When CONFIG_64BIT was disabled, check_copy_size() was declared with
attribute error: copy source size is too small, array_size() for 32BIT
was wrong size, some compiled msg with error like:
CALL scripts/checksyscalls.sh
CC [M] drivers/net/ethernet/mellanox/mlx4/cq.o
In file included from ./arch/x86/include/asm/preempt.h:7,
from ./include/linux/preempt.h:78,
from ./include/linux/percpu.h:6,
from ./include/linux/context_tracking_state.h:5,
from ./include/linux/hardirq.h:5,
from drivers/net/ethernet/mellanox/mlx4/cq.c:37:
In function ‘check_copy_size’,
inlined from ‘copy_to_user’ at ./include/linux/uaccess.h:168:6,
inlined from ‘mlx4_init_user_cqes’ at drivers/net/ethernet/mellanox/mlx4/cq.c:317:9,
inlined from ‘mlx4_cq_alloc’ at drivers/net/ethernet/mellanox/mlx4/cq.c:394:10:
./include/linux/thread_info.h:228:4: error: call to ‘__bad_copy_from’ declared with attribute error: copy source size is too small
228 | __bad_copy_from();
| ^~~~~~~~~~~~~~~~~
make[6]: *** [scripts/Makefile.build:250：drivers/net/ethernet/mellanox/mlx4/cq.o] 错误 1
make[5]: *** [scripts/Makefile.build:500：drivers/net/ethernet/mellanox/mlx4] 错误 2
make[5]: *** 正在等待未完成的任务....
make[4]: *** [scripts/Makefile.build:500：drivers/net/ethernet/mellanox] 错误 2
make[3]: *** [scripts/Makefile.build:500：drivers/net/ethernet] 错误 2
make[3]: *** 正在等待未完成的任务....
make[2]: *** [scripts/Makefile.build:500：drivers/net] 错误 2
make[2]: *** 正在等待未完成的任务....
make[1]: *** [scripts/Makefile.build:500：drivers] 错误 2
make: *** [Makefile:1992：.] 错误 2
Signed-off-by: Yupeng Li <[email protected]>
Reviewed-by: Caicai <[email protected]>
---
drivers/net/ethernet/mellanox/mlx4/cq.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx4/cq.c b/drivers/net/ethernet/mellanox/mlx4/cq.c
index 4d4f9cf9facb..7dadd7227480 100644
--- a/drivers/net/ethernet/mellanox/mlx4/cq.c
+++ b/drivers/net/ethernet/mellanox/mlx4/cq.c
@@ -315,7 +315,11 @@ static int mlx4_init_user_cqes(void *buf, int entries, int cqe_size)
}
} else {
err = copy_to_user((void __user *)buf, init_ents,
+#ifdef CONFIG_64BIT
array_size(entries, cqe_size)) ?
+#else
+ entries * cqe_size) ?
+#endif
-EFAULT : 0;
}
--
2.25.1
On Sat, Jan 07, 2023 at 03:27:25PM +0800, Yupeng Li wrote:
> When CONFIG_64BIT was disabled, check_copy_size() was declared with
> attribute error: copy source size is too small, array_size() for 32BIT
> was wrong size, some compiled msg with error like:
>
> CALL scripts/checksyscalls.sh
> CC [M] drivers/net/ethernet/mellanox/mlx4/cq.o
> In file included from ./arch/x86/include/asm/preempt.h:7,
> from ./include/linux/preempt.h:78,
> from ./include/linux/percpu.h:6,
> from ./include/linux/context_tracking_state.h:5,
> from ./include/linux/hardirq.h:5,
> from drivers/net/ethernet/mellanox/mlx4/cq.c:37:
> In function ‘check_copy_size’,
> inlined from ‘copy_to_user’ at ./include/linux/uaccess.h:168:6,
> inlined from ‘mlx4_init_user_cqes’ at drivers/net/ethernet/mellanox/mlx4/cq.c:317:9,
> inlined from ‘mlx4_cq_alloc’ at drivers/net/ethernet/mellanox/mlx4/cq.c:394:10:
> ./include/linux/thread_info.h:228:4: error: call to ‘__bad_copy_from’ declared with attribute error: copy source size is too small
> 228 | __bad_copy_from();
> | ^~~~~~~~~~~~~~~~~
> make[6]: *** [scripts/Makefile.build:250：drivers/net/ethernet/mellanox/mlx4/cq.o] 错误 1
> make[5]: *** [scripts/Makefile.build:500：drivers/net/ethernet/mellanox/mlx4] 错误 2
> make[5]: *** 正在等待未完成的任务....
> make[4]: *** [scripts/Makefile.build:500：drivers/net/ethernet/mellanox] 错误 2
> make[3]: *** [scripts/Makefile.build:500：drivers/net/ethernet] 错误 2
> make[3]: *** 正在等待未完成的任务....
