Messages in this thread Patch in this message | | | From | Defang Bo <> | Subject | [PATCH] kgdbts: Passing ekgdbts to command line causes panic | Date | Sun, 27 Dec 2020 21:43:05 +0800 |
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Similar to commit<1bd54d85>,kgdbts_option_setup does not check input argument before passing it to strlen. The argument would be a NULL pointer.
Signed-off-by: Defang Bo <bodefang@126.com> --- drivers/misc/kgdbts.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/misc/kgdbts.c b/drivers/misc/kgdbts.c index 945701b..99d9795 100644 --- a/drivers/misc/kgdbts.c +++ b/drivers/misc/kgdbts.c @@ -1057,6 +1057,11 @@ static void kgdbts_run_tests(void) static int kgdbts_option_setup(char *opt) { + if (!opt) { + pr_err("kgdbts: config string not provided\n"); + return -EINVAL; + } + if (strlen(opt) >= MAX_CONFIG_LEN) { printk(KERN_ERR "kgdbts: config string too long\n"); return -ENOSPC; -- 2.7.4
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