*cpu0: uvm_fault(0xfffffd806c6c99a0, 0x98, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f372a01c5d0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c3f5390 rbx 0 rdx 0 rcx 0xffff80003c468fc0 rax 0x2a r8 0xffff80003c3f52c0 r9 0x1 r10 0x18d7c45b82207ef3 r11 0x6747399e17b438b7 r12 0 r13 0xffffffff827c7f08 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff8149c4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c3f5310 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=178169 pid=94653 tcnt=2 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c469788,0xffff80003c468d38 process=0xffff8000fffd8028 user=0xffff80003c3f0000, vmspace=0xfffffd806c6c9018 estcpu=36, cpticks=2, pctcpu=0.0, user=2, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 65738 111456 31449 0 2 0 syz-executor 65738 284251 31449 0 7 0x4000000 syz-executor 65738 253455 31449 0 3 0x4000080 fsleep syz-executor 39921 208724 71768 0 2 0 syz-executor 39921 640 71768 0 3 0x4000080 fsleep syz-executor 39921 263096 71768 0 3 0x4000080 fsleep syz-executor 39921 370643 71768 0 3 0x4000080 fsleep syz-executor *94653 178169 39767 0 7 0 syz-executor 94653 84790 39767 0 3 0x4000088 kqpoll syz-executor 60229 322268 0 0 3 0x14280 nfsidl nfsio 8069 115682 0 0 3 0x14280 nfsidl nfsio 82867 23509 0 0 3 0x14280 nfsidl nfsio 54467 308535 0 0 3 0x14280 nfsidl nfsio 2240 459378 0 0 3 0x14280 nfsidl nfsio 14512 219814 0 0 3 0x14280 nfsidl nfsio 55844 181191 0 0 3 0x14280 nfsidl nfsio 69806 32489 0 0 3 0x14280 nfsidl nfsio 81572 471833 0 0 3 0x14280 nfsidl nfsio 18302 15072 0 0 3 0x14280 nfsidl nfsio 50436 516941 0 0 3 0x14280 nfsidl nfsio 71179 411826 0 0 3 0x14280 nfsidl nfsio 98558 199423 0 0 3 0x14280 nfsidl nfsio 63738 188475 0 0 3 0x14280 nfsidl nfsio 55315 69967 0 0 3 0x14280 nfsidl nfsio 2546 270151 0 0 3 0x14280 nfsidl nfsio 5598 453729 0 0 3 0x14280 nfsidl nfsio 51056 4238 0 0 3 0x14280 nfsidl nfsio 72118 134724 0 0 3 0x14280 nfsidl nfsio 30451 157178 0 0 3 0x14280 nfsidl nfsio 42781 119522 9248 0 3 0x80 nanoslp syz-executor 42781 387080 9248 0 3 0x4000080 semwait syz-executor 42781 137595 9248 0 3 0x4000080 fsleep syz-executor 85218 451712 54607 0 3 0x100082 sbwait ndp 54607 86882 58487 0 3 0x10008a sigsusp sh 31073 426536 44019 0 3 0x82 nanoslp syz-executor 71768 67685 44019 0 3 0x82 nanoslp syz-executor 31449 419008 44019 0 3 0x82 nanoslp syz-executor 27313 478621 44019 0 3 0x2 biowait syz-executor 39767 367645 44019 0 3 0x82 nanoslp syz-executor 9248 343516 44019 0 3 0x82 nanoslp syz-executor 58487 382258 44019 0 3 0x82 wait syz-executor 35734 94875 44019 0 3 0x82 wait syz-executor 44019 110947 28946 0 3 0x82 kqread syz-executor 28946 171101 13002 0 3 0x10008a sigsusp ksh 13002 478351 3468 0 3 0x98 kqread sshd-session 3468 204547 18733 0 3 0x92 kqread sshd-session 89696 62284 1 0 3 0x100083 ttyopn getty 18733 456147 1 0 3 0x88 kqread sshd 45423 121199 93766 74 3 0x1100092 bpf pflogd 93766 447474 1 0 3 0x80 sbwait pflogd 17278 191661 72257 73 3 0x1100090 kqread syslogd 72257 33778 1 0 3 0x100082 sbwait syslogd 9373 170592 1 0 3 0x100080 kqread resolvd 80774 319318 48858 77 3 0x100092 kqread dhcpleased 60502 187468 48858 77 3 0x100092 kqread dhcpleased 48858 414312 1 0 3 0x80 kqread dhcpleased 10206 312421 0 0 3 0x14200 bored smr 86509 183122 0 0 2 0x14200 zerothread 14153 239200 0 0 3 0x14200 aiodoned aiodoned 99986 151645 0 0 3 0x14200 syncer update 95626 277139 0 0 3 0x14200 cleaner cleaner 90745 437135 0 0 3 0x14200 reaper reaper 82822 477818 0 0 3 0x14200 pgdaemon pagedaemon 15153 437494 0 0 3 0x14200 bored viomb 22623 315702 0 0 3 0x40014200 acpi0 acpi0 57557 392056 0 0 3 0x40014200 idle1 87894 34488 0 0 3 0x14200 bored softnet1 63565 279035 0 0 3 