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bpf: Nested rcu critical sections #6380

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@kernel-patches-daemon-bpf-rc kernel-patches-daemon-bpf-rc bot commented Nov 17, 2025

Pull request for series with
subject: bpf: Nested rcu critical sections
version: 2
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478

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kernel-patches-daemon-bpf-rc bot commented Nov 17, 2025

Upstream branch: 4722981
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 18, 2025

Upstream branch: 7dc211c
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 18, 2025

Upstream branch: ec12ab2
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 19, 2025

Upstream branch: d6ec090
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 19, 2025

Upstream branch: d6ec090
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 20, 2025

Upstream branch: d088da9
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 20, 2025

Upstream branch: e0940c6
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 21, 2025

Upstream branch: 792f258
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 22, 2025

Upstream branch: 878ee3c
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 22, 2025

Upstream branch: ae24fc8
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 22, 2025

Upstream branch: b7f7d76
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 22, 2025

Upstream branch: 4dd3a48
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 22, 2025

Upstream branch: 4dd3a48
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

@puranjaymohan
bpf: support nested rcu critical sections
8603526 
Currently, nested rcu critical sections are rejected by the verifier and
rcu_lock state is managed by a boolean variable. Add support for nested
rcu critical sections by make active_rcu_locks a counter similar to
active_preempt_locks. bpf_rcu_read_lock() increments this counter and
bpf_rcu_read_unlock() decrements it, MEM_RCU -> PTR_UNTRUSTED transition
happens when active_rcu_locks drops to 0.

Signed-off-by: Puranjay Mohan <[email protected]>
Acked-by: Eduard Zingerman <[email protected]>
@puranjaymohan
selftests: bpf: Add tests for unbalanced rcu_read_lock
62c3292 
As verifier now supports nested rcu critical sections, add new test
cases to make sure unbalanced usage of rcu_read_lock()/unlock() is
rejected.

Signed-off-by: Puranjay Mohan <[email protected]>
Acked-by: Eduard Zingerman <[email protected]>
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kernel-patches-daemon-bpf-rc bot commented Nov 22, 2025

Upstream branch: 8f7cf30
series: https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478
version: 2

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kernel-patches-daemon-bpf-rc bot commented Nov 22, 2025

At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=1024478 irrelevant now. Closing PR.

@kernel-patches-daemon-bpf-rc kernel-patches-daemon-bpf-rc bot deleted the series/1024478=>bpf-next branch November 22, 2025 03:23
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