Messages in this thread | | | Date | Tue, 18 Nov 2008 14:30:15 -0800 | From | Andrew Morton <> | Subject | Re: [PATCH] [WATCHDOG] [hpwdt] Set the mapped BIOS address space as executable |
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On Fri, 14 Nov 2008 15:47:03 +0100 Bernhard Walle <bwalle@suse.de> wrote:
> The address provided by the SMBIOS/DMI CRU information is mapped via > ioremap() in the virtual address space. However, since the address > is executed (i.e. call'd), we need to set that pages as executable. > > Without that, I get following oops on a HP ProLiant DL385 G2 > machine with BIOS from 05/29/2008 when I trigger crashdump: > > BUG: unable to handle kernel paging request at ffffc20011090c00 > IP: [<ffffc20011090c00>] 0xffffc20011090c00 > PGD 12f813067 PUD 7fe6a067 PMD 7effe067 PTE 80000000fffd3173 > Oops: 0011 [1] SMP > last sysfs file: /sys/devices/system/cpu/cpu3/cache/index2/shared_cpu_map > CPU 1 > Modules linked in: autofs4 ipv6 af_packet cpufreq_conservative cpufreq_userspace > cpufreq_powersave powernow_k8 fuse loop dm_mod rtc_cmos ipmi_si sg rtc_core i2c > _piix4 ipmi_msghandler bnx2 sr_mod container button i2c_core hpilo joydev pcspkr > rtc_lib shpchp hpwdt cdrom pci_hotplug usbhid hid ff_memless ohci_hcd ehci_hcd > uhci_hcd usbcore edd ext3 mbcache jbd fan ide_pci_generic serverworks ide_core p > ata_serverworks pata_acpi cciss ata_generic libata scsi_mod dock thermal process > or thermal_sys hwmon > Supported: Yes > Pid: 0, comm: swapper Not tainted 2.6.27.5-HEAD_20081111100657-default #1 > RIP: 0010:[<ffffc20011090c00>] [<ffffc20011090c00>] 0xffffc20011090c00 > RSP: 0018:ffff88012f6f9e68 EFLAGS: 00010046 > RAX: 0000000000000d02 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 > RBP: ffff88012f6f9e98 R08: 666666666666660a R09: ffffffffa1006fc0 > R10: 0000000000000000 R11: ffff88012f6f3ea8 R12: ffffc20011090c00 > R13: ffff88012f6f9ee8 R14: 000000000000000e R15: 0000000000000000 > FS: 00007ff70b29a6f0(0000) GS:ffff88012f6512c0(0000) knlGS:0000000000000000 > CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b > CR2: ffffc20011090c00 CR3: 0000000000201000 CR4: 00000000000006e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > Process swapper (pid: 0, threadinfo ffff88012f6f2000, task ffff88007fa8a1c0) > Stack: ffffffffa0f8502b 0000000000000002 ffffffff80738d50 0000000000000000 > 0000000000000046 0000000000000046 00000000fffffffe ffffffffa0f852ec > 0000000000000000 ffffffff804ad9a6 0000000000000000 0000000000000000 > Call Trace: > Inexact backtrace: > > <NMI> [<ffffffffa0f8502b>] ? asminline_call+0x2b/0x55 [hpwdt] > [<ffffffffa0f852ec>] hpwdt_pretimeout+0x3c/0xa0 [hpwdt] > [<ffffffff804ad9a6>] ? notifier_call_chain+0x29/0x4c > [<ffffffff802587e4>] ? notify_die+0x2d/0x32 > [<ffffffff804abbdc>] ? default_do_nmi+0x53/0x1d9 > [<ffffffff804abd90>] ? do_nmi+0x2e/0x43 > [<ffffffff804ab552>] ? nmi+0xa2/0xd0 > [<ffffffff80221ef9>] ? native_safe_halt+0x2/0x3 > <<EOE>> [<ffffffff8021345d>] ? default_idle+0x38/0x54 > [<ffffffff8021359a>] ? c1e_idle+0x118/0x11c > [<ffffffff8020b3b5>] ? cpu_idle+0xa9/0xf1 > > > Code: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff <55> 50 e8 00 00 00 00 58 48 2d 07 10 40 00 48 8b e8 58 e9 68 02 > RIP [<ffffc20011090c00>] 0xffffc20011090c00 > RSP <ffff88012f6f9e68> > CR2: ffffc20011090c00 > Kernel panic - not syncing: Fatal exception > > > Signed-off-by: Bernhard Walle <bwalle@suse.de> > --- > drivers/watchdog/hpwdt.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/drivers/watchdog/hpwdt.c b/drivers/watchdog/hpwdt.c > index 9890dff..e83e1ac 100644 > --- a/drivers/watchdog/hpwdt.c > +++ b/drivers/watchdog/hpwdt.c > @@ -40,6 +40,7 @@ > #include <linux/bootmem.h> > #include <linux/slab.h> > #include <asm/desc.h> > +#include <asm/cacheflush.h> > > #define PCI_BIOS32_SD_VALUE 0x5F32335F /* "_32_" */ > #define CRU_BIOS_SIGNATURE_VALUE 0x55524324 > @@ -394,6 +395,8 @@ static void __devinit dmi_find_cru(const struct dmi_header *dm) > smbios_cru64_ptr->double_offset; > cru_rom_addr = ioremap(cru_physical_address, > smbios_cru64_ptr->double_length); > + set_memory_x((unsigned long)cru_rom_addr & PAGE_MASK, > + smbios_cru64_ptr->double_length >> PAGE_SHIFT); > } > } > }
This is also needed in 2.6.27.x, yes?
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