* [PATCH v1] perf cap: Add __NR_capget to arch/x86 unistd
@ 2024-10-26 5:54 Ian Rogers
2024-10-26 6:00 ` Ian Rogers
0 siblings, 1 reply; 4+ messages in thread
From: Ian Rogers @ 2024-10-26 5:54 UTC (permalink / raw)
To: Adrian Hunter
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Namhyung Kim, Mark Rutland, Alexander Shishkin, Jiri Olsa,
Ian Rogers, Kan Liang, linux-kernel, linux-perf-users
As there are duplicated kernel headers in tools/include libc can pick
up the wrong definitions. This was causing the wrong system call for
capget in perf.
Closes: https://lore.kernel.org/lkml/cc7d6bdf-1aeb-4179-9029-4baf50b59342@intel.com/
Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/arch/x86/include/uapi/asm/unistd_32.h | 3 +++
tools/arch/x86/include/uapi/asm/unistd_64.h | 3 +++
tools/perf/util/cap.c | 10 +++-------
3 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/tools/arch/x86/include/uapi/asm/unistd_32.h b/tools/arch/x86/include/uapi/asm/unistd_32.h
index 9de35df1afc3..63182a023e9d 100644
--- a/tools/arch/x86/include/uapi/asm/unistd_32.h
+++ b/tools/arch/x86/include/uapi/asm/unistd_32.h
@@ -11,6 +11,9 @@
#ifndef __NR_getpgid
#define __NR_getpgid 132
#endif
+#ifndef __NR_capget
+#define __NR_capget 184
+#endif
#ifndef __NR_gettid
#define __NR_gettid 224
#endif
diff --git a/tools/arch/x86/include/uapi/asm/unistd_64.h b/tools/arch/x86/include/uapi/asm/unistd_64.h
index d0f2043d7132..77311e8d1b5d 100644
--- a/tools/arch/x86/include/uapi/asm/unistd_64.h
+++ b/tools/arch/x86/include/uapi/asm/unistd_64.h
@@ -11,6 +11,9 @@
#ifndef __NR_getpgid
#define __NR_getpgid 121
#endif
+#ifndef __NR_capget
+#define __NR_capget 125
+#endif
#ifndef __NR_gettid
#define __NR_gettid 186
#endif
diff --git a/tools/perf/util/cap.c b/tools/perf/util/cap.c
index 7574a67651bc..69d9a2bcd40b 100644
--- a/tools/perf/util/cap.c
+++ b/tools/perf/util/cap.c
@@ -7,13 +7,9 @@
#include "debug.h"
#include <errno.h>
#include <string.h>
-#include <unistd.h>
#include <linux/capability.h>
#include <sys/syscall.h>
-
-#ifndef SYS_capget
-#define SYS_capget 90
-#endif
+#include <unistd.h>
#define MAX_LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_3
@@ -21,9 +17,9 @@ bool perf_cap__capable(int cap, bool *used_root)
{
struct __user_cap_header_struct header = {
.version = _LINUX_CAPABILITY_VERSION_3,
- .pid = getpid(),
+ .pid = 0,
};
- struct __user_cap_data_struct data[MAX_LINUX_CAPABILITY_U32S];
+ struct __user_cap_data_struct data[MAX_LINUX_CAPABILITY_U32S] = {};
__u32 cap_val;
*used_root = false;
--
2.47.0.163.g1226f6d8fa-goog
^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [PATCH v1] perf cap: Add __NR_capget to arch/x86 unistd
2024-10-26 5:54 [PATCH v1] perf cap: Add __NR_capget to arch/x86 unistd Ian Rogers
@ 2024-10-26 6:00 ` Ian Rogers
2024-10-28 7:25 ` Adrian Hunter
0 siblings, 1 reply; 4+ messages in thread
From: Ian Rogers @ 2024-10-26 6:00 UTC (permalink / raw)
To: Adrian Hunter
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Namhyung Kim, Mark Rutland, Alexander Shishkin, Jiri Olsa,
Kan Liang, linux-kernel, linux-perf-users
On Fri, Oct 25, 2024 at 10:54 PM Ian Rogers <irogers@google.com> wrote:
>
> As there are duplicated kernel headers in tools/include libc can pick
> up the wrong definitions. This was causing the wrong system call for
> capget in perf.
