eda47481b9
kpatch_process: fix possible double free. ptrace: fix NULL pointer access problem fix patched process crashing when acccess the global var fix probably restore cc symbol link fail when kill patch building uncourteous optimize: Remove unnecessary comparison code Signed-off-by: yezengruan <yezengruan@huawei.com> (cherry picked from commit f3d59711105eb667fa2f920958fcbdbb7068afd2)
39 lines
1.1 KiB
Diff
39 lines
1.1 KiB
Diff
From 037c9ac7e9d3eaa072ae1edaad2bc22e18f4333a Mon Sep 17 00:00:00 2001
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From: jiang-dawei15 <jiangdawei15@huawei.com>
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Date: Thu, 5 May 2022 10:39:47 +0800
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Subject: [PATCH] libcare-dump:change the return value
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---
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src/libcare-dump.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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diff --git a/src/libcare-dump.c b/src/libcare-dump.c
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index 8736452..b712709 100644
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--- a/src/libcare-dump.c
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+++ b/src/libcare-dump.c
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@@ -45,6 +45,7 @@ void usage()
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int kpatch_dump_kpatch_header(const char *input_file)
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{
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+ int rv;
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int fdi = -1;
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int ret = -1;
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int elf_size;
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@@ -67,7 +68,12 @@ int kpatch_dump_kpatch_header(const char *input_file)
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goto cleanup;
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}
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- ret = read(fdi, &kp, sizeof(struct kpatch_file));
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+ rv = read(fdi, &kp, sizeof(struct kpatch_file));
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+ if (rv <= 0) {
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+ printf("Read kpatch file '%s' failed.\n", input_file);
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+ goto cleanup;
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+ }
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+ ret = 0;
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printf("%-25s %s\n", "Patch Name:", input_file);
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printf("%-25s %s\n", "Magic:", kp.magic);
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printf("%-25s %s\n", "Patch id:", kp.id);
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--
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2.27.0
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