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List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4b91:b0:65b:380a:ce87 with SMTP id 006d021491bc7-65b4527c6d5mr2945597eaf.63.1765652499433; Sat, 13 Dec 2025 11:01:39 -0800 (PST) Date: Sat, 13 Dec 2025 11:01:39 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <693db813.a70a0220.104cf0.0316.GAE@google.com> Subject: [syzbot] [fs?] memory leak in adfs_init_fs_context From: syzbot To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: cb015814f8b6 Merge tag 'f2fs-for-6.19-rc1' of git://git.ke.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14d85a1a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=69400c231dedfdcf dashboard link: https://syzkaller.appspot.com/bug?extid=1c70732df5fd4f0e4fbb compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17de9eb4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15b6d992580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/59ea583a27f0/disk-cb015814.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/5251b8b465ee/vmlinux-cb015814.xz kernel image: https://storage.googleapis.com/syzbot-assets/061ac7ae9ddf/bzImage-cb015814.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1c70732df5fd4f0e4fbb@syzkaller.appspotmail.com BUG: memory leak unreferenced object 0xffff888126345900 (size 64): comm "syz.0.18", pid 6076, jiffies 4294944529 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 c0 01 3f 00 00 00 00 00 ..........?..... backtrace (crc 45941a6b): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5258 [inline] __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5766 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] adfs_init_fs_context+0x26/0xe0 fs/adfs/super.c:440 alloc_fs_context+0x2a0/0x6e0 fs/fs_context.c:315 do_new_mount fs/namespace.c:3692 [inline] path_mount+0x93f/0x1320 fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount fs/namespace.c:4201 [inline] __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff888126345f40 (size 64): comm "syz.0.19", pid 6079, jiffies 4294944531 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 c0 01 3f 00 00 00 00 00 ..........?..... backtrace (crc 45941a6b): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5258 [inline] __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5766 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] adfs_init_fs_context+0x26/0xe0 fs/adfs/super.c:440 alloc_fs_context+0x2a0/0x6e0 fs/fs_context.c:315 do_new_mount fs/namespace.c:3692 [inline] path_mount+0x93f/0x1320 fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount fs/namespace.c:4201 [inline] __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff88812636ad40 (size 64): comm "syz.0.20", pid 6128, jiffies 4294945167 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 c0 01 3f 00 00 00 00 00 ..........?..... backtrace (crc 45941a6b): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5258 [inline] __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5766 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] adfs_init_fs_context+0x26/0xe0 fs/adfs/super.c:440 alloc_fs_context+0x2a0/0x6e0 fs/fs_context.c:315 do_new_mount fs/namespace.c:3692 [inline] path_mount+0x93f/0x1320 fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount fs/namespace.c:4201 [inline] __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff888126345b40 (size 64): comm "syz.0.21", pid 6129, jiffies 4294945168 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 c0 01 3f 00 00 00 00 00 ..........?..... backtrace (crc 45941a6b): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4953 [inline] slab_alloc_node mm/slub.c:5258 [inline] __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5766 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] adfs_init_fs_context+0x26/0xe0 fs/adfs/super.c:440 alloc_fs_context+0x2a0/0x6e0 fs/fs_context.c:315 do_new_mount fs/namespace.c:3692 [inline] path_mount+0x93f/0x1320 fs/namespace.c:4022 do_mount fs/namespace.c:4035 [inline] __do_sys_mount fs/namespace.c:4224 [inline] __se_sys_mount fs/namespace.c:4201 [inline] __x64_sys_mount+0x1a2/0x1e0 fs/namespace.c:4201 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xa4/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF --- 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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