On Sat, Oct 28, 2023 at 02:47:47PM +0800, Baokun Li wrote: > commit 43bbddc067883d94de7a43d5756a295439fbe37d upstream. Why just 5.15 and older? What about 6.1.y? We can't take patches only for older stable kernels, otherwise you will have a regression when you upgrade. Please send a series for 6.1.y if you wish to have us apply these for older kernels. > When we use lstart + len to calculate the end of free extent or prealloc > space, it may exceed the maximum value of 4294967295(0xffffffff) supported > by ext4_lblk_t and cause overflow, which may lead to various problems. > > Therefore, we add two helper functions, extent_logical_end() and > pa_logical_end(), to limit the type of end to loff_t, and also convert > lstart to loff_t for calculation to avoid overflow. > > Signed-off-by: Baokun Li <libaokun1@xxxxxxxxxx> > Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx> > Link: https://lore.kernel.org/r/20230724121059.11834-2-libaokun1@xxxxxxxxxx > Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> > > Conflicts: > fs/ext4/mballoc.c > Note, the "Conflicts:" stuff isn't needed. thanks, greg k-h
