md-cluster: Fix potential error pointer dereference in resize_bitmaps()
[ Upstream commit5.4-rM2-2.2.x-imx-squashede8abe1de43
] The error handling calls md_bitmap_free(bitmap) which checks for NULL but will Oops if we pass an error pointer. Let's set "bitmap" to NULL on this error path. Fixes:afd7562860
("md-cluster/raid10: resize all the bitmaps before start reshape") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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3fcd24040f
commit
8645225c71
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@ -1139,6 +1139,7 @@ static int resize_bitmaps(struct mddev *mddev, sector_t newsize, sector_t oldsiz
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bitmap = get_bitmap_from_slot(mddev, i);
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if (IS_ERR(bitmap)) {
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pr_err("can't get bitmap from slot %d\n", i);
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bitmap = NULL;
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goto out;
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}
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counts = &bitmap->counts;
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