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| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2018-02-28 14:19:21 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-02-28 16:03:19 +0100 |
| commit | 1402fd8ed7e5bda1b3e7613b70780b0db392d1e6 (patch) | |
| tree | e5521eb2fcbe4cad6a2a7d0c5906cdb2461a7f09 /tools/objtool | |
| parent | x86/xen: Zero MSR_IA32_SPEC_CTRL before suspend (diff) | |
| download | linux-1402fd8ed7e5bda1b3e7613b70780b0db392d1e6.tar.xz linux-1402fd8ed7e5bda1b3e7613b70780b0db392d1e6.zip | |
objtool: Fix another switch table detection issue
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
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/check.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 472e64e95891..46c1d239cc1b 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -925,7 +925,11 @@ static struct rela *find_switch_table(struct objtool_file *file, if (find_symbol_containing(file->rodata, text_rela->addend)) continue; - return find_rela_by_dest(file->rodata, text_rela->addend); + rodata_rela = find_rela_by_dest(file->rodata, text_rela->addend); + if (!rodata_rela) + continue; + + return rodata_rela; } return NULL; |