CVE-2024-26931

scsi: qla2xxx: Fix command flush on cable pull

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved:

scsi: qla2xxx: Fix command flush on cable pull

System crash due to command failed to flush back to SCSI layer.

BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 0 P4D 0
Oops: 0000 [#1] SMP NOPTI
CPU: 27 PID: 793455 Comm: kworker/u130:6 Kdump: loaded Tainted: G OE --------- - - 4.18.0-372.9.1.el8.x86_64 #1
Hardware name: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 09/03/2021
Workqueue: nvme-wq nvme_fc_connect_ctrl_work [nvme_fc]
RIP: 0010:__wake_up_common+0x4c/0x190
Code: 24 10 4d 85 c9 74 0a 41 f6 01 04 0f 85 9d 00 00 00 48 8b 43 08 48 83 c3 08 4c 8d 48 e8 49 8d 41 18 48 39 c3 0f 84 f0 00 00 00 <49> 8b 41 18 89 54 24 08 31 ed 4c 8d 70 e8 45 8b 29 41 f6 c5 04 75
RSP: 0018:ffff95f3e0cb7cd0 EFLAGS: 00010086
RAX: 0000000000000000 RBX: ffff8b08d3b26328 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8b08d3b26320
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffffffffffe8
R10: 0000000000000000 R11: ffff95f3e0cb7a60 R12: ffff95f3e0cb7d20
R13: 0000000000000003 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8b2fdf6c0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000002f1e410002 CR4: 00000000007706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
__wake_up_common_lock+0x7c/0xc0
qla_nvme_ls_req+0x355/0x4c0 [qla2xxx]
qla2xxx [0000:12:00.1]-f084:3: qlt_free_session_done: se_sess 0000000000000000 / sess ffff8ae1407ca000 from port 21:32:00:02:ac:07:ee:b8 loop_id 0x02 s_id 01:02:00 logout 1 keep 0 els_logo 0
? __nvme_fc_send_ls_req+0x260/0x380 [nvme_fc]
qla2xxx [0000:12:00.1]-207d:3: FCPort 21:32:00:02:ac:07:ee:b8 state transitioned from ONLINE to LOST - portid=010200.
? nvme_fc_send_ls_req.constprop.42+0x1a/0x45 [nvme_fc]
qla2xxx [0000:12:00.1]-2109:3: qla2x00_schedule_rport_del 21320002ac07eeb8. rport ffff8ae598122000 roles 1
? nvme_fc_connect_ctrl_work.cold.63+0x1e3/0xa7d [nvme_fc]
qla2xxx [0000:12:00.1]-f084:3: qlt_free_session_done: se_sess 0000000000000000 / sess ffff8ae14801e000 from port 21:32:01:02:ad:f7:ee:b8 loop_id 0x04 s_id 01:02:01 logout 1 keep 0 els_logo 0
? __switch_to+0x10c/0x450
? process_one_work+0x1a7/0x360
qla2xxx [0000:12:00.1]-207d:3: FCPort 21:32:01:02:ad:f7:ee:b8 state transitioned from ONLINE to LOST - portid=010201.
? worker_thread+0x1ce/0x390
? create_worker+0x1a0/0x1a0
qla2xxx [0000:12:00.1]-2109:3: qla2x00_schedule_rport_del 21320102adf7eeb8. rport ffff8ae3b2312800 roles 70
? kthread+0x10a/0x120
qla2xxx [0000:12:00.1]-2112:3: qla_nvme_unregister_remote_port: unregister remoteport on ffff8ae14801e000 21320102adf7eeb8
? set_kthread_struct+0x40/0x40
qla2xxx [0000:12:00.1]-2110:3: remoteport_delete of ffff8ae14801e000 21320102adf7eeb8 completed.
? ret_from_fork+0x1f/0x40
qla2xxx [0000:12:00.1]-f086:3: qlt_free_session_done: waiting for sess ffff8ae14801e000 logout

The system was under memory stress where driver was not able to allocate an
SRB to carry out error recovery of cable pull. The failure to flush causes
upper layer to start modifying scsi_cmnd. When the system frees up some
memory, the subsequent cable pull trigger another command flush. At this
point the driver access a null pointer when attempting to DMA unmap the
SGL.

