Currently an ioctl_fibmap() caller may get a truncated and wrong block map address if the actual mapped physical block address is > INT_MAX. If that is the case then lets:- 1. Add a warning, 2. Returns 0 in the block mapped address, 3. And also return -ERANGE error. This is better than providing a wrong information to the user about the block mapping which in the worst case could cause a FS corruption (unknowingly by the caller since kernel didn't warn). Currently these checks are in place only for the filesystems who uses iomap based bmap interface. So let's do this right thing for all the fibmap() callers by adding this logic in ioctl_fibmap() directly. Patch-1 & Patch-2 commit msg may provide additional information. Ritesh Harjani (2): fibmap: Warn and return an error in case of block > INT_MAX iomap: bmap: Remove the WARN and return the proper block address fs/ioctl.c | 5 +++++ fs/iomap/fiemap.c | 5 +---- 2 files changed, 6 insertions(+), 4 deletions(-) -- 2.21.0
