[ Upstream commit a885bcfd152f97b25005298ab2d6b741aed9b49c ]
The intended behavior of function ipmi_hardcode_init_one() is to default to kcs interface when no type argument is presented when initializing ipmi with hard coded addresses.
However, the array of char pointers allocated on the stack by function ipmi_hardcode_init() was not inited to zeroes, so it contained stack debris.
Consequently, passing the cruft stored in this array to function ipmi_hardcode_init_one() caused a crash when it was unable to detect that the char * being passed was nonsense and tried to access the address specified by the bogus pointer.
The fix is simply to initialize the si_type array to zeroes, so if there were no type argument given to at the command line, function ipmi_hardcode_init_one() could properly default to the kcs interface.
Signed-off-by: Tony Camuso tcamuso@redhat.com Message-Id: 1554837603-40299-1-git-send-email-tcamuso@redhat.com Signed-off-by: Corey Minyard cminyard@mvista.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/char/ipmi/ipmi_si_hardcode.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/char/ipmi/ipmi_si_hardcode.c b/drivers/char/ipmi/ipmi_si_hardcode.c index 9ae2405c28bbd..0c28e872ad3ae 100644 --- a/drivers/char/ipmi/ipmi_si_hardcode.c +++ b/drivers/char/ipmi/ipmi_si_hardcode.c @@ -200,6 +200,8 @@ void __init ipmi_hardcode_init(void) char *str; char *si_type[SI_MAX_PARMS];
+ memset(si_type, 0, sizeof(si_type)); + /* Parse out the si_type string into its components. */ str = si_type_str; if (*str != '\0') {