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[199.106.103.254]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-30296dcb6e9sm18592694eec.16.2026.05.18.21.07.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 18 May 2026 21:07:14 -0700 (PDT) From: Rajat Gupta To: imv4bel@gmail.com Cc: aaron1esau@gmail.com, ben@decadent.org.uk, davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, herbert@gondor.apana.org.au, horms@kernel.org, jiayuan.chen@linux.dev, kerneljasonxing@gmail.com, kuba@kernel.org, kuniyu@google.com, malin89@huawei.com, mhal@rbox.co, netdev@vger.kernel.org, pabeni@redhat.com, sd@queasysnail.net, stable@vger.kernel.org, steffen.klassert@secunet.com, sultan@kerneltoast.com, tanjingguo@huawei.com, Rajat Gupta Subject: Re: [PATCH net v5] net: skbuff: propagate shared-frag marker through frag-transfer helpers Date: Mon, 18 May 2026 21:02:32 -0700 Message-ID: <20260519040232.1395-1-rajat.gupta@oss.qualcomm.com> X-Mailer: git-send-email 2.51.2.windows.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: juGOgkRLQH96VKIekb21YTXtRVBRVoMG X-Proofpoint-ORIG-GUID: juGOgkRLQH96VKIekb21YTXtRVBRVoMG X-Authority-Analysis: v=2.4 cv=BICDalQG c=1 sm=1 tr=0 ts=6a0be1f4 cx=c_pps a=wEP8DlPgTf/vqF+yE6f9lg==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=qQm7GNJJ0ztNeIs_msoA:9 a=ZXulRonScM0A:10 a=bBxd6f-gb0O0v-kibOvt:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE5MDAzNyBTYWx0ZWRfX4dKJ2hYWyXJT 3hJlAJc3YjRzVeGyD9nqnqndVbaFGLinHtflFudCJDkn5D4fa7bkiTau4zIIm7/VANA5I+vm11s rlTDwX/7Wzwo6zJ3dF6TMB/wHsEyD+s084KYgq/bRHd48k0g0JxvkfyFF5E1b+Fu9+W3jhqnUME iaALJIXy9YLiqoOdUwdv4rPKZKBhUUYSoQtSaX6xjisS3eWDAxwPcWu3ebvFFf7WSJLzE27BMRf /rN4LDmGUkzUK+2lo44Qg7nmCj123JnaK8E3t3jRzlvmO9p8TM1cgeeDq9afILbA0A1lCXro2cK qwBvhQLHnOV2tlheAG/TzvVswNvOV44iT3KxtAuK9nDDmNMkZuYfZi+puRptY+29AjV6bsYC1Ir EIVaY5xueD3wizPOTwa81P5f8SrIuX1ql6NFANwdDnofLamfD1jKljQTHEJFtsytO/tFoO8i/HP cxu3vjgs7sCETQspSoQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-19_01,2026-05-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 spamscore=0 lowpriorityscore=0 malwarescore=0 suspectscore=0 priorityscore=1501 impostorscore=0 phishscore=0 clxscore=1011 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605190037 The skb_gro_receive() and skb_shift() fixes look correct -- we independently reported both to security@kernel.org with working LPE exploits confirming they are exploitable from unprivileged user namespaces. Could you add the following tags when respinning or applying? Reported-by: Rajat Gupta Tested-by: Rajat Gupta Thanks, Rajat