Kunwu Chan <chen...@kylinos.cn> writes: > kasprintf() returns a pointer to dynamically allocated memory > which can be NULL upon failure. Ensure the allocation was successful > by checking the pointer validity. > > Suggested-by: Christophe Leroy <christophe.le...@csgroup.eu> > Suggested-by: Michael Ellerman <m...@ellerman.id.au> > Signed-off-by: Kunwu Chan <chen...@kylinos.cn> > --- > v2: Use "panic" instead of "return" > --- > arch/powerpc/mm/init-common.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c > index 119ef491f797..9788950b33f5 100644 > --- a/arch/powerpc/mm/init-common.c > +++ b/arch/powerpc/mm/init-common.c > @@ -139,6 +139,8 @@ void pgtable_cache_add(unsigned int shift) > > align = max_t(unsigned long, align, minalign); > name = kasprintf(GFP_KERNEL, "pgtable-2^%d", shift); > + if (!name) > + panic("Failed to allocate memory for order %d", shift); > new = kmem_cache_create(name, table_size, align, 0, ctor(shift)); > if (!new) > panic("Could not allocate pgtable cache for order %d", shift);
It would be nice to avoid two calls to panic. Can you reorganise the logic so that there's only one? Initialising new to NULL might help. cheers