On 2023/10/31 20:51, Greg KH wrote:
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.
Since this series of patches for 5.15 also applies to 6.1.y, sorry for
not clarifying this.
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
OK!
--
With Best Regards,
Baokun Li
.
