GCC 14 introduces a new -Walloc-size warning (https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Wno-alloc-size)
which triggers on the following amdgpu files:
"""
/var/tmp/portage/sys-kernel/gentoo-kernel-6.5.10/work/linux-6.5/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c: In function ‘kgd_hqd_dump’:
/var/tmp/portage/sys-kernel/gentoo-kernel-6.5.10/work/linux-6.5/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c:241:15: error: allocation of insufficient size ‘4’ for type ‘uint32_t[2]’ {aka ‘unsigned int[2
]’} with size ‘8’ [-Werror=alloc-size[https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Walloc-size]]
241 | *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
| ^
/var/tmp/portage/sys-kernel/gentoo-kernel-6.5.10/work/linux-6.5/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c: In function ‘kgd_hqd_sdma_dump’:
/var/tmp/portage/sys-kernel/gentoo-kernel-6.5.10/work/linux-6.5/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c:327:15: error: allocation of insufficient size ‘4’ for type ‘uint32_t[2]’ {aka ‘unsigned int[2
]’} with size ‘8’ [-Werror=alloc-size[https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Walloc-size]]
327 | *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
| ^
/var/tmp/portage/sys-kernel/gentoo-kernel-6.5.10/work/linux-6.5/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c: In function ‘kgd_arcturus_hqd_sdma_dump’:
/var/tmp/portage/sys-kernel/gentoo-kernel-6.5.10/work/linux-6.5/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c:203:15: error: allocation of insufficient size ‘4’ for type ‘uint32_t[2]’ {aka ‘unsigned int
[2]’} with size ‘8’ [-Werror=alloc-size[https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Walloc-size]]
203 | *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
| ^
/var/tmp/portage/sys-kernel/gentoo-kernel-6.5.10/work/linux-6.5/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c: In function ‘kgd_gfx_v9_4_3_hqd_sdma_dump’:
/var/tmp/portage/sys-kernel/gentoo-kernel-6.5.10/work/linux-6.5/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c:142:15: error: allocation of insufficient size ‘4’ for type ‘uint32_t[2]’ {aka ‘unsigned int
[2]’} with size ‘8’ [-Werror=alloc-size[https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html#index-Walloc-size]]
142 | *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
| ^
"""
$ gcc-14 --version
gcc-14 (Gentoo Hardened 14.0.0 p, commit
2b02f083e67e97f8187d3ec023c3d281f49232c0) 14.0.0 20231104 (experimental)
8d22ac6a18cf542cd541c06b2a7df8fdd293946d
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is
NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
thanks,
sam
GCC 14 introduces a new -Walloc-size included in -Wextra which errors out
on various files in drivers/gpu/drm/amd/amdgpu like:
```
amdgpu_amdkfd_gfx_v8.c:241:15: error: allocation of insufficient size ‘4’ for type ‘uint32_t[2]’ {aka ‘unsigned int[2]'} with size ‘8’ [-Werror=alloc-size]
```
This is because each HQD_N_REGS is actually a uint32_t[2]. Move the * 2 to
the size argument so GCC sees we're allocating enough.
Originally did 'sizeof(uint32_t) * 2' for the size but a friend suggested
'sizeof(**dump)' better communicates the intent.
Link: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Sam James <[email protected]>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c | 2 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c | 4 ++--
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c | 4 ++--
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c | 4 ++--
5 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c
index 625db444df1c..0ba15dcbe4e1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c
@@ -200,7 +200,7 @@ int kgd_arcturus_hqd_sdma_dump(struct amdgpu_device *adev,
#undef HQD_N_REGS
#define HQD_N_REGS (19+6+7+10)
- *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
+ *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
if (*dump == NULL)
return -ENOMEM;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c
index 490c8f5ddb60..ca7238b5535b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c
@@ -141,7 +141,7 @@ static int kgd_gfx_v9_4_3_hqd_sdma_dump(struct amdgpu_device *adev,
(*dump)[i++][1] = RREG32(addr); \
} while (0)
- *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
+ *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
if (*dump == NULL)
return -ENOMEM;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c
index 6bf448ab3dff..ca4a6b82817f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c
@@ -214,7 +214,7 @@ static int kgd_hqd_dump(struct amdgpu_device *adev,
(*dump)[i++][1] = RREG32(addr); \
} while (0)
- *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
+ *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
if (*dump == NULL)
return -ENOMEM;
@@ -301,7 +301,7 @@ static int kgd_hqd_sdma_dump(struct amdgpu_device *adev,
#undef HQD_N_REGS
#define HQD_N_REGS (19+4)
- *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
+ *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
if (*dump == NULL)
return -ENOMEM;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
index cd06e4a6d1da..0f3e2944edd7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
@@ -238,7 +238,7 @@ static int kgd_hqd_dump(struct amdgpu_device *adev,
(*dump)[i++][1] = RREG32(addr); \
} while (0)
- *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
+ *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
if (*dump == NULL)
return -ENOMEM;
@@ -324,7 +324,7 @@ static int kgd_hqd_sdma_dump(struct amdgpu_device *adev,
#undef HQD_N_REGS
#define HQD_N_REGS (19+4+2+3+7)
- *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
+ *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
if (*dump == NULL)
return -ENOMEM;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
index 51011e8ee90d..a3355b90aac5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
@@ -365,7 +365,7 @@ int kgd_gfx_v9_hqd_dump(struct amdgpu_device *adev,
(*dump)[i++][1] = RREG32(addr); \
} while (0)
- *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
+ *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
if (*dump == NULL)
return -ENOMEM;
@@ -462,7 +462,7 @@ static int kgd_hqd_sdma_dump(struct amdgpu_device *adev,
#undef HQD_N_REGS
#define HQD_N_REGS (19+6+7+10)
- *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
+ *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
if (*dump == NULL)
return -ENOMEM;
--
2.42.1
Applied. Thanks!
