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| author | Thorsten Blum <thorsten.blum@toblux.com> | 2024-07-05 08:58:55 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-07-05 10:01:42 +0200 |
| commit | f0f53369af368b7ffc8a12bff508d7c958cce8b2 (patch) | |
| tree | 1fe06f860bbeec27c0ed77b786aee0e7dc1697e4 /drivers/misc | |
| parent | 9d7eb234ac7a56b88aea8a52ed81553a730fe25c (diff) | |
| download | linux-stable-f0f53369af368b7ffc8a12bff508d7c958cce8b2.tar.gz linux-stable-f0f53369af368b7ffc8a12bff508d7c958cce8b2.tar.bz2 linux-stable-f0f53369af368b7ffc8a12bff508d7c958cce8b2.zip | |
misc: fastrpc: Use memdup_user()
Switching to memdup_user() overwrites the allocated memory only once,
whereas kzalloc() followed by copy_from_user() initializes the allocated
memory to zero and then immediately overwrites it.
Fixes the following Coccinelle/coccicheck warning reported by
memdup_user.cocci:
WARNING opportunity for memdup_user
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20240705075900.424100-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/fastrpc.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 4c67e2c5a82e..694fc083b1bd 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -1259,17 +1259,12 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl, goto err; } - name = kzalloc(init.namelen, GFP_KERNEL); - if (!name) { - err = -ENOMEM; + name = memdup_user(u64_to_user_ptr(init.name), init.namelen); + if (IS_ERR(name)) { + err = PTR_ERR(name); goto err; } - if (copy_from_user(name, (void __user *)(uintptr_t)init.name, init.namelen)) { - err = -EFAULT; - goto err_name; - } - if (!fl->cctx->remote_heap) { err = fastrpc_remote_heap_alloc(fl, fl->sctx->dev, init.memlen, &fl->cctx->remote_heap); |