Add a check to make sure commands are flush back on session tear down to
prevent the null pointer access.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: scsi: qla2xxx: corrige el vaciado del comando al tirar del cable. Fallo del sistema debido a que el comando no pudo volver a vaciarse a la capa SCSI. ERROR: no se puede manejar la desreferencia del puntero NULL del kernel en 0000000000000000 PGD 0 P4D 0 Ups: 0000 [#1] SMP NOPTI CPU: 27 PID: 793455 Comm: kworker/u130:6 Kdump: cargado Contaminado: G OE ------ --- - - 4.18.0-372.9.1.el8.x86_64 #1 Nombre de hardware: HPE ProLiant DL360 Gen10/ProLiant DL360 Gen10, BIOS U32 03/09/2021 Cola de trabajo: nvme-wq nvme_fc_connect_ctrl_work [nvme_fc] RIP: 0010: __wake_up_common+0x4c/0x190 Código: 24 10 4d 85 c9 74 0a 41 f6 01 04 0f 85 9d 00 00 00 48 8b 43 08 48 83 c3 08 4c 8d 48 e8 49 8d 41 18 48 c3 0f 84 f0 00 00 00 < 49> 8b 41 18 89 54 24 08 31 ed 4c 8d 70 e8 45 8b 29 41 f6 c5 04 75 RSP: 0018:ffff95f3e0cb7cd0 EFLAGS: 00010086 RAX: 0000000000000000 RBX: ffff8b08d3b26328 RCX: 00000000000000000 RDX: 0000000000000001 RSI: 00000000000000003 RDI: ffff8b08d3b26320 RBP : 0000000000000001 R08: 0000000000000000 R09: ffffffffffffffe8 R10: 0000000000000000 R11: ffff95f3e0cb7a60 R12: ffff95f3e0cb7d20 R13: 0000003 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8b2fdf6c0000(0000) knlGS:0000000000000000 CS: 0 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000002f1e410002 CR4: 00000000007706e0 DR0: 00000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 PKRU: 55555554 Seguimiento de llamadas: __wake_up_common_lock+0x7c/0xc0 qla_nvme_ls_req+ 0x355/0x4c0 [qla2xxx] qla2xxx [0000:12:00.1]-f084:3: qlt_free_session_done: se_sess 0000000000000000 / sess ffff8ae1407ca000 desde el puerto 21:32:00:02:ac:07:ee:b8 loop_id 0x02 s_id 01:02:00 cerrar sesión 1 mantener 0 els_logo 0 ? __nvme_fc_send_ls_req+0x260/0x380 [nvme_fc] qla2xxx [0000:12:00.1]-207d:3: FCPort 21:32:00:02:ac:07:ee:b8 el estado pasó de EN LÍNEA a PERDIDO - portid=010200. ? nvme_fc_send_ls_req.constprop.42+0x1a/0x45 [nvme_fc] qla2xxx [0000:12:00.1]-2109:3: qla2x00_schedule_rport_del 21320002ac07eeb8. informe ffff8ae598122000 roles 1 ? nvme_fc_connect_ctrl_work.cold.63+0x1e3/0xa7d [nvme_fc] qla2xxx [0000:12:00.1]-f084:3: qlt_free_session_done: se_sess 0000000000000000 / sess ffff8ae14801e000 desde el puerto 21: 32:01:02:ad:f7:ee:b8 loop_id 0x04 s_id 01:02:01 cerrar sesión 1 mantener 0 els_logo 0? __cambiar_a+0x10c/0x450 ? Process_one_work+0x1a7/0x360 qla2xxx [0000:12:00.1]-207d:3: FCPort 21:32:01:02:ad:f7:ee:b8 el estado pasó de EN LÍNEA a PERDIDO - portid=010201. ? hilo_trabajador+0x1ce/0x390? create_worker+0x1a0/0x1a0 qla2xxx [0000:12:00.1]-2109:3: qla2x00_schedule_rport_del 21320102adf7eeb8. informe ffff8ae3b2312800 roles 70 ? kthread+0x10a/0x120 qla2xxx [0000:12:00.1]-2112:3: qla_nvme_unregister_remote_port: cancelar el registro del puerto remoto en ffff8ae14801e000 21320102adf7eeb8? set_kthread_struct+0x40/0x40 qla2xxx [0000:12:00.1]-2110:3: Remoteport_delete de ffff8ae14801e000 21320102adf7eeb8 completado. ? ret_from_fork+0x1f/0x40 qla2xxx [0000:12:00.1]-f086:3: qlt_free_session_done: esperando sess ffff8ae14801e000 cerrar sesión El sistema estaba bajo estrés de memoria y el controlador no pudo asignar un SRB para llevar a cabo la recuperación de errores de extracción del cable. La falla al vaciar hace que la capa superior comience a modificar scsi_cmnd. Cuando el sistema libera algo de memoria, el siguiente tirón del cable activa otro comando de descarga. En este punto, el controlador accede a un puntero nulo cuando intenta desasignar DMA el SGL. Agregue una verificación para asegurarse de que los comandos se vuelvan a borrar al cerrar la sesión para evitar el acceso al puntero nulo.

