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* [Bug time/26833] New: adjtime() with delta == NULL segfaults on armv7 32bit platform
@ 2020-11-02 17:14 matthias.gerstner at nefkom dot net
2020-11-02 17:24 ` [Bug time/26833] " adhemerval.zanella at linaro dot org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: matthias.gerstner at nefkom dot net @ 2020-11-02 17:14 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=26833
Bug ID: 26833
Summary: adjtime() with delta == NULL segfaults on armv7 32bit
platform
Product: glibc
Version: 2.32
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: time
Assignee: unassigned at sourceware dot org
Reporter: matthias.gerstner at nefkom dot net
Target Milestone: ---
I recently updated glibc from release 2.31 to release 2.32 on Gentoo Linux
running on a 32-bit armv7 machine. Ever since that the ntpd from openntpd
doesn't startup any more.
Digging deeper I found that the forked 'ntp_main' instance of ntpd dies with a
SIGSEGV when executing the the adjtime() glibc function call in the following
function:
```
double
getoffset(void)
{
struct timeval tv;
>>>> if (adjtime(NULL, &tv) == -1)
return (0.0);
return (tv.tv_sec + 1.0e-6 * tv.tv_usec);
}
```
The issue seems to stem from glibc git commit
0308077e3a4ff1c123cdddd311f55a2ecdd3115c where the newly introduced __adjtime
32-bit wrapper cannot handle a NULL pointer itv input parameter.
```
+#if __TIMESIZE != 64
+libc_hidden_def (__adjtime64)
+
+int
+__adjtime (const struct timeval *itv, struct timeval *otv)
+{
+ struct __timeval64 itv64, otv64;
+ int retval;
+
+ itv64 = valid_timeval_to_timeval64 (*itv);
+ retval = __adjtime64 (&itv64, otv != NULL ? &otv64 : NULL);
+ if (otv != NULL)
+ *otv = valid_timeval64_to_timeval (otv64);
+
+ return retval;
+}
+#endif
```
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* [Bug time/26833] adjtime() with delta == NULL segfaults on armv7 32bit platform
2020-11-02 17:14 [Bug time/26833] New: adjtime() with delta == NULL segfaults on armv7 32bit platform matthias.gerstner at nefkom dot net
@ 2020-11-02 17:24 ` adhemerval.zanella at linaro dot org
2020-11-09 14:20 ` adhemerval.zanella at linaro dot org
2020-11-10 12:20 ` fweimer at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: adhemerval.zanella at linaro dot org @ 2020-11-02 17:24 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=26833
Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |adhemerval.zanella at linaro dot o
| |rg
Assignee|unassigned at sourceware dot org |adhemerval.zanella at linaro dot o
| |rg
Ever confirmed|0 |1
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2020-11-02
--- Comment #1 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
This seems a regression of BZ#2449 from the y2038 support.
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* [Bug time/26833] adjtime() with delta == NULL segfaults on armv7 32bit platform
2020-11-02 17:14 [Bug time/26833] New: adjtime() with delta == NULL segfaults on armv7 32bit platform matthias.gerstner at nefkom dot net
2020-11-02 17:24 ` [Bug time/26833] " adhemerval.zanella at linaro dot org
@ 2020-11-09 14:20 ` adhemerval.zanella at linaro dot org
2020-11-10 12:20 ` fweimer at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: adhemerval.zanella at linaro dot org @ 2020-11-09 14:20 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=26833
Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Target Milestone|--- |2.33
Resolution|--- |NOTABUG
--- Comment #2 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
Fixed on 2.33.
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* [Bug time/26833] adjtime() with delta == NULL segfaults on armv7 32bit platform
2020-11-02 17:14 [Bug time/26833] New: adjtime() with delta == NULL segfaults on armv7 32bit platform matthias.gerstner at nefkom dot net
2020-11-02 17:24 ` [Bug time/26833] " adhemerval.zanella at linaro dot org
2020-11-09 14:20 ` adhemerval.zanella at linaro dot org
@ 2020-11-10 12:20 ` fweimer at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: fweimer at redhat dot com @ 2020-11-10 12:20 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=26833
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fweimer at redhat dot com
Resolution|NOTABUG |FIXED
--- Comment #3 from Florian Weimer <fweimer at redhat dot com> ---
Note: Order of the Resolution drop-down list changed. NOTABUG is now first.
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2020-11-02 17:14 [Bug time/26833] New: adjtime() with delta == NULL segfaults on armv7 32bit platform matthias.gerstner at nefkom dot net
2020-11-02 17:24 ` [Bug time/26833] " adhemerval.zanella at linaro dot org
2020-11-09 14:20 ` adhemerval.zanella at linaro dot org
2020-11-10 12:20 ` fweimer at redhat dot com
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