From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f197.google.com (mail-oi1-f197.google.com [209.85.167.197]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D2D1D3655EA for ; Thu, 3 Sep 2026 08:34:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788424448; cv=none; b=UfxpovxQkleT8/nto7jYg05/sSxLPSEPNucohOSkZYb7aE+n3fcC5vqlyCWqXFyAzDOq1UyeuRuKfnyWzFMt3uGh1r1FoVvY+ett7mHW8s4KsLwN1F+dKHip7uR8LmXcPtBwI07nI9fEY7czM4hISq6CKZ18GzIZqYCsZKpc4UI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788424448; c=relaxed/simple; bh=IlLxJb6GL7PfjaveLvsDRODuBDC9KnK9zOO6l8x+rAg=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; 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2002:a05:6820:1789:b0:6aa:e367:a3e2 with SMTP id 006d021491bc7-6b585dada5dmr2529237eaf.19.1788424445319; Thu, 03 Sep 2026 01:34:05 -0700 (PDT) Date: Thu, 03 Sep 2026 01:34:05 -0700 In-Reply-To: <20260903061045.525053-1-eadavis@sina.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a9930fd.9266084e.bf0d7.016a.GAE@google.com> Subject: Re: [syzbot] [autofs?] memory leak in autofs_new_ino From: syzbot To: eadavis@sina.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 prepare_creds BUG: memory leak unreferenced object 0xffff888109c2f180 (size 184): comm "syz-executor", pid 6487, jiffies 4294948020 hex dump (first 32 bytes): 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 00 00 00 00 ................ backtrace (crc 1a243f47): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4597 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931 prepare_creds+0x22/0x570 kernel/cred.c:185 copy_creds+0x44/0x290 kernel/cred.c:286 copy_process+0x988/0x2d70 kernel/fork.c:2153 kernel_clone+0x101/0x710 kernel/fork.c:2748 __do_sys_clone+0x7f/0xb0 kernel/fork.c:2889 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff8881019c8600 (size 176): comm "syz.0.18", pid 6603, jiffies 4294948020 hex dump (first 32 bytes): 00 00 00 00 02 00 2c 0c 60 a4 87 85 ff ff ff ff ......,.`....... d0 b9 e9 0c 81 88 ff ff 00 e3 06 01 81 88 ff ff ................ backtrace (crc d2f375e0): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4597 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931 alloc_empty_file+0x57/0x180 fs/file_table.c:262 alloc_file fs/file_table.c:396 [inline] alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427 create_pipe_files+0x106/0x2f0 fs/pipe.c:1042 __do_pipe_flags fs/pipe.c:1088 [inline] do_pipe2+0x6c/0x160 fs/pipe.c:1136 __do_sys_pipe fs/pipe.c:1159 [inline] __se_sys_pipe fs/pipe.c:1157 [inline] __x64_sys_pipe+0x18/0x20 fs/pipe.c:1157 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff88810d168f18 (size 56): comm "syz.0.18", pid 6603, jiffies 4294948020 hex dump (first 32 bytes): ff ff 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 00 00 ................ backtrace (crc 2672a0c6): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4597 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931 lsm_file_alloc security/security.c:171 [inline] security_file_alloc+0x30/0x250 security/security.c:2406 init_file+0x3e/0x160 fs/file_table.c:184 alloc_empty_file+0x75/0x180 fs/file_table.c:266 alloc_file fs/file_table.c:396 [inline] alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427 create_pipe_files+0x106/0x2f0 fs/pipe.c:1042 __do_pipe_flags fs/pipe.c:1088 [inline] do_pipe2+0x6c/0x160 fs/pipe.c:1136 __do_sys_pipe fs/pipe.c:1159 [inline] __se_sys_pipe fs/pipe.c:1157 [inline] __x64_sys_pipe+0x18/0x20 fs/pipe.c:1157 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff888102dc7300 (size 184): comm "syz-executor", pid 6487, jiffies 4294948082 hex dump (first 32 bytes): 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 00 00 00 00 ................ backtrace (crc 7611ee4d): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4597 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931 prepare_creds+0x22/0x570 kernel/cred.c:185 copy_creds+0x44/0x290 kernel/cred.c:286 copy_process+0x988/0x2d70 kernel/fork.c:2153 kernel_clone+0x101/0x710 kernel/fork.c:2748 __do_sys_clone+0x7f/0xb0 kernel/fork.c:2889 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff8881027737e0 (size 32): comm "syz-executor", pid 6487, jiffies 4294948082 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ f8 52 0a 00 81 88 ff ff 00 00 00 00 00 00 00 00 .R.............. backtrace (crc 9ae86290): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4597 [inline] slab_alloc_node mm/slub.c:4917 [inline] __do_kmalloc_node mm/slub.c:5333 [inline] __kmalloc_noprof+0x3bf/0x550 mm/slub.c:5359 _kmalloc_noprof include/linux/slab.h:992 [inline] _kzalloc_noprof include/linux/slab.h:1309 [inline] lsm_blob_alloc+0x4d/0x80 security/security.c:218 lsm_cred_alloc security/security.c:235 [inline] security_prepare_creds+0x2d/0x290 security/security.c:2866 prepare_creds+0x317/0x570 kernel/cred.c:215 copy_creds+0x44/0x290 kernel/cred.c:286 copy_process+0x988/0x2d70 kernel/fork.c:2153 kernel_clone+0x101/0x710 kernel/fork.c:2748 __do_sys_clone+0x7f/0xb0 kernel/fork.c:2889 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf8/0x610 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff88810d41acc0 (size 176): comm "syz.0.19", pid 6624, jiffies 4294948082 hex dump (first 32 bytes): 00 00 00 00 02 00 2c 0c 60 a4 87 85 ff ff ff ff ......,.`....... 28 f3 f5 0c 81 88 ff ff c0 26 2b 16 81 88 ff ff (........&+..... backtrace (crc fec2fe67): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4597 [inline] slab_alloc_node mm/slub.c:4917 [inline] kmem_cache_alloc_noprof+0x34f/0x440 mm/slub.c:4931 alloc_empty_file+0x57/0x180 fs/file_table.c:262 alloc_file fs/file_table.c:396 [inline] alloc_file_pseudo+0xd3/0x180 fs/file_table.c:427 create_pipe_files+0x106/0x2f0 fs/pipe.c:1042 __do_pipe_flags fs/pipe.c:1088 [inline] do_pipe2+0x6c/0x160 fs/pipe.c:1136 __do_sys_pipe fs/pipe.c:1159 [inline] __se_sys_pipe fs/pipe.c:1157 [inline] __x64_sys_pipe+0x18/0x20 fs/pipe.c:1157 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf8/0x610 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: 8d3ae592 Linux 7.2 git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=17fb1f79580000 kernel config: https://syzkaller.appspot.com/x/.config?x=11ad91fcc8fa7933 dashboard link: https://syzkaller.appspot.com/bug?extid=df1db6e034b3953e19f5 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 patch: https://syzkaller.appspot.com/x/patch.diff?x=17a870f9580000