*cpu1: uvm_fault(0xfffff3006ce1d208, 0x98, 0, 1) -> e ddb{0}> show kasan No such command ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x788df209a320, count: -1 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80003b39d710 rbx 0 rdx 0 rcx 0xffff80003c3a9a18 rax 0x2a r8 0xffff80003b39d640 r9 0x4 r10 0xe606fc60f18feb04 r11 0xdd8b5e3b64941a5a r12 0 r13 0 r14 0 r15 0 rip 0xffffffff816804c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003b39d690 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{0}> show proc PROC (syz-executor) tid=230311 pid=52800 tcnt=1 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=0xffff80003c3a8a88,0xffffffff83aaa520 process=0xffff80003c3d44f0 user=0xffff80003b398000, vmspace=0xfffff3006ce1d5d8 estcpu=29, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND *52800 230311 64027 0 7 0 0 syz-executor 79840 278391 62246 0 2 0 0 syz-executor 79840 29683 62246 0 7 0 0x4000000 syz-executor 23672 412132 594 0 2 0 0 syz-executor 23672 212441 594 0 3 0 0x4000080 sbwait syz-executor 99817 67481 55158 0 2 0 0 syz-executor 99817 182649 55158 0 3 0 0x4000080 fsleep syz-executor 99817 523401 55158 0 3 0 0x4000080 fsleep syz-executor 49191 10324 38255 0 2 0x100002 0 ndp 38255 26813 81264 0 3 0x100002 0x88 sigsusp sh 12721 235450 36636 0 3 0 0x80 nanoslp syz-executor 12721 268614 36636 0 3 0 0x4000080 kqread syz-executor 12721 365014 36636 0 3 0 0x4000080 fsleep syz-executor 89250 338296 41963 0 3 0 0x80 nanoslp syz-executor 89250 456146 41963 0 3 0 0x4000000 smrbar syz-executor 89250 38303 41963 0 3 0 0x4000080 fsleep syz-executor 42792 105879 53459 0 3 0x2 0 biowait syz-executor 55158 51037 53459 0 3 0x2 0x80 nanoslp syz-executor 41963 226093 53459 0 3 0x2 0x80 nanoslp syz-executor 62246 427421 53459 0 3 0x2 0x80 nanoslp syz-executor 81264 326798 53459 0 3 0x2 0x80 wait syz-executor 594 136741 53459 0 3 0x2 0x80 nanoslp syz-executor 64027 214758 53459 0 3 0x2 0x80 nanoslp syz-executor 36636 358977 53459 0 3 0x2 0x80 nanoslp syz-executor 53459 378224 27415 0 3 0x2 0x80 kqread syz-executor 27415 253694 58716 0 3 0x100002 0x88 sigsusp ksh 58716 396760 32527 0 3 0x10 0x88 kqread sshd-session 32527 320268 21681 0 3 0x12 0x80 kqread sshd-session 65761 207605 1 0 3 0x100003 0x80 ttyin getty 21681 348146 1 0 3 0 0x88 kqread sshd 57584 120656 58836 74 3 0x1100012 0x80 bpf pflogd 58836 4462 1 0 3 0 0x80 sbwait pflogd 97310 500515 24362 73 3 0x1100010 0x80 kqread syslogd 24362 105408 1 0 3 0x100002 0x80 sbwait syslogd 92120 318569 1 0 3 0x100000 0x80 kqread resolvd 22247 85292 34739 77 3 0x100012 0x80 kqread dhcpleased 17219 58365 34739 77 3 0x100012 0x80 kqread dhcpleased 34739 16477 1 0 3 0 0x80 kqread dhcpleased 16200 302910 0 0 3 0x14000 0x200 bored smr 4158 69815 0 0 2 0x14000 0x200 zerothread 98379 422050 0 0 3 0x14000 0x200 aiodoned aiodoned 68898 204855 0 0 3 0x14000 0x200 syncer update 96446 243452 0 0 3 0x14000 0x200 cleaner cleaner 37975 62213 0 0 3 0x14000 0x200 reaper reaper 9673 131477 0 0 3 0x14000 0x200 pgdaemon pagedaemon 73713 107044 0 0 3 0x14000 0x200 bored viomb 72204 366674 0 0 3 0x14000 0x40000200 acpi0 acpi0 87189 279121 0 0 3 0x14000 0x40000200 idle1 85374 90002 0 0 3 0x14000 0x200 bored softnet1 92839 288183 0 0 3 0x14000 0x200 bored softnet0 53347 378232 0 0 3 0x14000 0x200 bored systqmp 53766 322954 0 0 3 0x14000 0x200 bored systq 14790 361195 0 0 3 0x14000 0x200 tmoslp softclockmp 85336 69546 0 0 3 0x14000 0x40000200 tmoslp softclock 95292 266569 0 0 3 0x14000 0x40000200 idle0 1 247941 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 52800 (syz-executor) thread 0xffff80003c3a9a18 (230311) shared rwlock uobjlk r = 0 (0xfffff3006df7e280) #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_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #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 shared rwlock vmmaplk r = 0 (0xfffff3006ce1d6d8) #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 79840 (syz-executor) thread 0xffff80003c3a8a88 (29683) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a8ed40) #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 42792 (syz-executor) thread 0xffff800045fee2b0 (105879) exclusive rrwlock inode r = 0 (0xfffff3006380fa08) #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 vget+0x2a2 sys/kern/vfs_subr.c:692 #6 ufs_ihashget+0x185 sys/ufs/ufs/ufs_ihash.c:98 #7 ffs_vget+0x8c sys/ufs/ffs/ffs_vfsops.c:1203 #8 ufs_lookup+0x1a36 sys/ufs/ufs/ufs_lookup.c:478 #9 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #10 vfs_lookup+0x963 sys/kern/vfs_lookup.c:580 #11 namei+0x7c5 sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff3006d198d78) #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 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1807 #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11130 12248K 12248K 166960K 12230 0 pcb 18 12K 12K 166960K 25 0 rtable 241 7K 8K 166960K 351 0 pf 36 17K 18K 166960K 49 0 ifaddr 44 7K 7K 166960K 47 0 ifgroup 57 2K 2K 166960K 59 0 sysctl 1 1K 9K 166960K 9 0 counters 74 37K 37K 166960K 78 0 ioctlops 0 0K 4K 166960K 1521 0 iov 0 0K 2K 166960K 1 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1359 85K 86K 166960K 1434 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 2 0 dirhash 15 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 18 65K 89K 166960K 149 0 proc 71 115K 164K 166960K 553 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 1 0 in_multi 99 6K 6K 166960K 99 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 43 201K 201K 166960K 43 0 exec 0 0K 1K 166960K 382 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 240 162K 170K 166960K 3253 0 UVM aobj 3 2K 2K 166960K 4 0 pinsyscall 44 88K 105K 166960K 1305 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 29 2K 2K 166960K 30 0 temp 36 9118K 9122K 166960K 3976 0 kqueue 15 24K 24K 166960K 27 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> 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 33 0 29 1 0 1 1 0 8 0 rtentry 176 111 0 1 5 0 5 5 0 8 0 unpcb 144 46 0 26 1 0 1 1 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 9 0 5 1 0 1 1 0 8 0 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 85 0 76 2 0 2 2 0 8 1 nd6 152 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 4 0 2 1 0 1 1 0 8 0 pffrag 232 1 0 0 1 0 1 1 0 482 0 pffrnode 88 1 0 0 1 0 1 1 0 8 0 pffrent 40 1 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 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 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 462 0 0 29 0 29 29 0 8 0 art_table 40 463 0 0 5 0 5 5 0 8 0 art_node 32 111 0 11 1 0 1 1 0 8 0 shmpl 112 1 0 1 1 0 1 1 0 8 1 dirhash 1024 19 0 0 3 0 3 3 0 8 0 dino2pl 256 1586 0 114 93 0 93 93 0 8 0 ffsino 296 1586 0 114 114 0 114 114 0 8 0 nchpl 144 1790 0 89 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 1744 0 0 97 0 97 97 0 8 0 namei 1024 5626 0 5626 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 scxspl 216 6182 0 6181 3 1 2 2 1 8 1 plimitpl 152 29 0 12 1 0 1 1 0 8 0 sigapl 424 466 0 418 7 0 7 7 0 8 1 knotepl 120 57 0 0 2 0 2 2 0 8 0 kqueuepl 224 25 0 14 1 0 1 1 0 8 0 pipepl 344 126 0 99 3 0 3 3 0 8 0 fdescpl 528 