From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f69.google.com (mail-ot1-f69.google.com [209.85.210.69]) (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 DA7FD27A907 for ; Sun, 3 May 2026 07:17:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777792624; cv=none; b=SO0yn2znJPdz6T8Dyfl/DFfI/w5jEyw4IixkxCbrEIipu3yABjni+WHdwwDDeYFiFT+6fQWIDXPd6Vfi5zxlcdHjeJtYHFvzTdgwTzY4fRZTVi3bKuKY+nvKP5uf91eIilrBM4twbJa/ZGXVVw+W8vM2JGDuCj/yxVLpUDf7f4g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777792624; c=relaxed/simple; bh=dqUieI8Kr9p6srJiGx0+pY67OmzHqv9NA9xPU7J5Tk0=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=KGVu86TfvXwI0T64kLLH0SutclUqUmuVWDwtoPpEWArFaNbEJTAhljhcyZXHBlgflDvdQ31BzTE9N4I+UeSL5D6YwZBEzB3euki43odVY4sCoQXs7cIm7x2cG0lXOzuUddgsDatuQd6NX/Lw3/KtfYVtSsfebqmHaU9oraTKBkc= 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=209.85.210.69 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-ot1-f69.google.com with SMTP id 46e09a7af769-7dbe76e3abcso9461333a34.0 for ; Sun, 03 May 2026 00:17:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777792622; x=1778397422; 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=wBJ+nqiJeCAh7ANanxHfUmzC7i4o2jYq4KYC2pamiXg=; b=MYlVhGGIctI+o/lbQ8mEXtAlN5sUN03u9jrRsUjRLxFV+fJAVAQf4HkpM3XMj0LWzX RgDwxGPujbBgBAkv326HTAdXka0mWqtL7LdpEOUizxdryuG+2mr5dNjRd4GMTLFcXzB1 VdIEzrlPGpN7tdDQyMBIOy8y3zMrFnft7pTksV6OX6lY1y03gMxB9xb0Dbtr4iq5A245 Byp6K5C0+EmWF02WkC6joZSwrSYFg0ItiJFfdnkpJExOFwF8CNYHo/GRayXDXZH3F+c3 P1y417ASPGE1OZtm5xpComVCoA1PFvU6quGIvv/mB+mGyC3k861Ib5o/WSDrZ+lsslg9 9vRQ== X-Forwarded-Encrypted: i=1; AFNElJ/EtQ9HjLQ/G9nM7tFeljU8kHR4PnsdWdlvgFhHiiehD9zTJSeTqtvP3yBbU4CKYZ/nieQ86S7gxzsgUnM=@vger.kernel.org X-Gm-Message-State: AOJu0YxoJjt6WaikI9AGqQpExDV9RqpEH8+w+yYO8qWcT6x6rSKFHj9t JV9aQLuJuXrypWQlJaqdkbkEvJTgFKM7eyct711Qxzgm5Rh5/SH2V/y8DLN2xWqcFtNWCSsC5jN nYxDjADrmAtlrrdWuk5Y/6pXzDEDAIN9VfsBbE8qeoky+mq/N1y6YTRavmlk= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:210e:b0:696:2674:8a18 with SMTP id 006d021491bc7-69697c50cbcmr2729750eaf.35.1777792621895; Sun, 03 May 2026 00:17:01 -0700 (PDT) Date: Sun, 03 May 2026 00:17:01 -0700 In-Reply-To: <4b30ba28-6f75-43a1-a108-5c0288ab021a@dev.snart.me> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69f6f66d.050a0220.312cd3.002c.GAE@google.com> Subject: Re: [syzbot] [mm?] [exfat?] [f2fs?] memory leak in __kfree_rcu_sheaf From: syzbot To: dxdt@dev.snart.me, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.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 __pcs_replace_empty_main BUG: memory leak unreferenced object 0xffff88810005f600 (size 512): comm "swapper/0", pid 0, jiffies 4294937296 hex dump (first 32 bytes): e0 e2 ee 2c 81 88 ff ff a0 13 ad 81 ff ff ff ff ...,............ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 2486057c): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2768 alloc_empty_sheaf mm/slub.c:2783 [inline] __pcs_replace_empty_main+0x22a/0x2a0 mm/slub.c:4646 alloc_from_pcs mm/slub.c:4749 [inline] slab_alloc_node mm/slub.c:4883 [inline] __kmalloc_cache_noprof+0x3a6/0x480 mm/slub.c:5410 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:1123 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 0xffff888101d04e00 (size 512): comm "kworker/u8:5", pid 311, jiffies 4294937428 hex dump (first 32 bytes): b8 1c b8 28 81 88 ff ff a0 13 ad 81 ff ff ff ff ...