44 lines
1.3 KiB
Diff
44 lines
1.3 KiB
Diff
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From f24d89b76811f7b2bbfea787bb403358f960f097 Mon Sep 17 00:00:00 2001
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From: Peiyang Wang <wangpeiyang1@huawei.com>
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Date: Wed, 21 Aug 2024 10:30:09 +0800
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Subject: [PATCH 15/27] hikptool: nic: adding NUL at the end of the buffer
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length that is actually read.
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When pread is called, the return value may be smaller than the length that
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want to read, the position of adding NUL is too much and memory might be
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exposed. To avoid that case, to add NUL at the end of the buffer length
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that is actually read.
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Signed-off-by: Peiyang Wang <wangpeiyang1@huawei.com>
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---
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net/hikp_net_lib.c | 11 ++++++-----
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1 file changed, 6 insertions(+), 5 deletions(-)
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diff --git a/net/hikp_net_lib.c b/net/hikp_net_lib.c
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index 23adbdc..fbf03bd 100644
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--- a/net/hikp_net_lib.c
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+++ b/net/hikp_net_lib.c
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@@ -47,13 +47,14 @@ static int hikp_read_net_pci_info(const char *file_path, char *content, size_t l
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ret = pread(fd, content, len - 1, 0);
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if (ret < 0) {
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- close(fd);
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- return -EIO;
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+ ret = -errno;
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+ } else {
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+ content[ret] = '\0'; // The invoker ensures that the bounds are not crossed.
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+ ret = 0;
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}
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- content[len - 1] = '\0'; // The invoker ensures that the bounds are not crossed.
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- close(fd);
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- return 0;
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+ close(fd);
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+ return ret;
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}
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int hikp_net_creat_sock(void)
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--
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2.45.0.windows.1
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