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Bug 151262 - random user space segfaults with exec-shield-randomize
Summary: random user space segfaults with exec-shield-randomize
Keywords:
Status: CLOSED DUPLICATE of bug 154759
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: rawhide
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Dave Jones
QA Contact: Brian Brock
URL:
Whiteboard:
: 153271 (view as bug list)
Depends On:
Blocks: FC4Blocker
TreeView+ depends on / blocked
 
Reported: 2005-03-16 15:21 UTC by Harald Hoyer
Modified: 2015-01-04 22:17 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2005-05-08 01:50:13 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)

Description Harald Hoyer 2005-03-16 15:21:26 UTC 
$ uname -r
2.6.11-1.1177_FC4smp

ntpd randomly segfaults, compiled with the default RPM_OPT_FLAGS...
turning off exec-shield-randomize cures the segfaults

valgrind, efence do not show anything wrong..

a small test app:
int main(int argc, char **argv)
{
        return 0;
}

compiled with gcc4 and -fstack-check 
 gcc -O2 -Wall -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -m32 -march=i386 -mtune=pentium4
-g -DDEBUG -D_FORTIFYSOURCE=2 -Wall  -Wall -Wcast-qual -Wmissing-prototypes
-Wpointer-arith -Wshadow -Wstrict-prototypes -fstack-check -o main main.c

segfaults also randomly with exec-shield-randomize
Comment 1 Harald Hoyer 2005-03-16 15:22:21 UTC 
problem with gcc, glibc or kernel??
Comment 2 Harald Hoyer 2005-03-16 15:37:25 UTC 
ok, forget the -fstack-check
Comment 3 Harald Hoyer 2005-03-16 16:26:33 UTC 
ntpd compiled with gcc32, same symptoms...
Comment 4 Russell Coker 2005-04-10 17:20:44 UTC 
*** Bug 153271 has been marked as a duplicate of this bug. ***
Comment 5 Warren Togami 2005-04-10 19:21:05 UTC 
What arch?
Comment 6 Russell Coker 2005-04-10 22:06:11 UTC 
For me it's Intel, a P4.
Comment 7 Harald Hoyer 2005-04-11 10:06:11 UTC 
model name      : Intel(R) Pentium(R) 4 CPU 3.00GHz
Comment 8 Orion Poplawski 2005-04-26 17:57:52 UTC 
I'm seeing a lot of ntpd startup failures on FC3 and ntp-4.2.0.a.20040617-4

random, e.g.:


uname({sys="Linux", node="cynosure", ...}) = 0
gettimeofday({1114538224, 941201}, NULL) = 0
gettimeofday({1114538224, 941911}, NULL) = 0
gettimeofday({1114538224, 942277}, NULL) = 0
gettimeofday({1114538224, 942659}, NULL) = 0
gettimeofday({1114538224, 943019}, NULL) = 0
gettimeofday({1114538224, 943393}, NULL) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---

close(4)                                = 0
rt_sigaction(SIGSYS, {0xc5b3a0, [], SA_RESTORER, 0x1548c8}, {SIG_DFL}, 8) = 0
rt_sigprocmask(SIG_BLOCK, NULL, [], 8)  = 0
adjtimex({modes=61, offset=-1162, freq=5172136, maxerror=16, esterror=16,
status=64, constant=0, precision=1, tolerance=33554432, time={1114538247,
657822}}) = 5
rt_sigaction(SIGSYS, {SIG_DFL}, NULL, 8) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
Comment 9 Warren Togami 2005-04-27 00:17:32 UTC 
Can someone verify if this is the same issue as Bug 154759 which affects FC3
with 2.6.11 kernel?
Comment 10 Orion Poplawski 2005-04-27 14:44:58 UTC 
Looks like it to me.  Sorry about that.
Comment 11 Warren Togami 2005-05-08 01:50:13 UTC 

*** This bug has been marked as a duplicate of 154759 ***
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