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Wed, 15 Nov 2023 20:34:39 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 55E0920040; Wed, 15 Nov 2023 20:34:39 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id EA6ED20043; Wed, 15 Nov 2023 20:34:37 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.179.9.51]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 15 Nov 2023 20:34:37 +0000 (GMT) From: Ilya Leoshkevich To: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka Cc: Christian Borntraeger , Dmitry Vyukov , Hyeonggon Yoo <42.hyeyoo@gmail.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Mark Rutland , Roman Gushchin , Sven Schnelle , Ilya Leoshkevich Subject: [PATCH 18/32] lib/zlib: Unpoison DFLTCC output buffers Date: Wed, 15 Nov 2023 21:30:50 +0100 Message-ID: <20231115203401.2495875-19-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231115203401.2495875-1-iii@linux.ibm.com> References: <20231115203401.2495875-1-iii@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: FcmPA45PTLlNdzoYRSKo5ivTe4t5LzGg X-Proofpoint-GUID: 9RBqKpW0ebiKf9o1-LJaYDwqoA8WDNjK Content-Transfer-Encoding: 8bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-15_20,2023-11-15_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 phishscore=0 suspectscore=0 bulkscore=0 priorityscore=1501 mlxlogscore=999 mlxscore=0 adultscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311150163 X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: B71F040024 X-Stat-Signature: nh3u7tgqxciemicjxm4169n1b7mq1m59 X-HE-Tag: 1700080490-551126 X-HE-Meta: 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 +hc4U7uG fInn9uaJW+GZP/GWkbvqlMm7k0JzXnLX93lLuGjdgthBPzJZFF5Eu/l459h3D0hCp74Vlf2BADwzBkzzorg2IFWUOuA0Wi6c2tSVvnboNmNFsnT+/9Y55s94lVJhWhrCLMYsUsJg/Ydw9NhtLvvq8slKqqwHsdjG7AhjpXnvpADD+/oMShJq8LsobZyvbgBDcIPmMrxhZKxY2nId5jW5puqHFrOe5TQbuL3DtZu4R/1Oww2yMXQkKIIfqWc0zVsEFrcY1BNQsWul1JKXya6H6yf2MkeFP/cWGwy4Y83JGmYGyzV2GyWlE6VH6J48InHIVO9e1LEzwiuPQM4A= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The constraints of the DFLTCC inline assembly are not precise: they do not communicate the size of the output buffers to the compiler, so it cannot automatically instrument it. Add the manual kmsan_unpoison_memory() calls for the output buffers. The logic is the same as in [1]. [1] https://github.com/zlib-ng/zlib-ng/commit/1f5ddcc009ac3511e99fc88736a9e1a6381168c5 Reported-by: Alexander Gordeev Signed-off-by: Ilya Leoshkevich --- lib/zlib_dfltcc/dfltcc.h | 1 + lib/zlib_dfltcc/dfltcc_util.h | 23 +++++++++++++++++++++++ 2 files changed, 24 insertions(+) diff --git a/lib/zlib_dfltcc/dfltcc.h b/lib/zlib_dfltcc/dfltcc.h index b96232bdd44d..0f2a16d7a48a 100644 --- a/lib/zlib_dfltcc/dfltcc.h +++ b/lib/zlib_dfltcc/dfltcc.h @@ -80,6 +80,7 @@ struct dfltcc_param_v0 { uint8_t csb[1152]; }; +static_assert(offsetof(struct dfltcc_param_v0, csb) == 384); static_assert(sizeof(struct dfltcc_param_v0) == 1536); #define CVT_CRC32 0 diff --git a/lib/zlib_dfltcc/dfltcc_util.h b/lib/zlib_dfltcc/dfltcc_util.h index 4a46b5009f0d..ce2e039a55b5 100644 --- a/lib/zlib_dfltcc/dfltcc_util.h +++ b/lib/zlib_dfltcc/dfltcc_util.h @@ -2,6 +2,7 @@ #ifndef DFLTCC_UTIL_H #define DFLTCC_UTIL_H +#include "dfltcc.h" #include /* @@ -20,6 +21,7 @@ typedef enum { #define DFLTCC_CMPR 2 #define DFLTCC_XPND 4 #define HBT_CIRCULAR (1 << 7) +#define DFLTCC_FN_MASK ((1 << 7) - 1) #define HB_BITS 15 #define HB_SIZE (1 << HB_BITS) @@ -34,6 +36,7 @@ static inline dfltcc_cc dfltcc( ) { Byte *t2 = op1 ? *op1 : NULL; + unsigned char *orig_t2 = t2; size_t t3 = len1 ? *len1 : 0; const Byte *t4 = op2 ? *op2 : NULL; size_t t5 = len2 ? *len2 : 0; @@ -59,6 +62,26 @@ static inline dfltcc_cc dfltcc( : "cc", "memory"); t2 = r2; t3 = r3; t4 = r4; t5 = r5; + switch (fn & DFLTCC_FN_MASK) { + case DFLTCC_QAF: + kmsan_unpoison_memory(param, sizeof(struct dfltcc_qaf_param)); + break; + case DFLTCC_GDHT: + kmsan_unpoison_memory(param, offsetof(struct dfltcc_param_v0, csb)); + break; + case DFLTCC_CMPR: + kmsan_unpoison_memory(param, sizeof(struct dfltcc_param_v0)); + kmsan_unpoison_memory( + orig_t2, + t2 - orig_t2 + + (((struct dfltcc_param_v0 *)param)->sbb == 0 ? 0 : 1)); + break; + case DFLTCC_XPND: + kmsan_unpoison_memory(param, sizeof(struct dfltcc_param_v0)); + kmsan_unpoison_memory(orig_t2, t2 - orig_t2); + break; + } + if (op1) *op1 = t2; if (len1) -- 2.41.0