TechPanelGM/kernel_xiaomi_sm8250
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

FROMLIST: fuse: 32-bit user space ioctl compat for fuse device

Browse Source 
With a 64-bit kernel build the FUSE device cannot handle ioctl requests
coming from 32-bit user space.
This is due to the ioctl command translation that generates different
command identifiers that thus cannot be used for direct comparisons
without proper manipulation.

Explicitly extract type and number from the ioctl command to enable
32-bit user space compatibility on 64-bit kernel builds.

Bug: 179164095
Link: https://lore.kernel.org/lkml/20210125153057.3623715-3-balsini@android.com/
Signed-off-by: Alessio Balsini <balsini@android.com>
Change-Id: I595517c54d551be70e83c7fcb4b62397a3615004
Signed-off-by: Alessio Balsini <balsini@google.com>
This commit is contained in:
Alessio Balsini
2021-01-25 17:01:30 +00:00
committed by Hridaya Prajapati
parent 8aca095696
commit 759f072297
2 changed files with 20 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/uapi/linux/fuse.h
View File

@@ -782,7 +782,8 @@ struct fuse_notify_retrieve_in {
};
/* Device ioctls: */
#define FUSE_DEV_IOC_CLONE _IOR(229, 0, uint32_t)
#define FUSE_DEV_IOC_MAGIC 229
#define FUSE_DEV_IOC_CLONE _IOR(FUSE_DEV_IOC_MAGIC, 0, uint32_t)
struct fuse_lseek_in {
uint64_t fh;