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objtool: Fix another switch table detection issue
commit 1402fd8ed7
upstream.
Continue the switch table detection whack-a-mole. Add a check to
distinguish KASAN data reads from switch data reads. The switch jump
tables in .rodata have relocations associated with them.
This fixes the following warning:
crypto/asymmetric_keys/x509_cert_parser.o: warning: objtool: x509_note_pkey_algo()+0xa4: sibling call from callable instruction with modified stack frame
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/d7c8853022ad47d158cb81e953a40469fc08a95e.1519784382.git.jpoimboe@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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parent
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1 changed files with 5 additions and 1 deletions
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@ -924,7 +924,11 @@ static struct rela *find_switch_table(struct objtool_file *file,
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if (find_symbol_containing(file->rodata, text_rela->addend))
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continue;
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return find_rela_by_dest(file->rodata, text_rela->addend);
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rodata_rela = find_rela_by_dest(file->rodata, text_rela->addend);
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if (!rodata_rela)
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continue;
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return rodata_rela;
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}
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return NULL;
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