As of the "arm64: expose FAR_EL1 tag bits in siginfo" patch, the address that is passed to report_tag_fault has pointer tags in the format of 0x0X, while KASAN uses 0xFX format (note the difference in the top 4 bits). Fix up the pointer tag before calling kasan_report. Link: https://linux-review.googlesource.com/id/I9ced973866036d8679e8f4ae325de547eb969649 Fixes: dceec3ff7807 ("arm64: expose FAR_EL1 tag bits in siginfo") Fixes: 4291e9ee6189 ("kasan, arm64: print report from tag fault handler") Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> --- arch/arm64/mm/fault.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index 3c40da479899..a218f6f2fdc8 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -304,6 +304,8 @@ static void report_tag_fault(unsigned long addr, unsigned int esr, { bool is_write = ((esr & ESR_ELx_WNR) >> ESR_ELx_WNR_SHIFT) != 0; + /* The format of KASAN tags is 0xF<x>. */ + addr |= (0xF0UL << MTE_TAG_SHIFT); /* * SAS bits aren't set for all faults reported in EL1, so we can't * find out access size. -- 2.30.0.284.gd98b1dd5eaa7-goog
