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(parent: 688d62b) | patch
fs: fat: avoid multiplication overflow
authorHeinrich Schuchardt <heinrich.schuchardt@canonical.com>
Sun, 30 Jul 2023 14:44:04 +0000 (16:44 +0200)
committerTom Rini <trini@konsulko.com>
Mon, 14 Aug 2023 21:55:53 +0000 (17:55 -0400)
commit84032b6759024337a81ae5d8e23a39110381743b
tree53774a876d57ec8557ca4c6afd9f4b8798fca186tree | snapshot
parent688d62bfc8e336b06b5d6c445333dc04f1283d8dcommit | diff
fs: fat: avoid multiplication overflow

The product of two 32 bit integers is a 32 bit integer. Hence
clustcount * bytesperclust may overflow on > 4 GiB devices.

Change the type of clustcount.

Fixes: cb8af8af5ba0 ("fs: fat: support write with non-zero offset")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
fs/fat/fat_write.c diff | blob | history
My U-Boot fork