admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

firmware: don't copy kernel creds

Browse Source 
No need to copy kernel credentials.

Link: https://patch.msgid.link/20251103-work-creds-init_cred-v1-5-cb3ec8711a6a@kernel.org
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner
2025-11-03 00:12:44 +01:00
parent ae40e6c657
commit b9e3594e70
1 changed files with 25 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/base/firmware_loader/main.c
View File

@@ -829,8 +829,6 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
size_t offset, u32 opt_flags)
{
struct firmware *fw = NULL;
struct cred *kern_cred = NULL;
const struct cred *old_cred;
bool nondirect = false;
int ret;
@@ -871,13 +869,7 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
* called by a driver when serving an unrelated request from userland, we use
* the kernel credentials to read the file.
*/
kern_cred = prepare_kernel_cred(&init_task);
if (!kern_cred) {
ret = -ENOMEM;
goto out;
}
old_cred = override_creds(kern_cred);
scoped_with_kernel_creds() {
ret = fw_get_filesystem_firmware(device, fw->priv, "", NULL);
/* Only full reads can support decompression, platform, and sysfs. */
@@ -905,11 +897,10 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
if (nondirect)
ret = firmware_fallback_sysfs(fw, name, device,
opt_flags, ret);
} else
} else {
ret = assign_fw(fw, device);
revert_creds(old_cred);
put_cred(kern_cred);
}
}
out:
if (ret < 0) {