tracing/user_events: Ensure user provided strings are safely formatted

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User processes can provide bad strings that may cause issues or leak
kernel details back out. Don't trust the content of these strings
when formatting strings for matching.

This also moves to a consistent dynamic length string creation model.

Link: https://lkml.kernel.org/r/20220728233309.1896-4-beaub@linux.microsoft.com
Link: https://lore.kernel.org/all/2059213643.196683.1648499088753.JavaMail.zimbra@efficios.com/

Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Beau Belgrave <beaub@linux.microsoft.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

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Beau Belgrave 2022-07-28 16:33:06 -07:00 • committed by Steven Rostedt (Google)

parent 95f187603d

commit e6f89a1498

1 changed files with 59 additions and 32 deletions

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kernel/trace/trace_events_user.c

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