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Tue, 16 Jul 2019 01:28:06 -0700 (PDT) Date: Tue, 16 Jul 2019 01:28:06 -0700 In-Reply-To: <000000000000111cbe058dc7754d@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ed664f058dc82773@google.com> Subject: Re: memory leak in new_inode_pseudo (2) From: syzbot To: davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: be8454af Merge tag 'drm-next-2019-07-16' of git://anongit... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13d5f750600000 kernel config: https://syzkaller.appspot.com/x/.config?x=d23a1a7bf85c5250 dashboard link: https://syzkaller.appspot.com/bug?extid=e682cca30bc101a4d9d9 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=155c5800600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1738f800600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+e682cca30bc101a4d9d9@syzkaller.appspotmail.com executing program executing program executing program executing program BUG: memory leak unreferenced object 0xffff888128ea0980 (size 768): comm "syz-executor303", pid 7044, jiffies 4294943526 (age 13.490s) hex dump (first 32 bytes): 01 00 00 00 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 ................ backtrace: [<000000005ba542b8>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000005ba542b8>] slab_post_alloc_hook mm/slab.h:522 [inline] [<000000005ba542b8>] slab_alloc mm/slab.c:3319 [inline] [<000000005ba542b8>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483 [<000000006532a1e9>] sock_alloc_inode+0x1c/0xa0 net/socket.c:238 [<0000000014ddc967>] alloc_inode+0x2c/0xe0 fs/inode.c:227 [<0000000056541455>] new_inode_pseudo+0x18/0x70 fs/inode.c:916 [<000000003b5b5444>] sock_alloc+0x1c/0x90 net/socket.c:554 [<00000000e623b353>] __sock_create+0x8f/0x250 net/socket.c:1378 [<000000000e094708>] sock_create_kern+0x3b/0x50 net/socket.c:1483 [<000000009fe4f64f>] smc_create+0xae/0x160 net/smc/af_smc.c:1975 [<0000000056be84a7>] __sock_create+0x164/0x250 net/socket.c:1414 [<000000005915e5fe>] sock_create net/socket.c:1465 [inline] [<000000005915e5fe>] __sys_socket+0x69/0x110 net/socket.c:1507 [<00000000afa837b2>] __do_sys_socket net/socket.c:1516 [inline] [<00000000afa837b2>] __se_sys_socket net/socket.c:1514 [inline] [<00000000afa837b2>] __x64_sys_socket+0x1e/0x30 net/socket.c:1514 [<00000000d0addad1>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:296 [<000000004e8e7c22>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88811faeeab8 (size 56): comm "syz-executor303", pid 7044, jiffies 4294943526 (age 13.490s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 0a ea 28 81 88 ff ff d0 ea ae 1f 81 88 ff ff ...(............ backtrace: [<000000005ba542b8>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000005ba542b8>] slab_post_alloc_hook mm/slab.h:522 [inline] [<000000005ba542b8>] slab_alloc mm/slab.c:3319 [inline] [<000000005ba542b8>] kmem_cache_alloc+0x13f/0x2c0 mm/slab.c:3483 [<000000008ca63096>] kmem_cache_zalloc include/linux/slab.h:738 [inline] [<000000008ca63096>] lsm_inode_alloc security/security.c:522 [inline] [<000000008ca63096>] security_inode_alloc+0x33/0xb0 security/security.c:875 [<00000000b335d930>] inode_init_always+0x108/0x200 fs/inode.c:169 [<0000000015dcffb3>] alloc_inode+0x49/0xe0 fs/inode.c:234 [<0000000056541455>] new_inode_pseudo+0x18/0x70 fs/inode.c:916 [<000000003b5b5444>] sock_alloc+0x1c/0x90 net/socket.c:554 [<00000000e623b353>] __sock_create+0x8f/0x250 net/socket.c:1378 [<000000000e094708>] sock_create_kern+0x3b/0x50 net/socket.c:1483 [<000000009fe4f64f>] smc_create+0xae/0x160 net/smc/af_smc.c:1975 [<0000000056be84a7>] __sock_create+0x164/0x250 net/socket.c:1414 [<000000005915e5fe>] sock_create net/socket.c:1465 [inline] [<000000005915e5fe>] __sys_socket+0x69/0x110 net/socket.c:1507 [<00000000afa837b2>] __do_sys_socket net/socket.c:1516 [inline] [<00000000afa837b2>] __se_sys_socket net/socket.c:1514 [inline] [<00000000afa837b2>] __x64_sys_socket+0x1e/0x30 net/socket.c:1514 [<00000000d0addad1>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:296 [<000000004e8e7c22>] entry_SYSCALL_64_after_hwframe+0x44/0xa9