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Change History

In the Linux kernel, the following vulnerability has been resolved:

tracing/eprobes: Have event probes be consistent with kprobes and uprobes

Currently, if a symbol "@" is attempted to be used with an event probe
(eprobes), it will cause a NULL pointer dereference crash.

Both kprobes and uprobes can reference data other than the main registers.
Such as immediate address, symbols and the current task name. Have eprobes
do the same thing.

For "comm", if "comm" is used and the event being attached to does not
have the "comm" field, then make it the "$comm" that kprobes has. This is
consistent to the way histograms and filters work.

https://git.kernel.org/stable/c/47cc883f21fa3bcf24891b4b455f4cd461ce2d6e

https://git.kernel.org/stable/c/6a832ec3d680b3a4f4fad5752672827d71bae501

https://git.kernel.org/stable/c/b489aca082a23033a3d8355cfb0032f0e2523440