Ubuntu: (Multiple Advisories) (CVE-2024-40943): Linux kernel vulnerabilities

Ubuntu: (Multiple Advisories) (CVE-2024-40943): Linux kernel vulnerabilities

Severity

4

CVSS

(AV:L/AC:M/Au:N/C:P/I:P/A:P)

Published

07/12/2024

Created

09/13/2024

Added

09/12/2024

Modified

10/02/2024

Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix races between hole punching and AIO+DIO After commit "ocfs2: return real error code in ocfs2_dio_wr_get_block", fstests/generic/300 become from always failed to sometimes failed: ======================================================================== [473.293420 ] run fstests generic/300 [475.296983 ] JBD2: Ignoring recovery information on journal [475.302473 ] ocfs2: Mounting device (253,1) on (node local, slot 0) with ordered data mode. [494.290998 ] OCFS2: ERROR (device dm-1): ocfs2_change_extent_flag: Owner 5668 has an extent at cpos 78723 which can no longer be found [494.291609 ] On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. [494.292018 ] OCFS2: File system is now read-only. [494.292224 ] (kworker/19:11,2628,19):ocfs2_mark_extent_written:5272 ERROR: status = -30 [494.292602 ] (kworker/19:11,2628,19):ocfs2_dio_end_io_write:2374 ERROR: status = -3 fio: io_u error on file /mnt/scratch/racer: Read-only file system: write offset=460849152, buflen=131072 ========================================================================= In __blockdev_direct_IO, ocfs2_dio_wr_get_block is called to add unwritten extents to a list.extents are also inserted into extent tree in ocfs2_write_begin_nolock.Then another thread call fallocate to puch a hole at one of the unwritten extent.The extent at cpos was removed by ocfs2_remove_extent().At end io worker thread, ocfs2_search_extent_list found there is no such extent at the cpos. T1T2T3 inode lock ... insert extents ... inode unlock ocfs2_fallocate __ocfs2_change_file_space inode lock lock ip_alloc_sem ocfs2_remove_inode_range inode ocfs2_remove_btree_range ocfs2_remove_extent ^---remove the extent at cpos 78723 ... unlock ip_alloc_sem inode unlock ocfs2_dio_end_io ocfs2_dio_end_io_write lock ip_alloc_sem ocfs2_mark_extent_written ocfs2_change_extent_flag ocfs2_search_extent_list ^---failed to find extent ... unlock ip_alloc_sem In most filesystems, fallocate is not compatible with racing with AIO+DIO, so fix it by adding to wait for all dio before fallocate/punch_hole like ext4.

Solution(s)

