From: Dmitry V. Levin Date: Wed, 27 Apr 2016 01:56:11 +0000 (+0300) Subject: parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls X-Git-Tag: v3.16.36~35 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b1a2e529e9b98b800ad54c1f846ea0e0dbc36adf;p=thirdparty%2Fkernel%2Fstable.git parisc: fix a bug when syscall number of tracee is __NR_Linux_syscalls commit f0b22d1bb2a37a665a969e95785c75a4f49d1499 upstream. 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. Signed-off-by: Dmitry V. Levin Acked-by: Helge Deller Signed-off-by: Helge Deller [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- diff --git a/arch/parisc/kernel/syscall.S b/arch/parisc/kernel/syscall.S index 0b8d26d3ba43b..7105610ac3fd2 100644 --- a/arch/parisc/kernel/syscall.S +++ b/arch/parisc/kernel/syscall.S @@ -342,7 +342,7 @@ tracesys_next: stw %r21, -56(%r30) /* 6th argument */ #endif - comiclr,>>= __NR_Linux_syscalls, %r20, %r0 + comiclr,>> __NR_Linux_syscalls, %r20, %r0 b,n .Lsyscall_nosys LDREGX %r20(%r19), %r19