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powerpc/xive: Add missing null check after calling kmalloc

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[ Upstream commit 18dbfcdedc802f9500b2c29794f22a31d27639c0 ]

Commit 930914b7d5 ("powerpc/xive: Add a debugfs file to dump
internal XIVE state") forgot to add a null check.

Add it.

Fixes: 930914b7d5 ("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>
This commit is contained in:
Ammar Faizi 2021-12-26 20:54:02 +07:00 committed by Greg Kroah-Hartman
parent 588e0b81ce
commit 74988d017d
1 changed files with 3 additions and 0 deletions
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arch/powerpc/sysdev/xive/spapr.c
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@ -658,6 +658,9 @@ static int xive_spapr_debug_show(struct seq_file *m, void *private)
struct xive_irq_bitmap *xibm; struct xive_irq_bitmap *xibm;
char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL); char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
return -ENOMEM;
list_for_each_entry(xibm, &xive_irq_bitmaps, list) { list_for_each_entry(xibm, &xive_irq_bitmaps, list) {
memset(buf, 0, PAGE_SIZE); memset(buf, 0, PAGE_SIZE);
bitmap_print_to_pagebuf(true, buf, xibm->bitmap, xibm->count); bitmap_print_to_pagebuf(true, buf, xibm->bitmap, xibm->count);