*Credits: N/A

CVSS Scores

Red Hatv3.1 5.5

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-19 CVE Reserved
2024-05-01 CVE Published
2024-05-01 EPSS Updated
2024-09-11 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (13)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/b73377124f56d2fec154737c2f8d2e839c237d5a	2024-04-13
https://git.kernel.org/stable/c/d7a68eee87b05d4e29419e6f151aef99314970a9	2024-04-13
https://git.kernel.org/stable/c/67b2d35853c2da25a8ca1c4190a5e96d3083c2ac	2024-04-13
https://git.kernel.org/stable/c/a859f6a8f4234b8ef62862bf7a92f1af5f8cd47a	2024-04-10
https://git.kernel.org/stable/c/09c0ac18cac206ed1218b1fe6c1a0918e5ea9211	2024-04-03
https://git.kernel.org/stable/c/8de1584ec4fe0ebea33c273036e7e0a05e65c81d	2024-04-03
https://git.kernel.org/stable/c/8f0d32004e3a572bb77e6c11c2797c87f8c9703d	2024-04-03
https://git.kernel.org/stable/c/ec7587eef003cab15a13446d67c3adb88146a150	2024-04-03
https://git.kernel.org/stable/c/a27d4d0e7de305def8a5098a614053be208d1aa1	2024-03-10

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2024-26931	2024-09-24
https://bugzilla.redhat.com/show_bug.cgi?id=2278245	2024-09-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 4.19.312 Search vendor "Linux" for product "Linux Kernel" and version " < 4.19.312"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.4.274 Search vendor "Linux" for product "Linux Kernel" and version " < 5.4.274"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.10.215 Search vendor "Linux" for product "Linux Kernel" and version " < 5.10.215"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 5.15.154 Search vendor "Linux" for product "Linux Kernel" and version " < 5.15.154"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.1.84 Search vendor "Linux" for product "Linux Kernel" and version " < 6.1.84"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.6.24 Search vendor "Linux" for product "Linux Kernel" and version " < 6.6.24"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.7.12 Search vendor "Linux" for product "Linux Kernel" and version " < 6.7.12"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.8.3 Search vendor "Linux" for product "Linux Kernel" and version " < 6.8.3"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				< 6.9 Search vendor "Linux" for product "Linux Kernel" and version " < 6.9"		en		Affected