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| author | Ales Novak <alnovak@suse.cz> | 2016-10-11 13:53:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-11 15:06:32 -0700 |
| commit | 0a5bf409d3eefc1ca64cedf0bc1c0673164cacc1 (patch) | |
| tree | 21c48f939afc592ecd4273ec956d8a17bf4ff1e8 /kernel/audit.c | |
| parent | 086e774a57fba4695f14383c0818994c0b31da7c (diff) | |
| download | linux-0a5bf409d3eefc1ca64cedf0bc1c0673164cacc1.tar.bz2 | |
ptrace: clear TIF_SYSCALL_TRACE on ptrace detach
On __ptrace_detach(), called from do_exit()->exit_notify()->
forget_original_parent()->exit_ptrace(), the TIF_SYSCALL_TRACE in
thread->flags of the tracee is not cleared up. This results in the
tracehook_report_syscall_* being called (though there's no longer a tracer
listening to that) upon its further syscalls.
Example scenario - attach "strace" to a running process and kill it (the
strace) with SIGKILL. You'll see that the syscall trace hooks are still
being called.
The clearing of this flag should be moved from ptrace_detach() to
__ptrace_detach().
Link: http://lkml.kernel.org/r/1472759493-20554-1-git-send-email-alnovak@suse.cz
Signed-off-by: Ales Novak <alnovak@suse.cz>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/audit.c')
0 files changed, 0 insertions, 0 deletions