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Subject[PATCH] ubifs: fix a memory leak bug
Date
In ubifs_mount(), 'c' is allocated through kzalloc() in alloc_ubifs_info().
However, it is not deallocated in the following execution if
ubifs_fill_super() fails, leading to a memory leak bug. To fix this issue,
free 'c' before going to the 'out_deact' label.

Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
---
fs/ubifs/super.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 2c0803b..46e30e2 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2252,8 +2252,10 @@ static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
}
} else {
err = ubifs_fill_super(sb, data, flags & SB_SILENT ? 1 : 0);
- if (err)
+ if (err) {
+ kfree(c);
goto out_deact;
+ }
/* We do not support atime */
sb->s_flags |= SB_ACTIVE;
if (IS_ENABLED(CONFIG_UBIFS_ATIME_SUPPORT))
--
2.7.4
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