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9P: Cast to loff_t before multiplying
authorMatthew Wilcox (Oracle) <willy@infradead.org>
Sun, 4 Oct 2020 18:04:22 +0000 (19:04 +0100)
committerDominique Martinet <asmadeus@codewreck.org>
Wed, 7 Oct 2020 21:57:30 +0000 (23:57 +0200)
commitf5f7ab168b9a60e12a4b8f2bb6fcc91321dc23c1
tree4b45d50fabc82567e0d5aaadec5d085bca747841tree | snapshot
parent549738f15da0e5a00275977623be199fbbf7df50commit | diff
9P: Cast to loff_t before multiplying

On 32-bit systems, this multiplication will overflow for files larger
than 4GB.

Link: http://lkml.kernel.org/r/20201004180428.14494-2-willy@infradead.org
Cc: stable@vger.kernel.org
Fixes: fb89b45cdfdc ("9P: introduction of a new cache=mmap model.")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
fs/9p/vfs_file.c diff | blob | history
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