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authorRuan Jinjie <ruanjinjie@huawei.com>2023-07-27 11:02:46 +0300
committerRob Herring <robh@kernel.org>2023-07-27 20:04:07 +0300
commitd6ce4f0ea19c32f10867ed93d8386924326ab474 (patch)
tree9494b3b51503c9182348c21f28c8f2b7a3509547 /drivers/of
parent3e77308102571db549f971e661deb4998294c832 (diff)
downloadlinux-d6ce4f0ea19c32f10867ed93d8386924326ab474.tar.xz
of: unittest: fix null pointer dereferencing in of_unittest_find_node_by_name()
when kmalloc() fail to allocate memory in kasprintf(), name or full_name will be NULL, strcmp() will cause null pointer dereference. Fixes: 0d638a07d3a1 ("of: Convert to using %pOF instead of full_name") Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com> Link: https://lore.kernel.org/r/20230727080246.519539-1-ruanjinjie@huawei.com Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/unittest.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index a406a12eb208..e5b0eea8011c 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -77,7 +77,7 @@ static void __init of_unittest_find_node_by_name(void)
np = of_find_node_by_path("/testcase-data");
name = kasprintf(GFP_KERNEL, "%pOF", np);
- unittest(np && !strcmp("/testcase-data", name),
+ unittest(np && name && !strcmp("/testcase-data", name),
"find /testcase-data failed\n");
of_node_put(np);
kfree(name);
@@ -88,14 +88,14 @@ static void __init of_unittest_find_node_by_name(void)
np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a");
name = kasprintf(GFP_KERNEL, "%pOF", np);
- unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
+ unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
"find /testcase-data/phandle-tests/consumer-a failed\n");
of_node_put(np);
kfree(name);
np = of_find_node_by_path("testcase-alias");
name = kasprintf(GFP_KERNEL, "%pOF", np);
- unittest(np && !strcmp("/testcase-data", name),
+ unittest(np && name && !strcmp("/testcase-data", name),
"find testcase-alias failed\n");
of_node_put(np);
kfree(name);
@@ -106,7 +106,7 @@ static void __init of_unittest_find_node_by_name(void)
np = of_find_node_by_path("testcase-alias/phandle-tests/consumer-a");
name = kasprintf(GFP_KERNEL, "%pOF", np);
- unittest(np && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
+ unittest(np && name && !strcmp("/testcase-data/phandle-tests/consumer-a", name),
"find testcase-alias/phandle-tests/consumer-a failed\n");
of_node_put(np);
kfree(name);
@@ -1533,6 +1533,8 @@ static void attach_node_and_children(struct device_node *np)
const char *full_name;
full_name = kasprintf(GFP_KERNEL, "%pOF", np);
+ if (!full_name)
+ return;
if (!strcmp(full_name, "/__local_fixups__") ||
!strcmp(full_name, "/__fixups__")) {