CVE: CVE-2022-48835
Published: 2024-07-16
Description: In the Linux kernel, the following vulnerability has been resolved:

scsi: mpt3sas: Page fault in reply q processing

A page fault was encountered in mpt3sas on a LUN reset error path:

[  145.763216] mpt3sas_cm1: Task abort tm failed: handle(0x0002),timeout(30) tr_method(0x0) smid(3) msix_index(0)
[  145.778932] scsi 1:0:0:0: task abort: FAILED scmd(0x[PII_REDACTED]ba29a2)
[  145.817307] scsi 1:0:0:0: attempting device reset! scmd(0x[PII_REDACTED]ba29a2)
[  145.827253] scsi 1:0:0:0: [sg1] tag#2 CDB: Receive Diagnostic 1c 01 01 ff fc 00
[  145.837617] scsi target1:0:0: handle(0x0002), sas_address(0x500605b0000272b9), phy(0)
[  145.848598] scsi target1:0:0: enclosure logical id(0x500605b0000272b8), slot(0)
[  149.858378] mpt3sas_cm1: Poll ReplyDescriptor queues for completion of smid(0), task_type(0x05), handle(0x0002)
[  149.875202] BUG: unable to handle page fault for address: 00000007fffc445d
[  149.885617] #PF: supervisor read access in kernel mode
[  149.894346] #PF: error_code(0x0000) - not-present page
[  149.903123] PGD 0 P4D 0
[  149.909387] Oops: 0000 [#1] PREEMPT SMP NOPTI
[  149.917417] CPU: 24 PID: 3512 Comm: scsi_eh_1 Kdump: loaded Tainted: G S         O      5.10.89-altav-1 #1
[  149.934327] Hardware name: DDN           200NVX2             /200NVX2-MB          , BIOS ATHG2.2.02.01 09/10/2021
[  149.951871] RIP: 0010:_base_process_reply_queue+0x4b/0x900 [mpt3sas]
[  149.961889] Code: 0f 84 22 02 00 00 8d 48 01 49 89 fd 48 8d 57 38 f0 0f b1 4f 38 0f 85 d8 01 00 00 49 8b 45 10 45 31 e4 41 8b 55 0c 48 8d 1c d0 <0f> b6 03 83 e0 0f 3c 0f 0f 85 a2 00 00 00 e9 e6 01 00 00 0f b7 ee
[  149.991952] RSP: 0018:ffffc9000f1ebcb8 EFLAGS: 00010246
[  150.000937] RAX: [PII_REDACTED] RBX: 00000007fffc445d RCX:[PII_REDACTED]48f071
[  150.011841] RDX: 00000000ffff8881 RSI: [PII_REDACTED] RDI: ffff888125ed50d8
[  150.022670] RBP: [PII_REDACTED] R08: [PII_REDACTED] R09: c0000000ffff7fff
[  150.033445] R10: ffffc9000f1ebb68 R11: ffffc9000f1ebb60 R12: [PII_REDACTED]
[  150.044204] R13: ffff888125ed50d8 R14: [PII_REDACTED] R15: 34cdc00034cdea80
[  150.054963] FS:  [PII_REDACTED](0000) GS:ffff88dfaf200000(0000) knlGS:[PII_REDACTED]
[  150.066715] CS:  0010 DS: 0000 ES: 0000 CR0: [PII_REDACTED]
[  150.076078] CR2: 00000007fffc445d CR3:[PII_REDACTED]48a006 CR4:[PII_REDACTED]770ee0
[  150.086887] DR0: [PII_REDACTED] DR1: [PII_REDACTED] DR2: [PII_REDACTED]
[  150.097670] DR3: [PII_REDACTED] DR6: 00000000fffe0ff0 DR7: [PII_REDACTED]
[  150.108323] PKRU: 55555554
[  150.114690] Call Trace:
[  150.120497]  ? printk+0x48/0x4a
[  150.127049]  mpt3sas_scsih_issue_tm.cold.114+0x2e/0x2b3 [mpt3sas]
[  150.136453]  mpt3sas_scsih_issue_locked_tm+0x86/0xb0 [mpt3sas]
[  150.145759]  scsih_dev_reset+0xea/0x300 [mpt3sas]
[  150.153891]  scsi_eh_ready_devs+0x541/0x9e0 [scsi_mod]
[  150.162206]  ? __scsi_host_match+0x20/0x20 [scsi_mod]
[  150.170406]  ? scsi_try_target_reset+0x90/0x90 [scsi_mod]
[  150.178925]  ? blk_mq_tagset_busy_iter+0x45/0x60
[  150.186638]  ? scsi_try_target_reset+0x90/0x90 [scsi_mod]
[  150.195087]  scsi_error_handler+0x3a5/0x4a0 [scsi_mod]
[  150.203206]  ? __schedule+0x1e9/0x610
[  150.209783]  ? scsi_eh_get_sense+0x210/0x210 [scsi_mod]
[  150.217924]  kthread+0x12e/0x150
[  150.224041]  ? kthread_worker_fn+0x130/0x130
[  150.231206]  ret_from_fork+0x1f/0x30

This is caused by mpt3sas_base_sync_reply_irqs() using an invalid reply_q
pointer outside of the list_for_each_entry() loop. At the end of the full
list traversal the pointer is invalid.

Move the _base_process_reply_queue() call inside of the loop.
CVSS Score: 5.5 (MEDIUM)
CWE: CWE-763
References: https://git.kernel.org/stable/c/0cd2dd4bcf4abc812148c4943f966a3c8dccb00f; https://git.kernel.org/stable/c/3916e33b917581e2b2086e856c291cb86ea98a05; https://git.kernel.org/stable/c/69ad4ef868c1fc7609daa235dfa46d28ba7a3ba3