uvm_fault(0xfffffd806b50c9b0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff8180fc08 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c44d5d0 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff8180fc08 Starting stack trace... panic(ffffffff833a3f01) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c44d520) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff80000148a000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:586 dtclose(21e5f,81,2000,ffff800033c08a80) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(21e5f,81,2000,ffff800033c08a80) at dtclose+0x109 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c44d6d0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd80722fa8d0,81,fffffd80097fb820,ffff800033c08a80) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806e49d010,ffff800033c08a80) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806e49d010,ffff800033c08a80) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806e49d010,ffff800033c08a80) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806e49d010,ffff800033c08a80) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff800033c08a80) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff800033c08a80,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff800033c08a80,ffff80003c44da40,ffff80003c44d990) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c44da40) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c44da40) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d668ab0a550, count: 242 End of stack trace. WARNING: SPL NOT LOWERED ON TRAP EXIT 4 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *401385 2400 0 0 0 1 syz-executor 194994 59787 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7eb46cbe3410, count: 14 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd806b50c9b0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7eb46cbe3410, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000303fbcb0 rbx 0 rdx 0 rcx 0xffff8000344134f8 rax 0x2a r8 0xffff8000303fbbe0 r9 0x1 r10 0xc5788990bf708b63 r11 0xd981bb3426117385 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff81c944c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff8000303fbc30 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=401385 pid=2400 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=0xffff800033c08a80,0xffff800033c09cb8 process=0xffff80002a2c2698 user=0xffff8000303f6000, vmspace=0xfffffd800b027b70 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND * 2400 401385 39018 0 7 0 syz-executor 2400 35770 39018 0 3 0x4000080 fsleep syz-executor 5779 463833 81749 0 3 0x80 nanoslp syz-executor 5779 232808 81749 0 3 0x4000080 sysctllk syz-executor 5779 519924 81749 0 3 0x4000080 fsleep syz-executor 16626 199640 77812 0 3 0x80 nanoslp syz-executor 16626 479253 77812 0 3 0x4000080 lockf syz-executor 16626 135459 77812 0 3 0x4000080 fsleep syz-executor 16626 352888 77812 0 3 0x4000080 fsleep syz-executor 48891 498248 98636 0 3 0x80 nanoslp syz-executor 48891 429907 98636 0 3 0x4000080 sysctllk syz-executor 79483 110436 47392 0 3 0x80 nanoslp syz-executor 79483 146546 47392 0 3 0x4000080 kqsel syz-executor 79483 451469 47392 0 3 0x4000080 fsleep syz-executor 70875 121326 18912 0 3 0x100082 sysctllk ndp 18912 519016 73413 0 3 0x10008a sigsusp sh 90507 246214 46060 0 3 0 vmmapbsy syz-executor 90507 53979 46060 0 3 0x4000000 vmmapbsy syz-executor 90507 149694 46060 0 3 0x4000000 fltagain2 syz-executor 73413 400049 86238 0 3 0x82 wait syz-executor 58732 18054 0 0 3 0x14280 nfsidl nfsio 6514 281912 0 0 3 0x14280 nfsidl nfsio 69058 361362 0 0 3 0x14280 nfsidl nfsio 16881 120436 0 0 3 0x14280 nfsidl nfsio 61339 340828 0 0 3 0x14280 nfsidl nfsio 17726 116083 0 0 3 0x14280 nfsidl nfsio 53462 484037 0 0 3 0x14280 nfsidl nfsio 16786 387120 0 0 3 0x14280 nfsidl nfsio 7803 345909 0 0 3 0x14280 nfsidl nfsio 85573 53940 0 0 3 0x14280 nfsidl nfsio 43612 402516 0 0 3 0x14280 nfsidl nfsio 39835 99140 0 0 3 0x14280 nfsidl nfsio 57018 97243 0 0 3 0x14280 nfsidl nfsio 9195 234345 0 0 3 0x14280 nfsidl nfsio 62070 364703 0 0 3 0x14280 nfsidl nfsio 34256 253542 0 0 3 0x14280 nfsidl nfsio 77812 334599 86238 0 3 0x82 nanoslp syz-executor 7280 513752 0 0 3 0x14280 nfsidl nfsio 89092 278814 0 0 3 0x14280 nfsidl