bug fix: 32bit overflow of offset value in Raw Read and Raw Write #1
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syonbori wants to merge 2 commits intoduairc:masterfrom
Open
bug fix: 32bit overflow of offset value in Raw Read and Raw Write #1syonbori wants to merge 2 commits intoduairc:masterfrom
syonbori wants to merge 2 commits intoduairc:masterfrom
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hello duairc.
i found a bug related to offset overflow today. so i checked fuse_lib.c, and found it.
( requesting over 2,147,483,647, 2^32-1, causes offset value to be negative value. )
type of the argument, off_t offset, is valid, but converting the value into Ruby's value causes this overflow.
INT2NUM(offset) --> LONG2NUM(offset)
on my environment, Fedora12@x86-64 and CentOS5@i686 can make successfully.
fixing this, i confirmed to works fine like this:
dd if=fuse/image.dat of=/dev/null bs=1M count=256, skip=2047
(without this fix, requesting to 2048th block causes overflow. fusefs calls raw_read with negative offset.)
PS: sorry for adding some emptyline diffs in this request... i think this is caused by emacs, but i don't know why this happend and how to stop it :-(