> make[2]: *** [scripts/Makefile.build:500：drivers/net] 错误 2
> make[2]: *** 正在等待未完成的任务....
> make[1]: *** [scripts/Makefile.build:500：drivers] 错误 2
> make: *** [Makefile:1992：.] 错误 2
>
> Signed-off-by: Yupeng Li <[email protected]>
> Reviewed-by: Caicai <[email protected]>
> ---
> drivers/net/ethernet/mellanox/mlx4/cq.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/net/ethernet/mellanox/mlx4/cq.c b/drivers/net/ethernet/mellanox/mlx4/cq.c
> index 4d4f9cf9facb..7dadd7227480 100644
> --- a/drivers/net/ethernet/mellanox/mlx4/cq.c
> +++ b/drivers/net/ethernet/mellanox/mlx4/cq.c
> @@ -315,7 +315,11 @@ static int mlx4_init_user_cqes(void *buf, int entries, int cqe_size)
> }
> } else {
> err = copy_to_user((void __user *)buf, init_ents,
> +#ifdef CONFIG_64BIT
> array_size(entries, cqe_size)) ?
> +#else
> + entries * cqe_size) ?
> +#endif
> -EFAULT : 0;
This can't possibly make sense, Kees?
Jason
On Mon, Jan 09, 2023 at 09:51:18AM -0400, Jason Gunthorpe wrote:
> On Sat, Jan 07, 2023 at 03:27:25PM +0800, Yupeng Li wrote:
> > When CONFIG_64BIT was disabled, check_copy_size() was declared with
> > attribute error: copy source size is too small, array_size() for 32BIT
> > was wrong size, some compiled msg with error like:
> >
> > CALL scripts/checksyscalls.sh
> > CC [M] drivers/net/ethernet/mellanox/mlx4/cq.o
> > In file included from ./arch/x86/include/asm/preempt.h:7,
> > from ./include/linux/preempt.h:78,
> > from ./include/linux/percpu.h:6,
> > from ./include/linux/context_tracking_state.h:5,
> > from ./include/linux/hardirq.h:5,
> > from drivers/net/ethernet/mellanox/mlx4/cq.c:37:
> > In function ‘check_copy_size’,
> > inlined from ‘copy_to_user’ at ./include/linux/uaccess.h:168:6,
> > inlined from ‘mlx4_init_user_cqes’ at drivers/net/ethernet/mellanox/mlx4/cq.c:317:9,
> > inlined from ‘mlx4_cq_alloc’ at drivers/net/ethernet/mellanox/mlx4/cq.c:394:10:
> > ./include/linux/thread_info.h:228:4: error: call to ‘__bad_copy_from’ declared with attribute error: copy source size is too small
> > 228 | __bad_copy_from();
> > | ^~~~~~~~~~~~~~~~~
> > make[6]: *** [scripts/Makefile.build:250：drivers/net/ethernet/mellanox/mlx4/cq.o] 错误 1
> > make[5]: *** [scripts/Makefile.build:500：drivers/net/ethernet/mellanox/mlx4] 错误 2
> > make[5]: *** 正在等待未完成的任务....
> > make[4]: *** [scripts/Makefile.build:500：drivers/net/ethernet/mellanox] 错误 2
> > make[3]: *** [scripts/Makefile.build:500：drivers/net/ethernet] 错误 2
> > make[3]: *** 正在等待未完成的任务....
> > make[2]: *** [scripts/Makefile.build:500：drivers/net] 错误 2
> > make[2]: *** 正在等待未完成的任务....
> > make[1]: *** [scripts/Makefile.build:500：drivers] 错误 2
> > make: *** [Makefile:1992：.] 错误 2
> >
> > Signed-off-by: Yupeng Li <[email protected]>
> > Reviewed-by: Caicai <[email protected]>
> > ---
> > drivers/net/ethernet/mellanox/mlx4/cq.c | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/drivers/net/ethernet/mellanox/mlx4/cq.c b/drivers/net/ethernet/mellanox/mlx4/cq.c
> > index 4d4f9cf9facb..7dadd7227480 100644
> > --- a/drivers/net/ethernet/mellanox/mlx4/cq.c
> > +++ b/drivers/net/ethernet/mellanox/mlx4/cq.c
> > @@ -315,7 +315,11 @@ static int mlx4_init_user_cqes(void *buf, int entries, int cqe_size)
> > }
> > } else {
> > err = copy_to_user((void __user *)buf, init_ents,
> > +#ifdef CONFIG_64BIT
> > array_size(entries, cqe_size)) ?
> > +#else
> > + entries * cqe_size) ?
> > +#endif
> > -EFAULT : 0;
>
> This can't possibly make sense, Kees?
Uuuuh, that's really weird. What compiler version and arch? I'll see if
I can reproduce this.
