On Saturday, May 03, 2014 08:59:14 AM Josh Boyer wrote: > On Tue, Apr 29, 2014 at 10:05 PM, Lv Zheng <lv.zheng@xxxxxxxxx> wrote: > > The commit of back porting Linux XSDT validation mechanism has introduced > > a regreession: > > Commit: 671cc68dc61f029d44b43a681356078e02d8dab8 > > Subject: ACPICA: Back port and refine validation of the XSDT root table. > > There is a pointer still accessed after unmapping. > > > > This patch fixes this issue. Lv Zheng. > > > > Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=73911 > > Buglink: https://bugs.archlinux.org/task/39811 > > Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx> > > Reported-and-tested-by: Bruce Chiarelli <mano155@xxxxxxxxx> > > Reported-and-tested-by: Spyros Stathopoulos <spystath@xxxxxxxxx> > > Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx> > > Cc: <stable@xxxxxxxxxxxxxxx> # 3.14.x: 671cc68: ACPICA: Back port and refine validation of the XSDT root table. > > This patch should get into 3.15-rcX soon. It fixes a known regression > that prevents booting on machines with AMI firmware, and that is > present in 3.14 so we need it for stable as well. Rafael? Lv, is it safe to take this patch alone into 3.15-rc? Rafael > > --- > > drivers/acpi/acpica/tbutils.c | 7 +++++-- > > 1 file changed, 5 insertions(+), 2 deletions(-) > > > > diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c > > index 6c31d77..e1638ad 100644 > > --- a/drivers/acpi/acpica/tbutils.c > > +++ b/drivers/acpi/acpica/tbutils.c > > @@ -355,6 +355,7 @@ acpi_status __init acpi_tb_parse_root_table(acpi_physical_address rsdp_address) > > u32 table_count; > > struct acpi_table_header *table; > > acpi_physical_address address; > > + acpi_physical_address rsdt_address; > > u32 length; > > u8 *table_entry; > > acpi_status status; > > @@ -383,11 +384,14 @@ acpi_status __init acpi_tb_parse_root_table(acpi_physical_address rsdp_address) > > * as per the ACPI specification. > > */ > > address = (acpi_physical_address) rsdp->xsdt_physical_address; > > + rsdt_address = > > + (acpi_physical_address) rsdp->rsdt_physical_address; > > table_entry_size = ACPI_XSDT_ENTRY_SIZE; > > } else { > > /* Root table is an RSDT (32-bit physical addresses) */ > > > > address = (acpi_physical_address) rsdp->rsdt_physical_address; > > + rsdt_address = address; > > table_entry_size = ACPI_RSDT_ENTRY_SIZE; > > } > > > > @@ -410,8 +414,7 @@ acpi_status __init acpi_tb_parse_root_table(acpi_physical_address rsdp_address) > > > > /* Fall back to the RSDT */ > > > > - address = > > - (acpi_physical_address) rsdp->rsdt_physical_address; > > + address = rsdt_address; > > table_entry_size = ACPI_RSDT_ENTRY_SIZE; > > } > > } > > -- > > 1.7.10 > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > -- > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
