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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2018-02-20 11:37:52 -0600 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-02-21 16:54:06 +0100 |
| commit | dc1dd184c2f0016bec35c0d7a48c057e0ad763d3 (patch) | |
| tree | 43323dde05f7db864de96e8dfbaafc1397142268 /kernel/extable.c | |
| parent | 33352244706369ea6736781ae41fe41692eb69bb (diff) | |
| download | linux-dc1dd184c2f0016bec35c0d7a48c057e0ad763d3.tar.gz linux-dc1dd184c2f0016bec35c0d7a48c057e0ad763d3.tar.bz2 linux-dc1dd184c2f0016bec35c0d7a48c057e0ad763d3.zip | |
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