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Mon, 23 Sep 2024 02:04:23 -0700 (PDT) Date: Mon, 23 Sep 2024 02:04:23 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <66f12f17.050a0220.3eed3.000b.GAE@google.com> Subject: [syzbot] [mm?] KCSAN: data-race in mas_wr_store_entry / mtree_range_walk From: syzbot To: Liam.Howlett@oracle.com, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 82227180008 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: 4t4k5ap96krqsjtyj3cjkiyr6n86xffj X-HE-Tag: 1727082264-387921 X-HE-Meta: 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 XtAS6Y1y 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 1PIWiNtu TnMBHrZbcum1TY/li6EpW+Vc689kBxxMbUATRpx560i2JpmdP6vi5LKkmqEY8A30/TTysHUOXwfvy2kV9HY8EPm/xO2K59HRLr5BaLC23VmkklC/O7G6JeKQ0xe63ODYYMnH9t0ejiR3h/DjaQ2D9Ddkb0BaRZkxoA0BLVGpvHz0JjfT83RImyw98LBrsGv/XiyVTpeCDYCpXnWrxuV7y3+++RrsmdbCo4ZPXqECIprqzZ3rpcsGh2kcveQDM3A07RiM0xbUDVkVvb1wY5FbrfVcY1hGcynRhsb7c3URIE4j3OKGDYWq3J3g4yCLkYT5cieEZqEZQKhb4KD580kVdEwmTfAjPPSYBAvnJQPvJahf2yK3YDNvEFB3c/Ht9XTcn4pZfkhIo0PtQRaW/NAZuNxgKL4b0iTg 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: Hello, syzbot found the following issue on: HEAD commit: 88264981f208 Merge tag 'sched_ext-for-6.12' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1237ec27980000 kernel config: https://syzkaller.appspot.com/x/.config?x=e6702f5f2b8ed242 dashboard link: https://syzkaller.appspot.com/bug?extid=e01fa33e67abb0b3b3bb compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/95bba355b2ed/disk-88264981.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/75966f4e5286/vmlinux-88264981.xz kernel image: https://storage.googleapis.com/syzbot-assets/7f1578876250/bzImage-88264981.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e01fa33e67abb0b3b3bb@syzkaller.appspotmail.com ================================================================== BUG: KCSAN: data-race in mas_wr_store_entry / mtree_range_walk write to 0xffff888114555710 of 8 bytes by task 9573 on cpu 1: mas_wr_slot_store lib/maple_tree.c:3889 [inline] mas_wr_store_entry+0x146b/0x2d00 lib/maple_tree.c:4075 mas_store_prealloc+0x6bf/0x960 lib/maple_tree.c:5520 vma_iter_store mm/vma.h:470 [inline] commit_merge+0x441/0x740 mm/vma.c:609 vma_expand+0x211/0x360 mm/vma.c:1024 vma_merge_new_range+0x2cf/0x3e0 mm/vma.c:963 mmap_region+0x887/0x16e0 mm/mmap.c:1416 do_mmap+0x718/0xb60 mm/mmap.c:496 vm_mmap_pgoff+0x133/0x290 mm/util.c:588 ksys_mmap_pgoff+0xd0/0x330 mm/mmap.c:542 x64_sys_call+0x1884/0x2d60 arch/x86/include/generated/asm/syscalls_64.h:10 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff888114555710 of 8 bytes by task 9574 on cpu 0: mtree_range_walk+0x1b4/0x460 lib/maple_tree.c:2779 mas_state_walk lib/maple_tree.c:3601 [inline] mas_walk+0x16e/0x320 lib/maple_tree.c:4948 lock_vma_under_rcu+0x95/0x260 mm/memory.c:6224 do_user_addr_fault arch/x86/mm/fault.c:1329 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x150/0x650 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 value changed: 0x00007f8311576fff -> 0xffffffff8529a680 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 9574 Comm: syz.0.2084 Tainted: G W 6.11.0-syzkaller-08481-g88264981f208 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup