* fix u32 printf specifier
@ 2021-06-02 15:23 Benedict Schlueter
2021-06-02 17:41 ` Martin KaFai Lau
0 siblings, 1 reply; 5+ messages in thread
From: Benedict Schlueter @ 2021-06-02 15:23 UTC (permalink / raw)
To: bpf; +Cc: benedict.schlueter
Hi,
I assume its clear what this patch does.
From 9618e4475b812651c3fe481af885757675fc4ae2 Mon Sep 17 00:00:00 2001
From: Benedict Schlueter <benedict.schlueter@rub.de>
Date: Wed, 2 Jun 2021 17:16:13 +0200
Subject: use correct format string specifier for unsigned 32 Bit
bounds print statements
Signed-off-by: Benedict Schlueter <benedict.schlueter@rub.de>
---
kernel/bpf/verifier.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 1de4b8c6ee42..e107996c7220 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -690,11 +690,11 @@ static void print_verifier_state(struct
bpf_verifier_env *env,
(int)(reg->s32_max_value));
if (reg->u32_min_value != reg->umin_value &&
reg->u32_min_value != U32_MIN)
- verbose(env, ",u32_min_value=%d",
+ verbose(env, ",u32_min_value=%u",
(int)(reg->u32_min_value));
if (reg->u32_max_value != reg->umax_value &&
reg->u32_max_value != U32_MAX)
- verbose(env, ",u32_max_value=%d",
+ verbose(env, ",u32_max_value=%u",
(int)(reg->u32_max_value));
}
verbose(env, ")");
--
2.31.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: fix u32 printf specifier
2021-06-02 15:23 fix u32 printf specifier Benedict Schlueter
@ 2021-06-02 17:41 ` Martin KaFai Lau
2021-06-02 22:41 ` Benedict Schlueter
0 siblings, 1 reply; 5+ messages in thread
From: Martin KaFai Lau @ 2021-06-02 17:41 UTC (permalink / raw)
To: Benedict Schlueter; +Cc: bpf, benedict.schlueter
On Wed, Jun 02, 2021 at 05:23:19PM +0200, Benedict Schlueter wrote:
> Hi,
>
> I assume its clear what this patch does.
>
>
> From 9618e4475b812651c3fe481af885757675fc4ae2 Mon Sep 17 00:00:00 2001
> From: Benedict Schlueter <benedict.schlueter@rub.de>
> Date: Wed, 2 Jun 2021 17:16:13 +0200
> Subject: use correct format string specifier for unsigned 32 Bit
> bounds print statements
>
> Signed-off-by: Benedict Schlueter <benedict.schlueter@rub.de>
> ---
> kernel/bpf/verifier.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
> index 1de4b8c6ee42..e107996c7220 100644
> --- a/kernel/bpf/verifier.c
> +++ b/kernel/bpf/verifier.c
> @@ -690,11 +690,11 @@ static void print_verifier_state(struct
> bpf_verifier_env *env,
> (int)(reg->s32_max_value));
> if (reg->u32_min_value != reg->umin_value &&
> reg->u32_min_value != U32_MIN)
> - verbose(env, ",u32_min_value=%d",
> + verbose(env, ",u32_min_value=%u",
> (int)(reg->u32_min_value));
"%u" and (int) cast don't make sense.
It needs a proper commit message to explain why the change is needed
and also a Fixes tag. Please refer to Documentation/bpf/bpf_devel_QA.rst.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: fix u32 printf specifier
2021-06-02 17:41 ` Martin KaFai Lau
@ 2021-06-02 22:41 ` Benedict Schlueter
2021-06-03 23:58 ` Alexei Starovoitov
2021-06-04 6:27 ` Martin KaFai Lau
0 siblings, 2 replies; 5+ messages in thread
From: Benedict Schlueter @ 2021-06-02 22:41 UTC (permalink / raw)
To: Martin KaFai Lau; +Cc: bpf, benedict.schlueter
On 02/06/2021 19:41, Martin KaFai Lau wrote:
> On Wed, Jun 02, 2021 at 05:23:19PM +0200, Benedict Schlueter wrote:
>> Hi,
>>
>> I assume its clear what this patch does.
>>
>>
>> From 9618e4475b812651c3fe481af885757675fc4ae2 Mon Sep 17 00:00:00 2001
>> From: Benedict Schlueter <benedict.schlueter@rub.de>
>> Date: Wed, 2 Jun 2021 17:16:13 +0200
>> Subject: use correct format string specifier for unsigned 32 Bit
>> bounds print statements
>>
>> Signed-off-by: Benedict Schlueter <benedict.schlueter@rub.de>
>> ---
>> kernel/bpf/verifier.c | 4 ++--
>> 1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
>> index 1de4b8c6ee42..e107996c7220 100644
>> --- a/kernel/bpf/verifier.c
>> +++ b/kernel/bpf/verifier.c
>> @@ -690,11 +690,11 @@ static void print_verifier_state(struct
>> bpf_verifier_env *env,
>> (int)(reg->s32_max_value));
>> if (reg->u32_min_value != reg->umin_value &&
>> reg->u32_min_value != U32_MIN)
>> - verbose(env, ",u32_min_value=%d",
>> + verbose(env, ",u32_min_value=%u",
>> (int)(reg->u32_min_value));
> "%u" and (int) cast don't make sense.