• ubuntu-upgrade-linux-image-5-15-0-1035-xilinx-zynqmp
• ubuntu-upgrade-linux-image-5-15-0-1052-gkeop
• ubuntu-upgrade-linux-image-5-15-0-1062-ibm
• ubuntu-upgrade-linux-image-5-15-0-1062-raspi
• ubuntu-upgrade-linux-image-5-15-0-1064-intel-iotg
• ubuntu-upgrade-linux-image-5-15-0-1064-nvidia
• ubuntu-upgrade-linux-image-5-15-0-1064-nvidia-lowlatency
• ubuntu-upgrade-linux-image-5-15-0-1066-gke
• ubuntu-upgrade-linux-image-5-15-0-1066-kvm
• ubuntu-upgrade-linux-image-5-15-0-1067-oracle
• ubuntu-upgrade-linux-image-5-15-0-1068-gcp
• ubuntu-upgrade-linux-image-5-15-0-1069-aws
• ubuntu-upgrade-linux-image-5-15-0-1072-azure
• ubuntu-upgrade-linux-image-5-15-0-1072-azure-fde
• ubuntu-upgrade-linux-image-5-15-0-121-generic
• ubuntu-upgrade-linux-image-5-15-0-121-generic-64k
• ubuntu-upgrade-linux-image-5-15-0-121-generic-lpae
• ubuntu-upgrade-linux-image-5-15-0-121-lowlatency
• ubuntu-upgrade-linux-image-5-15-0-121-lowlatency-64k
• ubuntu-upgrade-linux-image-5-4-0-1043-iot
• ubuntu-upgrade-linux-image-5-4-0-1051-xilinx-zynqmp
• ubuntu-upgrade-linux-image-5-4-0-1079-ibm
• ubuntu-upgrade-linux-image-5-4-0-1092-bluefield
• ubuntu-upgrade-linux-image-5-4-0-1099-gkeop
• ubuntu-upgrade-linux-image-5-4-0-1116-raspi
• ubuntu-upgrade-linux-image-5-4-0-1120-kvm
• ubuntu-upgrade-linux-image-5-4-0-1131-oracle
• ubuntu-upgrade-linux-image-5-4-0-1132-aws
• ubuntu-upgrade-linux-image-5-4-0-1136-gcp
• ubuntu-upgrade-linux-image-5-4-0-1137-azure
• ubuntu-upgrade-linux-image-5-4-0-195-generic
• ubuntu-upgrade-linux-image-5-4-0-195-generic-lpae
• ubuntu-upgrade-linux-image-5-4-0-195-lowlatency
• ubuntu-upgrade-linux-image-6-8-0-1010-gke
• ubuntu-upgrade-linux-image-6-8-0-1011-raspi
• ubuntu-upgrade-linux-image-6-8-0-1012-ibm
• ubuntu-upgrade-linux-image-6-8-0-1012-oem
• ubuntu-upgrade-linux-image-6-8-0-1012-oracle
• ubuntu-upgrade-linux-image-6-8-0-1012-oracle-64k
• ubuntu-upgrade-linux-image-6-8-0-1013-nvidia
• ubuntu-upgrade-linux-image-6-8-0-1013-nvidia-64k
• ubuntu-upgrade-linux-image-6-8-0-1013-nvidia-lowlatency
• ubuntu-upgrade-linux-image-6-8-0-1013-nvidia-lowlatency-64k
• ubuntu-upgrade-linux-image-6-8-0-1014-azure
• ubuntu-upgrade-linux-image-6-8-0-1014-azure-fde
• ubuntu-upgrade-linux-image-6-8-0-1014-gcp
• ubuntu-upgrade-linux-image-6-8-0-1015-aws
• ubuntu-upgrade-linux-image-6-8-0-44-generic
• ubuntu-upgrade-linux-image-6-8-0-44-generic-64k
• ubuntu-upgrade-linux-image-6-8-0-44-lowlatency
• ubuntu-upgrade-linux-image-6-8-0-44-lowlatency-64k
• ubuntu-upgrade-linux-image-6-8-0-45-generic
• ubuntu-upgrade-linux-image-6-8-0-45-generic-64k
• ubuntu-upgrade-linux-image-aws
• ubuntu-upgrade-linux-image-aws-lts-20-04
• ubuntu-upgrade-linux-image-aws-lts-22-04
• ubuntu-upgrade-linux-image-azure
• ubuntu-upgrade-linux-image-azure-cvm
• ubuntu-upgrade-linux-image-azure-fde
• ubuntu-upgrade-linux-image-azure-fde-lts-22-04
• ubuntu-upgrade-linux-image-azure-lts-20-04
• ubuntu-upgrade-linux-image-azure-lts-22-04
• ubuntu-upgrade-linux-image-bluefield
• ubuntu-upgrade-linux-image-gcp
• ubuntu-upgrade-linux-image-gcp-lts-20-04
• ubuntu-upgrade-linux-image-gcp-lts-22-04
