Linux/include/linux/ubsan.h at v6.9-rc3 - Linux - PuppyLab Git

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Kees Cook 25b84002af arm64: Support Clang UBSAN trap codes for better reporting

When building with CONFIG_UBSAN_TRAP=y on arm64, Clang encodes the UBSAN
check (handler) type in the esr. Extract this and actually report these
traps as coming from the specific UBSAN check that tripped.

Before:

  Internal error: BRK handler: 00000000f20003e8 [#1] PREEMPT SMP

After:

  Internal error: UBSAN: shift out of bounds: 00000000f2005514 [#1] PREEMPT SMP

Acked-by: Mark Rutland <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>
Acked-by: Mukesh Ojha <[email protected]>
Reviewed-by: Fangrui Song <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: John Stultz <[email protected]>
Cc: Yongqin Liu <[email protected]>
Cc: Sami Tolvanen <[email protected]>
Cc: Yury Norov <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Marco Elver <[email protected]>
Cc: [email protected]
Cc: [email protected]
Signed-off-by: Kees Cook <[email protected]>

2023-02-08 15:26:58 -08:00

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 /* SPDX-License-Identifier: GPL-2.0 */
 #ifndef _LINUX_UBSAN_H
 #define _LINUX_UBSAN_H
 #ifdef CONFIG_UBSAN_TRAP
 const char *report_ubsan_failure(struct pt_regs *regs, u32 check_type);
 #endif
 #endif