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Fix a logic bug in error handling code. It is an error if p == NULL.

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The linelen tests are only meaningful when p != NULL.

Reported by:	Coverity
Coverity CID:	1368655
MFC after:	1 month
This commit is contained in:
Don Lewis 2019-12-09 07:18:40 +00:00
parent 7887f00d2b
commit 1bf6738f80
1 changed files with 1 additions and 1 deletions
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2
sbin/swapon/swapon.c
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@ -542,7 +542,7 @@ swap_on_off_md(const char *name, char *mntops, int doingall)
goto err;
}
p = fgetln(sfd, &linelen);
if (p == NULL &&
if (p == NULL ||
(linelen < 2 || linelen > sizeof(linebuf))) {
warn("mdconfig (attach) unexpected output");
ret = NULL;