From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Mikhail Zaslonko <zaslonko@linux.ibm.com>,
Michal Hocko <mhocko@suse.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>,
Pavel Tatashin <pasha.tatashin@soleen.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Sasha Levin <sashal@kernel.org>,
linux-mm@kvack.org
Subject: [PATCH AUTOSEL 4.19 61/65] mm, memory_hotplug: test_pages_in_a_zone do not pass the end of zone
Date: Sat, 23 Feb 2019 16:06:36 -0500 [thread overview]
Message-ID: <20190223210640.200911-61-sashal@kernel.org> (raw)
In-Reply-To: <20190223210640.200911-1-sashal@kernel.org>
From: Mikhail Zaslonko <zaslonko@linux.ibm.com>
[ Upstream commit 24feb47c5fa5b825efb0151f28906dfdad027e61 ]
If memory end is not aligned with the sparse memory section boundary,
the mapping of such a section is only partly initialized. This may lead
to VM_BUG_ON due to uninitialized struct pages access from
test_pages_in_a_zone() function triggered by memory_hotplug sysfs
handlers.
Here are the the panic examples:
CONFIG_DEBUG_VM_PGFLAGS=y
kernel parameter mem=2050M
--------------------------
page:000003d082008000 is uninitialized and poisoned
page dumped because: VM_BUG_ON_PAGE(PagePoisoned(p))
Call Trace:
test_pages_in_a_zone+0xde/0x160
show_valid_zones+0x5c/0x190
dev_attr_show+0x34/0x70
sysfs_kf_seq_show+0xc8/0x148
seq_read+0x204/0x480
__vfs_read+0x32/0x178
vfs_read+0x82/0x138
ksys_read+0x5a/0xb0
system_call+0xdc/0x2d8
Last Breaking-Event-Address:
test_pages_in_a_zone+0xde/0x160
Kernel panic - not syncing: Fatal exception: panic_on_oops
Fix this by checking whether the pfn to check is within the zone.
[mhocko@suse.com: separated this change from http://lkml.kernel.org/r/20181105150401.97287-2-zaslonko@linux.ibm.com]
Link: http://lkml.kernel.org/r/20190128144506.15603-3-mhocko@kernel.org
[mhocko@suse.com: separated this change from
http://lkml.kernel.org/r/20181105150401.97287-2-zaslonko@linux.ibm.com]
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Mikhail Zaslonko <zaslonko@linux.ibm.com>
Tested-by: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Tested-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Mikhail Gavrilov <mikhail.v.gavrilov@gmail.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
mm/memory_hotplug.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 34cde04f346d9..ff93a57e1694c 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1299,6 +1299,9 @@ int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn,
i++;
if (i == MAX_ORDER_NR_PAGES || pfn + i >= end_pfn)
continue;
+ /* Check if we got outside of the zone */
+ if (zone && !zone_spans_pfn(zone, pfn + i))
+ return 0;
page = pfn_to_page(pfn + i);
if (zone && page_zone(page) != zone)
return 0;
--
2.19.1
next prev parent reply other threads:[~2019-02-23 21:08 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-23 21:05 [PATCH AUTOSEL 4.19 01/65] vti4: Fix a ipip packet processing bug in 'IPCOMP' virtual tunnel Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 02/65] xfrm: refine validation of template and selector families Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 03/65] xfrm: Make set-mark default behavior backward compatible Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 04/65] netfilter: nft_compat: use refcnt_t type for nft_xt reference count Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 05/65] netfilter: nft_compat: make lists per netns Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 06/65] perf script: Fix crash with printing mixed trace point and other events Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 07/65] perf core: Fix perf_proc_update_handler() bug Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 08/65] perf tools: Handle TOPOLOGY headers with no CPU Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 09/65] perf script: Fix crash when processing recorded stat data Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 10/65] IB/{hfi1, qib}: Fix WC.byte_len calculation for UD_SEND_WITH_IMM Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 11/65] iommu/amd: Call free_iova_fast with pfn in map_sg Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 12/65] iommu/amd: Unmap all mapped pages in error path of map_sg Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 13/65] riscv: fixup max_low_pfn with PFN_DOWN Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 14/65] ipvs: Fix signed integer overflow when setsockopt timeout Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 15/65] iommu/amd: Fix IOMMU page flush when detach device from a domain Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 16/65] clk: ti: Fix error handling in ti_clk_parse_divider_data() Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 17/65] clk: qcom: gcc: Use active only source for CPUSS clocks Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 18/65] xtensa: SMP: fix ccount_timer_shutdown Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 19/65] riscv: Adjust mmap base address at a third of task size Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 20/65] IB/ipoib: Fix for use-after-free in ipoib_cm_tx_start Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 21/65] selftests: cpu-hotplug: fix case where CPUs offline > CPUs present Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 22/65] xtensa: SMP: fix secondary CPU initialization Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 23/65] xtensa: smp_lx200_defconfig: fix vectors clash Sasha Levin
