7.8

CVE-2022-49082

scsi: mpt3sas: Fix use after free in _scsih_expander_node_remove()

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

scsi: mpt3sas: Fix use after free in _scsih_expander_node_remove()

The function mpt3sas_transport_port_remove() called in
_scsih_expander_node_remove() frees the port field of the sas_expander
structure, leading to the following use-after-free splat from KASAN when
the ioc_info() call following that function is executed (e.g. when doing
rmmod of the driver module):

[ 3479.371167] ==================================================================
[ 3479.378496] BUG: KASAN: use-after-free in _scsih_expander_node_remove+0x710/0x750 [mpt3sas]
[ 3479.386936] Read of size 1 at addr ffff8881c037691c by task rmmod/1531
[ 3479.393524]
[ 3479.395035] CPU: 18 PID: 1531 Comm: rmmod Not tainted 5.17.0-rc8+ #1436
[ 3479.401712] Hardware name: Supermicro Super Server/H12SSL-NT, BIOS 2.1 06/02/2021
[ 3479.409263] Call Trace:
[ 3479.411743]  <TASK>
[ 3479.413875]  dump_stack_lvl+0x45/0x59
[ 3479.417582]  print_address_description.constprop.0+0x1f/0x120
[ 3479.423389]  ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas]
[ 3479.429469]  kasan_report.cold+0x83/0xdf
[ 3479.433438]  ? _scsih_expander_node_remove+0x710/0x750 [mpt3sas]
[ 3479.439514]  _scsih_expander_node_remove+0x710/0x750 [mpt3sas]
[ 3479.445411]  ? _raw_spin_unlock_irqrestore+0x2d/0x40
[ 3479.452032]  scsih_remove+0x525/0xc90 [mpt3sas]
[ 3479.458212]  ? mpt3sas_expander_remove+0x1d0/0x1d0 [mpt3sas]
[ 3479.465529]  ? down_write+0xde/0x150
[ 3479.470746]  ? up_write+0x14d/0x460
[ 3479.475840]  ? kernfs_find_ns+0x137/0x310
[ 3479.481438]  pci_device_remove+0x65/0x110
[ 3479.487013]  __device_release_driver+0x316/0x680
[ 3479.493180]  driver_detach+0x1ec/0x2d0
[ 3479.498499]  bus_remove_driver+0xe7/0x2d0
[ 3479.504081]  pci_unregister_driver+0x26/0x250
[ 3479.510033]  _mpt3sas_exit+0x2b/0x6cf [mpt3sas]
[ 3479.516144]  __x64_sys_delete_module+0x2fd/0x510
[ 3479.522315]  ? free_module+0xaa0/0xaa0
[ 3479.527593]  ? __cond_resched+0x1c/0x90
[ 3479.532951]  ? lockdep_hardirqs_on_prepare+0x273/0x3e0
[ 3479.539607]  ? syscall_enter_from_user_mode+0x21/0x70
[ 3479.546161]  ? trace_hardirqs_on+0x1c/0x110
[ 3479.551828]  do_syscall_64+0x35/0x80
[ 3479.556884]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 3479.563402] RIP: 0033:0x7f1fc482483b
...
[ 3479.943087] ==================================================================

Fix this by introducing the local variable port_id to store the port ID
value before executing mpt3sas_transport_port_remove(). This local variable
is then used in the call to ioc_info() instead of dereferencing the freed
port structure.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.34
Linux ≫ Linux Kernel Version >= 5.16 < 5.16.20
Linux ≫ Linux Kernel Version >= 5.17 < 5.17.3
Linux ≫ Linux Kernel Version5.18 Updaterc1
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.146
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/17d66b1c92bcb41e72271ec60069d3684aaa1c9c
Patch
https://git.kernel.org/stable/c/1bb8a7fc64d63ec818e367e1b37676ea2ef2d20c
Patch
https://git.kernel.org/stable/c/25c1353dca74ad7cf3fd7ce258fe7c957a147d5e
Patch
https://git.kernel.org/stable/c/87d663d40801dffc99a5ad3b0188ad3e2b4d1557
Patch