From: Mikael Pettersson <[email protected]> Date: Fri, 28 Jul 2017 10:45:15 +0200
> David Miller writes: > > From: Mikael Pettersson <[email protected]> > > Date: Thu, 27 Jul 2017 21:45:25 +0200 > > > > > Attempting to build strace-4.18 as sparcv9 code and run its test suite > > > on a sparc64 machine (Sun Blade 2500 w/ 2 x USIIIi in my case) fails > > > reliably in three test cases (sched.gen, sched_xetattr.gen, and poll) > > > because two test binaries (sched_xetattr and poll) OOPS the kernel and > > > get killed. Sample dmesg from 4.13-rc2: > > > > > > [42912.270398] Unable to handle kernel NULL pointer dereference > > > [42912.327717] tsk->{mm,active_mm}->context = 000000000000136a > > > [42912.383789] tsk->{mm,active_mm}->pgd = fff0000227db4000 > > > [42912.435247] \|/ ____ \|/ > > > "@'/ .. \`@" > > > /_| \__/ |_\ > > > \__U_/ > > > [42912.559982] sched_xetattr(21866): Oops [#1] > > > [42912.597773] CPU: 0 PID: 21866 Comm: sched_xetattr Not tainted > 4.13.0-rc2 #1 > > > [42912.672138] task: fff0000229a5c380 task.stack: fff0000227dec000 > > > [42912.732876] TSTATE: 0000004411001603 TPC: 00000000007570fc TNPC: > 0000000000757110 Y: 00000000 Not tainted > > > [42912.845079] TPC: <__bzero+0x20/0xc0> > > > [42912.874870] g0: 0000000000000000 g1: 0000000000000000 g2: > 0000003000000000 g3: 00000000008ca100 > > > [42912.972120] g4: fff0000229a5c380 g5: fff000023ef44000 g6: > fff0000227dec000 g7: 0000000000000030 > > > [42913.069446] o0: 0000000000000030 o1: fff0000227defe70 o2: > 0000000000000000 o3: 0000000000000030 > > > [42913.166765] o4: fff0000227defe70 o5: 0000000000000000 sp: > fff0000227def5c1 ret_pc: 0000000000474fa4 > > > [42913.268664] RPC: <SyS_sched_setattr+0xb0/0x150> > > > > This looks really strange. It is a memset() call with the buffer pointer > > and length arguments reversed. > > > > What exact command did you give to configure and build strace-4.18 so that > > I can try to reproduce this? > > It's an rpmbuild --rebuild of Fedora's strace-4.18-1.fc24.src.rpm, but > according to the > build log the following should do it: > > export CFLAGS='-O2 -g -pipe -Wall -Werror=format-security > -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector > --param=ssp-buffer-size=4 -grecord-gcc-switches -m32 -mcpu=ultrasparc' > ./configure --build=sparcv9-unknown-linux-gnu > --host=sparcv9-unknown-linux-gnu --program-prefix= > --disable-dependency-tracking --prefix=/usr --exec-prefix=/u > sr --bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc > --datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib > --libexecdir=/usr/libexec --local > statedir=/var --sharedstatedir=/var/lib --mandir=/usr/share/man > --infodir=/usr/share/info > make -j2 > make -j2 -k check VERBOSE=1 I guess your gcc is emitting 64-bit code by default? Because simply using that configure line doesn't cause any problems for me and I get 32-bit binaries from the build. .
