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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-27 17:19:05 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-27 17:19:39 +0300 |
| commit | 4388f887b857de8576a8bf7fefc1202dc7dd10df (patch) | |
| tree | fc8bb6dbfeba17bdf78e79dcf444e3266ab0e2ef /drivers/base/firmware_loader | |
| parent | bd900901b8d1838bf1b6e63063e0025fca42d283 (diff) | |
| download | linux-4388f887b857de8576a8bf7fefc1202dc7dd10df.tar.xz | |
Revert "firmware_loader: use kernel credentials when reading firmware"
This reverts commit 3677563eb8731e1ad5970e3e57f74e5f9d63502a as it leaks
memory :(
Reported-by: Qian Cai <quic_qiancai@quicinc.com>
Link: https://lore.kernel.org/r/20220427135823.GD71@qian
Cc: Thiébaud Weksteen <tweek@google.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: John Stultz <jstultz@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/base/firmware_loader')
| -rw-r--r-- | drivers/base/firmware_loader/main.c | 16 |
1 files changed, 0 insertions, 16 deletions
diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c index 9a8579e56c26..921d955b7208 100644 --- a/drivers/base/firmware_loader/main.c +++ b/drivers/base/firmware_loader/main.c @@ -798,8 +798,6 @@ _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; @@ -816,18 +814,6 @@ _request_firmware(const struct firmware **firmware_p, const char *name, if (ret <= 0) /* error or already assigned */ goto out; - /* - * We are about to try to access the firmware file. Because we may have been - * 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(NULL); - if (!kern_cred) { - ret = -ENOMEM; - goto out; - } - old_cred = override_creds(kern_cred); - ret = fw_get_filesystem_firmware(device, fw->priv, "", NULL); /* Only full reads can support decompression, platform, and sysfs. */ @@ -858,8 +844,6 @@ _request_firmware(const struct firmware **firmware_p, const char *name, } else ret = assign_fw(fw, device); - revert_creds(old_cred); - out: if (ret < 0) { fw_abort_batch_reqs(fw); |