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powerpc/nvram: Fix a memory leak in err path

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If kmemdup fails, We need kfree *buff* first then return -ENOMEM.
Otherwise there is a memory leak.

Signed-off-by: Pan Xinhui <xinhui.pan@linux.vnet.ibm.com>
Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Pan Xinhui 2015-12-09 18:00:53 +08:00 committed by Michael Ellerman
parent 49d09bf2a6
commit 0d0fecc5b5
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/kernel/nvram_64.c
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@ -542,9 +542,9 @@ static ssize_t nvram_pstore_read(u64 *id, enum pstore_type_id *type,
time->tv_nsec = 0;
}
*buf = kmemdup(buff + hdr_size, length, GFP_KERNEL);
kfree(buff);
if (*buf == NULL)
return -ENOMEM;
kfree(buff);
*ecc_notice_size = 0;
if (err_type == ERR_TYPE_KERNEL_PANIC_GZ)