Files
erofs-linux/tools/bootconfig
Ben Hutchings 729dc340a4 bootconfig: Fix negative seeks on 32-bit with LFS enabled
Commit 26dda57695 "tools/bootconfig: Cleanup bootconfig footer size
calculations" replaced some expressions of type int with the
BOOTCONFIG_FOOTER_SIZE macro, which expands to an expression of type
size_t, which is unsigned.

On 32-bit architectures with LFS enabled (i.e. off_t is 64-bit), the
seek offset of -BOOTCONFIG_FOOTER_SIZE now turns into a positive
value.

Fix this by casting the size to off_t before negating it.

Just in case someone changes BOOTCONFIG_MAGIC_LEN to have type size_t
later, do the same thing to the seek offset of -BOOTCONFIG_MAGIC_LEN.

Link: https://lore.kernel.org/all/[email protected]/

Fixes: 26dda57695 ("tools/bootconfig: Cleanup bootconfig footer size calculations")
Signed-off-by: Ben Hutchings <[email protected]>
Signed-off-by: Masami Hiramatsu (Google) <[email protected]>
2025-08-21 08:16:31 +09:00
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