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| author | Nathan Chancellor <nathan@kernel.org> | 2025-07-16 01:56:05 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-24 09:51:49 +0300 |
| commit | cdbca8720882d3eb5e2bbcde96b97df440bc7136 (patch) | |
| tree | 98d1d1157c4b8fed6b1f8615d7d0a3ba05387190 /drivers/memstick/core | |
| parent | 636084f785e279b10c449a6eace70c64b73d2a96 (diff) | |
| download | linux-cdbca8720882d3eb5e2bbcde96b97df440bc7136.tar.xz | |
memstick: core: Zero initialize id_reg in h_memstick_read_dev_id()
commit 21b34a3a204ed616373a12ec17dc127ebe51eab3 upstream.
A new warning in clang [1] points out that id_reg is uninitialized then
passed to memstick_init_req() as a const pointer:
drivers/memstick/core/memstick.c:330:59: error: variable 'id_reg' is uninitialized when passed as a const pointer argument here [-Werror,-Wuninitialized-const-pointer]
330 | memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, &id_reg,
| ^~~~~~
Commit de182cc8e882 ("drivers/memstick/core/memstick.c: avoid -Wnonnull
warning") intentionally passed this variable uninitialized to avoid an
-Wnonnull warning from a NULL value that was previously there because
id_reg is never read from the call to memstick_init_req() in
h_memstick_read_dev_id(). Just zero initialize id_reg to avoid the
warning, which is likely happening in the majority of builds using
modern compilers that support '-ftrivial-auto-var-init=zero'.
Cc: stable@vger.kernel.org
Fixes: de182cc8e882 ("drivers/memstick/core/memstick.c: avoid -Wnonnull warning")
Link: https://github.com/llvm/llvm-project/commit/00dacf8c22f065cb52efb14cd091d441f19b319e [1]
Closes: https://github.com/ClangBuiltLinux/linux/issues/2105
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250715-memstick-fix-uninit-const-pointer-v1-1-f6753829c27a@kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/memstick/core')
| -rw-r--r-- | drivers/memstick/core/memstick.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/memstick/core/memstick.c b/drivers/memstick/core/memstick.c index d410e2e78a3d..4b62ebfdb9b0 100644 --- a/drivers/memstick/core/memstick.c +++ b/drivers/memstick/core/memstick.c @@ -323,7 +323,7 @@ EXPORT_SYMBOL(memstick_init_req); static int h_memstick_read_dev_id(struct memstick_dev *card, struct memstick_request **mrq) { - struct ms_id_register id_reg; + struct ms_id_register id_reg = {}; if (!(*mrq)) { memstick_init_req(&card->current_mrq, MS_TPC_READ_REG, &id_reg, |