From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Jan Kara <jack@suse.cz>,
Michal Hocko <mhocko@suse.com>,
Johannes Thumshirn <jthumshirn@suse.de>,
Dan Williams <dan.j.williams@intel.com>
Subject: [PATCH 4.9 24/35] mm: Preserve _PAGE_DEVMAP across mprotect() calls
Date: Thu, 18 Oct 2018 19:54:53 +0200 [thread overview]
Message-ID: <20181018175426.208544492@linuxfoundation.org> (raw)
In-Reply-To: <20181018175422.506152522@linuxfoundation.org>
4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Jan Kara <jack@suse.cz>
commit 4628a64591e6cee181237060961e98c615c33966 upstream.
Currently _PAGE_DEVMAP bit is not preserved in mprotect(2) calls. As a
result we will see warnings such as:
BUG: Bad page map in process JobWrk0013 pte:800001803875ea25 pmd:7624381067
addr:00007f0930720000 vm_flags:280000f9 anon_vma: (null) mapping:ffff97f2384056f0 index:0
file:457-000000fe00000030-00000009-000000ca-00000001_2001.fileblock fault:xfs_filemap_fault [xfs] mmap:xfs_file_mmap [xfs] readpage: (null)
CPU: 3 PID: 15848 Comm: JobWrk0013 Tainted: G W 4.12.14-2.g7573215-default #1 SLE12-SP4 (unreleased)
Hardware name: Intel Corporation S2600WFD/S2600WFD, BIOS SE5C620.86B.01.00.0833.051120182255 05/11/2018
Call Trace:
dump_stack+0x5a/0x75
print_bad_pte+0x217/0x2c0
? enqueue_task_fair+0x76/0x9f0
_vm_normal_page+0xe5/0x100
zap_pte_range+0x148/0x740
unmap_page_range+0x39a/0x4b0
unmap_vmas+0x42/0x90
unmap_region+0x99/0xf0
? vma_gap_callbacks_rotate+0x1a/0x20
do_munmap+0x255/0x3a0
vm_munmap+0x54/0x80
SyS_munmap+0x1d/0x30
do_syscall_64+0x74/0x150
entry_SYSCALL_64_after_hwframe+0x3d/0xa2
...
when mprotect(2) gets used on DAX mappings. Also there is a wide variety
of other failures that can result from the missing _PAGE_DEVMAP flag
when the area gets used by get_user_pages() later.
Fix the problem by including _PAGE_DEVMAP in a set of flags that get
preserved by mprotect(2).
Fixes: 69660fd797c3 ("x86, mm: introduce _PAGE_DEVMAP")
Fixes: ebd31197931d ("powerpc/mm: Add devmap support for ppc64")
Cc: <stable@vger.kernel.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/pgtable_types.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -134,7 +134,7 @@
*/
#define _PAGE_CHG_MASK (PTE_PFN_MASK | _PAGE_PCD | _PAGE_PWT | \
_PAGE_SPECIAL | _PAGE_ACCESSED | _PAGE_DIRTY | \
- _PAGE_SOFT_DIRTY)
+ _PAGE_SOFT_DIRTY | _PAGE_DEVMAP)
#define _HPAGE_CHG_MASK (_PAGE_CHG_MASK | _PAGE_PSE)
/* The ASID is the lower 12 bits of CR3 */
next prev parent reply other threads:[~2018-10-18 18:03 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-18 17:54 [PATCH 4.9 00/35] 4.9.135-stable review Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 01/35] media: af9035: prevent buffer overflow on write Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 02/35] batman-adv: Fix segfault when writing to throughput_override Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 03/35] batman-adv: Fix segfault when writing to sysfs elp_interval Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 04/35] batman-adv: Prevent duplicated nc_node entry Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 05/35] batman-adv: Prevent duplicated softif_vlan entry Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 06/35] batman-adv: Prevent duplicated global TT entry Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 07/35] batman-adv: Prevent duplicated tvlv handler Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 08/35] batman-adv: fix backbone_gw refcount on queue_work() failure Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 09/35] batman-adv: fix hardif_neigh " Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 10/35] clocksource/drivers/ti-32k: Add CLOCK_SOURCE_SUSPEND_NONSTOP flag for non-am43 SoCs Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 11/35] scsi: ibmvscsis: Fix a stringop-overflow warning Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 12/35] scsi: ibmvscsis: Ensure partition name is properly NUL terminated Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 13/35] Input: atakbd - fix Atari keymap Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 14/35] Input: atakbd - fix Atari CapsLock behaviour Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 15/35] ravb: do not write 1 to reserved bits Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 16/35] drm: mali-dp: Call drm_crtc_vblank_reset on device init Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 17/35] scsi: sd: dont crash the host on invalid commands Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 18/35] net/mlx4: Use cpumask_available for eq->affinity_mask Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 19/35] RISC-V: include linux/ftrace.h in asm-prototypes.h Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 20/35] powerpc/tm: Fix userspace r13 corruption Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 21/35] powerpc/tm: Avoid possible userspace r1 corruption on reclaim Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 22/35] iommu/amd: Return devid as alias for ACPI HID devices Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 23/35] mremap: properly flush TLB before releasing the page Greg Kroah-Hartman
2018-10-18 17:54 ` Greg Kroah-Hartman [this message]
2018-10-18 17:54 ` [PATCH 4.9 25/35] netfilter: check for seqadj ext existence before adding it in nf_nat_setup_info Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 26/35] ARC: build: Get rid of toolchain check Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 27/35] ARC: build: Dont set CROSS_COMPILE in archs Makefile Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 28/35] HID: quirks: fix support for Apple Magic Keyboards Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 29/35] usb: gadget: serial: fix oops when data rxd after close Greg Kroah-Hartman
2018-10-18 17:54 ` [PATCH 4.9 30/35] sched/cputime: Convert kcpustat to nsecs Greg Kroah-Hartman
2018-10-18 17:55 ` [PATCH 4.9 31/35] macintosh/rack-meter: Convert cputime64_t use to u64 Greg Kroah-Hartman
2018-10-18 17:55 ` [PATCH 4.9 32/35] sched/cputime: Increment kcpustat directly on irqtime account Greg Kroah-Hartman
2018-10-18 17:55 ` [PATCH 4.9 33/35] sched/cputime: Fix ksoftirqd cputime accounting regression Greg Kroah-Hartman
2018-10-18 17:55 ` [PATCH 4.9 34/35] ext4: avoid running out of journal credits when appending to an inline file Greg Kroah-Hartman
2018-10-18 17:55 ` [PATCH 4.9 35/35] HV: properly delay KVP packets when negotiation is in progress Greg Kroah-Hartman
2018-10-19 1:41 ` [PATCH 4.9 00/35] 4.9.135-stable review Nathan Chancellor
2018-10-19 13:20 ` Rafael David Tinoco
2018-10-19 15:48 ` Guenter Roeck
2018-10-19 20:46 ` Shuah Khan
2018-10-19 20:55 ` Shuah Khan
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