From: David Howells Date: Fri, 11 May 2012 09:56:56 +0000 (+0100) Subject: KEYS: Use the compat keyctl() syscall wrapper on Sparc64 for Sparc32 compat X-Git-Tag: v3.2.19~93 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=215c55abf9534e37ab8971d6e70e4ba8bf59e985;p=karo-tx-linux.git KEYS: Use the compat keyctl() syscall wrapper on Sparc64 for Sparc32 compat commit 45de6767dc51358a188f75dc4ad9dfddb7fb9480 upstream. Use the 32-bit compat keyctl() syscall wrapper on Sparc64 for Sparc32 binary compatibility. Without this, keyctl(KEYCTL_INSTANTIATE_IOV) is liable to malfunction as it uses an iovec array read from userspace - though the kernel should survive this as it checks pointers and sizes anyway. I think all the other keyctl() function should just work, provided (a) the top 32-bits of each 64-bit argument register are cleared prior to invoking the syscall routine, and the 32-bit address space is right at the 0-end of the 64-bit address space. Most of the arguments are 32-bit anyway, and so for those clearing is not required. Signed-off-by: David Howells cc: sparclinux@vger.kernel.org Signed-off-by: Ben Hutchings --- diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index f92602e86607..f210d5120f67 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -583,6 +583,9 @@ config SYSVIPC_COMPAT depends on COMPAT && SYSVIPC default y +config KEYS_COMPAT + def_bool y if COMPAT && KEYS + endmenu source "net/Kconfig" diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S index db86b1a0e9a9..3a58e0d66f51 100644 --- a/arch/sparc/kernel/systbls_64.S +++ b/arch/sparc/kernel/systbls_64.S @@ -74,7 +74,7 @@ sys_call_table32: .word sys_timer_delete, compat_sys_timer_create, sys_ni_syscall, compat_sys_io_setup, sys_io_destroy /*270*/ .word sys32_io_submit, sys_io_cancel, compat_sys_io_getevents, sys32_mq_open, sys_mq_unlink .word compat_sys_mq_timedsend, compat_sys_mq_timedreceive, compat_sys_mq_notify, compat_sys_mq_getsetattr, compat_sys_waitid -/*280*/ .word sys32_tee, sys_add_key, sys_request_key, sys_keyctl, compat_sys_openat +/*280*/ .word sys32_tee, sys_add_key, sys_request_key, compat_sys_keyctl, compat_sys_openat .word sys_mkdirat, sys_mknodat, sys_fchownat, compat_sys_futimesat, compat_sys_fstatat64 /*290*/ .word sys_unlinkat, sys_renameat, sys_linkat, sys_symlinkat, sys_readlinkat .word sys_fchmodat, sys_faccessat, compat_sys_pselect6, compat_sys_ppoll, sys_unshare