Try exploiting ESP6 as well#14
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For confirming the issue on systems with only CONFIG_INET6_ESP enabled. Signed-off-by: Yao Zi <me@ziyao.cc>
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Signed-off-by: Yao Zi <me@ziyao.cc>
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…are present maillist inclusion category: bugfix The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries paged fragments (skb->data_len != 0) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate so that any skb with non-linear data is also copied, ensuring the security handler always operates on a fully linear skb. The OOM/trace handling already in place is reused. Fixes: d0d5c0c ("rxrpc: Use skb_unshare() rather than skb_cow_data()") Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com> Link: https://dirtyfrag.io/ Link: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=f4c50a4034e62ab75f1d5cdd191dd5f9c77fdff4 Link: https://lore.kernel.org/all/afKV2zGR6rrelPC7@v4bel/ Link: https://github.com/V4bel/dirtyfrag/blob/master/exp.c Link: https://seclists.org/oss-sec/2026/q2/434 Link: V4bel/dirtyfrag#14 Link: https://afflicted.sh/blog/posts/copy-fail-2.html Link: https://almalinux.org/blog/2026-05-07-dirty-frag/ Link: https://www.phoronix.com/news/Dirty-Frag-Linux Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
opsiff
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…are present maillist inclusion category: bugfix The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries paged fragments (skb->data_len != 0) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate so that any skb with non-linear data is also copied, ensuring the security handler always operates on a fully linear skb. The OOM/trace handling already in place is reused. Fixes: d0d5c0c ("rxrpc: Use skb_unshare() rather than skb_cow_data()") Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com> Link: https://dirtyfrag.io/ Link: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=f4c50a4034e62ab75f1d5cdd191dd5f9c77fdff4 Link: https://lore.kernel.org/all/afKV2zGR6rrelPC7@v4bel/ Link: https://github.com/V4bel/dirtyfrag/blob/master/exp.c Link: https://seclists.org/oss-sec/2026/q2/434 Link: V4bel/dirtyfrag#14 Link: https://afflicted.sh/blog/posts/copy-fail-2.html Link: https://almalinux.org/blog/2026-05-07-dirty-frag/ Link: https://www.phoronix.com/news/Dirty-Frag-Linux Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
opsiff
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May 8, 2026
…are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries paged fragments (skb->data_len != 0) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate so that any skb with non-linear data is also copied, ensuring the security handler always operates on a fully linear skb. The OOM/trace handling already in place is reused. Fixes: d0d5c0c ("rxrpc: Use skb_unshare() rather than skb_cow_data()") Cc: stable@vger.kernel.org Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com> Link: https://dirtyfrag.io/ Link: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=f4c50a4034e62ab75f1d5cdd191dd5f9c77fdff4 Link: https://lore.kernel.org/all/afKV2zGR6rrelPC7@v4bel/ Link: https://github.com/V4bel/dirtyfrag/blob/master/exp.c Link: https://seclists.org/oss-sec/2026/q2/434 Link: V4bel/dirtyfrag#14 Link: https://afflicted.sh/blog/posts/copy-fail-2.html Link: https://almalinux.org/blog/2026-05-07-dirty-frag/ Link: https://www.phoronix.com/news/Dirty-Frag-Linux Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
opsiff
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May 8, 2026
…are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries paged fragments (skb->data_len != 0) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate so that any skb with non-linear data is also copied, ensuring the security handler always operates on a fully linear skb. The OOM/trace handling already in place is reused. Fixes: d0d5c0c ("rxrpc: Use skb_unshare() rather than skb_cow_data()") Cc: stable@vger.kernel.org Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com> Link: https://dirtyfrag.io/ Link: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=f4c50a4034e62ab75f1d5cdd191dd5f9c77fdff4 Link: https://lore.kernel.org/all/afKV2zGR6rrelPC7@v4bel/ Link: https://github.com/V4bel/dirtyfrag/blob/master/exp.c Link: https://seclists.org/oss-sec/2026/q2/434 Link: V4bel/dirtyfrag#14 Link: https://afflicted.sh/blog/posts/copy-fail-2.html Link: https://almalinux.org/blog/2026-05-07-dirty-frag/ Link: https://www.phoronix.com/news/Dirty-Frag-Linux Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
opsiff
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to opsiff/UOS-kernel
that referenced
this pull request
May 8, 2026
…are present The DATA-packet handler in rxrpc_input_call_event() and the RESPONSE handler in rxrpc_verify_response() copy the skb to a linear one before calling into the security ops only when skb_cloned() is true. An skb that is not cloned but still carries paged fragments (skb->data_len != 0) falls through to the in-place decryption path, which binds the frag pages directly into the AEAD/skcipher SGL via skb_to_sgvec(). Extend the gate so that any skb with non-linear data is also copied, ensuring the security handler always operates on a fully linear skb. The OOM/trace handling already in place is reused. Fixes: d0d5c0c ("rxrpc: Use skb_unshare() rather than skb_cow_data()") Cc: stable@vger.kernel.org Signed-off-by: Hyunwoo Kim <imv4bel@gmail.com> Link: https://dirtyfrag.io/ Link: https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=f4c50a4034e62ab75f1d5cdd191dd5f9c77fdff4 Link: https://lore.kernel.org/all/afKV2zGR6rrelPC7@v4bel/ Link: https://github.com/V4bel/dirtyfrag/blob/master/exp.c Link: https://seclists.org/oss-sec/2026/q2/434 Link: V4bel/dirtyfrag#14 Link: https://afflicted.sh/blog/posts/copy-fail-2.html Link: https://almalinux.org/blog/2026-05-07-dirty-frag/ Link: https://www.phoronix.com/news/Dirty-Frag-Linux Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
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For confirming the issue on systems with only CONFIG_INET6_ESP enabled.