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| author | Éric Piel <Eric.Piel@tremplin-utc.net> | 2008-02-05 00:04:50 +0100 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-06 22:07:51 -0500 |
| commit | 6ed31e92e94830c138fbd470486383380710069a (patch) | |
| tree | 76d74ac2cc7637fca6462727b273cf0c14e24da8 | |
| parent | 71fc47a9adf8ee89e5c96a47222915c5485ac437 (diff) | |
| download | blackbird-op-linux-6ed31e92e94830c138fbd470486383380710069a.tar.gz blackbird-op-linux-6ed31e92e94830c138fbd470486383380710069a.zip | |
ACPI: Taint kernel on ACPI table override (format corrected)
When an ACPI table is overridden (for now this can happen only for DSDT)
display a big warning and taint the kernel with flag A.
Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: Len Brown <len.brown@intel.com>
| -rw-r--r-- | drivers/acpi/osl.c | 7 | ||||
| -rw-r--r-- | include/linux/kernel.h | 1 | ||||
| -rw-r--r-- | kernel/panic.c | 5 |
3 files changed, 11 insertions, 2 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 131936e7ff17..bbd8360bfb23 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -392,6 +392,13 @@ acpi_os_table_override(struct acpi_table_header * existing_table, *new_table = initrd_table; } #endif + if (*new_table != NULL) { + printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " + "this is unsafe: tainting kernel\n", + existing_table->signature, + existing_table->oem_table_id); + add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); + } return AE_OK; } diff --git a/include/linux/kernel.h b/include/linux/kernel.h index 18222f267bc4..9e01f376840a 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -243,6 +243,7 @@ extern enum system_states { #define TAINT_BAD_PAGE (1<<5) #define TAINT_USER (1<<6) #define TAINT_DIE (1<<7) +#define TAINT_OVERRIDDEN_ACPI_TABLE (1<<8) extern void dump_stack(void) __cold; diff --git a/kernel/panic.c b/kernel/panic.c index d9e90cfe3298..24af9f8bac99 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -161,7 +161,7 @@ const char *print_tainted(void) { static char buf[20]; if (tainted) { - snprintf(buf, sizeof(buf), "Tainted: %c%c%c%c%c%c%c%c", + snprintf(buf, sizeof(buf), "Tainted: %c%c%c%c%c%c%c%c%c", tainted & TAINT_PROPRIETARY_MODULE ? 'P' : 'G', tainted & TAINT_FORCED_MODULE ? 'F' : ' ', tainted & TAINT_UNSAFE_SMP ? 'S' : ' ', @@ -169,7 +169,8 @@ const char *print_tainted(void) tainted & TAINT_MACHINE_CHECK ? 'M' : ' ', tainted & TAINT_BAD_PAGE ? 'B' : ' ', tainted & TAINT_USER ? 'U' : ' ', - tainted & TAINT_DIE ? 'D' : ' '); + tainted & TAINT_DIE ? 'D' : ' ', + tainted & TAINT_OVERRIDDEN_ACPI_TABLE ? 'A' : ' '); } else snprintf(buf, sizeof(buf), "Not tainted"); |