2019-02-23 21:05 ` [PATCH AUTOSEL 4.19 24/65] xtensa: SMP: mark each possible CPU as present Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 25/65] iomap: get/put the page in iomap_page_create/release() Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 26/65] iomap: fix a use after free in iomap_dio_rw Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 27/65] xtensa: SMP: limit number of possible CPUs by NR_CPUS Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 28/65] net: altera_tse: fix msgdma_tx_completion on non-zero fill_level case Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 29/65] net: hns: Fix for missing of_node_put() after of_parse_phandle() Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 30/65] net: hns: Restart autoneg need return failed when autoneg off Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 31/65] net: hns: Fix wrong read accesses via Clause 45 MDIO protocol Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 32/65] net: stmmac: dwmac-rk: fix error handling in rk_gmac_powerup() Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 33/65] netfilter: ebtables: compat: un-break 32bit setsockopt when no rules are present Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 34/65] netfilter: nfnetlink_osf: add missing fmatch check Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 35/65] gpio: vf610: Mask all GPIO interrupts Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 36/65] selftests: net: use LDLIBS instead of LDFLAGS Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 37/65] selftests: timers: " Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 38/65] nfs: Fix NULL pointer dereference of dev_name Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 39/65] qed: Fix bug in tx promiscuous mode settings Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 40/65] qed: Fix LACP pdu drops for VFs Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 41/65] qed: Fix VF probe failure while FLR Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 42/65] qed: Fix system crash in ll2 xmit Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 43/65] qed: Fix stack out of bounds bug Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 44/65] scsi: libfc: free skb when receiving invalid flogi resp Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 45/65] scsi: scsi_debug: fix write_same with virtual_gb problem Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 46/65] scsi: bnx2fc: Fix error handling in probe() Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 47/65] scsi: 53c700: pass correct "dev" to dma_alloc_attrs() Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 48/65] platform/x86: Fix unmet dependency warning for ACPI_CMPC Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 49/65] platform/x86: Fix unmet dependency warning for SAMSUNG_Q10 Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 50/65] net: macb: Apply RXUBR workaround only to versions with errata Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 51/65] x86/boot/compressed/64: Set EFER.LME=1 in 32-bit trampoline before returning to long mode Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 52/65] cifs: fix computation for MAX_SMB2_HDR_SIZE Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 53/65] blk-mq: fix a hung issue when fsync Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 54/65] x86/microcode/amd: Don't falsely trick the late loading mechanism Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 55/65] arm64: kprobe: Always blacklist the KVM world-switch code Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 56/65] apparmor: Fix aa_label_build() error handling for failed merges Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 57/65] x86/kexec: Don't setup EFI info if EFI runtime is not enabled Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 58/65] proc: fix /proc/net/* after setns(2) Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 59/65] x86_64: increase stack size for KASAN_EXTRA Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 60/65] mm, memory_hotplug: is_mem_section_removable do not pass the end of a zone Sasha Levin
2019-02-23 21:06 ` Sasha Levin [this message]
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 62/65] lib/test_kmod.c: potential double free in error handling Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 63/65] fs/drop_caches.c: avoid softlockups in drop_pagecache_sb() Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 64/65] autofs: drop dentry reference only when it is never used Sasha Levin
2019-02-23 21:06 ` [PATCH AUTOSEL 4.19 65/65] autofs: fix error return in autofs_fill_super() Sasha Levin
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