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| author | Griffin Kroah-Hartman <griffin@kroah.com> | 2024-08-15 12:49:20 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-08-15 17:59:14 +0300 |
| commit | 9bb5e74b2bf88fbb024bb15ded3b011e02c673be (patch) | |
| tree | 2cb591d45aba467d850a7554c1aae5294680400c /drivers/misc | |
| parent | ccbde4b128ef9c73d14d0d7817d68ef795f6d131 (diff) | |
| download | linux-9bb5e74b2bf88fbb024bb15ded3b011e02c673be.tar.xz | |
Revert "misc: fastrpc: Restrict untrusted app to attach to privileged PD"
This reverts commit bab2f5e8fd5d2f759db26b78d9db57412888f187.
Joel reported that this commit breaks userspace and stops sensors in
SDM845 from working. Also breaks other qcom SoC devices running postmarketOS.
Cc: stable <stable@kernel.org>
Cc: Ekansh Gupta <quic_ekangupt@quicinc.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reported-by: Joel Selvaraj <joelselvaraj.oss@gmail.com>
Link: https://lore.kernel.org/r/9a9f5646-a554-4b65-8122-d212bb665c81@umsystem.edu
Signed-off-by: Griffin Kroah-Hartman <griffin@kroah.com>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Fixes: bab2f5e8fd5d ("misc: fastrpc: Restrict untrusted app to attach to privileged PD")
Link: https://lore.kernel.org/r/20240815094920.8242-1-griffin@kroah.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/fastrpc.c | 22 |
1 files changed, 3 insertions, 19 deletions
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 5204fda51da3..339d126414d4 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -2085,16 +2085,6 @@ err_invoke: return err; } -static int is_attach_rejected(struct fastrpc_user *fl) -{ - /* Check if the device node is non-secure */ - if (!fl->is_secure_dev) { - dev_dbg(&fl->cctx->rpdev->dev, "untrusted app trying to attach to privileged DSP PD\n"); - return -EACCES; - } - return 0; -} - static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -2107,19 +2097,13 @@ static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, err = fastrpc_invoke(fl, argp); break; case FASTRPC_IOCTL_INIT_ATTACH: - err = is_attach_rejected(fl); - if (!err) - err = fastrpc_init_attach(fl, ROOT_PD); + err = fastrpc_init_attach(fl, ROOT_PD); break; case FASTRPC_IOCTL_INIT_ATTACH_SNS: - err = is_attach_rejected(fl); - if (!err) - err = fastrpc_init_attach(fl, SENSORS_PD); + err = fastrpc_init_attach(fl, SENSORS_PD); break; case FASTRPC_IOCTL_INIT_CREATE_STATIC: - err = is_attach_rejected(fl); - if (!err) - err = fastrpc_init_create_static_process(fl, argp); + err = fastrpc_init_create_static_process(fl, argp); break; case FASTRPC_IOCTL_INIT_CREATE: err = fastrpc_init_create_process(fl, argp); |