• ubuntu-upgrade-linux-image-generic
• ubuntu-upgrade-linux-image-generic-64k
• ubuntu-upgrade-linux-image-generic-64k-hwe-20-04
• ubuntu-upgrade-linux-image-generic-64k-hwe-22-04
• ubuntu-upgrade-linux-image-generic-64k-hwe-24-04
• ubuntu-upgrade-linux-image-generic-hwe-18-04
• ubuntu-upgrade-linux-image-generic-hwe-20-04
• ubuntu-upgrade-linux-image-generic-hwe-22-04
• ubuntu-upgrade-linux-image-generic-hwe-24-04
• ubuntu-upgrade-linux-image-generic-lpae
• ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
• ubuntu-upgrade-linux-image-gke
• ubuntu-upgrade-linux-image-gke-5-15
• ubuntu-upgrade-linux-image-gkeop
• ubuntu-upgrade-linux-image-gkeop-5-15
• ubuntu-upgrade-linux-image-gkeop-5-4
• ubuntu-upgrade-linux-image-ibm
• ubuntu-upgrade-linux-image-ibm-classic
• ubuntu-upgrade-linux-image-ibm-lts-20-04
• ubuntu-upgrade-linux-image-ibm-lts-24-04
• ubuntu-upgrade-linux-image-intel
• ubuntu-upgrade-linux-image-intel-iotg
• ubuntu-upgrade-linux-image-kvm
• ubuntu-upgrade-linux-image-lowlatency
• ubuntu-upgrade-linux-image-lowlatency-64k
• ubuntu-upgrade-linux-image-lowlatency-64k-hwe-20-04
• ubuntu-upgrade-linux-image-lowlatency-64k-hwe-22-04
• ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
• ubuntu-upgrade-linux-image-lowlatency-hwe-20-04
• ubuntu-upgrade-linux-image-lowlatency-hwe-22-04
• ubuntu-upgrade-linux-image-nvidia
• ubuntu-upgrade-linux-image-nvidia-6-8
• ubuntu-upgrade-linux-image-nvidia-64k
• ubuntu-upgrade-linux-image-nvidia-64k-6-8
• ubuntu-upgrade-linux-image-nvidia-lowlatency
• ubuntu-upgrade-linux-image-nvidia-lowlatency-64k
• ubuntu-upgrade-linux-image-oem
• ubuntu-upgrade-linux-image-oem-20-04
• ubuntu-upgrade-linux-image-oem-20-04b
• ubuntu-upgrade-linux-image-oem-20-04c
• ubuntu-upgrade-linux-image-oem-20-04d
• ubuntu-upgrade-linux-image-oem-22-04
• ubuntu-upgrade-linux-image-oem-22-04a
• ubuntu-upgrade-linux-image-oem-22-04b
• ubuntu-upgrade-linux-image-oem-22-04c
• ubuntu-upgrade-linux-image-oem-22-04d
• ubuntu-upgrade-linux-image-oem-osp1
• ubuntu-upgrade-linux-image-oracle
• ubuntu-upgrade-linux-image-oracle-64k
• ubuntu-upgrade-linux-image-oracle-lts-20-04
• ubuntu-upgrade-linux-image-oracle-lts-22-04
• ubuntu-upgrade-linux-image-raspi
• ubuntu-upgrade-linux-image-raspi-hwe-18-04
• ubuntu-upgrade-linux-image-raspi-nolpae
• ubuntu-upgrade-linux-image-raspi2
• ubuntu-upgrade-linux-image-raspi2-hwe-18-04
• ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
• ubuntu-upgrade-linux-image-virtual
• ubuntu-upgrade-linux-image-virtual-hwe-18-04
• ubuntu-upgrade-linux-image-virtual-hwe-20-04
• ubuntu-upgrade-linux-image-virtual-hwe-22-04
• ubuntu-upgrade-linux-image-virtual-hwe-24-04
• ubuntu-upgrade-linux-image-xilinx-zynqmp

References

• https://attackerkb.com/topics/cve-2024-40943
• CVE - 2024-40943
• USN-6999-1
• USN-6999-2
• USN-7003-1
• USN-7003-2
• USN-7003-3
• USN-7003-4
• USN-7003-5
• USN-7004-1
• USN-7005-1
• USN-7005-2
• USN-7006-1
• USN-7007-1
• USN-7007-2
• USN-7007-3
• USN-7008-1
• USN-7009-1
• USN-7009-2
• USN-7019-1
• USN-7029-1

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