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ptrace: Fix ptrace_regset() comments and diagnose errors specifically

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Return -EINVAL for the bad size and for unrecognized NT_* type in
ptrace_regset() instead of -EIO.

Also update the comments for this ptrace interface with more clarifications.

Requested-by: Roland McGrath <roland@redhat.com>
Requested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
LKML-Reference: <20100222225240.397523600@sbs-t61.sc.intel.com>
Acked-by: Roland McGrath <roland@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Suresh Siddha
2010-02-22 14:51:32 -08:00
committed by H. Peter Anvin
parent 5e6dbc2607
commit c6a0dd7ec6
2 changed files with 6 additions and 1 deletions
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kernel/ptrace.c
+1 -1
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@@ -537,7 +537,7 @@ static int ptrace_regset(struct task_struct *task, int req, unsigned int type,
int regset_no;
if (!regset || (kiov->iov_len % regset->size) != 0)
return -EIO;
return -EINVAL;
regset_no = regset - view->regsets;
kiov->iov_len = min(kiov->iov_len,