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| author | Will Deacon <will.deacon@arm.com> | 2018-02-05 15:34:23 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2018-02-06 22:53:40 +0000 |
| commit | f71c2ffcb20dd8626880747557014bb9a61eb90e (patch) | |
| tree | 9142a5c0744c32676ca16219edcff5e807dbf314 /arch/arm64/lib | |
| parent | 84624087dd7e3b482b7b11c170ebc1f329b3a218 (diff) | |
| download | lwn-f71c2ffcb20dd8626880747557014bb9a61eb90e.tar.gz lwn-f71c2ffcb20dd8626880747557014bb9a61eb90e.zip | |
arm64: uaccess: Mask __user pointers for __arch_{clear, copy_*}_user
Like we've done for get_user and put_user, ensure that user pointers
are masked before invoking the underlying __arch_{clear,copy_*}_user
operations.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/lib')
| -rw-r--r-- | arch/arm64/lib/clear_user.S | 6 | ||||
| -rw-r--r-- | arch/arm64/lib/copy_in_user.S | 5 |
2 files changed, 6 insertions, 5 deletions
diff --git a/arch/arm64/lib/clear_user.S b/arch/arm64/lib/clear_user.S index 3d69a8d41fa5..21ba0b29621b 100644 --- a/arch/arm64/lib/clear_user.S +++ b/arch/arm64/lib/clear_user.S @@ -21,7 +21,7 @@ .text -/* Prototype: int __clear_user(void *addr, size_t sz) +/* Prototype: int __arch_clear_user(void *addr, size_t sz) * Purpose : clear some user memory * Params : addr - user memory address to clear * : sz - number of bytes to clear @@ -29,7 +29,7 @@ * * Alignment fixed up by hardware. */ -ENTRY(__clear_user) +ENTRY(__arch_clear_user) uaccess_enable_not_uao x2, x3, x4 mov x2, x1 // save the size for fixup return subs x1, x1, #8 @@ -52,7 +52,7 @@ uao_user_alternative 9f, strb, sttrb, wzr, x0, 0 5: mov x0, #0 uaccess_disable_not_uao x2, x3 ret -ENDPROC(__clear_user) +ENDPROC(__arch_clear_user) .section .fixup,"ax" .align 2 diff --git a/arch/arm64/lib/copy_in_user.S b/arch/arm64/lib/copy_in_user.S index fbb090f431a5..54b75deb1d16 100644 --- a/arch/arm64/lib/copy_in_user.S +++ b/arch/arm64/lib/copy_in_user.S @@ -64,14 +64,15 @@ .endm end .req x5 -ENTRY(raw_copy_in_user) + +ENTRY(__arch_copy_in_user) uaccess_enable_not_uao x3, x4, x5 add end, x0, x2 #include "copy_template.S" uaccess_disable_not_uao x3, x4 mov x0, #0 ret -ENDPROC(raw_copy_in_user) +ENDPROC(__arch_copy_in_user) .section .fixup,"ax" .align 2 |