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authorJosh Poimboeuf <jpoimboe@redhat.com>2018-02-20 11:37:52 -0600
committerIngo Molnar <mingo@kernel.org>2018-02-21 16:54:06 +0100
commitdc1dd184c2f0016bec35c0d7a48c057e0ad763d3 (patch)
tree43323dde05f7db864de96e8dfbaafc1397142268 /kernel/extable.c
parent33352244706369ea6736781ae41fe41692eb69bb (diff)
jump_label: Warn on failed jump_label patching attempt
Currently when the jump label code encounters an address which isn't recognized by kernel_text_address(), it just silently fails. This can be dangerous because jump labels are used in a variety of places, and are generally expected to work. Convert the silent failure to a warning. This won't warn about attempted writes to tracepoints in __init code after initmem has been freed, as those are already guarded by the entry->code check. Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Cc: Borislav Petkov <bp@suse.de> Cc: Jason Baron <jbaron@akamai.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/de3a271c93807adb7ed48f4e946b4f9156617680.1519051220.git.jpoimboe@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/extable.c')
0 files changed, 0 insertions, 0 deletions