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Commit 3c36c6aa authored by Chuck Ebbert's avatar Chuck Ebbert Committed by Linus Torvalds
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[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: default avatarChuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent cc04ee9c

arch/i386/kernel/ptrace.c

+2 −2
Original line number Diff line number Diff line
@@ -34,10 +34,10 @@ 


/*

 * Determines which flags the user has access to [1 = access, 0 = no access].

 * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).

 * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), NT(14), IOPL(12-13), IF(9).

 * Also masks reserved bits (31-22, 15, 5, 3, 1).

 */

#define FLAG_MASK 0x00054dd5

#define FLAG_MASK 0x00050dd5



/* set's the trap flag. */

#define TRAP_FLAG 0x100