Messages in this thread Patch in this message | | | Date | Fri, 21 Jan 2022 18:34:47 -0800 | Subject | [PATCH] arm64: extable: fix null deref in load_unaligned_zeropad. | From | Evgenii Stepanov <> |
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ex_handler_load_unaligned_zeropad extracts the source and data register numbers from the wrong field of the exception table.
Fixes: 753b3236 Signed-off-by: Evgenii Stepanov <eugenis@google.com> --- arch/arm64/mm/extable.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/mm/extable.c b/arch/arm64/mm/extable.c index c0181e60cc98..489455309695 100644 --- a/arch/arm64/mm/extable.c +++ b/arch/arm64/mm/extable.c @@ -40,8 +40,8 @@ static bool ex_handler_load_unaligned_zeropad(const struct exception_table_entry *ex, struct pt_regs *regs) { - int reg_data = FIELD_GET(EX_DATA_REG_DATA, ex->type); - int reg_addr = FIELD_GET(EX_DATA_REG_ADDR, ex->type); + int reg_data = FIELD_GET(EX_DATA_REG_DATA, ex->data); + int reg_addr = FIELD_GET(EX_DATA_REG_ADDR, ex->data); unsigned long data, addr, offset; addr = pt_regs_read_reg(regs, reg_addr); -- 2.35.0.rc0.227.g00780c9af4-goog
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