A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 03:27:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

orangefs: handle zero size write in debugfs

Browse source 
If we write zero bytes to this debugfs file, then it will cause an
underflow when we do copy_from_user(buf, ubuf, count - 1).  Debugfs can
normally only be written to by root so the impact of this is low.

Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: Mike Marshall <[email protected]>
This commit is contained in:
Dan Carpenter 2017-04-14 22:11:53 +03:00 • committed by Mike Marshall
commit 907bfcd8d8
1 changed files with 3 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

3
fs/orangefs/orangefs-debugfs.c
View file

@ -440,6 +440,9 @@ static ssize_t orangefs_debug_write(struct file *file,
"orangefs_debug_write: %pD\n",
file);
if (count == 0)
return 0;
/*
* Thwart users who try to jamb a ridiculous number
* of bytes into the debug file...