In the Linux kernel, the following vulnerability has been resolved:
nilfs2: fix potential kernel bug due to lack of writeback flag waiting
Destructive writes to a block device on which nilfs2 is mounted can cause
a kernel bug in the folio/page writeback start routine or writeback end
routine (__folio_start_writeback in the log below):
kernel BUG at mm/page-writeback.c:3070!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
...
RIP: 0010:__folio_start_writeback+0xbaa/0x10e0
Code: 25 ff 0f 00 00 0f 84 18 01 00 00 e8 40 ca c6 ff e9 17 f6 ff ff
e8 36 ca c6 ff 4c 89 f7 48 c7 c6 80 c0 12 84 e8 e7 b3 0f 00 90 <0f>
0b e8 1f ca c6 ff 4c 89 f7 48 c7 c6 a0 c6 12 84 e8 d0 b3 0f 00
...
Call Trace:
<TASK>
nilfs_segctor_do_construct+0x4654/0x69d0 [nilfs2]
nilfs_segctor_construct+0x181/0x6b0 [nilfs2]
nilfs_segctor_thread+0x548/0x11c0 [nilfs2]
kthread+0x2f0/0x390
ret_from_fork+0x4b/0x80
ret_from_fork_asm+0x1a/0x30
</TASK>
This is because when the log writer starts a writeback for segment summary
blocks or a super root block that use the backing device's page cache, it
does not wait for the ongoing folio/page writeback, resulting in an
inconsistent writeback state.
Fix this issue by waiting for ongoing writebacks when putting
folios/pages on the backing device into writeback state.
Metrics
Affected Vendors & Products
References
History
Tue, 05 Nov 2024 10:15:00 +0000
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Wed, 11 Sep 2024 18:30:00 +0000
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Wed, 11 Sep 2024 13:30:00 +0000
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MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-06-25T14:22:35.558Z
Updated: 2024-11-05T09:29:18.338Z
Reserved: 2024-06-24T13:54:11.068Z
Link: CVE-2024-37078
Vulnrichment
Updated: 2024-08-02T03:43:50.879Z
NVD
Status : Awaiting Analysis
Published: 2024-06-25T15:15:12.287
Modified: 2024-07-05T08:15:03.130
Link: CVE-2024-37078
Redhat