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63656f59ec
Return an ENOMEM error when the buffer is too small to perform the operation. Before: $ mdio mt7530-0 0x05:31 dump 0x0+512 Segmentation fault After: $ mdio mt7530-0 0x05:31 dump 0x0+512 ERROR: Dump operation failed (-12) Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
35 lines
945 B
Diff
35 lines
945 B
Diff
From d7e314e45c112198d15220333b869604478a2e49 Mon Sep 17 00:00:00 2001
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From: Aleksander Jan Bajkowski <olek2@wp.pl>
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Date: Sun, 28 Sep 2025 23:31:00 +0200
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Subject: [PATCH] mdio: fix segmentation fault in dump operation
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Return an ENOMEM error when the buffer is too small to
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perform the operation.
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Before:
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$ mdio mt7530-0 0x05:31 dump 0x0+512
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Segmentation fault
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After:
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$ mdio mt7530-0 0x05:31 dump 0x0+512
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ERROR: Dump operation failed (-12)
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Fixes: 882488711ca0 ("mdio: Add common dump operation to read ranges of registers")
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Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
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---
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src/mdio/mdio.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/src/mdio/mdio.c
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+++ b/src/mdio/mdio.c
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@@ -613,6 +613,9 @@ int mdio_xfer_timeout(const char *bus, s
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struct nlmsghdr *nlh;
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int err;
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+ if (prog->len * sizeof(*prog->insns) > len)
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+ return -ENOMEM;
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+
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nlh = msg_init(MDIO_GENL_XFER, NLM_F_REQUEST | NLM_F_ACK);
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if (!nlh)
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return -ENOMEM;
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