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(parent: 2a60637) | patch
f2fs: fix potential overflow
authorChao Yu <yuchao0@huawei.com>
Thu, 7 Nov 2019 09:29:00 +0000 (17:29 +0800)
committerJaegeuk Kim <jaegeuk@kernel.org>
Thu, 7 Nov 2019 19:17:39 +0000 (11:17 -0800)
commit1f0d5c911b64165c9754139a26c8c2fad352c132
tree0df6533d246f5da2285b26353c0dd277f4493bddtree | snapshot
parent2a60637f06ac94869b2e630eaf837110d39bf291commit | diff
f2fs: fix potential overflow

We expect 64-bit calculation result from below statement, however
in 32-bit machine, looped left shift operation on pgoff_t type
variable may cause overflow issue, fix it by forcing type cast.

page->index << PAGE_SHIFT;

Fixes: 26de9b117130 ("f2fs: avoid unnecessary updating inode during fsync")
Fixes: 0a2aa8fbb969 ("f2fs: refactor __exchange_data_block for speed up")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
fs/f2fs/data.c diff | blob | history
fs/f2fs/file.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git