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| author | Signed-off by Yi Yang <yi.y.yang@intel.com> | 2007-12-27 21:50:42 -0500 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-12-27 22:19:27 -0500 |
| commit | 975c30257e75c3d067d4858f60963b80fc6bd0e4 (patch) | |
| tree | 27c64337e2109c0704ae6a47a6169618dfb64dea /drivers/acpi/sleep | |
| parent | c68cb23dde29fb107575656effa46f7b9440ac04 (diff) | |
| download | lwn-975c30257e75c3d067d4858f60963b80fc6bd0e4.tar.gz lwn-975c30257e75c3d067d4858f60963b80fc6bd0e4.zip | |
ACPI: detect invalid argument written to /proc/acpi/alarm
/proc/acpi/alarm can't be set correctly, here is a sample:
[root@localhost /]# echo "2006 09" > /proc/acpi/alarm
[root@localhost /]# cat /proc/acpi/alarm
2007-12-09 09:09:09
[root@localhost /]# echo "2006 04" > /proc/acpi/alarm
[root@localhost /]# cat /proc/acpi/alarm
2007-12-04 04:04:04
[root@localhost /]#
Obviously, it is wrong, it should consider it as an invalid input.
after this patch:
[root@localhost /]# echo "2008 09" > /proc/acpi/alarm
-bash: echo: write error: Invalid argument
[root@localhost /]#
Signed-off-by: Yi Yang <yi.y.yang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/sleep')
| -rw-r--r-- | drivers/acpi/sleep/proc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/acpi/sleep/proc.c b/drivers/acpi/sleep/proc.c index 1538355c266b..fce78fbf5f64 100644 --- a/drivers/acpi/sleep/proc.c +++ b/drivers/acpi/sleep/proc.c @@ -178,6 +178,9 @@ static int get_date_field(char **p, u32 * value) * Try to find delimeter, only to insert null. The end of the * string won't have one, but is still valid. */ + if (*p == NULL) + return result; + next = strpbrk(*p, "- :"); if (next) *next++ = '\0'; @@ -190,6 +193,8 @@ static int get_date_field(char **p, u32 * value) if (next) *p = next; + else + *p = NULL; return result; } |