>
> Closes: https://lore.kernel.org/lkml/cc7d6bdf-1aeb-4179-9029-4baf50b59342@intel.com/
> Signed-off-by: Ian Rogers <irogers@google.com>
Forgot:
Fixes: e25ebda78e23 ("perf cap: Tidy up and improve capability testing")
Thanks,
Ian
> ---
> tools/arch/x86/include/uapi/asm/unistd_32.h | 3 +++
> tools/arch/x86/include/uapi/asm/unistd_64.h | 3 +++
> tools/perf/util/cap.c | 10 +++-------
> 3 files changed, 9 insertions(+), 7 deletions(-)
>
> diff --git a/tools/arch/x86/include/uapi/asm/unistd_32.h b/tools/arch/x86/include/uapi/asm/unistd_32.h
> index 9de35df1afc3..63182a023e9d 100644
> --- a/tools/arch/x86/include/uapi/asm/unistd_32.h
> +++ b/tools/arch/x86/include/uapi/asm/unistd_32.h
> @@ -11,6 +11,9 @@
> #ifndef __NR_getpgid
> #define __NR_getpgid 132
> #endif
> +#ifndef __NR_capget
> +#define __NR_capget 184
> +#endif
> #ifndef __NR_gettid
> #define __NR_gettid 224
> #endif
> diff --git a/tools/arch/x86/include/uapi/asm/unistd_64.h b/tools/arch/x86/include/uapi/asm/unistd_64.h
> index d0f2043d7132..77311e8d1b5d 100644
> --- a/tools/arch/x86/include/uapi/asm/unistd_64.h
> +++ b/tools/arch/x86/include/uapi/asm/unistd_64.h
> @@ -11,6 +11,9 @@
> #ifndef __NR_getpgid
> #define __NR_getpgid 121
> #endif
> +#ifndef __NR_capget
> +#define __NR_capget 125
> +#endif
> #ifndef __NR_gettid
> #define __NR_gettid 186
> #endif
> diff --git a/tools/perf/util/cap.c b/tools/perf/util/cap.c
> index 7574a67651bc..69d9a2bcd40b 100644
> --- a/tools/perf/util/cap.c
> +++ b/tools/perf/util/cap.c
> @@ -7,13 +7,9 @@
> #include "debug.h"
> #include <errno.h>
> #include <string.h>
> -#include <unistd.h>
> #include <linux/capability.h>
> #include <sys/syscall.h>
> -
> -#ifndef SYS_capget
> -#define SYS_capget 90
> -#endif
> +#include <unistd.h>
>
> #define MAX_LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_3
>
> @@ -21,9 +17,9 @@ bool perf_cap__capable(int cap, bool *used_root)
> {
> struct __user_cap_header_struct header = {
> .version = _LINUX_CAPABILITY_VERSION_3,
> - .pid = getpid(),
> + .pid = 0,
> };
> - struct __user_cap_data_struct data[MAX_LINUX_CAPABILITY_U32S];
> + struct __user_cap_data_struct data[MAX_LINUX_CAPABILITY_U32S] = {};
> __u32 cap_val;
>
> *used_root = false;
> --
> 2.47.0.163.g1226f6d8fa-goog
>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH v1] perf cap: Add __NR_capget to arch/x86 unistd
2024-10-26 6:00 ` Ian Rogers
@ 2024-10-28 7:25 ` Adrian Hunter
2024-10-28 16:08 ` Arnaldo Carvalho de Melo
0 siblings, 1 reply; 4+ messages in thread
From: Adrian Hunter @ 2024-10-28 7:25 UTC (permalink / raw)
To: Ian Rogers
Cc: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Namhyung Kim, Mark Rutland, Alexander Shishkin, Jiri Olsa,
Kan Liang, linux-kernel, linux-perf-users
On 26/10/24 09:00, Ian Rogers wrote:
> On Fri, Oct 25, 2024 at 10:54 PM Ian Rogers <irogers@google.com> wrote:
>>
>> As there are duplicated kernel headers in tools/include libc can pick
>> up the wrong definitions. This was causing the wrong system call for
>> capget in perf.
>>
>> Closes: https://lore.kernel.org/lkml/cc7d6bdf-1aeb-4179-9029-4baf50b59342@intel.com/
>> Signed-off-by: Ian Rogers <irogers@google.com>
>
> Forgot:
> Fixes: e25ebda78e23 ("perf cap: Tidy up and improve capability testing")
Works for me, thank you!
