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authorTobin C. Harding <me@tobin.cc>2018-06-22 09:15:34 +1000
committerTheodore Ts'o <tytso@mit.edu>2018-07-17 21:32:48 -0400
commit3672476edaa0660eb833f54fa9edeb505417b75c (patch)
treed60f9e1875ca9fe64a831be8ec83bebcc416257a /lib/ts_bm.c
parent1c4facb846c7f863bc65483394e80acdbacf671b (diff)
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vsprintf: Add command line option debug_boot_weak_hash
Currently printing [hashed] pointers requires enough entropy to be available. Early in the boot sequence this may not be the case resulting in a dummy string '(____ptrval____)' being printed. This makes debugging the early boot sequence difficult. We can relax the requirement to use cryptographically secure hashing during debugging. This enables debugging while keeping development/production kernel behaviour the same. If new command line option debug_boot_weak_hash is enabled use cryptographically insecure hashing and hash pointer value immediately. Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Tobin C. Harding <me@tobin.cc> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
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