uvm_fault(0xfffffd806f0a31f0, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff81fa4c08 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff80003c414840 gsbase 0xffff8000299edff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff81fa4c08 Starting stack trace... panic(ffffffff833b6083) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff80003c414790) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001634000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,2,2000,ffff80002a393cb8) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,2,2000,ffff80002a393cb8) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff80003c414940) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805ccbc2e0,2,fffffd80097fb680,ffff80002a393cb8) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806c4cf028,ffff80002a393cb8) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806c4cf028,ffff80002a393cb8) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806c4cf028,ffff80002a393cb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806c4cf028,ffff80002a393cb8) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a393cb8) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a393cb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a393cb8,ffff80003c414cb0,ffff80003c414c00) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c414cb0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c414cb0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7328555ded10, 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 *495964 92881 0 0 0 1 syz-executor 190142 54419 0 0x14000 0x200 0 systqmp proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71263dea4f20, 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(0xfffffd806f0a31f0, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71263dea4f20, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003c4433a0 rbx 0 rdx 0 rcx 0xffff8000fffeea78 rax 0x2a r8 0xffff80003c4432d0 r9 0x1 r10 0x893340527088cb6a r11 0x520ad89ba76d6439 r12 0 r13 0xffffffff826ea088 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff812c84c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003c443320 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=495964 pid=92881 tcnt=3 stat=onproc flags process=0 proc=0 runpri=86, usrpri=86, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000fffeed10,0xffff80002a393268 process=0xffff80003c41e6a0 user=0xffff80003c43e000, vmspace=0xfffffd805f06e218 estcpu=36, cpticks=7, pctcpu=0.0, user=5, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28748 120484 30503 0 2 0 syz-executor 28748 193682 30503 0 3 0x4000080 fsleep syz-executor 5328 24430 86518 0 2 0 syz-executor 5328 391066 86518 0 2 0x4000000 syz-executor *92881 495964 29847 0 7 0 syz-executor 92881 310087 29847 0 3 0x4000080 fsleep syz-executor 92881 287918 29847 0 3 0x4000080 fsleep syz-executor 15424 337005 77863 0 2 0 syz-executor 15424 300523 77863 0 3 0x4000000 biowait syz-executor 15424 479147 77863 0 3 0x4000080 fsleep syz-executor 15424 413485 77863 0 3 0x4000080 fsleep syz-executor 17065 238880 11490 0 4 0x82000 syz-executor 17065 44178 11490 0 3 0x4082000 biowait syz-executor 17065 194078 11490 0 3 0x4002000 suspend syz-executor 17065 57443 11490 0 4 0x4082000 syz-executor 15910 50236 0 0 3 0x14200 acct acct 77863 7712 16416 0 2 0x3 syz-executor 53713 150911 16416 0 3 0x82 nanoslp syz-executor 39660 271462 16416 0 3 0x82 nanoslp syz-executor 49832 1156 1 0 3 0x100083 ttyin getty 30503 409362 16416 0 3 0x82 nanoslp syz-executor 86518 425951 16416 0 2 0x3 syz-executor 11490 331039 16416 0 3 0x82 nanoslp syz-executor 30879 31962 0 0 3 0x14200 bored sosplice 72974 6393 16416 0 2 0x2 syz-executor 29847 3852 16416 0 2 0x3 syz-executor 16416 139638 58329 0 3 0x82 kqread syz-executor 58329 370687 37893 0 3 0x10008a sigsusp ksh 37893 183356 85399 0 3 0x98 kqread sshd-session 85399 520448 6858 0 3 0x92 kqread sshd-session 6858 19179 1 0 3 0x88 kqread sshd 9455 286273 35605 74 3 0x1100092 bpf pflogd 35605 415632 1 0 3 0x80 sbwait pflogd 92586 132560 83399 73 3 0x1100090 kqread syslogd 83399 411458 1 0 3 0x100082 sbwait syslogd 69896 133405 1 0 3 0x100080 kqread resolvd 29933 305272 39561 77 3 0x100092 kqread dhcpleased 62605 119708 39561 77 3 0x100092 kqread dhcpleased 39561 121652 1 0 3 0x80 kqread dhcpleased 75461 133336 0 0 3 0x14200 bored smr 62062 255328 0 0 2 