Yep, changed to unsigned int for consistency with the other cases. Is
this necessary? Since reg->u32_min_value is already a unsigned 32 bit
number.
> It needs a proper commit message to explain why the change is needed
> and also a Fixes tag. Please refer to Documentation/bpf/bpf_devel_QA.rst.
Sorry should have read this more carefully before. Everything should be
included right now.
From fd076dc5f2bd5ec4e9cb49530e77cf2d3e4f42c2 Mon Sep 17 00:00:00 2001
From: Benedict Schlueter <benedict.schlueter@rub.de>
Date: Wed, 2 Jun 2021 21:42:39 +0200
Subject: [PATCH bpf-next]
use correct format string specifier for unsigned 32 bounds
when printing an unsigned value, it should be a positive number
verifier log before the patch
([...],s32_max_value=-2,u32_min_value=-16,u32_max_value=-2)
verifier log after the patch
([...],s32_max_value=-2,u32_min_value=4294967280,u32_max_value=4294967294)
fixes 3f50f132d840 (bpf: Verifier, do explicit ALU32 bounds tracking)
Signed-off-by: Benedict Schlueter <benedict.schlueter@rub.de>
---
kernel/bpf/verifier.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 1de4b8c6ee42..ea482ebaeb26 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -690,12 +690,12 @@ static void print_verifier_state(struct
bpf_verifier_env *env,
(int)(reg->s32_max_value));
if (reg->u32_min_value != reg->umin_value &&
reg->u32_min_value != U32_MIN)
- verbose(env, ",u32_min_value=%d",
- (int)(reg->u32_min_value));
+ verbose(env, ",u32_min_value=%u",
+ (unsigned int)(reg->u32_min_value));
if (reg->u32_max_value != reg->umax_value &&
reg->u32_max_value != U32_MAX)
- verbose(env, ",u32_max_value=%d",
- (int)(reg->u32_max_value));
+ verbose(env, ",u32_max_value=%u",
+ (unsigned int)(reg->u32_max_value));
}
verbose(env, ")");
}
--
2.31.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: fix u32 printf specifier
2021-06-02 22:41 ` Benedict Schlueter
@ 2021-06-03 23:58 ` Alexei Starovoitov
2021-06-04 6:27 ` Martin KaFai Lau
1 sibling, 0 replies; 5+ messages in thread
From: Alexei Starovoitov @ 2021-06-03 23:58 UTC (permalink / raw)
To: Benedict Schlueter; +Cc: Martin KaFai Lau, bpf, benedict.schlueter
On Wed, Jun 2, 2021 at 3:43 PM Benedict Schlueter
<Benedict.Schlueter@rub.de> wrote:
>
> On 02/06/2021 19:41, Martin KaFai Lau wrote:
>
> > On Wed, Jun 02, 2021 at 05:23:19PM +0200, Benedict Schlueter wrote:
> >> Hi,
> >>
> >> I assume its clear what this patch does.
> >>
> >>
> >> From 9618e4475b812651c3fe481af885757675fc4ae2 Mon Sep 17 00:00:00 2001
> >> From: Benedict Schlueter <benedict.schlueter@rub.de>
> >> Date: Wed, 2 Jun 2021 17:16:13 +0200
> >> Subject: use correct format string specifier for unsigned 32 Bit
> >> bounds print statements
> >>
> >> Signed-off-by: Benedict Schlueter <benedict.schlueter@rub.de>
> >> ---
> >> kernel/bpf/verifier.c | 4 ++--
> >> 1 file changed, 2 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
> >> index 1de4b8c6ee42..e107996c7220 100644
> >> --- a/kernel/bpf/verifier.c
> >> +++ b/kernel/bpf/verifier.c
> >> @@ -690,11 +690,11 @@ static void print_verifier_state(struct
> >> bpf_verifier_env *env,
> >> (int)(reg->s32_max_value));
> >> if (reg->u32_min_value != reg->umin_value &&
> >> reg->u32_min_value != U32_MIN)
> >> - verbose(env, ",u32_min_value=%d",
> >> + verbose(env, ",u32_min_value=%u",
> >> (int)(reg->u32_min_value));
> > "%u" and (int) cast don't make sense.
