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| author | Michal Simek <michal.simek@xilinx.com> | 2013-03-28 19:42:44 +0400 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2013-05-09 11:04:32 +0400 |
| commit | f663b60f5215b44d147ee0c07d17ffd7e9f3f881 (patch) | |
| tree | def7dc04d57d626adbf66a8eedef49a09bb8c9a1 /arch/microblaze/kernel/process.c | |
| parent | 6dc92c9c3f209cb07fbf282b470ed76787bbc5f8 (diff) | |
| download | linux-f663b60f5215b44d147ee0c07d17ffd7e9f3f881.tar.xz | |
microblaze: Fix uaccess_ok macro
Fix access_ok macro no to permit
case where user will try to access
the last address space which is equal
to segment address.
Example:
segment addr = 0xbfff ffff
address = 0xbfff fff0
size = 0x10
Current wrong implementation
0xbfff ffff >= (0xbfff fff0 | 0x10 | (0xbfff fff0 + 0x10))
0xbfff ffff >= (0xbfff fff0 | 0xc000 0000)
0xbfff ffff >= 0xf000 0000
return 0 which is access failed even the combination is valid.
because get_fs().seq returns the last valid address.
This patch fix this problem.
Size equals to zero is valid access.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/microblaze/kernel/process.c')
0 files changed, 0 insertions, 0 deletions