0x14200 zerothread 92838 457126 0 0 3 0x14200 aiodoned aiodoned 39433 367086 0 0 3 0x14200 syncer update 47217 179001 0 0 3 0x14200 cleaner cleaner 56919 147209 0 0 2 0x14200 reaper 7061 234159 0 0 3 0x14200 pgdaemon pagedaemon 29033 260662 0 0 3 0x14200 bored viomb 62518 28345 0 0 3 0x40014200 acpi0 acpi0 56039 469002 0 0 3 0x40014200 idle1 84831 23716 0 0 3 0x14200 bored softnet1 53445 457192 0 0 3 0x14200 bored softnet0 54419 190142 0 0 7 0x14200 systqmp 69080 96725 0 0 3 0x14200 bored systq 79464 266024 0 0 3 0x14200 tmoslp softclockmp 50992 84935 0 0 3 0x40014200 tmoslp softclock 69603 347592 0 0 3 0x40014200 idle0 1 394246 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd80088b2b48) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_remove_ptes+0x29f pmap_remove_pv sys/arch/amd64/amd64/pmap.c:-1 [inline] #3 pmap_remove_ptes+0x29f sys/arch/amd64/amd64/pmap.c:1711 #4 pmap_do_remove+0x589 sys/arch/amd64/amd64/pmap.c:1920 #5 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #6 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #6 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #7 exit1+0x6fc sys/kern/kern_exit.c:260 #8 sys_exit+0x1a sys/kern/kern_exit.c:-1 #9 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c024710) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x1ad sys/kern/kern_lock.c:311 #2 mtx_enter+0x62 sys/kern/kern_lock.c:261 #3 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #3 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #4 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #6 exit1+0x6fc sys/kern/kern_exit.c:260 #7 sys_exit+0x1a sys/kern/kern_exit.c:-1 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 5328 (syz-executor) thread 0xffff8000fffee018 (391066) Process 15424 (syz-executor) thread 0xffff8000fffef770 (300523) Process 17065 (syz-executor) thread 0xffff80002a2722a8 (44178) Process 72974 (syz-executor) thread 0xffff8000fffef4d8 (6393) Process 56919 (reaper) thread 0xffff8000ffffdc90 (147209) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10247 11067K 12366K 166960K 14658 0 pcb 17 15K 17K 166960K 803 0 rtable 217 14K 15K 166960K 1103 0 pf 38 18K 67486K 166960K 436 0 ifaddr 35 7K 9K 166960K 231 0 ifgroup 59 2K 2K 166960K 428 0 sysctl 4 1K 9K 166960K 98 0 counters 70 37K 38K 166960K 502 0 ioctlops 0 0K 4K 166960K 2400 0 iov 0 0K 20K 166960K 184 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1584 100K 100K 166960K 4350 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 616K 616K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 28 16K 17K 166960K 150 0 dirhash 12 2K 3K 166960K 120 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 3676 0 sigio 0 0K 0K 166960K 109 0 proc 72 115K 164K 166960K 1177 0 subproc 72 4K 4K 166960K 172 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 455 0 in_multi 51 4K 7K 166960K 352 0 ether_multi 1 0K 0K 166960K 52 0 mrt 1 0K 0K 166960K 25 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 265 1182K 1182K 166960K 265 0 exec 0 0K 1K 166960K 1771 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 8 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 255 178K 200K 166960K 34708 0 UVM aobj 7 4K 4K 166960K 7 0 pinsyscall 42 84K 104K 166960K 5076 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 262 0 NDP 13 0K 2K 166960K 180 0 temp 82 8656K 8912K 166960K 159395 0 kqueue 13 20K 33K 166960K 681 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 120 372 0 369 2 1 1 2 0 8 0 rtentry 176 302 0 228 6 0 6 6 0 8 0 unpcb 144 3294 0 3276 32 30 2 6 0 8 1 syncache 336 14 0 14 7 6 1 1 0 8 1 tcpqe 32 6 0 6 3 3 0 1 0 8 0 tcpcb 736 1302 0 1296 29 27 2 7 0 8 1 arp 136 49 0 33 1 0 1 1 0 8 0 inpcb 328 3872 0 3862 29 27 2 7 0 8 0 nd6 152 68 0 52 1 0 1 1 0 8 0 pkpcb 40 32 0 32 9 9 0 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 ppxss 1192 172 0 172 4 3 1 1 0 8 1 pppxif 1504 8 0 8 4 4 0 1 0 8 0 pfstscr 40 5 0 4 1 0 1 1 0 8 0 pffrag 232 33 0 22 1 0 1 1 0 482 0 pffrnode 88 25 0 16 1 0 1 1 0 8 0 pffrent 40 59 0 46 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 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 276 0 181 1 0 1 1 0 8 0 pfstkey 128 282 0 187 4 0 4 4 0 8 0 pfstate 384 277 0 185 11 0 11 11 0 8 0 pfrule 1344 50 0 44 2 1 1 2 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1253 0 957 42 19 23 29 0 8 1 art_table 40 1258 0 957 5 0 5 5 0 8 0 art_node 32 295 