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List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1623:b0:659:9a49:8ea8 with SMTP id 006d021491bc7-65b4523bfd8mr4453315eaf.44.1765746902901; Sun, 14 Dec 2025 13:15:02 -0800 (PST) Date: Sun, 14 Dec 2025 13:15:02 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <693f28d6.a70a0220.104cf0.032d.GAE@google.com> Subject: Re: [syzbot] [fs?] memory leak in adfs_init_fs_context From: syzbot To: eraykrdg1@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: memory leak in adfs_init_fs_context BUG: memory leak unreferenced object 0xffff888128792680 (size 64): comm "syz.0.17", pid 6733, jiffies 4294947442 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:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5771 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 0xffff888128792280 (size 64): comm "syz.0.18", pid 6736, jiffies 4294947443 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:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5771 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 0xffff88811cb63040 (size 64): comm "syz.0.19", pid 6739, jiffies 4294947445 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:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5771 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 0xffff888128792f80 (size 64): comm "syz.0.20", pid 6770, jiffies 4294948013 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:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5771 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 0xffff88811cb63f80 (size 64): comm "syz.0.21", pid 6772, jiffies 4294948014 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:4958 [inline] slab_alloc_node mm/slub.c:5263 [inline] __kmalloc_cache_noprof+0x3b2/0x570 mm/slub.c:5771 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 Tested on: commit: 8f0b4cce Linux 6.19-rc1 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1275511a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=d60836e327fd6756 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 Note: no patches were applied.