5.15-stable review patch. If anyone has any objections, please let me know.
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From: Abdun Nihaal abdun.nihaal@gmail.com
[ Upstream commit c871c199accb39d0f4cb941ad0dccabfc21e9214 ]
When __regmap_init() is called from __regmap_init_i2c() and __regmap_init_spi() (and their devm versions), the bus argument obtained from regmap_get_i2c_bus() and regmap_get_spi_bus(), may be allocated using kmemdup() to support quirks. In those cases, the bus->free_on_exit field is set to true.
However, inside __regmap_init(), buf is not freed on any error path. This could lead to a memory leak of regmap_bus when __regmap_init() fails. Fix that by freeing bus on error path when free_on_exit is set.
Fixes: ea030ca68819 ("regmap-i2c: Set regmap max raw r/w from quirks") Signed-off-by: Abdun Nihaal abdun.nihaal@gmail.com Link: https://patch.msgid.link/20250626172823.18725-1-abdun.nihaal@gmail.com Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/base/regmap/regmap.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 6d94ad8bf1eb7..ebddc69bc969c 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1264,6 +1264,8 @@ struct regmap *__regmap_init(struct device *dev, err_map: kfree(map); err: + if (bus && bus->free_on_exit) + kfree(bus); return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(__regmap_init);