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[SCSI] esas2r: fix potential format string flaw 

This makes sure format strings cannot leak into the printk call via the
constructed buffer.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Bradley Grove <bgrove@attotech.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Kees Cook 2013-12-18 10:00:54 -08:00 committed by James Bottomley
parent 2e7063770e
commit b9c2446695
1 changed files with 2 additions and 6 deletions
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8
drivers/scsi/esas2r/esas2r_log.c
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@ -165,13 +165,9 @@ static int esas2r_log_master(const long level,
/*
* Put a line break at the end of the formatted string so that
* we don't wind up with run-on messages. only append if there
* is enough space in the buffer.
* we don't wind up with run-on messages.
*/
if (strlen(event_buffer) < buflen)
strcat(buffer, "\n");
printk(event_buffer);
printk("%s\n", event_buffer);
spin_unlock_irqrestore(&event_buffer_lock, flags);
}