diff options
| author | Andy Lutomirski <luto@kernel.org> | 2019-07-03 13:34:03 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-22 10:31:22 +0200 |
| commit | f85a8573ceb225e606fcf38a9320782316f47c71 (patch) | |
| tree | afe686274467678788337a7c2872028ac777ae81 | |
| parent | a8d03c3f300eefff3b5c14798409e4b43e37dd9b (diff) | |
x86/syscalls: Disallow compat entries for all types of 64-bit syscalls
A "compat" entry in the syscall tables means to use a different entry on
32-bit and 64-bit builds.
This only makes sense for syscalls that exist in the first place in 32-bit
builds, so disallow it for anything other than i386.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/4b7565954c5a06530ac01d98cb1592538fd8ae51.1562185330.git.luto@kernel.org
| -rw-r--r-- | arch/x86/entry/syscalls/syscalltbl.sh | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/entry/syscalls/syscalltbl.sh b/arch/x86/entry/syscalls/syscalltbl.sh index 94fcd1951aca..53c8c1a9adf9 100644 --- a/arch/x86/entry/syscalls/syscalltbl.sh +++ b/arch/x86/entry/syscalls/syscalltbl.sh @@ -27,8 +27,8 @@ emit() { compat="$4" umlentry="" - if [ "$abi" = "64" -a -n "$compat" ]; then - echo "a compat entry for a 64-bit syscall makes no sense" >&2 + if [ "$abi" != "I386" -a -n "$compat" ]; then + echo "a compat entry ($abi: $compat) for a 64-bit syscall makes no sense" >&2 exit 1 fi |