*cpu0: uvm_fault(0xfffff3806d1e1020, 0x7fff0000800f, 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: 0x7041bfbea520, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80002a288ee0 rbx 0 rdx 0 rcx 0xffff800045ffd4c8 rax 0x2a r8 0xffff80002a288e10 r9 0x3 r10 0x98f39bd4b52e1630 r11 0x9d2430ec083b15a6 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff824474c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80002a288e60 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=242024 pid=11208 tcnt=1 stat=onproc flags process=10000002 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045ffca68,0xffff800045ffdca0 process=0xffff800045ff5ce8 user=0xffff80002a283000, vmspace=0xfffff3806fd817a8 estcpu=36, cpticks=14, pctcpu=0.9, user=0, sys=14, intr=0 ddb{1}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 77617 197644 11208 0 7 0 0 syz-executor 60210 470413 16461 32767 2 0x10 0xc80 syz-executor 60210 329254 16461 32767 3 0x10 0x4000080 fifor syz-executor 60210 501282 16461 32767 3 0x10 0x4000080 fsleep syz-executor 60210 238281 16461 32767 3 0x10 0x4000080 fsleep syz-executor 46870 255121 14686 32767 3 0x10 0x80 nanoslp syz-executor 46870 49375 14686 32767 3 0x10 0x4000080 kqsel syz-executor 18591 322069 52619 32767 3 0x10 0x80 piperd syz-executor 95667 484228 3166 32767 3 0x10 0x80 piperd syz-executor 96719 468762 67647 32767 3 0x10 0x80 piperd syz-executor 32019 465259 91052 32767 3 0x10 0x80 piperd syz-executor 14686 477480 7633 32767 3 0x10 0x80 nanoslp syz-executor 16461 482092 71366 32767 3 0x10 0x80 nanoslp syz-executor 3166 123103 11208 0 3 0x2 0x80 wait syz-executor 91052 415104 11208 0 3 0x2 0x80 wait syz-executor 71366 31004 11208 0 3 0x2 0x80 wait syz-executor 7633 15626 11208 0 3 0x2 0x80 wait syz-executor 67647 514014 11208 0 3 0x2 0x80 wait syz-executor 52619 316357 11208 0 3 0x2 0x80 wait syz-executor *11208 242024 65773 0 7 0x10000002 0 syz-executor 65773 47919 2028 0 3 0x100002 0x88 sigsusp ksh 2028 57504 9062 0 3 0x10 0x88 kqread sshd-session 9062 127970 28456 0 3 0x12 0x80 kqread sshd-session 37705 242049 1 0 3 0x100003 0x80 ttyin getty 28456 500910 1 0 3 0 0x88 kqread sshd 37584 465727 57539 73 3 0x1100010 0x80 kqread syslogd 57539 288017 1 0 3 0x100002 0x80 sbwait syslogd 81442 294498 1 0 3 0x100000 0x80 kqread resolvd 37860 265647 30775 77 3 0x100012 0x80 kqread dhcpleased 11425 228455 30775 77 3 0x100012 0x80 kqread dhcpleased 30775 316664 1 0 3 0 0x80 kqread dhcpleased 695 209512 0 0 3 0x14000 0x200 bored smr 89938 324950 0 0 2 0x14000 0x200 zerothread 26026 510135 0 0 3 0x14000 0x200 aiodoned aiodoned 65039 385221 0 0 3 0x14000 0x200 syncer update 58170 513995 0 0 3 0x14000 0x200 cleaner cleaner 366 95534 0 0 3 0x14000 0x200 reaper reaper 91062 319279 0 0 3 0x14000 0x200 pgdaemon pagedaemon 88289 71742 0 0 3 0x14000 0x200 bored viomb 32564 464787 0 0 3 0x14000 0x40000200 acpi0 acpi0 62273 290527 0 0 3 0x14000 0x40000200 idle1 43721 52705 0 0 3 0x14000 0x200 bored softnet1 16946 231047 0 0 2 0x14000 0x200 softnet0 30664 230423 0 0 3 0x14000 0x200 bored systqmp 62725 50423 0 0 3 0x14000 0x200 bored systq 57534 519823 0 0 3 0x14000 0x200 tmoslp softclockmp 83519 266646 0 0 3 0x14000 0x40000200 tmoslp softclock 53958 492713 0 0 3 0x14000 0x40000200 idle0 1 411078 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{1}> show all locks Process 77617 (syz-executor) thread 0xffff800045fe7ca8 (197644) shared rwlock amaplk r = 0 (0xfffff3806e384440) #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 (0xfffff3806d1e1120) #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 11208 (syz-executor) thread 0xffff800045ffd4c8 (242024) exclusive rwlock amaplk r = 0 (0xfffff3807c627018) #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 (0xfffff3806fd818a8) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11045 12014K 12034K 166960K 12142 0 pcb 17 12K 12K 166960K 17 0 rtable 199 5K 7K 166960K 355 0 pf 27 16K 16K 166960K 31 0 ifaddr 34 6K 7K 166960K 44 0 ifgroup 42 1K 2K 166960K 50 0 sysctl 1 1K 9K 166960K 5 0 counters 66 36K 37K 166960K 70 0 ioctlops 0 0K 4K 166960K 35 0 iov 0 0K 2K 166960K 6 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1288 81K 81K 166960K 1523 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 9 1K 1K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 17 58K 117K 166960K 325 0 sigio 0 0K 0K 166960K 3 0 proc 58 99K 147K 166960K 524 0 subproc 54 3K 4K 166960K 234 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 20 0 in_multi 77 5K 7K 166960K 100 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 6 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 67 307K 307K 166960K 67 0 exec 0 0K 1K 166960K 385 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 191 150K 185K 166960K 4211 0 UVM aobj 5 2K 2K 166960K 8 0 pinsyscall 38 76K 109K 166960K 1405 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 5 0 NDP 9 0K 2K 166960K 27 0 temp 28 9117K 9138K 166960K 4308 0 kqueue 15 22K 34K 166960K 62 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 47 0 44 1 0 1 1 0 8 0 rtentry 176 114 0 23 6 0 6 6 0 8 0 unpcb 144 109 0 90 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpcb 736 49 0 44 1 0 1 1 0 8 0 arp 136 18 0 4 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 219 0 209 7 0 7 7 0 8 6 nd6 152 27 0 6 1 0 1 1 0 8 0 kcovpl 48 26 0 20 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 482 0 88 31 0 31 31 0 8 3 art_table 40 483 0 88 5 0 5 5 0 8 0 art_node 32 114 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 1 1 0 1 1 0 8 1 semapl 72 7 0 0 1 0 1 1 0 8 0 shmpl 112 5 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1745 0 261 93 0 93 93 0 8 0 ffsino 296 1745 0 261 115 0 115 115 0 8 0 nchpl 144 2101 0 392 64 0 64 64 0 8 0 vnodes 216 1988 0 0 111 0 111 111 0 8 0 namei 1024 6825 0 6825 1 0 1 1 0 8 1 percpumem 16 51 0 2 1 0 1 1 0 8 0 kstatmem 264 25 0 4 2 0 2 2 0 8 0 scxspl 216 7280 0 7280 5 1 4 4 1 8 4 plimitpl 152 84 0 63 2 0 2 2 0 8 1 sigapl 424 580 0 534 7 0 7 7 0 8 1 knotepl 120 314 0 0 10 0 10 10 0 8 0 kqueuepl 224 93 0 82 3 0 3 3 0 8 2 pipepl 344 192 0 162 3 0 3 3 0 8 0 fdescpl 528 564 0 535 3 0 3 3 0 8 0 filepl 160 2569 0 2379 18 1 17 18 0 8 8 lockfpl 104 42 0 40 1 0 1 1 0 8 0 lockfspl 48 19 0 17 1 0 1 1 0 8 0 sessionpl 144 53 0 39 1 0 1 1 0 8 0 pgrppl 48 83 0 62 1 0 1 1 0 8 0 ucredpl 104 236 0 219 1 0 1 1 0 8 0 zombiepl 144 535 0 534 1 0 1 1 0 8 0 processpl 1232 580 0 534 5 0 5 5 0 8 1 procpl 664 780 0 730 6 0 6 6 0 8 1 sosppl 176 4 0 4 1 0 1 1 0 8 1 sockpl 752 379 0 347 11 0 11 11 0 8 7 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 129 0 0 17 0 17 17 0 8 0 mcl2k 2048 21 0 0 3 0 3 3 0 8 0 mextrefs 64 20 0 0 1 0 1 1 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 254 0 0 16 0 16 16 0 8 0 bufpl 272 2630 0 102 169 0 169 169 0 8 0 anonpl 32 5453 0 0 44 0 44 44 0 247 0 amapchunkpl 152 12447 0 12072 26 0 26 26 0 158 4 amappl16 200 1837 0 1821 5 2 3 5 0 8 1 amappl15 192 4 0 4 2 