diff options
Diffstat (limited to 'drivers/misc/fastrpc.c')
| -rw-r--r-- | drivers/misc/fastrpc.c | 47 |
1 files changed, 34 insertions, 13 deletions
diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index dbd26c3b24..a7a2bcedb3 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -1238,6 +1238,7 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl, struct fastrpc_phy_page pages[1]; char *name; int err; + bool scm_done = false; struct { int pgid; u32 namelen; @@ -1289,6 +1290,7 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl, fl->cctx->remote_heap->phys, fl->cctx->remote_heap->size, err); goto err_map; } + scm_done = true; } } @@ -1320,10 +1322,11 @@ static int fastrpc_init_create_static_process(struct fastrpc_user *fl, goto err_invoke; kfree(args); + kfree(name); return 0; err_invoke: - if (fl->cctx->vmcount) { + if (fl->cctx->vmcount && scm_done) { u64 src_perms = 0; struct qcom_scm_vmperm dst_perms; u32 i; @@ -1693,16 +1696,20 @@ static int fastrpc_get_info_from_dsp(struct fastrpc_user *fl, uint32_t *dsp_attr { struct fastrpc_invoke_args args[2] = { 0 }; - /* Capability filled in userspace */ + /* + * Capability filled in userspace. This carries the information + * about the remoteproc support which is fetched from the remoteproc + * sysfs node by userspace. + */ dsp_attr_buf[0] = 0; + dsp_attr_buf_len -= 1; args[0].ptr = (u64)(uintptr_t)&dsp_attr_buf_len; args[0].length = sizeof(dsp_attr_buf_len); args[0].fd = -1; args[1].ptr = (u64)(uintptr_t)&dsp_attr_buf[1]; - args[1].length = dsp_attr_buf_len; + args[1].length = dsp_attr_buf_len * sizeof(u32); args[1].fd = -1; - fl->pd = USER_PD; return fastrpc_internal_invoke(fl, true, FASTRPC_DSP_UTILITIES_HANDLE, FASTRPC_SCALARS(0, 1, 1), args); @@ -1730,7 +1737,7 @@ static int fastrpc_get_info_from_kernel(struct fastrpc_ioctl_capability *cap, if (!dsp_attributes) return -ENOMEM; - err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES_LEN); + err = fastrpc_get_info_from_dsp(fl, dsp_attributes, FASTRPC_MAX_DSP_ATTRIBUTES); if (err == DSP_UNSUPPORTED_API) { dev_info(&cctx->rpdev->dev, "Warning: DSP capabilities not supported on domain: %d\n", domain); @@ -1783,7 +1790,7 @@ static int fastrpc_get_dsp_info(struct fastrpc_user *fl, char __user *argp) if (err) return err; - if (copy_to_user(argp, &cap.capability, sizeof(cap.capability))) + if (copy_to_user(argp, &cap, sizeof(cap))) return -EFAULT; return 0; @@ -2080,6 +2087,16 @@ 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) { @@ -2092,13 +2109,19 @@ static long fastrpc_device_ioctl(struct file *file, unsigned int cmd, err = fastrpc_invoke(fl, argp); break; case FASTRPC_IOCTL_INIT_ATTACH: - err = fastrpc_init_attach(fl, ROOT_PD); + err = is_attach_rejected(fl); + if (!err) + err = fastrpc_init_attach(fl, ROOT_PD); break; case FASTRPC_IOCTL_INIT_ATTACH_SNS: - err = fastrpc_init_attach(fl, SENSORS_PD); + err = is_attach_rejected(fl); + if (!err) + err = fastrpc_init_attach(fl, SENSORS_PD); break; case FASTRPC_IOCTL_INIT_CREATE_STATIC: - err = fastrpc_init_create_static_process(fl, argp); + err = is_attach_rejected(fl); + if (!err) + err = fastrpc_init_create_static_process(fl, argp); break; case FASTRPC_IOCTL_INIT_CREATE: err = fastrpc_init_create_process(fl, argp); @@ -2186,7 +2209,7 @@ static int fastrpc_cb_probe(struct platform_device *pdev) return 0; } -static int fastrpc_cb_remove(struct platform_device *pdev) +static void fastrpc_cb_remove(struct platform_device *pdev) { struct fastrpc_channel_ctx *cctx = dev_get_drvdata(pdev->dev.parent); struct fastrpc_session_ctx *sess = dev_get_drvdata(&pdev->dev); @@ -2201,8 +2224,6 @@ static int fastrpc_cb_remove(struct platform_device *pdev) } } spin_unlock_irqrestore(&cctx->lock, flags); - - return 0; } static const struct of_device_id fastrpc_match_table[] = { @@ -2212,7 +2233,7 @@ static const struct of_device_id fastrpc_match_table[] = { static struct platform_driver fastrpc_cb_driver = { .probe = fastrpc_cb_probe, - .remove = fastrpc_cb_remove, + .remove_new = fastrpc_cb_remove, .driver = { .name = "qcom,fastrpc-cb", .of_match_table = fastrpc_match_table, |