Tested-by: Adrian Hunter <adrian.hunter@intel.com>
>
> Thanks,
> Ian
>
>> ---
>> tools/arch/x86/include/uapi/asm/unistd_32.h | 3 +++
>> tools/arch/x86/include/uapi/asm/unistd_64.h | 3 +++
>> tools/perf/util/cap.c | 10 +++-------
>> 3 files changed, 9 insertions(+), 7 deletions(-)
>>
>> diff --git a/tools/arch/x86/include/uapi/asm/unistd_32.h b/tools/arch/x86/include/uapi/asm/unistd_32.h
>> index 9de35df1afc3..63182a023e9d 100644
>> --- a/tools/arch/x86/include/uapi/asm/unistd_32.h
>> +++ b/tools/arch/x86/include/uapi/asm/unistd_32.h
>> @@ -11,6 +11,9 @@
>> #ifndef __NR_getpgid
>> #define __NR_getpgid 132
>> #endif
>> +#ifndef __NR_capget
>> +#define __NR_capget 184
>> +#endif
>> #ifndef __NR_gettid
>> #define __NR_gettid 224
>> #endif
>> diff --git a/tools/arch/x86/include/uapi/asm/unistd_64.h b/tools/arch/x86/include/uapi/asm/unistd_64.h
>> index d0f2043d7132..77311e8d1b5d 100644
>> --- a/tools/arch/x86/include/uapi/asm/unistd_64.h
>> +++ b/tools/arch/x86/include/uapi/asm/unistd_64.h
>> @@ -11,6 +11,9 @@
>> #ifndef __NR_getpgid
>> #define __NR_getpgid 121
>> #endif
>> +#ifndef __NR_capget
>> +#define __NR_capget 125
>> +#endif
>> #ifndef __NR_gettid
>> #define __NR_gettid 186
>> #endif
>> diff --git a/tools/perf/util/cap.c b/tools/perf/util/cap.c
>> index 7574a67651bc..69d9a2bcd40b 100644
>> --- a/tools/perf/util/cap.c
>> +++ b/tools/perf/util/cap.c
>> @@ -7,13 +7,9 @@
>> #include "debug.h"
>> #include <errno.h>
>> #include <string.h>
>> -#include <unistd.h>
>> #include <linux/capability.h>
>> #include <sys/syscall.h>
>> -
>> -#ifndef SYS_capget
>> -#define SYS_capget 90
>> -#endif
>> +#include <unistd.h>
>>
>> #define MAX_LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_3
>>
>> @@ -21,9 +17,9 @@ bool perf_cap__capable(int cap, bool *used_root)
>> {
>> struct __user_cap_header_struct header = {
>> .version = _LINUX_CAPABILITY_VERSION_3,
>> - .pid = getpid(),
>> + .pid = 0,
>> };
>> - struct __user_cap_data_struct data[MAX_LINUX_CAPABILITY_U32S];
>> + struct __user_cap_data_struct data[MAX_LINUX_CAPABILITY_U32S] = {};
>> __u32 cap_val;
>>
>> *used_root = false;
>> --
>> 2.47.0.163.g1226f6d8fa-goog
>>
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [PATCH v1] perf cap: Add __NR_capget to arch/x86 unistd
2024-10-28 7:25 ` Adrian Hunter
@ 2024-10-28 16:08 ` Arnaldo Carvalho de Melo
0 siblings, 0 replies; 4+ messages in thread
From: Arnaldo Carvalho de Melo @ 2024-10-28 16:08 UTC (permalink / raw)
To: Adrian Hunter
Cc: Ian Rogers, Peter Zijlstra, Ingo Molnar, Namhyung Kim,
Mark Rutland, Alexander Shishkin, Jiri Olsa, Kan Liang,
linux-kernel, linux-perf-users
On Mon, Oct 28, 2024 at 09:25:36AM +0200, Adrian Hunter wrote:
> On 26/10/24 09:00, Ian Rogers wrote:
> > On Fri, Oct 25, 2024 at 10:54 PM Ian Rogers <irogers@google.com> wrote:
> >>
> >> As there are duplicated kernel headers in tools/include libc can pick
> >> up the wrong definitions. This was causing the wrong system call for
> >> capget in perf.
