uvm_fault(0xfffffd805d493400, 0x0, 0, 1) -> e fatal page fault in supervisor mode trap type 6 code 0 rip ffffffff82fa62b8 cs 8 rflags 10207 cr2 0 cpl 0 rsp ffff8000343d2570 gsbase 0xffff8000299ddff0 kgsbase 0x0 panic: trap type 6, code=0, pc=ffffffff82fa62b8 Starting stack trace... panic(ffffffff833da083) at panic+0x1d0 sys/kern/subr_prf.c:229 kerntrap(ffff8000343d24c0) at kerntrap+0x30b alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001593000) at dt_ioctl_record_stop+0x108 sys/dev/dt/dt_dev.c:593 dtclose(11e5f,1,2000,ffff80002a369788) at dtclose+0x109 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,1,2000,ffff80002a369788) at dtclose+0x109 sys/dev/dt/dt_dev.c:239 spec_close(ffff8000343d2670) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd800f4a6e98,1,fffffd80097fd3a8,ffff80002a369788) at VOP_CLOSE+0x132 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806ab2a9c8,ffff80002a369788) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806ab2a9c8,ffff80002a369788) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd806ab2a9c8,ffff80002a369788) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806ab2a9c8,ffff80002a369788) at closef+0x192 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a369788) at fdfree+0x116 sys/kern/kern_descrip.c:1195 exit1(ffff80002a369788,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a369788,ffff8000343d29e0,ffff8000343d2930) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff8000343d29e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000343d29e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7db0b2c42300, 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 * 21233 80621 0 0 0 1 syz-executor 507662 92012 0 0x14000 0x200 0 reaper proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7efeaa118f40, 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(0xfffffd805d493400, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7efeaa118f40, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000317f9a50 rbx 0 rdx 0 rcx 0xffff80002a3682c8 rax 0x2a r8 0xffff8000317f9980 r9 0x1 r10 0x3293815328631757 r11 0x72b3aa84ab856f74 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff810344c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff8000317f99d0 ss 0x10 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=21233 pid=80621 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=0xffff80002a368d28,0xffff8000fffe2fc8 process=0xffff800031bc9d08 user=0xffff8000317f4000, vmspace=0xfffffd800b063d58 estcpu=36, cpticks=6, pctcpu=0.0, user=5, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 36028 387634 87098 0 2 0 syz-executor 36028 229427 87098 0 3 0x4000080 fsleep syz-executor 67028 390956 31919 0 2 0 syz-executor 67028 64784 31919 0 3 0x4000080 fsleep syz-executor 40255 92123 0 0 3 0x14200 acct acct *80621 21233 17554 0 7 0 syz-executor 80621 516003 17554 0 3 0x4000080 fsleep syz-executor 61965 177241 10420 0 4 0x82000 syz-executor 61965 382880 10420 0 3 0x4002000 suspend syz-executor 61965 252822 10420 0 2 0x4082000 syz-executor 4263 195437 78741 0 3 0x2 biowait syz-executor 56339 100792 1 0 3 0x100083 ttyopn getty 55048 419198 78741 0 3 0x82 wait syz-executor 31919 56605 78741 0 3 0x82 nanoslp syz-executor 87098 225898 78741 0 3 0x82 nanoslp syz-executor 17554 186225 78741 0 3 0x82 nanoslp syz-executor 2382 383329 78741 0 3 0x82 nanoslp syz-executor 15499 17478 78741 0 3 0x82 nanoslp syz-executor 10420 232832 78741 0 3 0x82 nanoslp syz-executor 78741 235104 43728 0 3 0x82 kqread syz-executor 43728 40795 44934 0 3 0x10008a sigsusp ksh 44934 333210 55936 0 3 0x98 kqread sshd-session 55936 359608 6250 0 3 0x92 kqread sshd-session 6250 46211 1 0 3 0x88 kqread sshd 64147 492385 28048 74 3 0x1100092 bpf pflogd 28048 518694 1 0 3 0x80 sbwait pflogd 50640 146962 88080 73 3 0x1100090 kqread syslogd 88080 7533 1 0 3 0x100082 sbwait syslogd 7482 29767 1 0 3 0x100080 kqread resolvd 43127 333229 78542 77 3 0x100092 kqread dhcpleased 8007 442089 78542 77 