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eeprom: fix memory leak on buf when failed allocation of csraddr_str

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The error return path When csraddr_str fails to free buf, causing a
memory leak. Fix this by returning via the free_buf label that
performs the necessary cleanup.

Signed-off-by: Colin Ian King <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Colin Ian King 2017-01-24 14:38:38 +00:00 • committed by Greg Kroah-Hartman
commit acf50ec773
1 changed files with 4 additions and 2 deletions
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6
drivers/misc/eeprom/idt_89hpesx.c
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@ -965,8 +965,10 @@ static ssize_t idt_dbgfs_csr_write(struct file *filep, const char __user *ubuf,
csraddr_len = colon_ch - buf;
csraddr_str =
kmalloc(sizeof(char)*(csraddr_len + 1), GFP_KERNEL);
if (csraddr_str == NULL)
return -ENOMEM;
if (csraddr_str == NULL) {
ret = -ENOMEM;
goto free_buf;
}
/* Copy the register address to the substring buffer */
strncpy(csraddr_str, buf, csraddr_len);
csraddr_str[csraddr_len] = '\0';