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authorJason Wessel <jason.wessel@windriver.com>2012-03-29 13:17:17 +0200
committerJason Wessel <jason.wessel@windriver.com>2012-03-30 00:41:23 +0200
commit78724b8ef83fc2bcfbc0a72a7ad8a3ce5ad25e6a (patch)
treef1f9bfae9d197765d361779a458aa1dfdb135193 /kernel
parentkdb: Add message about CONFIG_DEBUG_RODATA on failure to install breakpoint (diff)
downloadlinux-78724b8ef83fc2bcfbc0a72a7ad8a3ce5ad25e6a.tar.xz
linux-78724b8ef83fc2bcfbc0a72a7ad8a3ce5ad25e6a.zip
kdb: Fix smatch warning on dbg_io_ops->is_console
The Smatch tool warned that the change from commit b8adde8dd (kdb: Avoid using dbg_io_ops until it is initialized) should add another null check later in the kdb_printf(). It is worth noting that the second use of dbg_io_ops->is_console is protected by the KDB_PAGER state variable which would only get set when kdb is fully active and initialized. If we ever encounter changes or defects in the KDB_PAGER state we do not want to crash the kernel in a kdb_printf/printk. CC: Tim Bird <tim.bird@am.sony.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/debug/kdb/kdb_io.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c
index 9b5f17da1c56..bb9520f0f6ff 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -743,7 +743,7 @@ kdb_printit:
kdb_input_flush();
c = console_drivers;
- if (!dbg_io_ops->is_console) {
+ if (dbg_io_ops && !dbg_io_ops->is_console) {
len = strlen(moreprompt);
cp = moreprompt;
while (len--) {