--
Kees Cook
On Fri, Jan 13, 2023 at 10:41:01AM -0800, Kees Cook wrote:
> On Mon, Jan 09, 2023 at 09:51:18AM -0400, Jason Gunthorpe wrote:
> > On Sat, Jan 07, 2023 at 03:27:25PM +0800, Yupeng Li wrote:
> > > When CONFIG_64BIT was disabled, check_copy_size() was declared with
> > > attribute error: copy source size is too small, array_size() for 32BIT
> > > was wrong size, some compiled msg with error like:
> > >
> > > CALL scripts/checksyscalls.sh
> > > CC [M] drivers/net/ethernet/mellanox/mlx4/cq.o
> > > In file included from ./arch/x86/include/asm/preempt.h:7,
> > > from ./include/linux/preempt.h:78,
> > > from ./include/linux/percpu.h:6,
> > > from ./include/linux/context_tracking_state.h:5,
> > > from ./include/linux/hardirq.h:5,
> > > from drivers/net/ethernet/mellanox/mlx4/cq.c:37:
> > > In function ‘check_copy_size’,
> > > inlined from ‘copy_to_user’ at ./include/linux/uaccess.h:168:6,
> > > inlined from ‘mlx4_init_user_cqes’ at drivers/net/ethernet/mellanox/mlx4/cq.c:317:9,
> > > inlined from ‘mlx4_cq_alloc’ at drivers/net/ethernet/mellanox/mlx4/cq.c:394:10:
> > > ./include/linux/thread_info.h:228:4: error: call to ‘__bad_copy_from’ declared with attribute error: copy source size is too small
> > > 228 | __bad_copy_from();
> > > | ^~~~~~~~~~~~~~~~~
> > > make[6]: *** [scripts/Makefile.build:250：drivers/net/ethernet/mellanox/mlx4/cq.o] 错误 1
> > > make[5]: *** [scripts/Makefile.build:500：drivers/net/ethernet/mellanox/mlx4] 错误 2
> > > make[5]: *** 正在等待未完成的任务....
> > > make[4]: *** [scripts/Makefile.build:500：drivers/net/ethernet/mellanox] 错误 2
> > > make[3]: *** [scripts/Makefile.build:500：drivers/net/ethernet] 错误 2
> > > make[3]: *** 正在等待未完成的任务....
> > > make[2]: *** [scripts/Makefile.build:500：drivers/net] 错误 2
> > > make[2]: *** 正在等待未完成的任务....
> > > make[1]: *** [scripts/Makefile.build:500：drivers] 错误 2
> > > make: *** [Makefile:1992：.] 错误 2
> > >
> > > Signed-off-by: Yupeng Li <[email protected]>
> > > Reviewed-by: Caicai <[email protected]>
> > > ---
> > > drivers/net/ethernet/mellanox/mlx4/cq.c | 4 ++++
> > > 1 file changed, 4 insertions(+)
> > >
> > > diff --git a/drivers/net/ethernet/mellanox/mlx4/cq.c b/drivers/net/ethernet/mellanox/mlx4/cq.c
> > > index 4d4f9cf9facb..7dadd7227480 100644
> > > --- a/drivers/net/ethernet/mellanox/mlx4/cq.c
> > > +++ b/drivers/net/ethernet/mellanox/mlx4/cq.c
> > > @@ -315,7 +315,11 @@ static int mlx4_init_user_cqes(void *buf, int entries, int cqe_size)
> > > }
> > > } else {
> > > err = copy_to_user((void __user *)buf, init_ents,
> > > +#ifdef CONFIG_64BIT
> > > array_size(entries, cqe_size)) ?
> > > +#else
> > > + entries * cqe_size) ?
> > > +#endif
> > > -EFAULT : 0;
> >
> > This can't possibly make sense, Kees?
>
> Uuuuh, that's really weird. What compiler version and arch? I'll see if
> I can reproduce this.
I can't reproduce this. I'm assuming this is being seen on a 32-bit
loongarch build? I have no idea how to get that compiler. Neither Debian
nor Fedora seem to package it. (It looks like it was added in GCC 12?)
Perhaps it's just "mips"? But I also can't figure out how to choose a
32-bit mips build. Wheee.
Anyway, I would assume this is a compiler bug around inlining or the
check_mul_overflow implementation?
static inline size_t __must_check size_mul(size_t factor1, size_t factor2)
{
size_t bytes;
if (check_mul_overflow(factor1, factor2, &bytes))
return SIZE_MAX;
return bytes;
}
#define array_size(a, b) size_mul(a, b)
-Kees
--
Kees Cook
On Sun, Jan 15, 2023 at 07:53:34PM +0800, caizp2008 wrote:
> my kernel config is config-mlx4-error.
Where can I find this config?
--
Kees Cook