diff options
| author | Jinliang Zheng <alexjlzheng@tencent.com> | 2026-05-11 18:30:59 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-05-14 05:03:05 +0300 |
| commit | 6624bba469a325ecd699feae400b77cd11c76b98 (patch) | |
| tree | 65ce055ca2419c650ac1d1201243cff9c2464013 /tools/lib/python/kdoc/kdoc_parser.py | |
| parent | c6690a9030d784d3f099850800b6d5323771ca37 (diff) | |
| download | linux-6624bba469a325ecd699feae400b77cd11c76b98.tar.xz | |
macsec: use rcu_work to defer RX SA crypto cleanup out of softirq
crypto_free_aead() can internally invoke vunmap() (e.g. via
dma_free_attrs() in hardware crypto drivers such as hisi_sec2).
vunmap() must not be called from softirq context, but free_rxsa()
is an RCU callback that runs in softirq, leading to a kernel crash:
vunmap+0x4c/0x70
__iommu_dma_free+0xd0/0x138
dma_free_attrs+0xf4/0x100
sec_aead_exit+0x64/0xb8 [hisi_sec2]
crypto_destroy_tfm+0x98/0x110
free_rxsa+0x28/0x50 [macsec]
rcu_do_batch+0x184/0x460
rcu_core+0xf4/0x1f8
handle_softirqs+0x118/0x330
Use rcu_work to defer the cleanup to a workqueue. rcu_work dispatches
the worker asynchronously after the RCU grace period, so no thread
blocks waiting, and concurrent releases of multiple SAs naturally
share the same grace period.
Fixes: c09440f7dcb3 ("macsec: introduce IEEE 802.1AE driver")
Signed-off-by: Jinliang Zheng <alexjlzheng@tencent.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://patch.msgid.link/20260511153102.2640368-3-alexjlzheng@tencent.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/lib/python/kdoc/kdoc_parser.py')
0 files changed, 0 insertions, 0 deletions