From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, zhong jiang <zhongjiang@huawei.com>,
Vlastimil Babka <vbabka@suse.cz>,
Oscar Salvador <osalvador@suse.de>,
Anshuman Khandual <khandual@linux.vnet.ibm.com>,
Michal Hocko <mhocko@suse.com>,
Mel Gorman <mgorman@techsingularity.net>,
Andrea Arcangeli <aarcange@redhat.com>,
Ralph Campbell <rcampbell@nvidia.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: [PATCH 5.1 05/55] mm/mempolicy.c: fix an incorrect rebind node in mpol_rebind_nodemask
Date: Tue, 2 Jul 2019 10:01:13 +0200 [thread overview]
Message-ID: <20190702080124.339370580@linuxfoundation.org> (raw)
In-Reply-To: <20190702080124.103022729@linuxfoundation.org>
From: zhong jiang <zhongjiang@huawei.com>
commit 29b190fa774dd1b72a1a6f19687d55dc72ea83be upstream.
mpol_rebind_nodemask() is called for MPOL_BIND and MPOL_INTERLEAVE
mempoclicies when the tasks's cpuset's mems_allowed changes. For
policies created without MPOL_F_STATIC_NODES or MPOL_F_RELATIVE_NODES,
it works by remapping the policy's allowed nodes (stored in v.nodes)
using the previous value of mems_allowed (stored in
w.cpuset_mems_allowed) as the domain of map and the new mems_allowed
(passed as nodes) as the range of the map (see the comment of
bitmap_remap() for details).
The result of remapping is stored back as policy's nodemask in v.nodes,
and the new value of mems_allowed should be stored in
w.cpuset_mems_allowed to facilitate the next rebind, if it happens.
However, 213980c0f23b ("mm, mempolicy: simplify rebinding mempolicies
when updating cpusets") introduced a bug where the result of remapping
is stored in w.cpuset_mems_allowed instead. Thus, a mempolicy's
allowed nodes can evolve in an unexpected way after a series of
rebinding due to cpuset mems_allowed changes, possibly binding to a
wrong node or a smaller number of nodes which may e.g. overload them.
This patch fixes the bug so rebinding again works as intended.
[vbabka@suse.cz: new changlog]
Link: http://lkml.kernel.org/r/ef6a69c6-c052-b067-8f2c-9d615c619bb9@suse.cz
Link: http://lkml.kernel.org/r/1558768043-23184-1-git-send-email-zhongjiang@huawei.com
Fixes: 213980c0f23b ("mm, mempolicy: simplify rebinding mempolicies when updating cpusets")
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
mm/mempolicy.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -306,7 +306,7 @@ static void mpol_rebind_nodemask(struct
else {
nodes_remap(tmp, pol->v.nodes,pol->w.cpuset_mems_allowed,
*nodes);
- pol->w.cpuset_mems_allowed = tmp;
+ pol->w.cpuset_mems_allowed = *nodes;
}
if (nodes_empty(tmp))
next prev parent reply other threads:[~2019-07-02 8:03 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-02 8:01 [PATCH 5.1 00/55] 5.1.16-stable review Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 01/55] arm64: Dont unconditionally add -Wno-psabi to KBUILD_CFLAGS Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 02/55] Revert "x86/uaccess, ftrace: Fix ftrace_likely_update() vs. SMAP" Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 03/55] qmi_wwan: Fix out-of-bounds read Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 04/55] fs/proc/array.c: allow reporting eip/esp for all coredumping threads Greg Kroah-Hartman
2019-07-02 8:01 ` Greg Kroah-Hartman [this message]
2019-07-02 8:01 ` [PATCH 5.1 06/55] fs/binfmt_flat.c: make load_flat_shared_library() work Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 07/55] clk: tegra210: Fix default rates for HDA clocks Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 08/55] clk: socfpga: stratix10: fix divider entry for the emac clocks Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 09/55] drm/i915: Force 2*96 MHz cdclk on glk/cnl when audio power is enabled Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 10/55] drm/i915: Save the old CDCLK atomic state Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 11/55] drm/i915: Remove redundant store of logical CDCLK state Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 12/55] drm/i915: Skip modeset for cdclk changes if possible Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 13/55] mm: soft-offline: return -EBUSY if set_hwpoison_free_buddy_page() fails Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 14/55] mm: hugetlb: soft-offline: dissolve_free_huge_page() return zero on !PageHuge Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 15/55] mm/page_idle.c: fix oops because end_pfn is larger than max_pfn Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 16/55] mm, swap: fix THP swap out Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 17/55] dm init: fix incorrect uses of kstrndup() Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 18/55] dm log writes: make sure super sector log updates are written in order Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 