powerpc/ftrace: Add recursion protection in prepare_ftrace_return()
The function_graph_enter() does not provide any recursion protection. Add a protection in prepare_ftrace_return() in case function_graph_enter() calls something that gets function graph traced. Fixes: 83021378 ("powerpc/ftrace: directly call of function graph tracer by ftrace caller") Reported-by:Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> Signed-off-by:
Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/74edf2ff0a60e66b0d9225a137100a86a0557032.1644949750.git.christophe.leroy@csgroup.eu
parent
34d8dac8
Please register or sign in to comment