* [PATCH 1/2] sandbox: fix signed integer overflow
@ 2020-02-03 8:27 Ahmad Fatoum
2020-02-03 8:27 ` [PATCH 2/2] sandbox: hostfile: fix UB-inducing shift Ahmad Fatoum
2020-02-10 8:09 ` [PATCH 1/2] sandbox: fix signed integer overflow Sascha Hauer
0 siblings, 2 replies; 3+ messages in thread
From: Ahmad Fatoum @ 2020-02-03 8:27 UTC (permalink / raw)
To: barebox
On a 32-bit host system, UBSan reports:
===============================================================
UBSAN: Undefined behaviour in ./arch/sandbox/os/common.c:115:32
signed integer overflow:
83598 * 1000000000 cannot be represented in type 'long int'
===============================================================
Fix this.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
---
arch/sandbox/os/common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sandbox/os/common.c b/arch/sandbox/os/common.c
index 3ad12b4a30cd..3f9cc70770f6 100644
--- a/arch/sandbox/os/common.c
+++ b/arch/sandbox/os/common.c
@@ -112,7 +112,7 @@ uint64_t linux_get_time(void)
clock_gettime(CLOCK_MONOTONIC, &ts);
- now = ts.tv_sec * 1000 * 1000 * 1000 + ts.tv_nsec;
+ now = ts.tv_sec * 1000ULL * 1000 * 1000 + ts.tv_nsec;
return now;
}
--
2.20.1
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^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH 2/2] sandbox: hostfile: fix UB-inducing shift
2020-02-03 8:27 [PATCH 1/2] sandbox: fix signed integer overflow Ahmad Fatoum
@ 2020-02-03 8:27 ` Ahmad Fatoum
2020-02-10 8:09 ` [PATCH 1/2] sandbox: fix signed integer overflow Sascha Hauer
1 sibling, 0 replies; 3+ messages in thread
From: Ahmad Fatoum @ 2020-02-03 8:27 UTC (permalink / raw)
To: barebox
On 32-bit hosts, UBSan reports:
====================================================================
UBSAN: Undefined behaviour in ./arch/sandbox/board/hostfile.c:135:12
shift exponent 32 is too large for 32-bit type 'long unsigned int'
====================================================================
Fix this by using a unsigned long long for base. The upper 32-bit
won't be set, but device tree fixups can now read them.
Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
---
arch/sandbox/mach-sandbox/include/mach/hostfile.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/sandbox/mach-sandbox/include/mach/hostfile.h b/arch/sandbox/mach-sandbox/include/mach/hostfile.h
index 627fe28e765b..54f690be5f7f 100644
--- a/arch/sandbox/mach-sandbox/include/mach/hostfile.h
+++ b/arch/sandbox/mach-sandbox/include/mach/hostfile.h
@@ -3,7 +3,7 @@
struct hf_info {
int fd;
- unsigned long base;
+ unsigned long long base;
size_t size;
const char *devname;
const char *filename;
--
2.20.1
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH 1/2] sandbox: fix signed integer overflow
2020-02-03 8:27 [PATCH 1/2] sandbox: fix signed integer overflow Ahmad Fatoum
2020-02-03 8:27 ` [PATCH 2/2] sandbox: hostfile: fix UB-inducing shift Ahmad Fatoum
@ 2020-02-10 8:09 ` Sascha Hauer
1 sibling, 0 replies; 3+ messages in thread
From: Sascha Hauer @ 2020-02-10 8:09 UTC (permalink / raw)
To: Ahmad Fatoum; +Cc: barebox
On Mon, Feb 03, 2020 at 09:27:58AM +0100, Ahmad Fatoum wrote:
> On a 32-bit host system, UBSan reports:
>
> ===============================================================
> UBSAN: Undefined behaviour in ./arch/sandbox/os/common.c:115:32
> signed integer overflow:
> 83598 * 1000000000 cannot be represented in type 'long int'
> ===============================================================
>
> Fix this.
>
> Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
> ---
> arch/sandbox/os/common.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Applied, thanks
Sascha
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