Breno Leitao 12079a59ce net: Implement fault injection forcing skb reallocation ... Introduce a fault injection mechanism to force skb reallocation. The primary goal is to catch bugs related to pointer invalidation after potential skb reallocation. The fault injection mechanism aims to identify scenarios where callers retain pointers to various headers in the skb but fail to reload these pointers after calling a function that may reallocate the data. This type of bug can lead to memory corruption or crashes if the old, now-invalid pointers are used. By forcing reallocation through fault injection, we can stress-test code paths and ensure proper pointer management after potential skb reallocations. Add a hook for fault injection in the following functions: * pskb_trim_rcsum() * pskb_may_pull_reason() * pskb_trim() As the other fault injection mechanism, protect it under a debug Kconfig called CONFIG_FAIL_SKB_REALLOC. This patch was *heavily* inspired by Jakub's proposal from: https://lore.kernel.org/all/20240719174140.47a868e6@kernel.org/ CC: Akinobu Mita <akinobu.mita@gmail.com> Suggested-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Breno Leitao <leitao@debian.org> Reviewed-by: Akinobu Mita <akinobu.mita@gmail.com> Acked-by: Paolo Abeni <pabeni@redhat.com> Acked-by: Guillaume Nault <gnault@redhat.com> Link: https://patch.msgid.link/20241107-fault_v6-v6-1-1b82cb6ecacd@debian.org Signed-off-by: Paolo Abeni <pabeni@redhat.com>		2024-11-12 12:05:33 +01:00
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fault-injection.rst	net: Implement fault injection forcing skb reallocation	2024-11-12 12:05:33 +01:00
index.rst	Fixed case issue with 'fault-injection' in documentation	2024-02-21 13:44:21 -07:00
notifier-error-inject.rst	docs: notifier-error-inject: Correct test's name	2022-10-07 10:32:16 -06:00
nvme-fault-injection.rst	nvme: rename and document nvme_end_request	2020-08-21 17:14:28 -06:00
provoke-crashes.rst	lkdtm: replace ll_rw_block with submit_bh	2023-05-31 20:26:57 +01:00