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Validate that the supplied file is not empty before trying mmap(2) it

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Submitted by:	Wojciech A. Koszek
PR:		bin/91411
MFC after:	1 week
This commit is contained in:
csjp 2006-01-15 20:30:13 +00:00
parent 4f56714639
commit 4c05286a61
1 changed files with 5 additions and 0 deletions
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5
lib/libkvm/kvm.c
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@ -179,6 +179,11 @@ _kvm_open(kd, uf, mf, flag, errout)
_kvm_syserr(kd, kd->program, "%s", mf);
goto failed;
}
if (S_ISREG(st.st_mode) && st.st_size <= 0) {
errno = EINVAL;
_kvm_syserr(kd, kd->program, "empty file");
goto failed;
}
if (fcntl(kd->pmfd, F_SETFD, FD_CLOEXEC) < 0) {
_kvm_syserr(kd, kd->program, "%s", mf);
goto failed;