Messages in this thread | | | Date | Wed, 27 Apr 2016 06:28:26 +0300 | From | "Dmitry V. Levin" <> | Subject | Re: [PATCH] parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls |
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On Tue, Apr 26, 2016 at 10:45:11PM -0400, Mike Frysinger wrote: > On 27 Apr 2016 04:56, Dmitry V. Levin wrote: > > Do not load one entry beyond the end of the syscall table when the > > syscall number of a traced process equals to __NR_Linux_syscalls. > > Similar bug with regular processes was fixed by commit 3bb457af4fa8 > > ("[PARISC] Fix bug when syscall nr is __NR_Linux_syscalls"). > > > > This bug was found by strace test suite. > > > > Cc: stable@vger.kernel.org > > Signed-off-by: Dmitry V. Levin <ldv@altlinux.org> > > --- > > arch/parisc/kernel/syscall.S | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S > > index c976ebf..57b4836 100644 > > --- a/arch/parisc/kernel/syscall.S > > +++ b/arch/parisc/kernel/syscall.S > > @@ -344,7 +344,7 @@ tracesys_next: > > #endif > > > > cmpib,COND(=),n -1,%r20,tracesys_exit /* seccomp may have returned -1 */ > > - comiclr,>>= __NR_Linux_syscalls, %r20, %r0 > > + comiclr,>> __NR_Linux_syscalls, %r20, %r0 > > b,n .Ltracesys_nosys > > > > LDREGX %r20(%r19), %r19 > > i've deployd your fix to hake, so feel free to give the tests another > run to try and crash the box :).
With this fix the box no longer crashes.
-- ldv [unhandled content-type:application/pgp-signature] | |