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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/mtd/nand/bbt.c
..
..
@@ -116,7 +116,10 @@
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 	if (entry >= nanddev_neraseblocks(nand))
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 		return -ERANGE;
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-	pos[0] &= ~GENMASK(offs + bits_per_block - 1, offs);
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+	if (bits_per_block + offs > BITS_PER_LONG)
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+		pos[0] &= ~GENMASK(BITS_PER_LONG - 1, offs);
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+	else
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+		pos[0] &= ~GENMASK(offs + bits_per_block - 1, offs);
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 	pos[0] |= val << offs;
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 	if (bits_per_block + offs > BITS_PER_LONG) {