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authorVincenzo Frascino <vincenzo.frascino@arm.com>2019-08-30 14:58:57 +0100
committerPaul Burton <paul.burton@mips.com>2019-09-03 15:35:23 +0100
commit932bb934ed4d05d4bd5e8e3c3aaa5f92e0a89d90 (patch)
treeeb7d624ade7428de32050155c963c35bacc92c30 /arch/mips/vdso
parent3d77a95fc03b8d811ec96b76d7874713192c725a (diff)
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mips: compat: vdso: Use legacy syscalls as fallback
The generic VDSO implementation uses the Y2038 safe clock_gettime64() and clock_getres_time64() syscalls as fallback for 32bit VDSO. This breaks seccomp setups because these syscalls might be not (yet) allowed. Implement the 32bit variants which use the legacy syscalls and select the variant in the core library. The 64bit time variants are not removed because they are required for the time64 based vdso accessors. Cc: Paul Burton <paul.burton@mips.com> Fixes: 00b26474c2f1 ("lib/vdso: Provide generic VDSO implementation") Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com> Signed-off-by: Paul Burton <paul.burton@mips.com> Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@vger.kernel.org Cc: linux-kselftest@vger.kernel.org Cc: catalin.marinas@arm.com Cc: will@kernel.org Cc: tglx@linutronix.de Cc: salyzyn@android.com Cc: 0x7f454c46@gmail.com Cc: luto@kernel.org
Diffstat (limited to 'arch/mips/vdso')
-rw-r--r--arch/mips/vdso/config-n32-o32-env.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/vdso/config-n32-o32-env.c b/arch/mips/vdso/config-n32-o32-env.c
index 7f8d957abd4a..0011a632aef2 100644
--- a/arch/mips/vdso/config-n32-o32-env.c
+++ b/arch/mips/vdso/config-n32-o32-env.c
@@ -10,6 +10,7 @@
*/
#undef CONFIG_64BIT
+#define BUILD_VDSO32
#define CONFIG_32BIT 1
#define CONFIG_GENERIC_ATOMIC64 1
#define BUILD_VDSO32_64