Description

In the Linux kernel, the following vulnerability has been resolved: mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update The rule activity update delayed work periodically traverses the list of configured rules and queries their activity from the device. As part of this task it accesses the entry pointed by 'ventry->entry', but this entry can be changed concurrently by the rehash delayed work, leading to a use-after-free [1]. Fix by closing the race and perform the activity query under the 'vregion->lock' mutex. [1] BUG: KASAN: slab-use-after-free in mlxsw_sp_acl_tcam_flower_rule_activity_get+0x121/0x140 Read of size 8 at addr ffff8881054ed808 by task kworker/0:18/181 CPU: 0 PID: 181 Comm: kworker/0:18 Not tainted 6.9.0-rc2-custom-00781-gd5ab772d32f7 #2 Hardware name: Mellanox Technologies Ltd. MSN3700/VMOD0005, BIOS 5.11 01/06/2019 Workqueue: mlxsw_core mlxsw_sp_acl_rule_activity_update_work Call Trace: <TASK> dump_stack_lvl+0xc6/0x120 print_report+0xce/0x670 kasan_report+0xd7/0x110 mlxsw_sp_acl_tcam_flower_rule_activity_get+0x121/0x140 mlxsw_sp_acl_rule_activity_update_work+0x219/0x400 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 </TASK> Allocated by task 1039: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 __kasan_kmalloc+0x8f/0xa0 __kmalloc+0x19c/0x360 mlxsw_sp_acl_tcam_entry_create+0x7b/0x1f0 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x30d/0xb50 mlxsw_sp_acl_tcam_vregion_rehash_work+0x157/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30 Freed by task 1039: kasan_save_stack+0x33/0x60 kasan_save_track+0x14/0x30 kasan_save_free_info+0x3b/0x60 poison_slab_object+0x102/0x170 __kasan_slab_free+0x14/0x30 kfree+0xc1/0x290 mlxsw_sp_acl_tcam_vchunk_migrate_all+0x3d7/0xb50 mlxsw_sp_acl_tcam_vregion_rehash_work+0x157/0x1300 process_one_work+0x8eb/0x19b0 worker_thread+0x6c9/0xf70 kthread+0x2c9/0x3b0 ret_from_fork+0x4d/0x80 ret_from_fork_asm+0x1a/0x30

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score:  N/A

NVD assessment not yet provided.

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score: N/A

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https://git.kernel.org/stable/c/1b73f6e4ea770410a937a8db98f77e52594d23a0

https://git.kernel.org/stable/c/79b5b4b18bc85b19d3a518483f9abbbe6d7b3ba4

https://git.kernel.org/stable/c/b183b915beef818a25e3154d719ca015a1ae0770

https://git.kernel.org/stable/c/b996e8699da810e4c915841d6aaef761007f933a

https://git.kernel.org/stable/c/c17976b42d546ee118ca300db559630ee96fb758

https://git.kernel.org/stable/c/e24d2487424779c02760ff50cd9021b8676e19ef

https://git.kernel.org/stable/c/feabdac2057e863d0e140a2adf3d232eb4882db4

https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

kernel.org https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html [No types assigned]

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

mlxsw: spectrum_acl_tcam: Fix possible use-after-free during activity update

The rule activity update delayed work periodically traverses the list of
configured rules and queries their activity from the device.

As part of this task it accesses the entry pointed by 'ventry->entry',
but this entry can be changed concurrently by the rehash delayed work,
leading to a use-after-free [1].

Fix by closing the race and perform the ac

kernel.org https://git.kernel.org/stable/c/1b73f6e4ea770410a937a8db98f77e52594d23a0 [No types assigned]

kernel.org https://git.kernel.org/stable/c/79b5b4b18bc85b19d3a518483f9abbbe6d7b3ba4 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b183b915beef818a25e3154d719ca015a1ae0770 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b996e8699da810e4c915841d6aaef761007f933a [No types assigned]

kernel.org https://git.kernel.org/stable/c/c17976b42d546ee118ca300db559630ee96fb758 [No types assigned]

kernel.org https://git.kernel.org/stable/c/e24d2487424779c02760ff50cd9021b8676e19ef [No types assigned]

kernel.org https://git.kernel.org/stable/c/feabdac2057e863d0e140a2adf3d232eb4882db4 [No types assigned]