> Yep, changed to unsigned int for consistency with the other cases. Is
> this necessary? Since reg->u32_min_value is already a unsigned 32 bit
> number.
> > It needs a proper commit message to explain why the change is needed
> > and also a Fixes tag. Please refer to Documentation/bpf/bpf_devel_QA.rst.
>
> Sorry should have read this more carefully before. Everything should be
> included right now.
>
> From fd076dc5f2bd5ec4e9cb49530e77cf2d3e4f42c2 Mon Sep 17 00:00:00 2001
> From: Benedict Schlueter <benedict.schlueter@rub.de>
> Date: Wed, 2 Jun 2021 21:42:39 +0200
> Subject: [PATCH bpf-next]
> use correct format string specifier for unsigned 32 bounds
Please resubmit the patch.
See 'Submitting patches' in Documentation/bpf/bpf_devel_QA.rst
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: fix u32 printf specifier
2021-06-02 22:41 ` Benedict Schlueter
2021-06-03 23:58 ` Alexei Starovoitov
@ 2021-06-04 6:27 ` Martin KaFai Lau
1 sibling, 0 replies; 5+ messages in thread
From: Martin KaFai Lau @ 2021-06-04 6:27 UTC (permalink / raw)
To: Benedict Schlueter; +Cc: bpf, benedict.schlueter
On Thu, Jun 03, 2021 at 12:41:57AM +0200, Benedict Schlueter wrote:
> On 02/06/2021 19:41, Martin KaFai Lau wrote:
>
> > On Wed, Jun 02, 2021 at 05:23:19PM +0200, Benedict Schlueter wrote:
> > > Hi,
> > >
> > > I assume its clear what this patch does.
> > >
> > >
> > > From 9618e4475b812651c3fe481af885757675fc4ae2 Mon Sep 17 00:00:00 2001
> > > From: Benedict Schlueter <benedict.schlueter@rub.de>
> > > Date: Wed, 2 Jun 2021 17:16:13 +0200
> > > Subject: use correct format string specifier for unsigned 32 Bit
> > > bounds print statements
> > >
> > > Signed-off-by: Benedict Schlueter <benedict.schlueter@rub.de>
> > > ---
> > > kernel/bpf/verifier.c | 4 ++--
> > > 1 file changed, 2 insertions(+), 2 deletions(-)
> > >
> > > diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
> > > index 1de4b8c6ee42..e107996c7220 100644
> > > --- a/kernel/bpf/verifier.c
> > > +++ b/kernel/bpf/verifier.c
> > > @@ -690,11 +690,11 @@ static void print_verifier_state(struct
> > > bpf_verifier_env *env,
> > > (int)(reg->s32_max_value));
> > > if (reg->u32_min_value != reg->umin_value &&
> > > reg->u32_min_value != U32_MIN)
> > > - verbose(env, ",u32_min_value=%d",
> > > + verbose(env, ",u32_min_value=%u",
> > > (int)(reg->u32_min_value));
> > "%u" and (int) cast don't make sense.
> Yep, changed to unsigned int for consistency with the other cases. Is this
> necessary? Since reg->u32_min_value is already a unsigned 32 bit number.
cast is unnecessary.
> > It needs a proper commit message to explain why the change is needed
> > and also a Fixes tag. Please refer to Documentation/bpf/bpf_devel_QA.rst.
>
> Sorry should have read this more carefully before. Everything should be
> included right now.
>
> From fd076dc5f2bd5ec4e9cb49530e77cf2d3e4f42c2 Mon Sep 17 00:00:00 2001
> From: Benedict Schlueter <benedict.schlueter@rub.de>
> Date: Wed, 2 Jun 2021 21:42:39 +0200
> Subject: [PATCH bpf-next]
> use correct format string specifier for unsigned 32 bounds
>
> when printing an unsigned value, it should be a positive number
>
> verifier log before the patch
> ([...],s32_max_value=-2,u32_min_value=-16,u32_max_value=-2)
>
> verifier log after the patch
> ([...],s32_max_value=-2,u32_min_value=4294967280,u32_max_value=4294967294)
>
>
> fixes 3f50f132d840 (bpf: Verifier, do explicit ALU32 bounds tracking)
Fixes: 3f50f132d840 ("bpf: Verifier, do explicit ALU32 bounds tracking")
which can be obtained by:
git log -1 --format='Fixes: %h ("%s")' 3f50f132d840
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2021-06-04 6:27 UTC | newest]
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2021-06-02 15:23 fix u32 printf specifier Benedict Schlueter
2021-06-02 17:41 ` Martin KaFai Lau
2021-06-02 22:41 ` Benedict Schlueter
2021-06-03 23:58 ` Alexei Starovoitov
2021-06-04 6:27 ` Martin KaFai Lau
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