diff options
| author | Jiang Liu <liuj97@gmail.com> | 2012-02-03 15:37:16 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-02-13 11:16:54 -0800 |
| commit | ff016619c98fa2edcb44b6cffe5a60435328348a (patch) | |
| tree | 407ced258bde0140cc6981b507987b615b1c9dac /include/linux/flex_array.h | |
| parent | 3ef7302303a7886fd1e6dea9dd33fe2c41784199 (diff) | |
kprobes: fix a memory leak in function pre_handler_kretprobe()
commit 55ca6140e9bb307efc97a9301a4f501de02a6fd6 upstream.
In function pre_handler_kretprobe(), the allocated kretprobe_instance
object will get leaked if the entry_handler callback returns non-zero.
This may cause all the preallocated kretprobe_instance objects exhausted.
This issue can be reproduced by changing
samples/kprobes/kretprobe_example.c to probe "mutex_unlock". And the fix
is straightforward: just put the allocated kretprobe_instance object back
onto the free_instances list.
[akpm@linux-foundation.org: use raw_spin_lock/unlock]
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Jim Keniston <jkenisto@us.ibm.com>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/flex_array.h')
0 files changed, 0 insertions, 0 deletions