CVE-2026-31563

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

net: macb: Use dev_consume_skb_any() to free TX SKBs

The napi_consume_skb() function is not intended to be called in an IRQ

disabled context. However, after commit 6bc8a5098bf4 ("net: macb: Fix

tx_ptr_lock locking"), the freeing of TX SKBs is performed with IRQs

disabled. To resolve the following call trace, use dev_consume_skb_any()

for freeing TX SKBs:

WARNING: kernel/softirq.c:430 at __local_bh_enable_ip+0x174/0x188, CPU#0: ksoftirqd/0/15

Modules linked in:

CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 7.0.0-rc4-next-20260319-yocto-standard-dirty #37 PREEMPT

Hardware name: ZynqMP ZCU102 Rev1.1 (DT)

pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)

pc : __local_bh_enable_ip+0x174/0x188

lr : local_bh_enable+0x24/0x38

sp : ffff800082b3bb10

x29: ffff800082b3bb10 x28: ffff0008031f3c00 x27: 000000000011ede0

x26: ffff000800a7ff00 x25: ffff800083937ce8 x24: 0000000000017a80

x23: ffff000803243a78 x22: 0000000000000040 x21: 0000000000000000

x20: ffff000800394c80 x19: 0000000000000200 x18: 0000000000000001

x17: 0000000000000001 x16: ffff000803240000 x15: 0000000000000000

x14: ffffffffffffffff x13: 0000000000000028 x12: ffff000800395650

x11: ffff8000821d1528 x10: ffff800081c2bc08 x9 : ffff800081c1e258

x8 : 0000000100000301 x7 : ffff8000810426ec x6 : 0000000000000000

x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000

x2 : 0000000000000008 x1 : 0000000000000200 x0 : ffff8000810428dc

Call trace:

__local_bh_enable_ip+0x174/0x188 (P)

local_bh_enable+0x24/0x38

skb_attempt_defer_free+0x190/0x1d8

napi_consume_skb+0x58/0x108

macb_tx_poll+0x1a4/0x558

__napi_poll+0x50/0x198

net_rx_action+0x1f4/0x3d8

handle_softirqs+0x16c/0x560

run_ksoftirqd+0x44/0x80

smpboot_thread_fn+0x1d8/0x338

kthread+0x120/0x150

ret_from_fork+0x10/0x20

irq event stamp: 29751

hardirqs last enabled at (29750): [<ffff8000813be184>] _raw_spin_unlock_irqrestore+0x44/0x88

hardirqs last disabled at (29751): [<ffff8000813bdf60>] _raw_spin_lock_irqsave+0x38/0x98

softirqs last enabled at (29150): [<ffff8000800f1aec>] handle_softirqs+0x504/0x560

softirqs last disabled at (29153): [<ffff8000800f2fec>] run_ksoftirqd+0x44/0x80