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| author | Markus Metzger <markus.t.metzger@intel.com> | 2009-02-11 15:10:27 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-02-11 15:44:20 +0100 |
| commit | 9f339e7028e2855717af3193c938f9960ad13b38 (patch) | |
| tree | 76e0e9181f4ee2b324742d517518e837d5c250bf /usr | |
| parent | 06eb23b1ba39c61ee5d5faeb42a097635693e370 (diff) | |
| download | linux-3.10-9f339e7028e2855717af3193c938f9960ad13b38.tar.gz linux-3.10-9f339e7028e2855717af3193c938f9960ad13b38.tar.bz2 linux-3.10-9f339e7028e2855717af3193c938f9960ad13b38.zip | |
x86, ptrace, mm: fix double-free on race
Ptrace_detach() races with __ptrace_unlink() if the traced task is
reaped while detaching. This might cause a double-free of the BTS
buffer.
Change the ptrace_detach() path to only do the memory accounting in
ptrace_bts_detach() and leave the buffer free to ptrace_bts_untrace()
which will be called from __ptrace_unlink().
The fix follows a proposal from Oleg Nesterov.
Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Markus Metzger <markus.t.metzger@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'usr')
0 files changed, 0 insertions, 0 deletions