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authorEric W. Biederman <ebiederm@xmission.com>2017-08-01 05:02:38 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-02-17 13:21:20 +0100
commitdf113487f844b9ba36cd87ed6c68d006b3f2e519 (patch)
treeb66717047f1511c2f3ace3776349c67a13c2a2a3
parent38e3bc59e0dd2885b223dc5466304af3eba1dd4b (diff)
mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy
commit 6ac1dc736b323011a55ecd1fc5897c24c4f77cbd upstream. Setting si_code to 0 is the same a setting si_code to SI_USER which is definitely not correct. With si_code set to SI_USER si_pid and si_uid will be copied to userspace instead of si_addr. Which is very wrong. So fix this by using a sensible si_code (SEGV_MAPERR) for this failure. Fixes: b920de1b77b7 ("mn10300: add the MN10300/AM33 architecture to the kernel") Cc: David Howells <dhowells@redhat.com> Cc: Masakazu Urade <urade.masakazu@jp.panasonic.com> Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com> Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--arch/mn10300/mm/misalignment.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mn10300/mm/misalignment.c b/arch/mn10300/mm/misalignment.c
index b9920b1edd5a..70cef54dc40f 100644
--- a/arch/mn10300/mm/misalignment.c
+++ b/arch/mn10300/mm/misalignment.c
@@ -437,7 +437,7 @@ transfer_failed:
info.si_signo = SIGSEGV;
info.si_errno = 0;
- info.si_code = 0;
+ info.si_code = SEGV_MAPERR;
info.si_addr = (void *) regs->pc;
force_sig_info(SIGSEGV, &info, current);
return;