CVS commit: src/lib/libc/gen

["Kamil Rytarowski" <kamil%netbsd.org@localhost>]

Module Name:    src
Committed By:   kamil
Date:           Thu Jul 26 00:05:28 UTC 2018

Modified Files:
        src/lib/libc/gen: ftok.c

Log Message:
Avoid undefined behavior in ftok(3)

Do not change the signedness bit with a left shift operation.
Cast to unsigned integer to prevent this.

ftok.c:56:10, left shift of 123456789 by 24 places cannot be represented in type 'int'
ftok.c:56:10, left shift of 4160 by 24 places cannot be represented in type 'int'

Detected with micro-UBSan in the user mode.


To generate a diff of this commit:
cvs rdiff -u -r1.11 -r1.12 src/lib/libc/gen/ftok.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.