Messages in this thread Patch in this message | | | From | Aditya Pakki <> | Subject | [PATCH] x86: hpet: Fix to avoid potential NULL pointer dereference | Date | Mon, 18 Mar 2019 21:19:56 -0500 |
| |
hpet_virt_address may be NULL when ioremap_nocache fails. The patch checks for such a scenario and avoids NULL pointer dereference.
Signed-off-by: Aditya Pakki <pakki001@umn.edu> --- arch/x86/kernel/hpet.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index dfd3aca82c61..fb32925a2e62 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -905,6 +905,8 @@ int __init hpet_enable(void) return 0; hpet_set_mapping(); + if (!hpet_virt_address) + return 0; /* * Read the period and check for a sane value: -- 2.17.1
| |