CVE-2024-37078

nilfs2: fix potential kernel bug due to lack of writeback flag waiting

State: Published
Severity: 7.8 High
Published: Jun 25, 2024
Updated: Aug 5, 2026
Reserved: Jun 24, 2024

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 95f6f81e50d858a7c9aa7c795ec14a0ac3819118Affected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before a75b8f493dfc48aa38c518430bd9e03b53bffebeAffected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 0ecfe3a92869a59668d27228dabbd7965e83567fAffected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 33900d7eae616647e179eee1c66ebe654ee39627Affected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 271dcd977ccda8c7a26e360425ae7b4db7d2ecc0Affected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 614d397be0cf43412b3f94a0f6460eddced8ce92Affected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 1f3bff69f1214fe03a02bc650d5bbfaa6e65ae7dAffected 9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before a4ca369ca221bb7e06c725792ac107f0e48e82e7Affected
LinuxLinux	2.6.30Affected before 2.6.30Not affected 4.19.317 through 4.19.Not affected 5.4.279 through 5.4.Not affected 5.10.221 through 5.10.Not affected 5.15.162 through 5.15.Not affected 6.1.95 through 6.1.Not affected 6.6.35 through 6.6.Not affected 6.9.5 through 6.9.*Not affected 6.10 and laterNot affected

Product

Versions

LinuxLinux

9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 95f6f81e50d858a7c9aa7c795ec14a0ac3819118Affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before a75b8f493dfc48aa38c518430bd9e03b53bffebeAffected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 0ecfe3a92869a59668d27228dabbd7965e83567fAffected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 33900d7eae616647e179eee1c66ebe654ee39627Affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 271dcd977ccda8c7a26e360425ae7b4db7d2ecc0Affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 614d397be0cf43412b3f94a0f6460eddced8ce92Affected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before 1f3bff69f1214fe03a02bc650d5bbfaa6e65ae7dAffected
9ff05123e3bfbb1d2b68ba1d9bf1f7d1dffc1453 to before a4ca369ca221bb7e06c725792ac107f0e48e82e7Affected

LinuxLinux

2.6.30Affected
before 2.6.30Not affected
4.19.317 through 4.19.*Not affected
5.4.279 through 5.4.*Not affected
5.10.221 through 5.10.*Not affected
5.15.162 through 5.15.*Not affected
6.1.95 through 6.1.*Not affected
6.6.35 through 6.6.*Not affected
6.9.5 through 6.9.*Not affected
6.10 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.