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| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2023-02-16 21:34:41 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-02-23 09:21:50 +0100 |
| commit | 00c8f01c4e84637c3db76f368b8687cb61f4dd9d (patch) | |
| tree | 54c3288a6bcc0bbae8b13dc9c132791987f8ddc1 /arch/um/kernel/vmlinux.lds.S | |
| parent | objtool: Remove instruction::list (diff) | |
| download | linux-00c8f01c4e84637c3db76f368b8687cb61f4dd9d.tar.xz linux-00c8f01c4e84637c3db76f368b8687cb61f4dd9d.zip | |
objtool: Fix ORC 'signal' propagation
There have been some recently reported ORC unwinder warnings like:
WARNING: can't access registers at entry_SYSCALL_64_after_hwframe+0x63/0xcd
WARNING: stack going in the wrong direction? at __sys_setsockopt+0x2c6/0x5b0 net/socket.c:2271
And a KASAN warning:
BUG: KASAN: stack-out-of-bounds in unwind_next_frame (arch/x86/include/asm/ptrace.h:136 arch/x86/kernel/unwind_orc.c:455)
It turns out the 'signal' bit isn't getting propagated from the unwind
hints to the ORC entries, making the unwinder confused at times.
Fixes: ffb1b4a41016 ("x86/unwind/orc: Add 'signal' field to ORC metadata")
Reported-by: kernel test robot <oliver.sang@intel.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/97eef9db60cd86d376a9a40d49d77bb67a8f6526.1676579666.git.jpoimboe@kernel.org
Diffstat (limited to 'arch/um/kernel/vmlinux.lds.S')
0 files changed, 0 insertions, 0 deletions