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| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2025-03-24 14:56:07 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2025-03-25 23:00:15 +0100 |
| commit | 72c774aa9d1e16bfd247096935e7dae194d84929 (patch) | |
| tree | 6414b3ad438d64be2af31b615151c301e62544d3 /tools/objtool | |
| parent | objtool, media: dib8000: Prevent divide-by-zero in dib8000_set_dds() (diff) | |
| download | linux-72c774aa9d1e16bfd247096935e7dae194d84929.tar.gz linux-72c774aa9d1e16bfd247096935e7dae194d84929.zip | |
objtool, panic: Disable SMAP in __stack_chk_fail()
__stack_chk_fail() can be called from uaccess-enabled code. Make sure
uaccess gets disabled before calling panic().
Fixes the following warning:
kernel/trace/trace_branch.o: error: objtool: ftrace_likely_update+0x1ea: call to __stack_chk_fail() with UACCESS enabled
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/a3e97e0119e1b04c725a8aa05f7bc83d98e657eb.1742852847.git.jpoimboe@kernel.org
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/check.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/objtool/check.c b/tools/objtool/check.c index 0caabf0e8faf..3bf29923d5c0 100644 --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1194,12 +1194,15 @@ static const char *uaccess_safe_builtin[] = { "__ubsan_handle_load_invalid_value", /* STACKLEAK */ "stackleak_track_stack", + /* TRACE_BRANCH_PROFILING */ + "ftrace_likely_update", + /* STACKPROTECTOR */ + "__stack_chk_fail", /* misc */ "csum_partial_copy_generic", "copy_mc_fragile", "copy_mc_fragile_handle_tail", "copy_mc_enhanced_fast_string", - "ftrace_likely_update", /* CONFIG_TRACE_BRANCH_PROFILING */ "rep_stos_alternative", "rep_movs_alternative", "__copy_user_nocache", |