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authorEric W. Biederman <ebiederm@xmission.com>2017-08-01 13:02:38 +0300
committerEric W. Biederman <ebiederm@xmission.com>2018-01-12 23:23:36 +0300
commit6ac1dc736b323011a55ecd1fc5897c24c4f77cbd (patch)
tree2bb4ab3a88e8266cee7b4cda6512fa4cffb712fd /arch/mn10300
parentfaf1f22b61f2715224ba9b579e2a983e99b86823 (diff)
downloadlinux-6ac1dc736b323011a55ecd1fc5897c24c4f77cbd.tar.xz
mn10300/misalignment: Use SIGSEGV SEGV_MAPERR to report a failed user copy
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. Cc: stable@vger.kernel.org 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>
Diffstat (limited to 'arch/mn10300')
-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 b39a388825ae..8ace89617c1c 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;