nfsio 76175 140706 0 0 3 0x14280 nfsidl nfsio 53265 15281 0 0 3 0x14280 nfsidl nfsio 78190 310800 1 0 3 0x100083 ttyopn getty 81430 444843 0 0 3 0x14200 bored sosplice 47392 56459 86238 0 3 0x82 nanoslp syz-executor 6186 416092 86238 0 3 0x82 nanoslp syz-executor 39018 192496 86238 0 3 0x82 nanoslp syz-executor 46060 340979 86238 0 3 0x82 wait syz-executor 98636 33607 86238 0 3 0x82 nanoslp syz-executor 81749 37633 86238 0 3 0x82 nanoslp syz-executor 86238 189470 6757 0 3 0x82 kqread syz-executor 6757 426366 85851 0 3 0x10008a sigsusp ksh 85851 426055 55356 0 3 0x98 kqread sshd-session 55356 389117 41982 0 3 0x92 kqread sshd-session 41982 366830 1 0 3 0x88 kqread sshd 74728 353578 27925 74 3 0x1100092 bpf pflogd 27925 3625 1 0 3 0x80 sbwait pflogd 50292 105211 87568 73 3 0x1100090 kqread syslogd 87568 521466 1 0 3 0x100082 sbwait syslogd 73854 481804 1 0 3 0x100080 kqread resolvd 62470 81272 32294 77 3 0x100092 sysctllk dhcpleased 99795 445550 32294 77 3 0x100092 kqread dhcpleased 32294 206667 1 0 3 0x80 kqread dhcpleased 72047 512596 0 0 3 0x14200 bored smr 23047 341702 0 0 3 0x14200 pgzero zerothread 75483 456764 0 0 3 0x14200 aiodoned aiodoned 43811 519455 0 0 3 0x14200 syncer update 5053 54354 0 0 3 0x14200 cleaner cleaner 59787 194994 0 0 7 0x14200 reaper 64462 16052 0 0 3 0x14200 pgdaemon pagedaemon 42005 192611 0 0 3 0x14200 bored viomb 98583 330707 0 0 3 0x40014200 acpi0 acpi0 22638 414192 0 0 3 0x40014200 idle1 37090 182015 0 0 3 0x14200 bored softnet7 39253 205540 0 0 3 0x14200 bored softnet6 5369 268750 0 0 3 0x14200 bored softnet5 41068 92715 0 0 3 0x14200 bored softnet4 48699 318386 0 0 3 0x14200 bored softnet3 85517 87060 0 0 3 0x14200 bored softnet2 65990 163699 0 0 3 0x14200 bored softnet1 70838 491582 0 0 3 0x14200 netlock softnet0 81333 417135 0 0 2 0x40014200 systqmp 94772 310413 0 0 3 0x14200 bored systq 46045 150512 0 0 3 0x14200 tmoslp softclockmp 6786 267159 0 0 3 0x40014200 tmoslp softclock 71922 504399 0 0 3 0x40014200 idle0 1 500898 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 90507 (syz-executor) thread 0xffff80003c440a88 (53979) Process 90507 (syz-executor) thread 0xffff800033c08d18 (149694) Process 59787 (reaper) thread 0xffff8000ffffc7d0 (194994) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10226 11048K 11191K 166960K 12063 0 pcb 20 16K 23K 166960K 298 0 rtable 195 9K 10K 166960K 508 0 pf 37 18K 81K 166960K 151 0 ifaddr 38 6K 8K 166960K 110 0 ifgroup 59 2K 2K 166960K 177 0 sysctl 4 1K 9K 166960K 15 0 counters 70 37K 37K 166960K 164 0 ioctlops 0 0K 4K 166960K 1759 0 iov 0 0K 24K 166960K 102 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1495 94K 94K 166960K 2295 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 16 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 113 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 110K 166960K 1233 0 sigio 0 0K 0K 166960K 30 0 proc 73 131K 164K 166960K 779 0 subproc 72 4K 4K 166960K 108 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 361 0 in_multi 68 5K 7K 166960K 214 0 ether_multi 1 0K 0K 166960K 14 0 mrt 1 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 604 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 260 161K 175K 166960K 12742 0 UVM aobj 88 4K 4K 166960K 89 0 pinsyscall 45 90K 104K 166960K 2427 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 85 0 NDP 13 0K 2K 166960K 72 0 temp 73 8654K 8905K 166960K 68853 0 kqueue 13 20K 32K 166960K 267 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 120 246 0 242 4 1 3 3 0 8 2 rtentry 176 169 0 95 5 0 5 5 0 8 0 unpcb 144 987 0 968 9 5 4 6 0 8 3 syncache 336 9 0 9 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 607 0 601 13 6 7 7 0 8 6 arp 136 21 0 9 1 0 1 1 0 8 0 inpcb 328 1648 0 1634 20 13 7 12 0 8 5 nd6 144 29 0 16 1 0 1 1 0 8 0 pkpcb 40 16 0 16 1 0 1 1 0 8 1 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1192 28 0 28 2 2 0 1 0 8 0 pppxif 1504 7 0 7 2 2 0 1 0 8 0 pffrag 232 12 0 4 1 0 1 1 0 482 0 pffrnode 88 11 0 4 1 0 1 1 0 8 0 pffrent 40 18 0 10 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 4 0 4 2 2 0 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 5 0 5 2 2 0 1 0 8 0 pfstitem 24 77 0 21 1 0 1 1 0 8 0 pfstkey 128 79 0 23 2 0 2 2 0 8 0 pfstate 384 77 0 22 6 0 6 6 0 8 0 pfrule 1344 27 0 22 2 1 1 2 0 8 0 rttmr 136 4 0 4 2 2 0 1 0 8 0 art_heap8 4096 6 0 0 6 0 6 6 0 8 0 art_heap4 256 817 0 469 30 7 23 29 0 8 0 art_table 40 823 0 469 5 0 5 5 0 8 0 art_node 32 169 0 108 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 16 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 105 0 95 1 0 1 1 0 8 0 shmpl 112 86 0 1 3 0 3 3 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3708 0 2197 95 0 95 95 0 8 0 ffsino 296 3708 0 2197 117 0 117 117 0 8 0 nchpl 144 5377 0 3665 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 1 0 1 0 8 0 uvmvnodes 80 4210 0 0 86 0 86 86 0 8 0 vnodes 216 4210 0 0 234 0 234 234 0 8 0 namei 1024 18782 0 18782 1 0 1 1 0 8 1 percpumem 16 97 0 47 1 0 1 1 0 8 0 kstatmem 264 102 0 70 3 0 3 3 0 8 0 scsiplug 72 6 0 6 4 3 1 1 0 8 1 scxspl 216 22758 0 22758 11 9 2 8 1 8 2 plimitpl 152 320 0 302 1 0 1 1 0 8 0 sigapl 424 1562 0 1486 9 0 9 9 0 8 0 knotepl 120 806 0 0 25 0 25 25 0 8 0 kqueuepl 224 508 0 496 7 4 3 5 0 8 2 pipepl 344 212 0 185 3 0 3 3 0 8 0 fdescpl 528 1502 0 1469 3 0 3 3 0 8 0 filepl 160 9705 0 9477 22 7 15 20 0 8 4 lockfpl 104 568 0 564 3 2 1 2 0 8 0 lockfspl 48 213 0 210 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 55 0 38 1 0 1 1 0 8 0 ucredpl 104 1626 0 1613 1 0 1 1 0 8 0 zombiepl 144 1487 0 1486 1 0 1 1 0 8 0 processpl 1232 1562 0 1486 6 0 6 6 0 8 0 procpl 664 3467 0 3380 8 0 8 8 0 8 0 sosppl 168 8 0 8 3 2 1 1 0 8 1 sockpl 752 2991 0 2953 42 30 12 21 0 8 8 mcl64k 65536 20 0 0 3 1 2 3 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 113 0 0 15 1 14 15 0 8 0 mcl2k 2048 46 0 0 6 0 6 6 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 287 0 0 18 0 18 18 0 8 0 bufpl 280 8391 0 2248 439 0 439 439 0 8 0 anonpl 32 10195 0 0 82 0 82 82 0 246 0 amapchunkpl 152 43277 0 42676 43 12 31 37 0 158 6 amappl16 200 5425 0 5336 42 27 15 18 0 8 8 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 129 0 116 1 0 1 1 0 8 0 amappl13 176 3 0 3 2 2 0 1 0 8 0 amappl12 168 2209 0 2176 3 1 2 2 0 8 0 amappl11 160 72 0 58 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 1 0 1 0 8 0 amappl9 144 314 0 314 1 1 0 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 130 0 117 1 0 1 1 0 8 0 amappl6 120 222 0 217 1 0 1 1 0 8 0 amappl5 112 141 0 131 1 0 1 1 0 8 0 amappl4 104 315 0 295 1 0 1 1 0 8 0 amappl3 96 7425 0 7324 5 2 3 3 0 8 0 amappl2 88 1777 0 1694 2 0 2 2 0 8 0 amappl1 80 13841 0 13205 16 2 14 15 0 8 0 amappl 88 11811 0 11628 6 1 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma16384 16384 1 0 1 1 1 0 1 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 88 0 1 2 0 2 2 0 8 0 uaddrrnd 24 1502 0 1469 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1502 0 1469 1 0 1 1 0 8 0 vmmpekpl 168 13278 0 13230 3 0 3 3 0 8 0 vmmpepl 168 100765 0 98612 107 3 104 104 0 357 6 vmsppl 488 1501 0 1469 6 1 5 5 0 8 0 rwobjpl 80 32658 0 27308 112 0 112 112 0 8 2 pdppl 4096 3012 0 2938 108 34 74 86 0 8 0 pvpl 32 17738 0 0 143 0 143 143 0 265 0 pmappl 256 1501 0 1469 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 311 0 56 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837f0ff0) 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 __mp_lock(ffffffff8391e360) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80002a268bd0,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8391e360) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 reaper(ffff8000ffffc7d0) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 3 ddb{0}> trace x86_ipi_db(ffffffff837f0ff0) 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 __mp_lock(ffffffff8391e360) at __mp_lock+0x199 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) at __mp_lock+0x199 sys/kern/kern_lock.c:165 intr_handler(ffff80002a268bd0,ffff800000069c00) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff8391e360) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff8391e360) at __mp_lock+0x192 sys/kern/kern_lock.c:165 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:847 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 reaper(ffff8000ffffc7d0) at reaper+0x13b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -12 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: 0x7eb46cbe3410, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7eb46cbe3410, count: -1