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d721a1752b
If subtracting 12 from l leaves zero we'd do a zero size allocation, leading to an oops later when we try to set the NUL terminator. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>