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From: "René Scharfe" <l.s.r@web.de>
To: Git List <git@vger.kernel.org>
Cc: "Junio C Hamano" <gitster@pobox.com>, "Jeff King" <peff@peff.net>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: [PATCH] tree-walk: disallow overflowing modes
Date: Sat, 21 Jan 2023 10:36:09 +0100	[thread overview]
Message-ID: <d673fde7-7eb2-6306-86b6-1c1a4c988ee8@web.de> (raw)

When parsing tree entries, reject mode values that don't fit into an
unsigned int.

Signed-off-by: René Scharfe <l.s.r@web.de>
---
 tree-walk.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tree-walk.c b/tree-walk.c
index 74f4d710e8..5e7bc38600 100644
--- a/tree-walk.c
+++ b/tree-walk.c
@@ -17,6 +17,8 @@ static const char *get_mode(const char *str, unsigned int *modep)
 	while ((c = *str++) != ' ') {
 		if (c < '0' || c > '7')
 			return NULL;
+		if ((mode << 3) >> 3 != mode)
+			return NULL;
 		mode = (mode << 3) + (c - '0');
 	}
 	*modep = mode;
--
2.39.1

             reply	other threads:[~2023-01-21  9:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-21  9:36 René Scharfe [this message]
2023-01-22  7:50 ` [PATCH] tree-walk: disallow overflowing modes Jeff King
2023-01-22 10:03   ` René Scharfe
2023-01-22 16:36     ` Junio C Hamano
2023-01-22 22:02     ` Jeff King
2023-01-23  8:33 ` Ævar Arnfjörð Bjarmason
2023-01-24 18:53   ` René Scharfe
2023-01-24 20:44     ` Junio C Hamano
2023-01-26 11:36       ` Jeff King

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