From: Ammar Faizi ammarfaizi2@gmail.com
[ Upstream commit 18dbfcdedc802f9500b2c29794f22a31d27639c0 ]
Commit 930914b7d528fc ("powerpc/xive: Add a debugfs file to dump internal XIVE state") forgot to add a null check.
Add it.
Fixes: 930914b7d528fc6b0249bffc00564100bcf6ef75 ("powerpc/xive: Add a debugfs file to dump internal XIVE state") Signed-off-by: Ammar Faizi ammarfaizi2@gmail.com Reviewed-by: Cédric Le Goater clg@kaod.org Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/20211226135314.251221-1-ammar.faizi@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/sysdev/xive/spapr.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/sysdev/xive/spapr.c b/arch/powerpc/sysdev/xive/spapr.c index f143b6f111ac0..1179632560b8d 100644 --- a/arch/powerpc/sysdev/xive/spapr.c +++ b/arch/powerpc/sysdev/xive/spapr.c @@ -653,6 +653,9 @@ static int xive_spapr_debug_show(struct seq_file *m, void *private) struct xive_irq_bitmap *xibm; char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!buf) + return -ENOMEM; + list_for_each_entry(xibm, &xive_irq_bitmaps, list) { memset(buf, 0, PAGE_SIZE); bitmap_print_to_pagebuf(true, buf, xibm->bitmap, xibm->count);