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Message-ID: <87d4rb8j6l.fsf@rho.meyering.net> Date: Tue, 05 Feb 2008 17:25:06 +0100 From: Jim Meyering <jim@...ering.net> To: Jeff Dike <jdike@...toit.com>, linux-kernel Mailing List <linux-kernel@...r.kernel.org> Subject: [PATCH] uml: handle unusual results from find_tempdir. An alternative: make find_tempdir set tempdir to default_tempdir upon malloc failure. * arch/um/os-Linux/mem.c (make_tempfile): Handle NULL tempdir. Don't let a long tempdir (e.g., via TMPDIR) provoke heap corruption. Signed-off-by: Jim Meyering <meyering@...hat.com> --- arch/um/os-Linux/mem.c | 3 +++ 1 files changed, 3 insertions(+), 0 deletions(-) diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c index e114d09..1458385 100644 --- a/arch/um/os-Linux/mem.c +++ b/arch/um/os-Linux/mem.c @@ -176,6 +176,9 @@ int __init make_tempfile(const char *template, char **out_tempname, return -1; find_tempdir(); + if (tempdir == NULL || strlen(tempdir) >= MAXPATHLEN) + return -1; + if (template[0] != '/') strcpy(tempname, tempdir); else -- 1.5.4.19.gd3dfd -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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