diff options
| author | Chuck Ebbert <76306.1226@compuserve.com> | 2006-03-23 05:59:39 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-23 10:38:04 -0500 |
| commit | 3c36c6aa4aa1b3483c6a0370028608367426f58e (patch) | |
| tree | 2eaa033543eb67536f7da6ac1912f7a41e87ff7e /arch/i386 | |
| parent | cc04ee9cc527e314e6906849ee931c33764f861e (diff) | |
[PATCH] i386: Don't let ptrace set the nested task bit
There's no good reason for allowing ptrace to set the NT bit in EFLAGS, so
mask it off.
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/ptrace.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/i386/kernel/ptrace.c b/arch/i386/kernel/ptrace.c index 5c1fb6aada5b..506462ef36a0 100644 --- a/arch/i386/kernel/ptrace.c +++ b/arch/i386/kernel/ptrace.c | |||
| @@ -34,10 +34,10 @@ | |||
| 34 | 34 | ||
| 35 | /* | 35 | /* |
| 36 | * Determines which flags the user has access to [1 = access, 0 = no access]. | 36 | * Determines which flags the user has access to [1 = access, 0 = no access]. |
| 37 | * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9). | 37 | * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), NT(14), IOPL(12-13), IF(9). |
| 38 | * Also masks reserved bits (31-22, 15, 5, 3, 1). | 38 | * Also masks reserved bits (31-22, 15, 5, 3, 1). |
| 39 | */ | 39 | */ |
| 40 | #define FLAG_MASK 0x00054dd5 | 40 | #define FLAG_MASK 0x00050dd5 |
| 41 | 41 | ||
| 42 | /* set's the trap flag. */ | 42 | /* set's the trap flag. */ |
| 43 | #define TRAP_FLAG 0x100 | 43 | #define TRAP_FLAG 0x100 |