cbcvebase.
CVE-2024-42077
published 2024-07-29

CVE-2024-42077: In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix DIO failure due to insufficient transaction credits The code in…

PriorityP424medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
13.6th percentile
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix DIO failure due to insufficient transaction credits The code in ocfs2_dio_end_io_write() estimates number of necessary transaction credits using ocfs2_calc_extend_credits(). This however does not take into account that the IO could be arbitrarily large and can contain arbitrary number of extents. Extent tree manipulations do often extend the current transaction but not in all of the cases. For example if we have only single block extents in the tree, ocfs2_mark_extent_written() will end up calling ocfs2_replace_extent_rec() all the time and we will never extend the current transaction and eventually exhaust all the transaction credits if the IO contains many single block extents. Once that happens a WARN_ON(jbd2_handle_buffer_credits(handle) <= 0) is triggered in jbd2_journal_dirty_metadata() and subsequently OCFS2 aborts in response to this error. This was actually triggered by one of our customers on a heavily fragmented OCFS2 filesystem. To fix the issue make sure the transaction always has enough credits for one extent insert before each call of ocfs2_mark_extent_written(). Heming Zhao said: PANIC: "Kernel panic - not syncing: OCFS2: (device dm-1): panic forced after error" PID: xxx TASK: xxxx CPU: 5 COMMAND: "SubmitThread-CA" #0 machine_kexec at ffffffff8c069932 #1 __crash_kexec at ffffffff8c1338fa #2 panic at ffffffff8c1d69b9 #3 ocfs2_handle_error at ffffffffc0c86c0c [ocfs2] #4 __ocfs2_abort at ffffffffc0c88387 [ocfs2] #5 ocfs2_journal_dirty at ffffffffc0c51e98 [ocfs2] #6 ocfs2_split_extent at ffffffffc0c27ea3 [ocfs2] #7 ocfs2_change_extent_flag at ffffffffc0c28053 [ocfs2] #8 ocfs2_mark_extent_written at ffffffffc0c28347 [ocfs2] #9 ocfs2_dio_end_io_write at ffffffffc0c2bef9 [ocfs2] #10 ocfs2_dio_end_io at ffffffffc0c2c0f5 [ocfs2] #11 dio_complete at ffffffff8c2b9fa7 #12 do_blockdev_direct_IO at ffffffff8c2bc09f #13 ocfs2_direct_IO at ffffffffc0c2b653 [ocfs2] #14 generic_file_

Affected

27 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.98-1 (bookworm)linux 6.1.98-1 (bookworm)
debianlinux-6.1< linux 6.1.98-1 (bookworm)linux 6.1.98-1 (bookworm)
linuxlinux
linuxlinux>= c15471f79506830f80eca0e7fe09b8213953ab5f < a68b896aa56e435506453ec8835bc991ec3ae687a68b896aa56e435506453ec8835bc991ec3ae687
linuxlinux>= c15471f79506830f80eca0e7fe09b8213953ab5f < 320273b5649bbcee87f9e65343077189699d2a7a320273b5649bbcee87f9e65343077189699d2a7a
linuxlinux>= c15471f79506830f80eca0e7fe09b8213953ab5f < 9ea2d1c6789722d58ec191f14f9a02518d55b6b49ea2d1c6789722d58ec191f14f9a02518d55b6b4
linuxlinux>= c15471f79506830f80eca0e7fe09b8213953ab5f < c05ffb693bfb42a48ef3ee88a55b57392984e111c05ffb693bfb42a48ef3ee88a55b57392984e111
linuxlinux>= c15471f79506830f80eca0e7fe09b8213953ab5f < 331d1079d58206ff7dc5518185f800b412f89bc6331d1079d58206ff7dc5518185f800b412f89bc6
linuxlinux>= c15471f79506830f80eca0e7fe09b8213953ab5f < be346c1a6eeb49d8fda827d2a9522124c2f72f36be346c1a6eeb49d8fda827d2a9522124c2f72f36
linuxlinux_kernel< 4.64.6
linuxlinux_kernel>= 0 < 5.10.221-15.10.221-1
linuxlinux_kernel>= 0 < 6.1.98-16.1.98-1
linuxlinux_kernel>= 0 < 6.9.8-16.9.8-1
linuxlinux_kernel>= 0 < 6.9.8-16.9.8-1
linuxlinux_kernel>= 0 < 5.4.0-202.2225.4.0-202.222
linuxlinux_kernel>= 0 < 5.15.0-121.1315.15.0-121.131
linuxlinux_kernel>= 0 < 6.8.0-48.486.8.0-48.48
linuxlinux_kernel>= 0 < 4.15.0-232.2444.15.0-232.244
linuxlinux_kernel>= 4.7 < 5.10.2215.10.221
linuxlinux_kernel>= 5.11 < 5.15.1625.15.162
linuxlinux_kernel>= 5.16 < 6.1.976.1.97
linuxlinux_kernel>= 6.2 < 6.6.376.6.37
linuxlinux_kernel>= 6.7 < 6.9.86.9.8
msrcazl3_kernel_6.6.35.1-5_on_azure_linux_3.0
msrcazl3_kernel_6.6.43.1-7_on_azure_linux_3.0

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_ubuntu6.3MEDIUM
vendor_debian5.5MEDIUM
vendor_msrc5.5MEDIUM
vendor_redhat5.5MEDIUM
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