On Sun, Nov 12, 2023 at 6:18 AM syzbot <syzbot+26eedf3631650972f17c@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 13d88ac54ddd Merge tag 'vfs-6.7.fsid' of git://git.kernel... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=121cf047680000 > kernel config: https://syzkaller.appspot.com/x/.config?x=ecfdf78a410c834 > dashboard link: https://syzkaller.appspot.com/bug?extid=26eedf3631650972f17c > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15c7a6eb680000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13f8b787680000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/9bb27a01f17c/disk-13d88ac5.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/fb496feed171/vmlinux-13d88ac5.xz > kernel image: https://storage.googleapis.com/syzbot-assets/f4da22719ffa/bzImage-13d88ac5.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+26eedf3631650972f17c@xxxxxxxxxxxxxxxxxxxxxxxxx > > executing program > BUG: memory leak > unreferenced object 0xffff8881009b40a8 (size 8): > comm "syz-executor225", pid 5035, jiffies 4294944336 (age 13.730s) > hex dump (first 8 bytes): > 2e 00 00 00 00 00 00 00 ........ > backtrace: > [<ffffffff8163331d>] kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] > [<ffffffff8163331d>] slab_post_alloc_hook mm/slab.h:766 [inline] > [<ffffffff8163331d>] slab_alloc_node mm/slub.c:3478 [inline] > [<ffffffff8163331d>] __kmem_cache_alloc_node+0x2dd/0x3f0 mm/slub.c:3517 > [<ffffffff8157e57c>] __do_kmalloc_node mm/slab_common.c:1006 [inline] > [<ffffffff8157e57c>] __kmalloc_node_track_caller+0x4c/0x150 mm/slab_common.c:1027 > [<ffffffff8156da4c>] kstrdup+0x3c/0x70 mm/util.c:62 > [<ffffffff81d0438a>] ovl_parse_param_lowerdir fs/overlayfs/params.c:496 [inline] > [<ffffffff81d0438a>] ovl_parse_param+0x70a/0xc70 fs/overlayfs/params.c:576 > [<ffffffff8170542b>] vfs_parse_fs_param+0xfb/0x190 fs/fs_context.c:146 > [<ffffffff81705556>] vfs_parse_fs_string+0x96/0xd0 fs/fs_context.c:188 > [<ffffffff8170566f>] vfs_parse_monolithic_sep+0xdf/0x130 fs/fs_context.c:230 > [<ffffffff816dff08>] do_new_mount fs/namespace.c:3333 [inline] > [<ffffffff816dff08>] path_mount+0xc48/0x10d0 fs/namespace.c:3664 > [<ffffffff816e0b41>] do_mount fs/namespace.c:3677 [inline] > [<ffffffff816e0b41>] __do_sys_mount fs/namespace.c:3886 [inline] > [<ffffffff816e0b41>] __se_sys_mount fs/namespace.c:3863 [inline] > [<ffffffff816e0b41>] __x64_sys_mount+0x1a1/0x1f0 fs/namespace.c:3863 > [<ffffffff84b67d8f>] do_syscall_x64 arch/x86/entry/common.c:51 [inline] > [<ffffffff84b67d8f>] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 > [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0x6b > > BUG: memory leak > unreferenced object 0xffff88814002d070 (size 8): > comm "syz-executor225", pid 5036, jiffies 4294944900 (age 8.090s) > hex dump (first 8 bytes): > 2e 00 00 00 00 00 00 00 ........ > backtrace: > [<ffffffff8163331d>] kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] > [<ffffffff8163331d>] slab_post_alloc_hook mm/slab.h:766 [inline] > [<ffffffff8163331d>] slab_alloc_node mm/slub.c:3478 [inline] > [<ffffffff8163331d>] __kmem_cache_alloc_node+0x2dd/0x3f0 mm/slub.c:3517 > [<ffffffff8157e57c>] __do_kmalloc_node mm/slab_common.c:1006 [inline] > [<ffffffff8157e57c>] __kmalloc_node_track_caller+0x4c/0x150 mm/slab_common.c:1027 > [<ffffffff8156da4c>] kstrdup+0x3c/0x70 mm/util.c:62 > [<ffffffff81d0438a>] ovl_parse_param_lowerdir fs/overlayfs/params.c:496 [inline] > [<ffffffff81d0438a>] ovl_parse_param+0x70a/0xc70 fs/overlayfs/params.c:576 > [<ffffffff8170542b>] vfs_parse_fs_param+0xfb/0x190 fs/fs_context.c:146 > [<ffffffff81705556>] vfs_parse_fs_string+0x96/0xd0 fs/fs_context.c:188 > [<ffffffff8170566f>] vfs_parse_monolithic_sep+0xdf/0x130 fs/fs_context.c:230 > [<ffffffff816dff08>] do_new_mount fs/namespace.c:3333 [inline] > [<ffffffff816dff08>] path_mount+0xc48/0x10d0 fs/namespace.c:3664 > [<ffffffff816e0b41>] do_mount fs/namespace.c:3677 [inline] > [<ffffffff816e0b41>] __do_sys_mount fs/namespace.c:3886 [inline] > [<ffffffff816e0b41>] __se_sys_mount fs/namespace.c:3863 [inline] > [<ffffffff816e0b41>] __x64_sys_mount+0x1a1/0x1f0 fs/namespace.c:3863 > [<ffffffff84b67d8f>] do_syscall_x64 arch/x86/entry/common.c:51 [inline] > [<ffffffff84b67d8f>] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82 > [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0x6b > > #syz test: https://github.com/amir73il/linux ovl-fixes