0x14200 bored softnet0 78803 228664 0 0 3 0x14200 bored systqmp 42424 306298 0 0 3 0x14200 bored systq 68988 261512 0 0 3 0x14200 tmoslp softclockmp 70270 68933 0 0 3 0x40014200 tmoslp softclock 57623 307705 0 0 3 0x40014200 idle0 1 339815 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 65738 (syz-executor) thread 0xffff80003c469a20 (284251) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a81100) #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 27313 (syz-executor) thread 0xffff8000fffef770 (478621) exclusive rrwlock inode r = 0 (0xfffffd806b706ea8) #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:686 #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+0x98a sys/kern/vfs_lookup.c:567 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #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 (0xfffffd806cd0a0b8) #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+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1887 #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11076 12280K 12408K 166960K 12585 0 pcb 17 14K 15K 166960K 74 0 rtable 252 8K 9K 166960K 411 0 pf 37 18K 20K 166960K 74 0 ifaddr 43 7K 8K 166960K 56 0 ifgroup 55 2K 3K 166960K 83 0 sysctl 1 1K 9K 166960K 7 0 counters 70 37K 38K 166960K 92 0 ioctlops 0 0K 4K 166960K 1529 0 iov 0 0K 12K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1484 93K 94K 166960K 1852 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 13 0K 0K 166960K 18 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 89K 166960K 388 0 sigio 0 0K 0K 166960K 5 0 proc 72 115K 164K 166960K 581 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 29 0 in_multi 99 7K 7K 166960K 109 0 ether_multi 1 0K 0K 166960K 3 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 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 422 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 257 156K 172K 166960K 5509 0 UVM aobj 8 2K 2K 166960K 11 0 pinsyscall 44 88K 100K 166960K 1598 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 7 0 NDP 12 0K 2K 166960K 35 0 temp 41 9079K 9150K 166960K 23334 0 kqueue 15 24K 29K 166960K 84 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 56 0 51 1 0 1 1 0 8 0 rtentry 176 124 0 12 6 0 6 6 0 8 0 unpcb 144 211 0 159 3 0 3 3 0 8 1 syncache 336 10 0 10 1 0 1 1 0 8 1 tcpcb 736 112 0 107 4 0 4 4 0 8 3 arp 136 21 0 3 1 0 1 1 0 8 0 inpcb 328 342 0 334 7 0 7 7 0 8 6 nd6 152 25 0 0 1 0 1 1 0 8 0 pkpcb 40 7 0 7 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 6 0 6 1 0 1 1 0 8 1 pppxif 1576 2 0 2 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 5 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 5 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 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 35 0 0 1 0 1 1 0 8 0 pfstkey 128 36 0 1 2 0 2 2 0 8 0 pfstate 448 36 0 1 4 0 4 4 0 8 0 pfrule 1360 25 0 19 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 477 0 14 30 0 30 30 0 8 1 art_table 40 479 0 14 5 0 5 5 0 8 0 art_node 32 124 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 8 0 3 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2115 0 652 93 0 93 93 0 8 0 ffsino 296 2115 0 652 114 0 114 114 0 8 0 nchpl 144 2673 0 974 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 2517 0 0 140 0 140 140 0 8 0 namei 1024 8482 0 8482 1 0 1 1 0 8 1 percpumem 16 61 0 11 1 0 1 1 0 8 0 kstatmem 264 41 0 14 3 0 3 3 0 8 1 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 8514 0 8513 4 3 1 3 1 8 0 plimitpl 152 54 0 37 1 0 1 1 0 8 0 sigapl 424 741 0 673 9 1 8 8 0 8 0 knotepl 120 564 0 0 18 0 18 18 0 8 0 kqueuepl 224 97 0 82 1 0 1 1 0 8 0 pipepl 344 137 0 109 3 0 3 3 0 8 0 fdescpl 528 703 0 671 3 0 3 3 0 8 0 filepl 160 3617 0 3351 