linux-kernel - [PATCH 1/5] fs/ntfs3: Use kmalloc_array over kmalloc with multiply

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Date:   Tue, 31 Aug 2021 21:15:01 +0300
From:   Kari Argillander <kari.argillander@...il.com>
To:     Konstantin Komarov <almaz.alexandrovich@...agon-software.com>,
        ntfs3@...ts.linux.dev
Cc:     Kari Argillander <kari.argillander@...il.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] fs/ntfs3: Use kmalloc_array over kmalloc with multiply

If we do not use kmalloc_array we get checkpatch warning. It is also
little safer if something goes wrong with coding.

Signed-off-by: Kari Argillander <kari.argillander@...il.com>
---
 fs/ntfs3/bitmap.c | 2 +-
 fs/ntfs3/index.c  | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c
index 831501555009..aa0b1ea66cd0 100644
--- a/fs/ntfs3/bitmap.c
+++ b/fs/ntfs3/bitmap.c
@@ -1331,7 +1331,7 @@ int wnd_extend(struct wnd_bitmap *wnd, size_t new_bits)
 		new_last = wbits;
 
 	if (new_wnd != wnd->nwnd) {
-		new_free = kmalloc(new_wnd * sizeof(u16), GFP_NOFS);
+		new_free = kmalloc_array(new_wnd, sizeof(u16), GFP_NOFS);
 		if (!new_free)
 			return -ENOMEM;
 
diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
index 0daca9adc54c..7676a4a657d5 100644
--- a/fs/ntfs3/index.c
+++ b/fs/ntfs3/index.c
@@ -685,7 +685,7 @@ static struct NTFS_DE *hdr_find_e(const struct ntfs_index *indx,
 	if (end > 0x10000)
 		goto next;
 
-	offs = kmalloc(sizeof(u16) * nslots, GFP_NOFS);
+	offs = kmalloc_array(nslots, sizeof(u16), GFP_NOFS);
 	if (!offs)
 		goto next;
 
@@ -707,7 +707,7 @@ static struct NTFS_DE *hdr_find_e(const struct ntfs_index *indx,
 		u16 *ptr;
 		int new_slots = ALIGN(2 * nslots, 8);
 
-		ptr = kmalloc(sizeof(u16) * new_slots, GFP_NOFS);
+		ptr = kmalloc_array(new_slots, sizeof(u16), GFP_NOFS);
 		if (ptr)
 			memcpy(ptr, offs, sizeof(u16) * max_idx);
 		kfree(offs);
-- 
2.25.1