Waiman Long 82f0b6f041 mm: prevent derefencing NULL ptr in pfn_section_valid() ...

Commit 5ec8e8ea8b ("mm/sparsemem: fix race in accessing
memory_section->usage") changed pfn_section_valid() to add a READ_ONCE()
call around "ms->usage" to fix a race with section_deactivate() where
ms->usage can be cleared.  The READ_ONCE() call, by itself, is not enough
to prevent NULL pointer dereference.  We need to check its value before
dereferencing it.

Link: https://lkml.kernel.org/r/20240626001639.1350646-1-longman@redhat.com
Fixes: 5ec8e8ea8b ("mm/sparsemem: fix race in accessing memory_section->usage")
Signed-off-by: Waiman Long <longman@redhat.com>
Cc: Charan Teja Kalla <quic_charante@quicinc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2024-07-03 22:40:36 -07:00

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acpi

ACPI: EC: Evaluate orphan _REG under EC device

2024-06-13 11:28:54 +02:00

asm-generic

syscalls: mmap(): use unsigned offset type consistently

2024-06-25 15:57:38 +02:00

clocksource

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crypto

Merge tag 'v6.10-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

2024-05-20 08:47:54 -07:00

drm

Merge tag 'drm-misc-fixes-2024-05-23' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

2024-05-27 13:47:14 +10:00

dt-bindings

dt-bindings: net: dp8386x: Add MIT license along with GPL-2.0

2024-06-07 12:16:22 +01:00

keys

Merge tag 'tpmdd-next-6.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd

2024-05-13 10:40:15 -07:00

kunit

kunit: Print last test location on fault

2024-05-06 14:22:02 -06:00

kvm

Merge branch kvm-arm64/misc-6.10 into kvmarm-master/next

2024-05-08 16:41:50 +01:00

linux

mm: prevent derefencing NULL ptr in pfn_section_valid()

2024-07-03 22:40:36 -07:00

math-emu

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media

media: cec.h: Fix kerneldoc

2024-05-04 10:19:59 +02:00

memory

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misc

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net

Merge tag 'nf-24-06-27' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf

2024-06-27 13:00:50 +02:00

pcmcia

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ras

tracing/treewide: Remove second parameter of __assign_str()

2024-05-22 20:14:47 -04:00

rdma

Merge tag 'mm-stable-2024-05-17-19-19' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-05-19 09:21:03 -07:00

rv

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scsi

scsi: core: Introduce the BLIST_SKIP_IO_HINTS flag

2024-06-13 21:03:13 -04:00

soc

Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

2024-05-18 12:48:37 -07:00

sound

ALSA: dmaengine: Synchronize dma channel after drop()

2024-06-11 17:13:31 +01:00

target

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trace

tracing/net_sched: NULL pointer dereference in perf_trace_qdisc_reset()

2024-06-27 11:06:30 +02:00

uapi

syscalls: fix compat_sys_io_pgetevents_time64 usage

2024-06-25 15:57:20 +02:00

ufs

Merge patch series "convert SCSI to atomic queue limits, part 1 (v3)"

2024-04-12 06:35:55 -04:00

vdso

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video

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xen

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