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| author | Jason Wessel <jason.wessel@windriver.com> | 2012-03-29 13:17:17 +0200 |
|---|---|---|
| committer | Jason Wessel <jason.wessel@windriver.com> | 2012-03-30 00:41:23 +0200 |
| commit | 78724b8ef83fc2bcfbc0a72a7ad8a3ce5ad25e6a (patch) | |
| tree | f1f9bfae9d197765d361779a458aa1dfdb135193 /kernel/debug/kdb/kdb_io.c | |
| parent | kdb: Add message about CONFIG_DEBUG_RODATA on failure to install breakpoint (diff) | |
| download | linux-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/debug/kdb/kdb_io.c')
| -rw-r--r-- | kernel/debug/kdb/kdb_io.c | 2 |
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--) { |