CVE-2023-53857

/// Technical description

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

bpf: bpf_sk_storage: Fix invalid wait context lockdep report

'./test_progs -t test_local_storage' reported a splat:

[ 27.137569] =============================

[ 27.138122] [ BUG: Invalid wait context ]

[ 27.138650] 6.5.0-03980-gd11ae1b16b0a #247 Tainted: G O

[ 27.139542] -----------------------------

[ 27.140106] test_progs/1729 is trying to lock:

[ 27.140713] ffff8883ef047b88 (stock_lock){-.-.}-{3:3}, at: local_lock_acquire+0x9/0x130

[ 27.141834] other info that might help us debug this:

[ 27.142437] context-{5:5}

[ 27.142856] 2 locks held by test_progs/1729:

[ 27.143352] #0: ffffffff84bcd9c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x40

[ 27.144492] #1: ffff888107deb2c0 (&storage->lock){..-.}-{2:2}, at: bpf_local_storage_update+0x39e/0x8e0

[ 27.145855] stack backtrace:

[ 27.146274] CPU: 0 PID: 1729 Comm: test_progs Tainted: G O 6.5.0-03980-gd11ae1b

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References