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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, Vineet Gupta <vgupta@synopsys.com>
Subject: [PATCH 4.14 13/44] ARC: mm: allow mprotect to make stack mappings executable
Date: Mon, 23 Jul 2018 14:24:49 +0200	[thread overview]
Message-ID: <20180723122438.079454398@linuxfoundation.org> (raw)
In-Reply-To: <20180723122437.447870153@linuxfoundation.org>

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Vineet Gupta <vgupta@synopsys.com>

commit 93312b6da4df31e4102ce5420e6217135a16c7ea upstream.

mprotect(EXEC) was failing for stack mappings as default vm flags was
missing MAYEXEC.

This was triggered by glibc test suite nptl/tst-execstack testcase

What is surprising is that despite running LTP for years on, we didn't
catch this issue as it lacks a directed test case.

gcc dejagnu tests with nested functions also requiring exec stack work
fine though because they rely on the GNU_STACK segment spit out by
compiler and handled in kernel elf loader.

This glibc case is different as the stack is non exec to begin with and
a dlopen of shared lib with GNU_STACK segment triggers the exec stack
proceedings using a mprotect(PROT_EXEC) which was broken.

CC: stable@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arc/include/asm/page.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/arc/include/asm/page.h
+++ b/arch/arc/include/asm/page.h
@@ -105,7 +105,7 @@ typedef pte_t * pgtable_t;
 #define virt_addr_valid(kaddr)  pfn_valid(virt_to_pfn(kaddr))
 
 /* Default Permissions for stack/heaps pages (Non Executable) */
-#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE)
+#define VM_DATA_DEFAULT_FLAGS   (VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
 #define WANT_PAGE_VIRTUAL   1
 



  parent reply	other threads:[~2018-07-23 12:28 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-23 12:24 [PATCH 4.14 00/44] 4.14.58-stable review Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 01/44] scsi: sd_zbc: Fix variable type and bogus comment Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 04/44] x86/events/intel/ds: Fix bts_interrupt_threshold alignment Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 05/44] x86/MCE: Remove min interval polling limitation Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 06/44] fat: fix memory allocation failure handling of match_strdup() Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 07/44] ALSA: rawmidi: Change resized buffers atomically Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 08/44] ALSA: hda/realtek - Add Panasonic CF-SZ6 headset jack quirk Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 09/44] ALSA: hda: add mute led support for HP ProBook 455 G5 Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 10/44] ARCv2: [plat-hsdk]: Save accl reg pair by default Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 11/44] ARC: Fix CONFIG_SWAP Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 12/44] ARC: configs: Remove CONFIG_INITRAMFS_SOURCE from defconfigs Greg Kroah-Hartman
2018-07-23 12:24 ` Greg Kroah-Hartman [this message]
2018-07-23 12:24 ` [PATCH 4.14 14/44] mm: memcg: fix use after free in mem_cgroup_iter() Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 15/44] mm/huge_memory.c: fix data loss when splitting a file pmd Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 16/44] cpufreq: intel_pstate: Register when ACPI PCCH is present Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 17/44] vfio/pci: Fix potential Spectre v1 Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 18/44] vfio/spapr: Use IOMMU pageshift rather than pagesize Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 19/44] stop_machine: Disable preemption when waking two stopper threads Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 21/44] drm/nouveau: Use drm_connector_list_iter_* for iterating connectors Greg Kroah-Hartman
2018-07-23 12:24 ` [PATCH 4.14 22/44] drm/nouveau: Avoid looping through fake MST connectors Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 24/44] ipv4: Return EINVAL when ping_group_range sysctl doesnt map to user ns Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 25/44] ipv6: fix useless rol32 call on hash Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 26/44] ipv6: ila: select CONFIG_DST_CACHE Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 27/44] lib/rhashtable: consider param->min_size when setting initial table size Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 28/44] net: diag: Dont double-free TCP_NEW_SYN_RECV sockets in tcp_abort Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 29/44] net: Dont copy pfmemalloc flag in __copy_skb_header() Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 30/44] skbuff: Unconditionally copy pfmemalloc in __skb_clone() Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 31/44] net/ipv4: Set oif in fib_compute_spec_dst Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 32/44] net: phy: fix flag masking in __set_phy_supported Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 33/44] ptp: fix missing break in switch Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 35/44] tg3: Add higher cpu clock for 5762 Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 36/44] hv_netvsc: Fix napi reschedule while receive completion is busy Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 37/44] net/mlx4_en: Dont reuse RX page when XDP is set Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 38/44] net: systemport: Fix CRC forwarding check for SYSTEMPORT Lite Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 39/44] ipv6: make DAD fail with enhanced DAD when nonce length differs Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 40/44] net: usb: asix: replace mii_nway_restart in resume path Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 41/44] alpha: fix osf_wait4() breakage Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 42/44] cxl_getfile(): fix double-iput() on alloc_file() failures Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 43/44] powerpc/powernv: Fix save/restore of SPRG3 on entry/exit from stop (idle) Greg Kroah-Hartman
2018-07-23 12:25 ` [PATCH 4.14 44/44] xhci: Fix perceived dead host due to runtime suspend race with event handler Greg Kroah-Hartman
2018-07-24  7:44 ` [PATCH 4.14 00/44] 4.14.58-stable review Naresh Kamboju
2018-07-24 15:58 ` Guenter Roeck

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