19/55] io_uring: ensure req->file is cleared on allocation Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 20/55] scsi: vmw_pscsi: Fix use-after-free in pvscsi_queue_lck() Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 21/55] x86/speculation: Allow guests to use SSBD even if host does not Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 22/55] x86/microcode: Fix the microcode load on CPU hotplug for real Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 23/55] x86/resctrl: Prevent possible overrun during bitmap operations Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 24/55] mm: fix page cache convergence regression Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 25/55] efi/memreserve: deal with memreserve entries in unmapped memory Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 26/55] NFS/flexfiles: Use the correct TCP timeout for flexfiles I/O Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 27/55] cpu/speculation: Warn on unsupported mitigations= parameter Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 28/55] SUNRPC: Fix up calculation of client message length Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 29/55] irqchip/mips-gic: Use the correct local interrupt map registers Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 30/55] af_packet: Block execution of tasks waiting for transmit to complete in AF_PACKET Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 31/55] bonding: Always enable vlan tx offload Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 32/55] ipv4: Use return value of inet_iif() for __raw_v4_lookup in the while loop Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 33/55] net/packet: fix memory leak in packet_set_ring() Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 34/55] net: remove duplicate fetch in sock_getsockopt Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 35/55] net: stmmac: fixed new system time seconds value calculation Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 36/55] net: stmmac: set IC bit when transmitting frames with HW timestamp Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 37/55] net/tls: fix page double free on TX cleanup Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 38/55] sctp: change to hold sk after auth shkey is created successfully Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 39/55] team: Always enable vlan tx offload Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 40/55] tipc: change to use register_pernet_device Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 41/55] tipc: check msg->req data len in tipc_nl_compat_bearer_disable Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 42/55] tun: wake up waitqueues after IFF_UP is set Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 43/55] net: aquantia: fix vlans not working over bridged network Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 44/55] bpf: simplify definition of BPF_FIB_LOOKUP related flags Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 45/55] bpf: lpm_trie: check left child of last leftmost node for NULL Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 46/55] bpf: fix nested bpf tracepoints with per-cpu data Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 47/55] bpf: fix unconnected udp hooks Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 48/55] bpf: udp: Avoid calling reuseports bpf_prog from udp_gro Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 49/55] bpf: udp: ipv6: Avoid running reuseports bpf_prog from __udp6_lib_err Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 50/55] arm64: futex: Avoid copying out uninitialised stack in failed cmpxchg() Greg Kroah-Hartman
2019-07-02 8:01 ` [PATCH 5.1 51/55] bpf, arm64: use more scalable stadd over ldxr / stxr loop in xadd Greg Kroah-Hartman
2019-07-03 2:02 ` Sasha Levin
2019-07-03 7:24 ` Greg Kroah-Hartman
2019-07-02 8:02 ` [PATCH 5.1 52/55] futex: Update comments and docs about return values of arch futex code Greg Kroah-Hartman
2019-07-02 8:02 ` [PATCH 5.1 53/55] RDMA: Directly cast the sockaddr union to sockaddr Greg Kroah-Hartman
2019-07-02 8:02 ` [PATCH 5.1 54/55] fanotify: update connector fsid cache on add mark Greg Kroah-Hartman
2019-07-02 8:02 ` [PATCH 5.1 55/55] tipc: pass tunnel dev as NULL to udp_tunnel(6)_xmit_skb Greg Kroah-Hartman
2019-07-02 14:32 ` [PATCH 5.1 00/55] 5.1.16-stable review kernelci.org bot
2019-07-02 17:39 ` Naresh Kamboju
2019-07-03 9:11 ` Greg Kroah-Hartman
2019-07-02 18:06 ` Jiunn Chang
2019-07-02 21:09 ` Kelsey Skunberg
2019-07-02 22:56 ` shuah
2019-07-03 9:12 ` Greg Kroah-Hartman
2019-07-03 6:26 ` Shreeya Patel
2019-07-03 10:21 ` Jon Hunter
2019-07-03 10:49 ` Greg Kroah-Hartman
2019-07-04 5:27 ` Bharath Vedartham
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