[FS#96] segfault in kmodloader (ubox)

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Artox (Artox) 

Attached to Project - LEDE Project
Summary - segfault in kmodloader (ubox)
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Critical
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - kmodloader.c:131
null pointer dereference in for (p = module_folders; *p; p++) {
                                                     ^^

root@(none):/# gdb --args insmod ext4
GNU gdb (GDB) 7.11.1
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Reading symbols from insmod...done.
(gdb) run
Starting program: /usr/sbin/insmod ext4
warning: Unable to find libthread_db matching inferior's thread library, thread debugging will not be available.

Program received signal SIGSEGV, Segmentation fault.
0x00011a48 in get_module_path (name=0xbeffff64 "ext4")
    at /opt/workspace/SolidRun/OpenWRT/lede-project/build_dir/target-arm_cortex-a9+neon_glibc-2.22_eabi/ubox-2016-07-19/kmodloader.c:131
131     /opt/workspace/SolidRun/OpenWRT/lede-project/build_dir/target-arm_cortex-a9+neon_glibc-2.22_eabi/ubox-2016-07-19/kmodloader.c: No such file or directory.
(gdb) bt
#0  0x00011a48 in get_module_path (name=0xbeffff64 "ext4")
    at /opt/workspace/SolidRun/OpenWRT/lede-project/build_dir/target-arm_cortex-a9+neon_glibc-2.22_eabi/ubox-2016-07-19/kmodloader.c:131
#1  0x00010e18 in main_insmod (argv=0xbefffe64, argc=2)
    at /opt/workspace/SolidRun/OpenWRT/lede-project/build_dir/target-arm_cortex-a9+neon_glibc-2.22_eabi/ubox-2016-07-19/kmodloader.c:614
#2  main (argc=2, argv=0xbefffe64)
    at /opt/workspace/SolidRun/OpenWRT/lede-project/build_dir/target-arm_cortex-a9+neon_glibc-2.22_eabi/ubox-2016-07-19/kmodloader.c:863
(gdb) info locals
p = 0x0
path = '\000' 
s = {st_dev = 8029399166113284096, __pad1 = 25966, st_ino = 0, st_mode = 0, 
  st_nlink = 0, st_uid = 0, st_gid = 0, st_rdev = 0, __pad2 = 0, st_size = 0, 
  st_blksize = 0, st_blocks = 0, st_atim = {tv_sec = 0, tv_nsec = 0}, 
  st_mtim = {tv_sec = 0, tv_nsec = -1224802304}, st_ctim = {tv_sec = 0, 
    tv_nsec = 2}, __glibc_reserved4 = 3204447844, __glibc_reserved5 = 143404}
(gdb) print module_folders
$2 = (char **) 0x0

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=96