Patch "sparc64: Fix exception handling in UltraSPARC-III memcpy." has been added to the 4.9-stable tree

Patch "sparc64: Fix exception handling in UltraSPARC-III memcpy." has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    sparc64: Fix exception handling in UltraSPARC-III memcpy.

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     sparc64-fix-exception-handling-in-ultrasparc-iii-memcpy.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From foo@baz Tue Aug  8 16:28:41 PDT 2017
From: "David S. Miller" <davem@davemloft.net>
Date: Fri, 4 Aug 2017 09:47:52 -0700
Subject: sparc64: Fix exception handling in UltraSPARC-III memcpy.

From: "David S. Miller" <davem@davemloft.net>


[ Upstream commit 0ede1c401332173ab0693121dc6cde04a4dbf131 ]

Mikael Pettersson reported that some test programs in the strace-4.18
testsuite cause an OOPS.

After some debugging it turns out that garbage values are returned
when an exception occurs, causing the fixup memset() to be run with
bogus arguments.

The problem is that two of the exception handler stubs write the
successfully copied length into the wrong register.

Fixes: ee841d0aff64 ("sparc64: Convert U3copy_{from,to}_user to accurate exception reporting.")
Reported-by: Mikael Pettersson <mikpelinux@gmail.com>
Tested-by: Mikael Pettersson <mikpelinux@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/sparc/lib/U3memcpy.S |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/arch/sparc/lib/U3memcpy.S
+++ b/arch/sparc/lib/U3memcpy.S
@@ -145,13 +145,13 @@ ENDPROC(U3_retl_o2_plus_GS_plus_0x08)
 ENTRY(U3_retl_o2_and_7_plus_GS)
 	and	%o2, 7, %o2
 	retl
-	 add	%o2, GLOBAL_SPARE, %o2
+	 add	%o2, GLOBAL_SPARE, %o0
 ENDPROC(U3_retl_o2_and_7_plus_GS)
 ENTRY(U3_retl_o2_and_7_plus_GS_plus_8)
 	add	GLOBAL_SPARE, 8, GLOBAL_SPARE
 	and	%o2, 7, %o2
 	retl
-	 add	%o2, GLOBAL_SPARE, %o2
+	 add	%o2, GLOBAL_SPARE, %o0
 ENDPROC(U3_retl_o2_and_7_plus_GS_plus_8)
 #endif
 


Patches currently in stable-queue which might be from davem@davemloft.net are

queue-4.9/ipv4-ipv6-initialize-treq-txhash-in-cookie_v_check.patch
queue-4.9/openvswitch-fix-potential-out-of-bound-access-in-parse_ct.patch
queue-4.9/ipv6-don-t-increase-ipstats_mib_fragfails-twice-in-ip6_fragment.patch
queue-4.9/sctp-don-t-dereference-ptr-before-leaving-_sctp_walk_-params-errors.patch
queue-4.9/net-ethernet-nb8800-handle-all-4-rgmii-modes-identically.patch
queue-4.9/sctp-fix-the-check-for-_sctp_walk_params-and-_sctp_walk_errors.patch
queue-4.9/packet-fix-use-after-free-in-prb_retire_rx_blk_timer_expired.patch
queue-4.9/rtnetlink-allocate-more-memory-for-dev_set_mac_address.patch
queue-4.9/tcp_bbr-remove-sk_pacing_rate-0-transient-during-init.patch
queue-4.9/tcp_bbr-introduce-bbr_bw_to_pacing_rate-helper.patch
queue-4.9/sparc64-measure-receiver-forward-progress-to-avoid-send-mondo-timeout.patch
queue-4.9/sparc64-fix-exception-handling-in-ultrasparc-iii-memcpy.patch
queue-4.9/dccp-fix-a-memleak-that-dccp_ipv6-doesn-t-put-reqsk-properly.patch
queue-4.9/tcp_bbr-introduce-bbr_init_pacing_rate_from_rtt-helper.patch
queue-4.9/sparc64-prevent-perf-from-running-during-super-critical-sections.patch
queue-4.9/net-dsa-b53-add-missing-arl-entries-for-bcm53125.patch
queue-4.9/dccp-fix-a-memleak-that-dccp_ipv4-doesn-t-put-reqsk-properly.patch
queue-4.9/mcs7780-fix-initialization-when-config_vmap_stack-is-enabled.patch
queue-4.9/net-zero-terminate-ifr_name-in-dev_ifname.patch
queue-4.9/tcp_bbr-init-pacing-rate-on-first-rtt-sample.patch
queue-4.9/net-phy-correctly-process-phy_halted-in-phy_stop_machine.patch
queue-4.9/ipv6-avoid-overflow-of-offset-in-ip6_find_1stfragopt.patch
queue-4.9/xen-netback-correctly-schedule-rate-limited-queues.patch
queue-4.9/dccp-fix-a-memleak-for-dccp_feat_init-err-process.patch
queue-4.9/ipv4-initialize-fib_trie-prior-to-register_netdev_notifier-call.patch
queue-4.9/tcp_bbr-cut-pacing-rate-only-if-filled-pipe.patch