objtool: Add stackleak instrumentation to uaccess safe list

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

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

authored by

Josh Poimboeuf and committed by

Peter Zijlstra 3 years ago 7f530fba e18398e8

1 changed file

expand all

tools

objtool

check.c

tools/objtool/check.c

··· 1279 1279 "__ubsan_handle_type_mismatch_v1", 1280 1280 "__ubsan_handle_shift_out_of_bounds", 1281 1281 "__ubsan_handle_load_invalid_value", 1282 + /* STACKLEAK */ 1283 + "stackleak_track_stack", 1282 1284 /* misc */ 1283 1285 "csum_partial_copy_generic", 1284 1286 "copy_mc_fragile",

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