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| author | Peter Zijlstra <peterz@infradead.org> | 2023-01-12 22:43:56 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-01-13 13:48:17 +0300 |
| commit | f18b0d7ee815abb33eb1cc540fdde64fbb922d1a (patch) | |
| tree | 17f9a9c11cfaddcf81309b1a903bf66e0cbf64b3 /tools/objtool | |
| parent | ca502fc6d9d90c8384eb3e97e964177521d9df48 (diff) | |
| download | linux-f18b0d7ee815abb33eb1cc540fdde64fbb922d1a.tar.xz | |
ubsan: Fix objtool UACCESS warns
clang-14 allyesconfig gives:
vmlinux.o: warning: objtool: emulator_cmpxchg_emulated+0x705: call to __ubsan_handle_load_invalid_value() with UACCESS enabled
vmlinux.o: warning: objtool: paging64_update_accessed_dirty_bits+0x39e: call to __ubsan_handle_load_invalid_value() with UACCESS enabled
vmlinux.o: warning: objtool: paging32_update_accessed_dirty_bits+0x390: call to __ubsan_handle_load_invalid_value() with UACCESS enabled
vmlinux.o: warning: objtool: ept_update_accessed_dirty_bits+0x43f: call to __ubsan_handle_load_invalid_value() with UACCESS enabled
Add the required eflags save/restore and whitelist the thing.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Tested-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lore.kernel.org/r/20230112195541.906007455@infradead.org
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/check.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 64954aa83522..9767babfd9ed 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1216,6 +1216,7 @@ static const char *uaccess_safe_builtin[] = { "__ubsan_handle_type_mismatch", "__ubsan_handle_type_mismatch_v1", "__ubsan_handle_shift_out_of_bounds", + "__ubsan_handle_load_invalid_value", /* misc */ "csum_partial_copy_generic", "copy_mc_fragile", |