search for: ptrace_bp

...hread.sp0 = (unsigned long) (childregs+1); @@ -167,36 +168,22 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, task_user_gs(p) = get_user_gs(current_pt_regs()); p->fpu_counter = 0; - p->thread.io_bitmap_ptr = NULL; tsk = current; - err = -ENOMEM; memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); - if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) { - p->thread.io_bitmap_ptr = kmemdup(tsk->thread.io_bitmap_ptr, - IO_BITMAP_BYTES, GFP_KERNEL); - if (!p->thread.io_bitmap_ptr) { - p->thread.io_bitmap_max = 0; - return -ENOME...

...hread.sp = (unsigned long) childregs; p->thread.sp0 = (unsigned long) (childregs+1); @@ -168,34 +169,21 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, p->thread.fpu_counter = 0; p->thread.io_bitmap_ptr = NULL; tsk = current; - err = -ENOMEM; memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); - if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) { - p->thread.io_bitmap_ptr = kmemdup(tsk->thread.io_bitmap_ptr, - IO_BITMAP_BYTES, GFP_KERNEL); - if (!p->thread.io_bitmap_ptr) { - p->thread.io_bitmap_max = 0; - return -ENOME...

...hread.sp = (unsigned long) childregs; p->thread.sp0 = (unsigned long) (childregs+1); @@ -168,34 +169,21 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, p->thread.fpu_counter = 0; p->thread.io_bitmap_ptr = NULL; tsk = current; - err = -ENOMEM; memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); - if (unlikely(test_tsk_thread_flag(tsk, TIF_IO_BITMAP))) { - p->thread.io_bitmap_ptr = kmemdup(tsk->thread.io_bitmap_ptr, - IO_BITMAP_BYTES, GFP_KERNEL); - if (!p->thread.io_bitmap_ptr) { - p->thread.io_bitmap_max = 0; - return -ENOME...

...@ int copy_thread(unsigned long clone_flags, unsigned long sp, childregs->cs = __KERNEL_CS | get_kernel_rpl(); childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; p->thread.fpu_counter = 0; - p->thread.io_bitmap_ptr = NULL; + clear_thread_io_bitmap(p); memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); return 0; } @@ -167,7 +167,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, task_user_gs(p) = get_user_gs(current_pt_regs()); p->thread.fpu_counter = 0; - p->thread.io_bitmap_ptr = NULL; + clear_thread_io_bitmap(p); tsk = cu...

...ned long clone_flags, unsigned long sp, > childregs->cs = __KERNEL_CS | get_kernel_rpl(); > childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; > p->fpu_counter = 0; > - p->thread.io_bitmap_ptr = NULL; > + clear_thread_io_bitmap(p); > memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); > return 0; > } > @@ -269,14 +269,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) > */ > load_TLS(next, cpu); > > - /* > - * Restore IOPL if needed. In normal use, the flags restore > - * in th...

...ned long clone_flags, unsigned long sp, > childregs->cs = __KERNEL_CS | get_kernel_rpl(); > childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; > p->fpu_counter = 0; > - p->thread.io_bitmap_ptr = NULL; > + clear_thread_io_bitmap(p); > memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); > return 0; > } > @@ -269,14 +269,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) > */ > load_TLS(next, cpu); > > - /* > - * Restore IOPL if needed. In normal use, the flags restore > - * in th...

This patch series makes it possible to compile out the iopl and ioperm system calls, which allow privileged processes to request permission to directly poke I/O ports from userspace. Nothing on a modern Linux system uses these calls anymore, and anything new should be using /dev/port instead, or better yet writing a driver. Copying the bloat-o-meter stats from the final patch: 32-bit

This patch series makes it possible to compile out the iopl and ioperm system calls, which allow privileged processes to request permission to directly poke I/O ports from userspace. Nothing on a modern Linux system uses these calls anymore, and anything new should be using /dev/port instead, or better yet writing a driver. Copying the bloat-o-meter stats from the final patch: 32-bit

...155,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, childregs->cs = __KERNEL_CS | get_kernel_rpl(); childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; p->fpu_counter = 0; - p->thread.io_bitmap_ptr = NULL; + clear_thread_io_bitmap(p); memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); return 0; } @@ -269,14 +269,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) */ load_TLS(next, cpu); - /* - * Restore IOPL if needed. In normal use, the flags restore - * in the switch assembly will handle this. But if t...

...= __KERNEL_CS | get_kernel_rpl(); > childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; > p->fpu_counter = 0; > - p->thread.io_bitmap_ptr = NULL; > + clear_thread_io_bitmap(p); > memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); > return 0; > } > @@ -269,14 +269,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) > */ > load_TLS(next, cpu); > > - /* > - * Restore IOPL if needed. In norm...

...= __KERNEL_CS | get_kernel_rpl(); > childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED; > p->fpu_counter = 0; > - p->thread.io_bitmap_ptr = NULL; > + clear_thread_io_bitmap(p); > memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps)); > return 0; > } > @@ -269,14 +269,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) > */ > load_TLS(next, cpu); > > - /* > - * Restore IOPL if needed. In norm...