3 Commits

Author SHA1 Message Date
Bjorn Andersson
a83406f21b sparse: Handle larger FILL and DONT_CARE chunks
The unsparsed chunk size is expressed in units of blk_sz. For RAW chunks
this is then limited to (just under) 32-bits due to the total_sz
(sparsed chunk size), but FILL and DONT_CARE can be much bigger.

But doing the size calculation on the 32-bit integers overflows and any
upper bits are lost, and the unsparsed result is wrong. So, switch this
to 64-bit instead.

It's unclear what happens if we pass a larger num_sectors to the
programmer, so this limitation is left, and checked for.

Fixes: 02c008adfd ("add support sparse attribute")
Signed-off-by: Bjorn Andersson <bjorn.andersson@oss.qualcomm.com>
2025-08-28 10:42:08 -05:00
Bjorn Andersson
739b1ad4db sparse: Handle larger-than-32bit sparse images
When the sparse image parser finds a RAW chunk, it queries the current
file offset in the sparse image and store this for the programming
phase. But the offset is stored in a 32-bit unsigned int, so when the
sparse image passes 4GB the program entries start to refer to the wrong
data.

Split the fill_value and offset into dedicated fields and give them both
their specific type, to avoid any confusion related to the size of these
data types.

Fixes: 02c008adfd ("add support sparse attribute")
Signed-off-by: Bjorn Andersson <bjorn.andersson@oss.qualcomm.com>
2025-08-28 10:42:08 -05:00
Maxim Paymushkin
02c008adfd add support sparse attribute
Signed-off-by: Maxim Paymushkin <maxim.paymushkin.development@gmail.com>
2025-06-26 13:19:21 +02:00