16 0 16 16 0 8 4 lockfpl 104 199 0 194 1 0 1 1 0 8 0 lockfspl 48 64 0 59 1 0 1 1 0 8 0 sessionpl 144 34 0 25 1 0 1 1 0 8 0 pgrppl 48 43 0 26 1 0 1 1 0 8 0 ucredpl 104 636 0 623 1 0 1 1 0 8 0 zombiepl 144 675 0 673 1 0 1 1 0 8 0 processpl 1232 741 0 673 6 0 6 6 0 8 0 procpl 664 1179 0 1103 7 0 7 7 0 8 0 sockpl 752 631 0 566 10 0 10 10 0 8 3 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 190 0 0 12 0 12 12 0 8 0 bufpl 280 2925 0 105 202 0 202 202 0 8 0 anonpl 32 7714 0 0 63 0 63 63 0 246 0 amapchunkpl 152 16442 0 15918 22 0 22 22 0 158 0 amappl16 200 2436 0 2408 18 3 15 15 0 8 12 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 439 0 437 1 0 1 1 0 8 0 amappl13 176 131 0 118 1 0 1 1 0 8 0 amappl12 168 960 0 929 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 1 0 1 0 8 0 amappl10 152 67 0 53 1 0 1 1 0 8 0 amappl9 144 263 0 263 1 1 0 1 0 8 0 amappl8 136 104 0 102 1 0 1 1 0 8 0 amappl7 128 158 0 144 1 0 1 1 0 8 0 amappl6 120 159 0 157 1 0 1 1 0 8 0 amappl5 112 110 0 98 1 0 1 1 0 8 0 amappl4 104 315 0 295 1 0 1 1 0 8 0 amappl3 96 3210 0 3087 4 0 4 4 0 8 0 amappl2 88 586 0 523 2 0 2 2 0 8 0 amappl1 80 12135 0 11498 17 0 17 17 0 8 2 amappl 88 4689 0 4512 5 0 5 5 0 92 0 uvmvnodes 80 111 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 10 0 3 1 0 1 1 0 8 0 uaddrrnd 24 703 0 671 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 703 0 671 1 0 1 1 0 8 0 vmmpekpl 168 7923 0 7887 2 0 2 2 0 8 0 vmmpepl 168 54520 0 52550 100 0 100 100 0 357 10 vmsppl 488 702 0 671 5 0 5 5 0 8 0 rwobjpl 80 18508 0 17392 28 0 28 28 0 8 3 pdppl 4096 1413 0 1342 111 36 75 83 0 8 4 pvpl 32 14972 0 0 121 0 121 121 0 265 0 pmappl 256 702 0 671 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 290 0 39 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8389dff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83a80900) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a80900) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 intr_handler(ffff80003c489310,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(6d) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6d) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff833f0c41) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff834b57ce) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c4897c0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 end trace frame: 0xffff80003c4897b0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8389dff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff83a80900) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a80900) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 intr_handler(ffff80003c489310,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f Xspllower() at Xspllower+0x1d cnputc(6d) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6d) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff833f0c41) at db_printf+0x9b sys/kern/subr_prf.c:-1 fault(ffffffff834b57ce) at fault+0xa7 sys/arch/amd64/amd64/trap.c:161 kpageflttrap(ffff80003c4897c0,98) at kpageflttrap+0x37d sys/arch/amd64/amd64/trap.c:296 kerntrap(ffff80003c4897c0) at kerntrap+0x19d sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dovutimens(ffff80003c469a20,fffffd8068127a68,ffff80003c489980) at dovutimens+0x368 sys/kern/vfs_syscalls.c:2771 sys_futimens(ffff80003c469a20,ffff80003c489ad0,ffff80003c489a20) at sys_futimens+0xb3 sys/kern/vfs_syscalls.c:2847 syscall(ffff80003c489ad0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c489ad0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1ad9005aa50, count: -20 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: 0x7f372a01c5d0, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7f372a01c5d0, count: -1