1 1 1 0 8 1 amappl14 184 402 0 401 1 0 1 1 0 8 0 amappl13 176 112 0 102 1 0 1 1 0 8 0 amappl12 168 795 0 768 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 62 0 52 1 0 1 1 0 8 0 amappl9 144 282 0 282 1 1 0 1 0 8 0 amappl8 136 92 0 91 1 0 1 1 0 8 0 amappl7 128 137 0 126 1 0 1 1 0 8 0 amappl6 120 147 0 146 1 0 1 1 0 8 0 amappl5 112 94 0 87 1 0 1 1 0 8 0 amappl4 104 260 0 244 1 0 1 1 0 8 0 amappl3 96 2234 0 2144 5 1 4 4 0 8 0 amappl2 88 527 0 470 2 0 2 2 0 8 0 amappl1 80 11136 0 10599 16 0 16 16 0 8 3 amappl 88 3490 0 3361 5 0 5 5 0 92 0 uvmvnodes 80 99 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 7 0 3 1 0 1 1 0 8 0 uaddrrnd 24 564 0 535 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 564 0 535 1 0 1 1 0 8 0 vmmpekpl 168 6929 0 6892 3 0 3 3 0 8 0 vmmpepl 168 45078 0 43393 102 0 102 102 0 357 19 vmsppl 488 563 0 535 7 1 6 6 0 8 1 rwobjpl 80 15986 0 15124 25 1 24 25 0 8 3 pdppl 4096 1135 0 1070 103 26 77 93 0 8 12 pvpl 32 12716 0 0 103 0 103 103 0 265 0 pmappl 256 563 0 535 4 1 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 448 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(ffffffff839b3ff0) 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+0x194 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x194 sys/dev/acpi/acpitimer.c:125 comcnputc(800,6e) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff83544691) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80002a330000) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80002a330000) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80002a330000) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b amap_lookups(fffff3806d523688,1000,ffff80002a3301f0,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff3806d523688,1000,ffff80002a3301f0,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 end trace frame: 0xffff80002a3301e0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff839b3ff0) 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+0x194 acpitimer_read sys/dev/acpi/acpitimer.c:142 [inline] acpitimer_delay(1) at acpitimer_delay+0x194 sys/dev/acpi/acpitimer.c:125 comcnputc(800,6e) at comcnputc+0x29b sys/dev/ic/com.c:1274 cnputc(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x223 sys/kern/subr_prf.c:723 db_printf(ffffffff83544691) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80002a330000) at db_ktrap+0xe3 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80002a330000) at db_ktrap+0xe3 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80002a330000) at kerntrap+0x243 sys/arch/amd64/amd64/trap.c:519 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b amap_lookups(fffff3806d523688,1000,ffff80002a3301f0,8) at amap_lookups+0x1e0 amap_chunk_get sys/uvm/uvm_amap.c:118 [inline] amap_lookups(fffff3806d523688,1000,ffff80002a3301f0,8) at amap_lookups+0x1e0 sys/uvm/uvm_amap.c:1168 uvm_fault_check(ffff80002a3302f0,ffff80002a330328,ffff80002a330360,0) at uvm_fault_check+0x8d2 sys/uvm/uvm_fault.c:840 uvm_fault(fffff3806d1e1020,e00cb30a000,0,1) at uvm_fault+0x106 sys/uvm/uvm_fault.c:627 upageflttrap(ffff80002a330490,e00cb30af70) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:192 usertrap(ffff80002a330490) at usertrap+0x430 sys/arch/amd64/amd64/trap.c:640 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7041bfbea500, count: -19 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: 0x7041bfbea520, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7041bfbea520, count: -1