| Message ID | 20190730092547.1284-1-will@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | arm64: compat: Provide definition for COMPAT_SIGMINSTKSZ | expand |
On 2019-07-31 11:47, Greg KH wrote: > On Tue, Jul 30, 2019 at 11:42:26AM +0200, Greg KH wrote: > > On Tue, Jul 30, 2019 at 10:39:38AM +0100, Will Deacon wrote: > > > On Tue, Jul 30, 2019 at 11:37:13AM +0200, Greg KH wrote: > > > > On Tue, Jul 30, 2019 at 10:25:47AM +0100, Will Deacon wrote: > > > > > From: Will Deacon <will.deacon@arm.com> > > > > > > > > > > [ Upstream commit 24951465cbd279f60b1fdc2421b3694405bcff42 ] > > > > > > > > > > arch/arm/ defines a SIGMINSTKSZ of 2k, so we should use the same value > > > > > for compat tasks. > > > > > > > > > > Cc: <stable@vger.kernel.org> # 4.9+ > > > > > Cc: Aurelien Jarno <aurelien@aurel32.net> > > > > > Cc: Arnd Bergmann <arnd@arndb.de> > > > > > Cc: Dominik Brodowski <linux@dominikbrodowski.net> > > > > > Cc: "Eric W. Biederman" <ebiederm@xmission.com> > > > > > Cc: Andrew Morton <akpm@linux-foundation.org> > > > > > Cc: Al Viro <viro@zeniv.linux.org.uk> > > > > > Cc: Oleg Nesterov <oleg@redhat.com> > > > > > Reviewed-by: Dave Martin <Dave.Martin@arm.com> > > > > > Reported-by: Steve McIntyre <steve.mcintyre@arm.com> > > > > > Tested-by: Steve McIntyre <93sam@debian.org> > > > > > Signed-off-by: Will Deacon <will.deacon@arm.com> > > > > > Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> > > > > > --- > > > > > > > > > > Aurelien points out that this didn't get selected for -stable despite its > > > > > counterpart (22839869f21a ("signal: Introduce COMPAT_SIGMINSTKSZ for use > > > > > in compat_sys_sigaltstack")) being backported to 4.9. Oops. > > > > > > > > So this needs to go into 4.9.y, 4.14.y, and 4.19.y? > > > > > > Yes, please. > > > > Thanks, will do after this next round of kernels goes out. > > Now queued up, thanks. > Thanks! -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurelien@aurel32.net http://www.aurel32.net
diff --git a/arch/arm64/include/asm/compat.h b/arch/arm64/include/asm/compat.h index 1a037b94eba1..cee28a05ee98 100644 --- a/arch/arm64/include/asm/compat.h +++ b/arch/arm64/include/asm/compat.h @@ -159,6 +159,7 @@ static inline compat_uptr_t ptr_to_compat(void __user *uptr) } #define compat_user_stack_pointer() (user_stack_pointer(task_pt_regs(current))) +#define COMPAT_MINSIGSTKSZ 2048 static inline void __user *arch_compat_alloc_user_space(long len) {