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| author | Abdun Nihaal <abdun.nihaal@gmail.com> | 2025-06-26 22:58:21 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-01 09:48:40 +0100 |
| commit | 1b102d2cc4bc94de5a22161b780f83a46cd951b7 (patch) | |
| tree | ccf2b81e139e199b025f8305ae7339555fdc77c8 | |
| parent | be4f30f7c178d0197cae082ae5bd9f0a7fbe8272 (diff) | |
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 <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>
| -rw-r--r-- | drivers/base/regmap/regmap.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 5962ea1230a1..de4e2f3db942 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -1174,6 +1174,8 @@ err_name: err_map: kfree(map); err: + if (bus && bus->free_on_exit) + kfree(bus); return ERR_PTR(ret); } EXPORT_SYMBOL_GPL(__regmap_init); |