From: Abdun Nihaal Date: Thu, 26 Jun 2025 17:28:21 +0000 (+0530) Subject: regmap: fix potential memory leak of regmap_bus X-Git-Tag: v6.1.148~248 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f6a7ab60b636970ed3689f720a34c70a3f6126a2;p=thirdparty%2Fkernel%2Fstable.git regmap: fix potential memory leak of regmap_bus [ 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 Link: https://patch.msgid.link/20250626172823.18725-1-abdun.nihaal@gmail.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index f0e314abcafc5..168532931c86d 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1266,6 +1266,8 @@ err_name: err_map: kfree(map); err: + if (bus && bus->free_on_exit) + kfree(bus); return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(__regmap_init);