iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

objtool: Add stackleak instrumentation to uaccess safe list

Browse Source 
If a function has a large stack frame, the stackleak plugin adds a call
to stackleak_track_stack() after the prologue.

This function may be called in uaccess-enabled code.  Add it to the
uaccess safe list.

Fixes the following warning:

  vmlinux.o: warning: objtool: kasan_report+0x12: call to stackleak_track_stack() with UACCESS enabled

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/42e9b487ef89e9b237fd5220ad1c7cf1a2ad7eb8.1681320562.git.jpoimboe@kernel.org
This commit is contained in:
Josh Poimboeuf 2023-04-12 10:29:35 -07:00 committed by Peter Zijlstra
parent e18398e80c
commit 7f530fba11
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
tools/objtool/check.c
View File

@ -1279,6 +1279,8 @@ static const char *uaccess_safe_builtin[] = {
"__ubsan_handle_type_mismatch_v1",
"__ubsan_handle_shift_out_of_bounds",
"__ubsan_handle_load_invalid_value",
/* STACKLEAK */
"stackleak_track_stack",
/* misc */
"csum_partial_copy_generic",
"copy_mc_fragile",