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  • Steven Rostedt's avatar
    tracing: protect reader of cmdline output · 4ca53085
    Steven Rostedt authored
    Impact: fix to one cause of incorrect comm outputs in trace
    The spinlock only protected the creation of a comm <=> pid pair.
    But it was possible that a reader could look up a pid, and get the
    wrong comm because it had no locking.
    This also required changing trace_find_cmdline to copy the comm cache
    and not just send back a pointer to it.
    Signed-off-by: default avatarSteven Rostedt <>