450 0 418 3 0 3 3 0 8 0 filepl 160 1725 0 1506 13 0 13 13 0 8 2 lockfpl 104 9 0 6 1 0 1 1 0 8 0 lockfspl 48 6 0 3 1 0 1 1 0 8 0 sessionpl 144 24 0 15 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 96 0 83 1 0 1 1 0 8 0 zombiepl 144 418 0 418 1 0 1 1 0 8 1 processpl 1232 466 0 418 5 0 5 5 0 8 0 procpl 664 498 0 442 6 0 6 6 0 8 0 sockpl 752 166 0 133 5 0 5 5 0 8 1 mcl64k 65536 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mextrefs 64 19 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 154 0 0 10 0 10 10 0 8 0 bufpl 272 2362 0 170 147 0 147 147 0 8 0 anonpl 32 7392 0 0 60 0 60 60 0 247 0 amapchunkpl 152 8761 0 8274 22 0 22 22 0 158 1 amappl16 200 2227 0 2209 14 0 14 14 0 8 12 amappl15 192 45 0 45 1 1 0 1 0 8 0 amappl14 184 431 0 429 1 0 1 1 0 8 0 amappl13 176 120 0 107 1 0 1 1 0 8 0 amappl12 168 701 0 671 2 0 2 2 0 8 0 amappl11 160 7 0 7 1 1 0 1 0 8 0 amappl10 152 85 0 70 1 0 1 1 0 8 0 amappl9 144 276 0 276 1 0 1 1 0 8 1 amappl8 136 100 0 97 1 0 1 1 0 8 0 amappl7 128 149 0 135 1 0 1 1 0 8 0 amappl6 120 153 0 151 1 0 1 1 0 8 0 amappl5 112 100 0 90 1 0 1 1 0 8 0 amappl4 104 287 0 269 1 0 1 1 0 8 0 amappl3 96 1483 0 1383 3 0 3 3 0 8 0 amappl2 88 564 0 487 2 0 2 2 0 8 0 amappl1 80 10412 0 9783 15 0 15 15 0 8 0 amappl 88 2529 0 2367 5 0 5 5 0 92 0 uvmvnodes 80 98 0 0 2 0 2 2 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 3 0 1 1 0 1 1 0 8 0 uaddrrnd 24 450 0 418 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 450 0 418 1 0 1 1 0 8 0 vmmpekpl 168 5742 0 5707 2 0 2 2 0 8 0 vmmpepl 168 38977 0 37057 93 0 93 93 0 357 5 vmsppl 488 449 0 418 5 0 5 5 0 8 0 rwobjpl 80 15058 0 13998 27 0 27 27 0 8 4 pdppl 4096 907 0 836 93 10 83 83 0 8 12 pvpl 32 12683 0 0 103 0 103 103 0 265 0 pmappl 256 449 0 418 3 0 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 412 0 13 12 0 12 12 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x788df209a320, count: -1 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,31) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,31) at comcnputc+0x250 sys/dev/ic/com.c:1274 cnputc(31) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83460681) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351d362) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c419870,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c419870) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3a8a88,fffff30060f2d970,ffff80003c419a50) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 end trace frame: 0xffff80003c419ac0, count: 0 ddb{1}> trace x86_ipi_db(ffff80002999dff0) 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_1(3f8,5) at x86_bus_space_io_read_1+0x37 sys/arch/amd64/amd64/bus_space.c:670 comcnputc(800,31) at comcnputc+0x250 comcn_read_reg sys/dev/ic/com.c:1671 [inline] comcnputc(800,31) at comcnputc+0x250 sys/dev/ic/com.c:1274 cnputc(31) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(31) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83460681) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff8351d362) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c419870,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c419870) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c3a8a88,fffff30060f2d970,ffff80003c419a50) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2691 sys_futimes(ffff80003c3a8a88,ffff80003c419ba0,ffff80003c419af0) at sys_futimes+0x208 sys/kern/vfs_syscalls.c:2733 syscall(ffff80003c419ba0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c419ba0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6ea67a573b0, count: -17