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9ba74e6c9e
We have 100+ syzbot reports about netns being dismantled too soon, still unresolved as of today. We think a missing get_net() or an extra put_net() is the root cause. In order to find the bug(s), and be able to spot future ones, this patch adds CONFIG_NET_NS_REFCNT_TRACKER and new helpers to precisely pair all put_net() with corresponding get_net(). To use these helpers, each data structure owning a refcount should also use a "netns_tracker" to pair the get and put. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
19 lines
548 B
Text
19 lines
548 B
Text
# SPDX-License-Identifier: GPL-2.0-only
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config NET_DEV_REFCNT_TRACKER
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bool "Enable net device refcount tracking"
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depends on DEBUG_KERNEL && STACKTRACE_SUPPORT
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select REF_TRACKER
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default n
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help
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Enable debugging feature to track device references.
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This adds memory and cpu costs.
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config NET_NS_REFCNT_TRACKER
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bool "Enable networking namespace refcount tracking"
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depends on DEBUG_KERNEL && STACKTRACE_SUPPORT
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select REF_TRACKER
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default n
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help
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Enable debugging feature to track netns references.
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This adds memory and cpu costs.
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