| commit | d9f65018065ee1b161a85f54132193f248a45439 | |
| author | Arjan van de Ven <arjan@linux.intel.com> | |
| Sat, 26 Sep 2009 18:50:25 +0000 (26 20:50 +0200) | ||
| committer | Len Brown <len.brown@intel.com> | |
| Sat, 3 Oct 2009 04:59:12 +0000 (3 00:59 -0400) | ||
| tree | 40b3d3f68ee8bc38f6c455c8722c95241690f058 | treesnapshot (tar.gz zip) |
| parent | 0efe5e32c8729ef44b00d9a7203e4c99a6378b27 | commitdiff |
ACPI: Fix bound checks for copy_from_user in the acpi /proc code
The ACPI /proc write() code takes an unsigned length argument like any write()
function, but then assigned it to a *signed* integer called "len".
Only after this is a sanity check for len done to make it not larger than 4.
Due to the type change a len < 0 is in principle also possible; this patch
adds a check for this.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
The ACPI /proc write() code takes an unsigned length argument like any write()
function, but then assigned it to a *signed* integer called "len".
Only after this is a sanity check for len done to make it not larger than 4.
Due to the type change a len < 0 is in principle also possible; this patch
adds a check for this.
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
| drivers/acpi/proc.c | diffblobblamehistory |