From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f71.google.com (mail-oo1-f71.google.com [209.85.161.71]) (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 ABF952DC334 for ; Mon, 2 Mar 2026 03:57:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.71 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772423824; cv=none; b=k5mZEmpoVGFw8VDu52sxjhQmXU1Y9fmvbNIJKAXFcAEnoCquSM4qV7BrQMg7FKfVrwuACz3cj0CmynZ7ETiAJDjtZSb15FnD44hO7FmV/+fjfKebfLVmiOEyNvpf+LE2LgSh/9oHp3at5rIDfXzQz4Fv7bOWpueAQTopoWk5bJg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772423824; c=relaxed/simple; bh=MrAdbzvaNDVVmq5AuxaSVfQlcESLYbLh6FuxlAd7o7E=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=sGFlg49HdSmFOY0j9QXk9RBTRMY505Vi/Wv4NJoJr1qXnW4Uqxdn9950COCWFsTW1pse6BLoIfqfcXNtYMU46ScjBxvWQMC1OAyLfwZTHnbeQs4dALqW9ptLG2UStc6y7KEP67rNFGNDwqDkUSISXuNHHoiQWx20C7RdnB5+vdw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.161.71 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oo1-f71.google.com with SMTP id 006d021491bc7-66b47c7a795so50686712eaf.2 for ; Sun, 01 Mar 2026 19:57:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1772423822; x=1773028622; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=JmWvfmtgAcDRz4bFImh8rJEfEmq6Cak2/bFtX09VN9Q=; b=jpIaq4dyWhz7JeRVthEHWZJGLGEM5bgXVn4iBrjWqUW7HSwCtXufqIB1pcdFeAoA0r VIn4JCQ4+70SjSal3YtR/XYduQcB8qHFp8paajVo4ybQT4E3tIDl8X0OXInTM6PitRpT ZrSQtWLm/X+hEW5YOQ6iZpTPCH28J9EiirLcilw0n22urX68VxWNolzKORYVGaCxlsdO Igj6XA/q2nD4XVexqB3pCPI2xhUtUVvOwSPTv2DcIpoYqq+BEQJiI29wHz8ZfOgsKqQA qkA4CpVbV5Y7eyGn09jQVwbNzLARty/rn9+4pSYltd+zA1q02W6X0jePV2t+ANgv0toN 8t9Q== X-Forwarded-Encrypted: i=1; AJvYcCXWwSwC4cBwCSaYuTvKltL0TV81C/TU6+4VJInnRboqWmPVESh3SKrSL8KiP+KlikMR0QzFX2oQPx4EfD/k@vger.kernel.org X-Gm-Message-State: AOJu0YznjnKgwhBIV4YGjfUjFzVNmtI+51rlBa1YyhPBs/E5w93i5NRs l8PD1HkLeT66738X9E2n2wjMXdrDF0Tzm0jOOW8mtABCDsZh2QM80Ycz0z46vCDA9hgDZDiSdhI 9rzbN5ms+ZLD3RIpg1IAWBi+BvZezesymHCxdWvTeCFOevd4PtkEYSNWOZuA= Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:418e:b0:67a:61f:646b with SMTP id 006d021491bc7-67a061f67bfmr3305124eaf.74.1772423821722; Sun, 01 Mar 2026 19:57:01 -0800 (PST) Date: Sun, 01 Mar 2026 19:57:01 -0800 In-Reply-To: <20260302034102.3145719-1-wangqing7171@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69a50a8d.050a0220.3a55be.006f.GAE@google.com> Subject: Re: [syzbot] [mm?] [f2fs?] [exfat?] memory leak in __kfree_rcu_sheaf From: syzbot To: akpm@linux-foundation.org, chao@kernel.org, jaegeuk@kernel.org, jannh@google.com, liam.howlett@oracle.com, linkinjeon@kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, pfalcato@suse.de, sj1557.seo@samsung.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, wangqing7171@gmail.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 __pcs_replace_empty_main BUG: memory leak unreferenced object 0xffff88810005fa00 (size 512): comm "swapper/0", pid 0, jiffies 4294937296 hex dump (first 32 bytes): 00 2e c5 05 81 88 ff ff 00 a2 96 0a 81 88 ff ff ................ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc ee49fed0): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4844 [inline] __do_kmalloc_node mm/slub.c:5237 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2771 alloc_empty_sheaf mm/slub.c:2786 [inline] alloc_full_sheaf mm/slub.c:2834 [inline] __pcs_replace_empty_main+0x1e4/0x260 mm/slub.c:4602 alloc_from_pcs mm/slub.c:4695 [inline] slab_alloc_node mm/slub.c:4829 [inline] __kmalloc_cache_noprof+0x3ac/0x480 mm/slub.c:5353 kmalloc_noprof include/linux/slab.h:950 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __irq_domain_alloc_fwnode+0x37/0x140 kernel/irq/irqdomain.c:95 irq_domain_alloc_named_fwnode include/linux/irqdomain.h:271 [inline] arch_early_irq_init+0x1c/0x70 arch/x86/kernel/apic/vector.c:803 start_kernel+0x931/0xb80 init/main.c:1114 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310 x86_64_start_kernel+0xce/0xd0 arch/x86/kernel/head64.c:291 common_startup_64+0x13e/0x148 BUG: memory leak unreferenced object 0xffff8881008f8c00 (size 512): comm "kthreadd", pid 2, jiffies 4294937339 hex dump (first 32 bytes): 00 d6 04 00 81 88 ff ff 00 92 96 0a 81 88 ff ff ................ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc f2ef5290): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4844 [inline] __do_kmalloc_node mm/slub.c:5237 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2771 alloc_empty_sheaf mm/slub.c:2786 [inline] alloc_full_sheaf mm/slub.c:2834 [inline] __pcs_replace_empty_main+0x1e4/0x260 mm/slub.c:4602 alloc_from_pcs mm/slub.c:4695 [inline] slab_alloc_node mm/slub.c:4829 [inline] __kmalloc_cache_node_noprof+0x3ef/0x4e0 mm/slub.c:5366 kmalloc_node_noprof include/linux/slab.h:1077 [inline] __get_vm_area_node+0xc6/0x1d0 mm/vmalloc.c:3221 __vmalloc_node_range_noprof+0x1d3/0xe50 mm/vmalloc.c:4024 __vmalloc_node_noprof+0x71/0x90 mm/vmalloc.c:4124 alloc_thread_stack_node kernel/fork.c:355 [inline] dup_task_struct kernel/fork.c:924 [inline] copy_process+0x3e5/0x28c0 kernel/fork.c:2050 kernel_clone+0xac/0x6e0 kernel/fork.c:2654 kernel_thread+0x80/0xb0 kernel/fork.c:2715 create_kthread kernel/kthread.c:490 [inline] kthreadd+0x186/0x250 kernel/kthread.c:848 ret_from_fork+0x23c/0x4b0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 BUG: memory leak unreferenced object 0xffff888105c53200 (size 512): comm "kworker/1:0", pid 23, jiffies 4294937917 hex dump (first 32 bytes): 00 a2 96 0a 81 88 ff ff 00 d4 04 00 81 88 ff ff ................ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc d24dd055): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4844 [inline] __do_kmalloc_node mm/slub.c:5237 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2771 alloc_empty_sheaf mm/slub.c:2786 [inline] __pcs_replace_full_main+0xe9/0x2c0 mm/slub.c:5700 free_to_pcs mm/slub.c:5753 [inline] slab_free mm/slub.c:6154 [inline] kfree+0x352/0x390 mm/slub.c:6467 vfree.part.0+0x1d5/0x4d0 mm/vmalloc.c:3485 vfree mm/vmalloc.c:3456 [inline] delayed_vfree_work+0x5b/0x90 mm/vmalloc.c:3398 process_one_work+0x26c/0x5d0 kernel/workqueue.c:3275 process_scheduled_works kernel/workqueue.c:3358 [inline] worker_thread+0x243/0x490 kernel/workqueue.c:3439 kthread+0x14e/0x1a0 kernel/kthread.c:467 ret_from_fork+0x23c/0x4b0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 BUG: memory leak unreferenced object 0xffff888105c52e00 (size 512): comm "kworker/u8:5", pid 4440, jiffies 4294937918 hex dump (first 32 bytes): c8 2c 04 00 81 88 ff ff 00 fa 05 00 81 88 ff ff .,.............. 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc a68b63de): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4844 [inline] __do_kmalloc_node mm/slub.c:5237 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2771 alloc_empty_sheaf mm/slub.c:2786 [inline] __pcs_replace_full_main+0xe9/0x2c0 mm/slub.c:5700 free_to_pcs mm/slub.c:5753 [inline] slab_free mm/slub.c:6154 [inline] kfree+0x352/0x390 mm/slub.c:6467 call_usermodehelper_freeinfo kernel/umh.c:43 [inline] umh_complete kernel/umh.c:57 [inline] call_usermodehelper_exec_async+0x1c7/0x1f0 kernel/umh.c:119 ret_from_fork+0x23c/0x4b0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 BUG: memory leak unreferenced object 0xffff88810a96a200 (size 512): comm "udevadm", pid 5177, jiffies 4294938175 hex dump (first 32 bytes): 00 fa 05 00 81 88 ff ff 00 32 c5 05 81 88 ff ff .........2...... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 94107438): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4844 [inline] __do_kmalloc_node mm/slub.c:5237 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2771 alloc_empty_sheaf mm/slub.c:2786 [inline] alloc_full_sheaf mm/slub.c:2834 [inline] __pcs_replace_empty_main+0x1e4/0x260 mm/slub.c:4602 alloc_from_pcs mm/slub.c:4695 [inline] slab_alloc_node mm/slub.c:4829 [inline] __kmalloc_cache_noprof+0x3ac/0x480 mm/slub.c:5353 kmalloc_noprof include/linux/slab.h:950 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] kernfs_get_open_node fs/kernfs/file.c:543 [inline] kernfs_fop_open+0x4f3/0x580 fs/kernfs/file.c:718 do_dentry_open+0x202/0x8d0 fs/open.c:949 vfs_open+0x3d/0x1b0 fs/open.c:1081 do_open fs/namei.c:4671 [inline] path_openat+0x154d/0x1e20 fs/namei.c:4830 do_file_open+0x121/0x200 fs/namei.c:4859 do_sys_openat2+0xa5/0x140 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x82/0xf0 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f BUG: memory leak unreferenced object 0xffff888109d58400 (size 512): comm "udevd", pid 5176, jiffies 4294938222 hex dump (first 32 bytes): 00 12 47 2a 81 88 ff ff 00 ee 46 2a 81 88 ff ff ..G*......F*.... 00 12 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace (crc af8b5cec): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4520 [inline] slab_alloc_node mm/slub.c:4844 [inline] __do_kmalloc_node mm/slub.c:5237 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5250 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2771 alloc_empty_sheaf mm/slub.c:2786 [inline] __kfree_rcu_sheaf+0x164/0x240 mm/slub.c:5887 kfree_rcu_sheaf mm/slab_common.c:1608 [inline] kvfree_call_rcu+0x1f6/0x3c0 mm/slab_common.c:1957 kernfs_unlink_open_file+0x194/0x1b0 fs/kernfs/file.c:604 kernfs_fop_release+0x55/0x110 fs/kernfs/file.c:783 __fput+0x1b5/0x4f0 fs/file_table.c:469 fput_close_sync+0x67/0x120 fs/file_table.c:574 __do_sys_close fs/open.c:1509 [inline] __se_sys_close fs/open.c:1494 [inline] __x64_sys_close+0x4a/0xc0 fs/open.c:1494 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe2/0xf80 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: 11439c46 Linux 7.0-rc2 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1277a202580000 kernel config: https://syzkaller.appspot.com/x/.config?x=2c6ad6fefffa76b1 dashboard link: https://syzkaller.appspot.com/bug?extid=cae7809e9dc1459e4e63 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=13801006580000