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Tue, 20 Dec 2022 20:46:41 -0800 (PST) Date: Tue, 20 Dec 2022 20:46:41 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001b2b2e05f04f3ddb@google.com> Subject: [syzbot] memory leak in prctl From: syzbot To: akpm@linux-foundation.org, brauner@kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 9ADCE40007 X-Rspam-User: X-Stat-Signature: ubhu8914xom38bw8yyqo4eeu6owiyndt X-HE-Tag: 1671598002-840378 X-HE-Meta: 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 5x0FSHzp 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 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: Hello, syzbot found the following issue on: HEAD commit: 77856d911a8c Merge tag 'arm64-fixes' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17f28cbb880000 kernel config: https://syzkaller.appspot.com/x/.config?x=6b1ea4fdbd78230a dashboard link: https://syzkaller.appspot.com/bug?extid=91edf9178386a07d06a7 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=153ff26f880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1073a993880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/93698bc86a1d/disk-77856d91.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6190640893ad/vmlinux-77856d91.xz kernel image: https://storage.googleapis.com/syzbot-assets/ddf790b00ced/bzImage-77856d91.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+91edf9178386a07d06a7@syzkaller.appspotmail.com Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. executing program BUG: memory leak unreferenced object 0xffff88810c4c57a0 (size 32): comm "syz-executor948", pid 5064, jiffies 4294946184 (age 7.250s) hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [] __do_kmalloc_node mm/slab_common.c:967 [inline] [] __kmalloc+0x46/0x120 mm/slab_common.c:981 [] kmalloc include/linux/slab.h:584 [inline] [] anon_vma_name_alloc+0x27/0x60 mm/madvise.c:78 [] prctl_set_vma kernel/sys.c:2324 [inline] [] __do_sys_prctl+0xaff/0xba0 kernel/sys.c:2627 [] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [] entry_SYSCALL_64_after_hwframe+0x63/0xcd --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches