This is a note to let you know that I've just added the patch titled
powerpc/xive: Add missing null check after calling kmalloc
to the 5.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-xive-add-missing-null-check-after-calling-km.patch
and it can be found in the queue-5.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 291a21c3f7985d30778e09976099a6adb28b771d
Author: Ammar Faizi <ammarfaizi2@xxxxxxxxx>
Date: Sun Dec 26 20:54:02 2021 +0700
powerpc/xive: Add missing null check after calling kmalloc
[ 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@xxxxxxxxx>
Reviewed-by: Cédric Le Goater <clg@xxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211226135314.251221-1-ammar.faizi@xxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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);
