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author | Srinivasa Ds <srinivasa@in.ibm.com> | 2008-04-28 02:14:26 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-28 08:58:32 -0700 |
commit | 3d8d996e0ca5b4093203d3f050b0f70b5c949ae8 (patch) | |
tree | 2b19d3a47bf723c3bf6ff7c8a0d90078feaee08c /crypto/xts.c | |
parent | 0341a4d0fdd2a0a3d9e2bb3a9afef9f8292c8502 (diff) |
kprobes: prevent probing of preempt_schedule()
Prohibit users from probing preempt_schedule(). One way of prohibiting the
user from probing functions is by marking such functions with __kprobes. But
this method doesn't work for those functions, which are already marked to
different section like preempt_schedule() (belongs to __sched section). So we
use blacklist approach to refuse user from probing these functions.
In blacklist approach we populate the blacklisted function's starting address
and its size in kprobe_blacklist structure. Then we verify the user specified
address against start and end of the blacklisted function. So any attempt to
register probe on blacklisted functions will be rejected.
[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Srinivasa DS <srinivasa@in.ibm.com>
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'crypto/xts.c')
0 files changed, 0 insertions, 0 deletions