function-graph: always initialize task ret_stack

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On creating a new task while running the function graph tracer, if
we fail to allocate the ret_stack, and then fail the fork, the
code will free the parent ret_stack. This is because the child
duplicated the parent and currently points to the parent's ret_stack.

This patch always initializes the task's ret_stack to NULL.

[ Impact: prevent crash of parent on low memory during fork ]

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Steven Rostedt 2009-06-02 16:51:55 -04:00 • committed by Steven Rostedt

parent f7e8b616ed

commit 84047e360a

1 changed files with 4 additions and 2 deletions

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kernel/trace/ftrace.c

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