0 227 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 11 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 141 0 115 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 91 0 74 3 0 3 3 0 8 0 dino2pl 256 8550 0 7007 98 0 98 98 0 8 0 ffsino 296 8550 0 7007 120 0 120 120 0 8 0 nchpl 144 13671 0 13033 66 41 25 64 0 8 0 rtmask 32 22 0 22 7 6 1 1 0 8 1 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 47338 0 47337 4 3 1 2 0 8 0 percpumem 16 266 0 216 1 0 1 1 0 8 0 kstatmem 264 288 0 258 7 4 3 3 0 8 0 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 scsiplug 72 22 0 22 9 9 0 1 0 8 0 scxspl 216 95530 0 95528 14 13 1 8 1 8 0 plimitpl 152 1251 0 1232 1 0 1 1 0 8 0 sigapl 424 3981 0 3931 10 3 7 8 0 8 0 knotepl 120 994 0 0 26 0 26 26 0 8 0 kqueuepl 224 1395 0 1385 16 15 1 5 0 8 0 pipepl 344 697 0 670 16 13 3 9 0 8 0 fdescpl 528 3903 0 3872 3 0 3 3 0 8 0 filepl 160 27479 0 27256 43 31 12 20 0 8 1 lockfpl 104 1508 0 1506 3 2 1 2 0 8 0 lockfspl 48 528 0 526 1 0 1 1 0 8 0 sessionpl 144 40 0 31 1 0 1 1 0 8 0 pgrppl 48 92 0 75 1 0 1 1 0 8 0 ucredpl 104 4442 0 4429 1 0 1 1 0 8 0 zombiepl 144 5230 0 5228 2 1 1 1 0 8 0 processpl 1232 3981 0 3931 7 1 6 6 0 8 0 procpl 664 10143 0 10081 8 0 8 8 0 8 0 sosppl 168 16 0 16 10 9 1 1 0 8 1 sockpl 752 7672 0 7641 76 67 9 17 0 8 4 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 7 0 0 1 0 1 1 0 8 0 mcl4k 4096 118 0 0 15 0 15 15 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 108 0 0 7 0 7 7 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 1299 0 0 74 0 74 74 0 8 0 bufpl 280 38811 0 32674 439 0 439 439 0 8 0 anonpl 32 12685 0 0 103 0 103 103 0 246 0 amapchunkpl 152 121886 0 121204 58 29 29 35 0 158 0 amappl16 200 14435 0 14367 93 77 16 30 0 8 5 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 18 0 17 1 0 1 1 0 8 0 amappl13 176 563 0 562 1 0 1 1 0 8 0 amappl12 168 4357 0 4316 3 0 3 3 0 8 0 amappl11 160 24 0 24 1 1 0 1 0 8 0 amappl10 152 49 0 34 1 0 1 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 30 0 27 1 0 1 1 0 8 0 amappl7 128 137 0 136 1 0 1 1 0 8 0 amappl6 120 415 0 401 1 0 1 1 0 8 0 amappl5 112 81 0 70 1 0 1 1 0 8 0 amappl4 104 547 0 516 1 0 1 1 0 8 0 amappl3 96 21799 0 21703 5 1 4 4 0 8 1 amappl2 88 4054 0 3978 2 0 2 2 0 8 0 amappl1 80 26521 0 25926 17 2 15 15 0 8 0 amappl 88 33081 0 32907 5 0 5 5 0 92 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 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 dma2048 2048 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 9 0 9 3 3 0 1 0 8 0 dma128 128 258 0 258 4 4 0 1 0 8 0 dma64 64 11 0 11 4 4 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 21 0 20 1 0 1 1 0 8 0 aobjpl 72 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 3903 0 3873 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3903 0 3873 1 0 1 1 0 8 0 vmmpekpl 168 30525 0 30461 4 0 4 4 0 8 0 vmmpepl 168 253485 0 251543 152 52 100 111 0 357 6 vmsppl 488 3903 0 3872 7 2 5 5 0 8 0 rwobjpl 80 72549 0 65630 158 10 148 150 0 8 1 pdppl 4096 7816 0 7744 144 72 72 84 0 8 0 pvpl 32 21276 0 0 171 1 170 170 0 265 0 pmappl 256 3903 0 3872 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 445 0 135 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837fcff0) 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_release_all(ffffffff83910870) at __mp_release_all+0xd8 sys/kern/kern_lock.c:215 msleep_nsec(ffffffff837d7fd0,ffffffff837d7fe8,20,ffffffff833e4e1f,ffffffffffffffff) at msleep_nsec+0x1e1 sys/kern/kern_synch.c:-1 taskq_next_work(ffffffff837d7fd0,ffff80002a21a188) at taskq_next_work+0x8e sys/kern/kern_task.c:399 taskq_thread(ffffffff837d7fd0) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 end trace frame: 0x0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff837fcff0) 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_release_all(ffffffff83910870) at __mp_release_all+0xd8 sys/kern/kern_lock.c:215 msleep_nsec(ffffffff837d7fd0,ffffffff837d7fe8,20,ffffffff833e4e1f,ffffffffffffffff) at msleep_nsec+0x1e1 sys/kern/kern_synch.c:-1 taskq_next_work(ffffffff837d7fd0,ffff80002a21a188) at taskq_next_work+0x8e sys/kern/kern_task.c:399 taskq_thread(ffffffff837d7fd0) at taskq_thread+0x1d5 sys/kern/kern_task.c:439 end trace frame: 0x0, count: -7 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: 0x71263dea4f20, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x71263dea4f20, count: -1