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Wed, 02 Oct 2019 17:19:08 -0700 (PDT) Date: Wed, 02 Oct 2019 17:19:08 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000afc1b40593f68888@google.com> Subject: memory leak in gfs2_init_fs_context From: syzbot To: agruenba@redhat.com, cluster-devel@redhat.com, linux-kernel@vger.kernel.org, rpeterso@redhat.com, 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 Hello, syzbot found the following crash on: HEAD commit: f1f2f614 Merge branch 'next-integrity' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15569c05600000 kernel config: https://syzkaller.appspot.com/x/.config?x=4e93436f92b0cfde dashboard link: https://syzkaller.appspot.com/bug?extid=c2fdfd2b783754878fb6 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10327c05600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=105c9fd5600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+c2fdfd2b783754878fb6@syzkaller.appspotmail.com udit: type=1400 audit(1569701659.045:64): avc: denied { map } for pid=6842 comm="syz-executor375" path="/root/syz-executor375626622" dev="sda1" ino=16502 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program BUG: memory leak unreferenced object 0xffff88810fd9a500 (size 256): comm "syz-executor375", pid 6845, jiffies 4294941255 (age 13.550s) hex dump (first 32 bytes): 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 00 ................ backtrace: [<00000000462ab467>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<00000000462ab467>] slab_post_alloc_hook mm/slab.h:586 [inline] [<00000000462ab467>] slab_alloc mm/slab.c:3319 [inline] [<00000000462ab467>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548 [<00000000b1a62211>] kmalloc include/linux/slab.h:552 [inline] [<00000000b1a62211>] kzalloc include/linux/slab.h:686 [inline] [<00000000b1a62211>] gfs2_init_fs_context+0x25/0x90 fs/gfs2/ops_fstype.c:1543 [<00000000db94ecb4>] gfs2_meta_init_fs_context+0x17/0x40 fs/gfs2/ops_fstype.c:1608 [<0000000077df5577>] alloc_fs_context+0x174/0x200 fs/fs_context.c:293 [<000000008d5e3681>] fs_context_for_mount+0x25/0x30 fs/fs_context.c:307 [<0000000030bafbdb>] __do_sys_fsopen fs/fsopen.c:137 [inline] [<0000000030bafbdb>] __se_sys_fsopen fs/fsopen.c:115 [inline] [<0000000030bafbdb>] __x64_sys_fsopen+0xa9/0x1a0 fs/fsopen.c:115 [<00000000974fed69>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290 [<00000000299e0e1b>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88810fd9a200 (size 256): comm "syz-executor375", pid 6846, jiffies 4294941838 (age 7.720s) hex dump (first 32 bytes): 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 00 ................ backtrace: [<00000000462ab467>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<00000000462ab467>] slab_post_alloc_hook mm/slab.h:586 [inline] [<00000000462ab467>] slab_alloc mm/slab.c:3319 [inline] [<00000000462ab467>] kmem_cache_alloc_trace+0x145/0x2c0 mm/slab.c:3548 [<00000000b1a62211>] kmalloc include/linux/slab.h:552 [inline] [<00000000b1a62211>] kzalloc include/linux/slab.h:686 [inline] [<00000000b1a62211>] gfs2_init_fs_context+0x25/0x90 fs/gfs2/ops_fstype.c:1543 [<00000000db94ecb4>] gfs2_meta_init_fs_context+0x17/0x40 fs/gfs2/ops_fstype.c:1608 [<0000000077df5577>] alloc_fs_context+0x174/0x200 fs/fs_context.c:293 [<000000008d5e3681>] fs_context_for_mount+0x25/0x30 fs/fs_context.c:307 [<0000000030bafbdb>] __do_sys_fsopen fs/fsopen.c:137 [inline] [<0000000030bafbdb>] __se_sys_fsopen fs/fsopen.c:115 [inline] [<0000000030bafbdb>] __x64_sys_fsopen+0xa9/0x1a0 fs/fsopen.c:115 [<00000000974fed69>] do_syscall_64+0x73/0x1f0 arch/x86/entry/common.c:290 [<00000000299e0e1b>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches