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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Russell King <linux@armlinux.org.uk>,
	Arnd Bergmann <arnd@kernel.org>, Will Deacon <will@kernel.org>,
	Nathan Chancellor <natechancellor@gmail.com>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Theodore Tso <tytso@mit.edu>, Florian Weimer <fweimer@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH 4.9 24/35] compiler.h: Raise minimum version of GCC to 5.1 for arm64
Date: Fri, 22 Jan 2021 15:10:26 +0100	[thread overview]
Message-ID: <20210122135733.287240739@linuxfoundation.org> (raw)
In-Reply-To: <20210122135732.357969201@linuxfoundation.org>

From: Will Deacon <will@kernel.org>

commit dca5244d2f5b94f1809f0c02a549edf41ccd5493 upstream.

GCC versions >= 4.9 and < 5.1 have been shown to emit memory references
beyond the stack pointer, resulting in memory corruption if an interrupt
is taken after the stack pointer has been adjusted but before the
reference has been executed. This leads to subtle, infrequent data
corruption such as the EXT4 problems reported by Russell King at the
link below.

Life is too short for buggy compilers, so raise the minimum GCC version
required by arm64 to 5.1.

Reported-by: Russell King <linux@armlinux.org.uk>
Suggested-by: Arnd Bergmann <arnd@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Cc: Theodore Ts'o <tytso@mit.edu>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20210105154726.GD1551@shell.armlinux.org.uk
Link: https://lore.kernel.org/r/20210112224832.10980-1-will@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
[will: backport to 4.4.y/4.9.y/4.14.y]
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/compiler-gcc.h |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -149,6 +149,12 @@
 
 #if GCC_VERSION < 30200
 # error Sorry, your compiler is too old - please upgrade it.
+#elif defined(CONFIG_ARM64) && GCC_VERSION < 50100
+/*
+ * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63293
+ * https://lore.kernel.org/r/20210107111841.GN1551@shell.armlinux.org.uk
+ */
+# error Sorry, your version of GCC is too old - please use 5.1 or newer.
 #endif
 
 #if GCC_VERSION < 30300



  parent reply	other threads:[~2021-01-22 19:59 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-22 14:10 [PATCH 4.9 00/35] 4.9.253-rc1 review Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 01/35] ASoC: dapm: remove widget from dirty list on free Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 02/35] MIPS: boot: Fix unaligned access with CONFIG_MIPS_RAW_APPENDED_DTB Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 03/35] MIPS: Fix malformed NT_FILE and NT_SIGINFO in 32bit coredumps Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 04/35] MIPS: relocatable: fix possible boot hangup with KASLR enabled Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 05/35] ACPI: scan: Harden acpi_device_add() against device ID overflows Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 06/35] mm/hugetlb: fix potential missing huge page size info Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 07/35] ext4: fix bug for rename with RENAME_WHITEOUT Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 08/35] ARC: build: add boot_targets to PHONY Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 09/35] ethernet: ucc_geth: fix definition and size of ucc_geth_tx_global_pram Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 10/35] arch/arc: add copy_user_page() to <asm/page.h> to fix build error on ARC Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 11/35] misdn: dsp: select CONFIG_BITREVERSE Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 12/35] net: ethernet: fs_enet: Add missing MODULE_LICENSE Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 13/35] ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 14/35] ARM: picoxcell: fix missing interrupt-parent properties Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 15/35] Input: uinput - avoid FF flush when destroying device Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 16/35] dump_common_audit_data(): fix racy accesses to ->d_name Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 17/35] NFS: nfs_igrab_and_active must first reference the superblock Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 18/35] ext4: fix superblock checksum failure when setting password salt Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 19/35] RDMA/usnic: Fix memleak in find_free_vf_and_create_qp_grp Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 20/35] mm, slub: consider rest of partial list if acquire_slab() fails Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 21/35] net: sunrpc: interpret the return value of kstrtou32 correctly Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 22/35] netfilter: conntrack: fix reading nf_conntrack_buckets Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 23/35] usb: ohci: Make distrust_firmware param default to false Greg Kroah-Hartman
2021-01-22 14:10 ` Greg Kroah-Hartman [this message]
2021-01-22 14:10 ` [PATCH 4.9 25/35] nfsd4: readdirplus shouldnt return parent of export Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 26/35] net: cdc_ncm: correct overhead in delayed_ndp_size Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 27/35] netxen_nic: fix MSI/MSI-x interrupts Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 28/35] rndis_host: set proper input size for OID_GEN_PHYSICAL_MEDIUM request Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 29/35] net: dcb: Validate netlink message in DCB handler Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 30/35] net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 31/35] net: sit: unregister_netdevice on newlinks error path Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 32/35] net: avoid 32 x truesize under-estimation for tiny skbs Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 33/35] rxrpc: Fix handling of an unsupported token type in rxrpc_read() Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 34/35] tipc: fix NULL deref in tipc_link_xmit() Greg Kroah-Hartman
2021-01-22 14:10 ` [PATCH 4.9 35/35] spi: cadence: cache reference clock rate during probe Greg Kroah-Hartman
2021-01-23  0:25 ` [PATCH 4.9 00/35] 4.9.253-rc1 review Shuah Khan

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