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| author | Srinivasa Ds <srinivasa@in.ibm.com> | 2008-02-24 00:24:04 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-24 02:13:24 +0100 |
| commit | 43627582799db317e966ecb0002c2c3c9805ec0f (patch) | |
| tree | fcfd50780b438d0ec04830faa857de9b86665e76 /kernel/sched.c | |
| parent | cgroup memory controller: document huge memory/cache overhead in Kconfig (diff) | |
| download | linux-43627582799db317e966ecb0002c2c3c9805ec0f.tar.xz linux-43627582799db317e966ecb0002c2c3c9805ec0f.zip | |
kprobes: refuse kprobe insertion on add/sub_preempt_counter()
Kprobes makes use of preempt_disable(),preempt_enable_noresched() and these
functions inturn call add/sub_preempt_count(). So we need to refuse user from
inserting probe in to these functions.
This patch disallows user from probing add/sub_preempt_count().
Signed-off-by: Srinivasa DS <srinivasa@in.ibm.com>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sched.c')
| -rw-r--r-- | kernel/sched.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index f28f19e65b59..c4bc8c210958 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -3766,7 +3766,7 @@ void scheduler_tick(void) #if defined(CONFIG_PREEMPT) && defined(CONFIG_DEBUG_PREEMPT) -void add_preempt_count(int val) +void __kprobes add_preempt_count(int val) { /* * Underflow? @@ -3782,7 +3782,7 @@ void add_preempt_count(int val) } EXPORT_SYMBOL(add_preempt_count); -void sub_preempt_count(int val) +void __kprobes sub_preempt_count(int val) { /* * Underflow? |