> >>
> >> Closes: https://lore.kernel.org/lkml/cc7d6bdf-1aeb-4179-9029-4baf50b59342@intel.com/
> >> Signed-off-by: Ian Rogers <irogers@google.com>
> >
> > Forgot:
> > Fixes: e25ebda78e23 ("perf cap: Tidy up and improve capability testing")
>
> Works for me, thank you!
>
> Tested-by: Adrian Hunter <adrian.hunter@intel.com>
Thanks, I also added this:
Reported-by: Adrian Hunter <adrian.hunter@intel.com>
Applied to perf-tools, for v6.12-rc.
- Arnaldo
> >
> > Thanks,
> > Ian
> >
> >> ---
> >> tools/arch/x86/include/uapi/asm/unistd_32.h | 3 +++
> >> tools/arch/x86/include/uapi/asm/unistd_64.h | 3 +++
> >> tools/perf/util/cap.c | 10 +++-------
> >> 3 files changed, 9 insertions(+), 7 deletions(-)
> >>
> >> diff --git a/tools/arch/x86/include/uapi/asm/unistd_32.h b/tools/arch/x86/include/uapi/asm/unistd_32.h
> >> index 9de35df1afc3..63182a023e9d 100644
> >> --- a/tools/arch/x86/include/uapi/asm/unistd_32.h
> >> +++ b/tools/arch/x86/include/uapi/asm/unistd_32.h
> >> @@ -11,6 +11,9 @@
> >> #ifndef __NR_getpgid
> >> #define __NR_getpgid 132
> >> #endif
> >> +#ifndef __NR_capget
> >> +#define __NR_capget 184
> >> +#endif
> >> #ifndef __NR_gettid
> >> #define __NR_gettid 224
> >> #endif
> >> diff --git a/tools/arch/x86/include/uapi/asm/unistd_64.h b/tools/arch/x86/include/uapi/asm/unistd_64.h
> >> index d0f2043d7132..77311e8d1b5d 100644
> >> --- a/tools/arch/x86/include/uapi/asm/unistd_64.h
> >> +++ b/tools/arch/x86/include/uapi/asm/unistd_64.h
> >> @@ -11,6 +11,9 @@
> >> #ifndef __NR_getpgid
> >> #define __NR_getpgid 121
> >> #endif
> >> +#ifndef __NR_capget
> >> +#define __NR_capget 125
> >> +#endif
> >> #ifndef __NR_gettid
> >> #define __NR_gettid 186
> >> #endif
> >> diff --git a/tools/perf/util/cap.c b/tools/perf/util/cap.c
> >> index 7574a67651bc..69d9a2bcd40b 100644
> >> --- a/tools/perf/util/cap.c
> >> +++ b/tools/perf/util/cap.c
> >> @@ -7,13 +7,9 @@
> >> #include "debug.h"
> >> #include <errno.h>
> >> #include <string.h>
> >> -#include <unistd.h>
> >> #include <linux/capability.h>
> >> #include <sys/syscall.h>
> >> -
> >> -#ifndef SYS_capget
> >> -#define SYS_capget 90
> >> -#endif
> >> +#include <unistd.h>
> >>
> >> #define MAX_LINUX_CAPABILITY_U32S _LINUX_CAPABILITY_U32S_3
> >>
> >> @@ -21,9 +17,9 @@ bool perf_cap__capable(int cap, bool *used_root)
> >> {
> >> struct __user_cap_header_struct header = {
> >> .version = _LINUX_CAPABILITY_VERSION_3,
> >> - .pid = getpid(),
> >> + .pid = 0,
> >> };
> >> - struct __user_cap_data_struct data[MAX_LINUX_CAPABILITY_U32S];
> >> + struct __user_cap_data_struct data[MAX_LINUX_CAPABILITY_U32S] = {};
> >> __u32 cap_val;
> >>
> >> *used_root = false;
> >> --
> >> 2.47.0.163.g1226f6d8fa-goog
> >>
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2024-10-28 16:08 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-10-26 5:54 [PATCH v1] perf cap: Add __NR_capget to arch/x86 unistd Ian Rogers
2024-10-26 6:00 ` Ian Rogers
2024-10-28 7:25 ` Adrian Hunter
2024-10-28 16:08 ` Arnaldo Carvalho de Melo
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.