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fs/squashfs: parameter check sqfs_read_metablock()

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We should check if the incoming parameter file_mapping is not NULL instead
of checking after adding an offset.

Reported-by: Coverity CID 307210
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Heinrich Schuchardt
2020-09-23 21:13:51 +02:00
committed by Tom Rini
parent 5558af16a0
commit 0ed375ebb1
1 changed files with 2 additions and 2 deletions
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4
fs/squashfs/sqfs_inode.c
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@@ -141,9 +141,9 @@ int sqfs_read_metablock(unsigned char *file_mapping, int offset,
const unsigned char *data;
u16 header;
data = file_mapping + offset;
if (!data)
if (!file_mapping)
return -EFAULT;
data = file_mapping + offset;
header = get_unaligned((u16 *)data);
if (!header)