[PATCH][ISDN][resend] Guard against a potential NULL pointer dereference in old_capi_manufacturer()
(first send: Monday 25 June 2007, resending due to no response) In drivers/isdn/capi/kcapi.c::old_capi_manufacturer(), if the call to get_capi_ctr_by_nr(ldef.contr); in line 823 returns NULL, then we'll be dereferencing a NULL pointer in the very next line. (Found by Coverity checker as bug #402) Signed-off-by: Jesper Juhl <[EMAIL PROTECTED]> --- drivers/isdn/capi/kcapi.c |2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/isdn/capi/kcapi.c b/drivers/isdn/capi/kcapi.c index 3ed34f7..3f9e962 100644 --- a/drivers/isdn/capi/kcapi.c +++ b/drivers/isdn/capi/kcapi.c @@ -821,6 +821,8 @@ static int old_capi_manufacturer(unsigned int cmd, void __user *data) return -EFAULT; } card = get_capi_ctr_by_nr(ldef.contr); + if (!card) + return -EINVAL; card = capi_ctr_get(card); if (!card) return -ESRCH; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH][ISDN][resend] Guard against a potential NULL pointer dereference in old_capi_manufacturer()
(first send: Monday 25 June 2007, resending due to no response) In drivers/isdn/capi/kcapi.c::old_capi_manufacturer(), if the call to get_capi_ctr_by_nr(ldef.contr); in line 823 returns NULL, then we'll be dereferencing a NULL pointer in the very next line. (Found by Coverity checker as bug #402) Signed-off-by: Jesper Juhl [EMAIL PROTECTED] --- drivers/isdn/capi/kcapi.c |2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/drivers/isdn/capi/kcapi.c b/drivers/isdn/capi/kcapi.c index 3ed34f7..3f9e962 100644 --- a/drivers/isdn/capi/kcapi.c +++ b/drivers/isdn/capi/kcapi.c @@ -821,6 +821,8 @@ static int old_capi_manufacturer(unsigned int cmd, void __user *data) return -EFAULT; } card = get_capi_ctr_by_nr(ldef.contr); + if (!card) + return -EINVAL; card = capi_ctr_get(card); if (!card) return -ESRCH; - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