3 0x100092 kqread dhcpleased 78542 392184 1 0 3 0x80 kqread dhcpleased 81393 184240 0 0 3 0x14200 bored smr 62964 231493 0 0 2 0x14200 zerothread 26770 447960 0 0 3 0x14200 aiodoned aiodoned 84034 88285 0 0 3 0x14200 syncer update 79634 98793 0 0 3 0x14200 cleaner cleaner 92012 507662 0 0 7 0x14200 reaper 74153 303087 0 0 3 0x14200 pgdaemon pagedaemon 62811 238747 0 0 3 0x14200 bored viomb 98048 162424 0 0 3 0x40014200 acpi0 acpi0 91740 179804 0 0 3 0x40014200 idle1 89840 138614 0 0 3 0x14200 bored softnet1 87820 454767 0 0 3 0x14200 netlock softnet0 35458 282192 0 0 2 0x40014200 systqmp 36154 150480 0 0 3 0x14200 bored systq 38058 82022 0 0 3 0x14200 tmoslp softclockmp 5703 59848 0 0 3 0x40014200 tmoslp softclock 69719 450465 0 0 3 0x40014200 idle0 1 240631 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 4263 (syz-executor) thread 0xffff80002a368030 (195437) exclusive rrwlock inode r = 0 (0xfffffd806e6f6ef0) #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:570 #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+0x93a sys/kern/vfs_lookup.c:566 #11 namei+0x7ca sys/kern/vfs_lookup.c:250 #12 dounlinkat+0xc1 sys/kern/vfs_syscalls.c:1868 #13 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c822458) #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:570 #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:1868 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 Process 92012 (reaper) thread 0xffff8000ffffd760 (507662) exclusive rwlock kmmaplk r = 0 (0xffffffff83952358) #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 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5165 #3 uvm_unmap+0x7d sys/uvm/uvm_map.c:1792 #4 km_free+0x87 sys/uvm/uvm_km.c:714 #5 uvm_uarea_free+0x4f sys/uvm/uvm_glue.c:304 #6 reaper+0x1ca sys/kern/kern_exit.c:493 #7 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11089 12128K 12311K 166960K 13323 0 pcb 19 16K 18K 166960K 257 0 rtable 235 10K 10K 166960K 584 0 pf 40 18K 81K 166960K 139 0 ifaddr 43 7K 8K 166960K 118 0 ifgroup 67 2K 3K 166960K 200 0 sysctl 4 1K 9K 166960K 13 0 counters 74 37K 38K 166960K 204 0 ioctlops 0 0K 4K 166960K 1769 0 iov 0 0K 28K 166960K 61 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1404 88K 89K 166960K 2212 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 926K 166960K 22 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 53 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 1217 0 sigio 0 0K 0K 166960K 16 0 proc 75 131K 164K 166960K 711 0 subproc 72 4K 4K 166960K 92 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 221 0 in_multi 88 6K 7K 166960K 187 0 ether_multi 1 0K 0K 166960K 9 0 mrt 1 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 127 572K 572K 166960K 127 0 exec 0 0K 1K 166960K 587 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 244 175K 189K 166960K 13069 0 UVM aobj 65 78K 78K 166960K 99 0 pinsyscall 42 84K 102K 166960K 2411 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 2K 166960K 114 0 NDP 14 0K 1K 166960K 74 0 temp 69 8678K 8744K 166960K 60243 0 kqueue 13 20K 28K 166960K 231 0 SYN cache 2 8K 16K 166960K 3 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 120 114 0 111 1 0 1 1 0 8 0 rtentry 176 170 0 76 6 0 6 6 0 8 0 unpcb 144 920 0 903 7 6 1 6 0 8 0 syncache 336 9 0 9 4 4 0 1 0 8 0 tcpqe 32 3 0 3 2 2 0 1 0 8 0 tcpcb 736 481 0 475 11 8 3 7 0 8 2 arp 136 24 0 7 1 0 1 1 0 8 0 inpcb 328 1701 0 1690 20 11 9 9 0 8 8 nd6 152 32 0 9 1 0 1 1 0 8 0 pkpcb 40 7 0 7 4 3 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 46 0 46 3 2 1 1 0 8 1 pppxif 1504 10 0 10 3 3 0 1 0 8 0 pffrag 232 10 0 6 1 0 1 1 0 482 0 pffrnode 88 8 0 5 1 0 1 1 0 8 0 pffrent 40 23 0 19 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 2 0 2 2 2 0 1 0 8 0 rttmr 136 4 0 4 3 3 0 1 0 8 0 art_heap8 4096 4 0 0 4 0 4 4 0 8 0 art_heap4 256 728 0 337 31 5 26 30 0 8 0 art_table 40 732 0 337 5 0 5 5 0 8 0 art_node 32 168 0 85 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 50 0 40 1 0 1 1 0 8 0 shmpl 112 