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Fri, 15 Nov 2024 17:17:18 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id C72zOh6CN2fBXQAAD6G6ig (envelope-from ); Fri, 15 Nov 2024 17:17:18 +0000 Message-ID: Date: Fri, 15 Nov 2024 18:17:18 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 6.6.y 0/5] fix error handling in mmap_region() and refactor (hotfixes) Content-Language: en-US To: Lorenzo Stoakes , stable@vger.kernel.org Cc: Andrew Morton , "Liam R . Howlett" , Jann Horn , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linus Torvalds , Peter Xu , Catalin Marinas , Will Deacon , Mark Brown , "David S . Miller" , Andreas Larsson , "James E . J . Bottomley" , Helge Deller References: From: Vlastimil Babka Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJkBREIBQkRadznAAoJECJPp+fMgqZkNxIQ ALZRqwdUGzqL2aeSavbum/VF/+td+nZfuH0xeWiO2w8mG0+nPd5j9ujYeHcUP1edE7uQrjOC Gs9sm8+W1xYnbClMJTsXiAV88D2btFUdU1mCXURAL9wWZ8Jsmz5ZH2V6AUszvNezsS/VIT87 AmTtj31TLDGwdxaZTSYLwAOOOtyqafOEq+gJB30RxTRE3h3G1zpO7OM9K6ysLdAlwAGYWgJJ V4JqGsQ/lyEtxxFpUCjb5Pztp7cQxhlkil0oBYHkudiG8j1U3DG8iC6rnB4yJaLphKx57NuQ PIY0Bccg+r9gIQ4XeSK2PQhdXdy3UWBr913ZQ9AI2usid3s5vabo4iBvpJNFLgUmxFnr73SJ KsRh/2OBsg1XXF/wRQGBO9vRuJUAbnaIVcmGOUogdBVS9Sun/Sy4GNA++KtFZK95U7J417/J Hub2xV6Ehc7UGW6fIvIQmzJ3zaTEfuriU1P8ayfddrAgZb25JnOW7L1zdYL8rXiezOyYZ8Fm ZyXjzWdO0RpxcUEp6GsJr11Bc4F3aae9OZtwtLL/jxc7y6pUugB00PodgnQ6CMcfR/HjXlae h2VS3zl9+tQWHu6s1R58t5BuMS2FNA58wU/IazImc/ZQA+slDBfhRDGYlExjg19UXWe/gMcl De3P1kxYPgZdGE2eZpRLIbt+rYnqQKy8UxlszsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZAUSmwUJDK5EZgAKCRAiT6fnzIKmZOJGEACOKABgo9wJXsbWhGWYO7mD 8R8mUyJHqbvaz+yTLnvRwfe/VwafFfDMx5GYVYzMY9TWpA8psFTKTUIIQmx2scYsRBUwm5VI EurRWKqENcDRjyo+ol59j0FViYysjQQeobXBDDE31t5SBg++veI6tXfpco/UiKEsDswL1WAr tEAZaruo7254TyH+gydURl2wJuzo/aZ7Y7PpqaODbYv727Dvm5eX64HCyyAH0s6sOCyGF5/p eIhrOn24oBf67KtdAN3H9JoFNUVTYJc1VJU3R1JtVdgwEdr+NEciEfYl0O19VpLE/PZxP4wX PWnhf5WjdoNI1Xec+RcJ5p/pSel0jnvBX8L2cmniYnmI883NhtGZsEWj++wyKiS4NranDFlA HdDM3b4lUth1pTtABKQ1YuTvehj7EfoWD3bv9kuGZGPrAeFNiHPdOT7DaXKeHpW9homgtBxj 8aX/UkSvEGJKUEbFL9cVa5tzyialGkSiZJNkWgeHe+jEcfRT6pJZOJidSCdzvJpbdJmm+eED w9XOLH1IIWh7RURU7G1iOfEfmImFeC3cbbS73LQEFGe1urxvIH5K/7vX+FkNcr9ujwWuPE9b 1C2o4i/yZPLXIVy387EjA6GZMqvQUFuSTs/GeBcv0NjIQi8867H3uLjz+mQy63fAitsDwLmR EP+ylKVEKb0Q2A== In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 734B4120002 X-Rspamd-Server: rspam01 X-Stat-Signature: 5gm4nh17h44ijjcefknh8mtypai4f7ze X-HE-Tag: 1731690980-549698 X-HE-Meta: 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 zlHcmE+E WDcHs5cNG/FPu3YCCOWAlDId6VoNKWfrcIYVWcJ/oPk8Y4K+3NXWB+KGfCW63i0QFHcTV+b9+N8YsJffHSt8oWRw6Aw5Me0tNkc+9W4y5sTYO84wr+c7GXT/VT9d4mcHIGNZtBzrNuTt1Rka+483ALM/n8uVpCUluL9X4MtI1hivF7XrvcDQP6cqmXUaoQ2nlHK1EcsIJn7HiYO60JMP52fSTt2TJAnjsFFiZpm3UVRlw8SnVEtPaPp92lx9K9ZF9ckVaKKfMETWSsRiwEkERVlgA8oyAvrDnA1maz3eu678EhEbNDakCCZTAIYrRdeIQMB5r4nz/f7Qn9GYD4FfrBn+Vtw== 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: On 11/15/24 13:41, Lorenzo Stoakes wrote: > Critical fixes for mmap_region(), backported to 6.6.y. > > Some notes on differences from upstream: > > * In this kernel is_shared_maywrite() does not exist and the code uses > VM_SHARED to determine whether mapping_map_writable() / > mapping_unmap_writable() should be invoked. This backport therefore > follows suit. > > * Each version of these series is confronted by a slightly different > mmap_region(), so we must adapt the change for each stable version. The > approach remains the same throughout, however, and we correctly avoid > closing the VMA part way through any __mmap_region() operation. > > Lorenzo Stoakes (5): > mm: avoid unsafe VMA hook invocation when error arises on mmap hook > mm: unconditionally close VMAs on error > mm: refactor map_deny_write_exec() > mm: refactor arch_calc_vm_flag_bits() and arm64 MTE handling > mm: resolve faulty mmap_region() error path behaviour I don't know if review tags are actually applied to stable backports on top of the original reviews, but I've checked so FTR: Reviewed-by: Vlastimil Babka > arch/arm64/include/asm/mman.h | 10 ++- > arch/parisc/include/asm/mman.h | 5 +- > include/linux/mman.h | 28 ++++++-- > mm/internal.h | 45 ++++++++++++ > mm/mmap.c | 128 ++++++++++++++++++--------------- > mm/mprotect.c | 2 +- > mm/nommu.c | 9 ++- > mm/shmem.c | 3 - > 8 files changed, 153 insertions(+), 77 deletions(-) > > -- > 2.47.0