff800045fee018,ffff80003c3e2270,ffff80003c3e21c0) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2767 syscall(ffff80003c3e2270) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c3e2270) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcc747192ba0, count: -18 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: 0x7d7f265d6960, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7d7f265d6960, count: -1