25 0 1 1 0 1 1 0 8 0 dirhash 1024 27 0 10 3 0 3 3 0 8 0 dino2pl 256 3604 0 2096 96 0 96 96 0 8 0 ffsino 296 3604 0 2096 117 0 117 117 0 8 0 nchpl 144 5373 0 4817 64 34 30 64 0 8 6 rtmask 32 10 0 10 4 4 0 1 0 8 0 vnodes 216 4141 0 0 231 0 231 231 0 8 0 namei 1024 17933 0 17933 2 1 1 1 0 8 1 percpumem 16 117 0 65 1 0 1 1 0 8 0 vcpupl 3968 38 0 0 5 0 5 5 0 8 0 vmpool 848 71 0 33 5 0 5 5 0 8 0 kstatmem 264 110 0 78 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 6 0 6 4 4 0 1 0 8 0 scxspl 216 49810 0 49809 13 11 2 8 1 8 1 plimitpl 152 297 0 278 1 0 1 1 0 8 0 sigapl 424 1547 0 1499 9 2 7 8 0 8 1 knotepl 120 655 0 0 20 1 19 20 0 8 0 kqueuepl 224 481 0 472 7 6 1 5 0 8 0 pipepl 344 290 0 263 9 6 3 6 0 8 0 fdescpl 528 1509 0 1478 3 0 3 3 0 8 0 filepl 160 9385 0 9163 22 8 14 15 0 8 3 lockfpl 104 345 0 342 1 0 1 1 0 8 0 lockfspl 48 140 0 137 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 53 0 36 1 0 1 1 0 8 0 ucredpl 104 1297 0 1283 1 0 1 1 0 8 0 zombiepl 144 1784 0 1781 2 1 1 1 0 8 0 processpl 1232 1547 0 1499 6 0 6 6 0 8 0 procpl 664 3259 0 3206 7 1 6 7 0 8 0 sosppl 176 14 0 14 3 3 0 1 0 8 0 sockpl 752 2767 0 2736 37 25 12 17 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 117 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 1 mtagpl 96 37 0 0 1 0 1 1 0 8 0 mbufpl 256 1202 0 0 73 0 73 73 0 8 0 bufpl 280 21385 0 15249 439 0 439 439 0 8 0 anonpl 32 11326 0 0 92 1 91 91 0 246 0 amapchunkpl 152 43630 0 43157 39 12 27 28 0 158 5 amappl16 200 8158 0 8109 71 44 27 27 0 8 17 amappl15 192 10 0 10 1 1 0 1 0 8 0 amappl14 184 4 0 4 1 1 0 1 0 8 0 amappl13 176 480 0 479 1 0 1 1 0 8 0 amappl12 168 1890 0 1848 3 0 3 3 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 66 0 52 1 0 1 1 0 8 0 amappl9 144 275 0 274 2 1 1 1 0 8 0 amappl8 136 58 0 55 1 0 1 1 0 8 0 amappl7 128 89 0 87 1 0 1 1 0 8 0 amappl6 120 307 0 293 1 0 1 1 0 8 0 amappl5 112 77 0 66 1 0 1 1 0 8 0 amappl4 104 441 0 410 1 0 1 1 0 8 0 amappl3 96 7559 0 7472 3 0 3 3 0 8 0 amappl2 88 1636 0 1557 2 0 2 2 0 8 0 amappl1 80 14493 0 13900 15 1 14 14 0 8 0 amappl 88 12094 0 11930 5 0 5 5 0 92 0 uvmvnodes 80 152 0 0 4 0 4 4 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 128 256 0 256 4 4 0 1 0 8 0 dma64 64 7 0 7 2 2 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 98 0 34 2 0 2 2 0 8 0 uaddrrnd 24 1509 0 1478 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1509 0 1478 1 0 1 1 0 8 0 vmmpekpl 168 13036 0 12987 3 0 3 3 0 8 0 vmmpepl 168 104366 0 102429 139 30 109 109 0 357 7 vmsppl 488 1508 0 1478 7 2 5 5 0 8 0 rwobjpl 80 31815 0 30661 42 7 35 35 0 8 4 pdppl 4096 3168 0 3060 151 41 110 111 0 8 2 pvpl 32 17754 0 0 144 1 143 143 0 265 0 pmappl 256 1579 0 1511 5 0 5 5 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 408 0 62 10 0 10 10 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83866ff0) 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(ffffffff838cf600) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838cf600) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a234b30,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 msleep_nsec(ffffffff8381c728,ffffffff8381c6f0,4,ffffffff833c0d2e,ffffffffffffffff) at msleep_nsec+0x1a0 sys/kern/kern_synch.c:202 reaper(ffff8000ffffd760) at reaper+0x15b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff83866ff0) 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(ffffffff838cf600) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838cf600) at __mp_lock+0x192 sys/kern/kern_lock.c:173 intr_handler(ffff80002a234b30,ffff8000002a3480) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0xf sys/dev/kcov.c:153 msleep_nsec(ffffffff8381c728,ffffffff8381c6f0,4,ffffffff833c0d2e,ffffffffffffffff) at msleep_nsec+0x1a0 sys/kern/kern_synch.c:202 reaper(ffff8000ffffd760) at reaper+0x15b sys/kern/kern_exit.c:477 end trace frame: 0x0, count: -9 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: 0x7efeaa118f40, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x7efeaa118f40, count: -1