Alex
On Sun, Nov 5, 2023 at 11:07 AM Sam James <[email protected]> wrote:
>
> GCC 14 introduces a new -Walloc-size included in -Wextra which errors out
> on various files in drivers/gpu/drm/amd/amdgpu like:
> ```
> amdgpu_amdkfd_gfx_v8.c:241:15: error: allocation of insufficient size ‘4’ for type ‘uint32_t[2]’ {aka ‘unsigned int[2]'} with size ‘8’ [-Werror=alloc-size]
> ```
>
> This is because each HQD_N_REGS is actually a uint32_t[2]. Move the * 2 to
> the size argument so GCC sees we're allocating enough.
>
> Originally did 'sizeof(uint32_t) * 2' for the size but a friend suggested
> 'sizeof(**dump)' better communicates the intent.
>
> Link: https://lore.kernel.org/all/[email protected]/
> Signed-off-by: Sam James <[email protected]>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c | 4 ++--
> drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c | 4 ++--
> drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c | 4 ++--
> 5 files changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c
> index 625db444df1c..0ba15dcbe4e1 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_arcturus.c
> @@ -200,7 +200,7 @@ int kgd_arcturus_hqd_sdma_dump(struct amdgpu_device *adev,
> #undef HQD_N_REGS
> #define HQD_N_REGS (19+6+7+10)
>
> - *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
> + *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
> if (*dump == NULL)
> return -ENOMEM;
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c
> index 490c8f5ddb60..ca7238b5535b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gc_9_4_3.c
> @@ -141,7 +141,7 @@ static int kgd_gfx_v9_4_3_hqd_sdma_dump(struct amdgpu_device *adev,
> (*dump)[i++][1] = RREG32(addr); \
> } while (0)
>
> - *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
> + *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
> if (*dump == NULL)
> return -ENOMEM;
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c
> index 6bf448ab3dff..ca4a6b82817f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c
> @@ -214,7 +214,7 @@ static int kgd_hqd_dump(struct amdgpu_device *adev,
> (*dump)[i++][1] = RREG32(addr); \
> } while (0)
>
> - *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
> + *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
> if (*dump == NULL)
> return -ENOMEM;
>
> @@ -301,7 +301,7 @@ static int kgd_hqd_sdma_dump(struct amdgpu_device *adev,
> #undef HQD_N_REGS
> #define HQD_N_REGS (19+4)
>
> - *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
> + *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
> if (*dump == NULL)
> return -ENOMEM;
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
> index cd06e4a6d1da..0f3e2944edd7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v8.c
> @@ -238,7 +238,7 @@ static int kgd_hqd_dump(struct amdgpu_device *adev,
> (*dump)[i++][1] = RREG32(addr); \
> } while (0)
>
> - *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
> + *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
> if (*dump == NULL)
> return -ENOMEM;
>
> @@ -324,7 +324,7 @@ static int kgd_hqd_sdma_dump(struct amdgpu_device *adev,
> #undef HQD_N_REGS
> #define HQD_N_REGS (19+4+2+3+7)
>
> - *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
> + *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
> if (*dump == NULL)
> return -ENOMEM;
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
> index 51011e8ee90d..a3355b90aac5 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
> @@ -365,7 +365,7 @@ int kgd_gfx_v9_hqd_dump(struct amdgpu_device *adev,
> (*dump)[i++][1] = RREG32(addr); \
> } while (0)
>
> - *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
> + *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
> if (*dump == NULL)
> return -ENOMEM;
>
> @@ -462,7 +462,7 @@ static int kgd_hqd_sdma_dump(struct amdgpu_device *adev,
> #undef HQD_N_REGS
> #define HQD_N_REGS (19+6+7+10)
>
> - *dump = kmalloc_array(HQD_N_REGS * 2, sizeof(uint32_t), GFP_KERNEL);
> + *dump = kmalloc_array(HQD_N_REGS, sizeof(**dump), GFP_KERNEL);
> if (*dump == NULL)
> return -ENOMEM;
>
> --
> 2.42.1
>