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df2f845167
strrchr can potentially return a null so the following strlen on the null pointer can cause a null dereference. Add a check to see if the string postfix is not null before calling strlen. Detected by CoverityScan, CID#1452039 ("Dereference null return") Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>