(............ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 1d48d83d): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2768 alloc_empty_sheaf mm/slub.c:2783 [inline] __pcs_replace_full_main+0xdf/0x300 mm/slub.c:5757 free_to_pcs mm/slub.c:5810 [inline] slab_free mm/slub.c:6249 [inline] kfree+0x361/0x3a0 mm/slub.c:6561 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+0x219/0x490 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 BUG: memory leak unreferenced object 0xffff888101d18800 (size 512): comm "kworker/0:1", pid 10, jiffies 4294937813 hex dump (first 32 bytes): 00 c8 ec 0b 81 88 ff ff 00 18 d3 0b 81 88 ff ff ................ 00 12 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace (crc 307f46be): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2768 alloc_empty_sheaf mm/slub.c:2783 [inline] __pcs_replace_full_main+0xdf/0x300 mm/slub.c:5757 free_to_pcs mm/slub.c:5810 [inline] slab_free mm/slub.c:6249 [inline] kfree+0x361/0x3a0 mm/slub.c:6561 vfree mm/vmalloc.c:3476 [inline] vfree+0x14d/0x3d0 mm/vmalloc.c:3436 delayed_vfree_work+0x29/0x40 mm/vmalloc.c:3392 process_one_work+0x277/0x5b0 kernel/workqueue.c:3302 process_scheduled_works kernel/workqueue.c:3385 [inline] worker_thread+0x255/0x4a0 kernel/workqueue.c:3466 kthread+0x14e/0x1a0 kernel/kthread.c:436 ret_from_fork+0x219/0x490 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 BUG: memory leak unreferenced object 0xffff888101d2be00 (size 512): comm "kworker/0:1", pid 10, jiffies 4294937856 hex dump (first 32 bytes): c8 2c 04 00 81 88 ff ff 00 90 b7 2a 81 88 ff ff .,.........*.... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 9ff75ca2): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2768 alloc_empty_sheaf mm/slub.c:2783 [inline] __pcs_replace_full_main+0xdf/0x300 mm/slub.c:5757 free_to_pcs mm/slub.c:5810 [inline] slab_free mm/slub.c:6249 [inline] kfree+0x361/0x3a0 mm/slub.c:6561 vfree mm/vmalloc.c:3476 [inline] vfree+0x14d/0x3d0 mm/vmalloc.c:3436 delayed_vfree_work+0x29/0x40 mm/vmalloc.c:3392 process_one_work+0x277/0x5b0 kernel/workqueue.c:3302 process_scheduled_works kernel/workqueue.c:3385 [inline] worker_thread+0x255/0x4a0 kernel/workqueue.c:3466 kthread+0x14e/0x1a0 kernel/kthread.c:436 ret_from_fork+0x219/0x490 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 BUG: memory leak unreferenced object 0xffff888101d2b000 (size 512): comm "kworker/u8:9", pid 4643, jiffies 4294937873 hex dump (first 32 bytes): 00 72 5a 03 81 88 ff ff c8 2c 04 00 81 88 ff ff .rZ......,...... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc bcccad5b): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2768 alloc_empty_sheaf mm/slub.c:2783 [inline] __pcs_replace_full_main+0xdf/0x300 mm/slub.c:5757 free_to_pcs mm/slub.c:5810 [inline] slab_free mm/slub.c:6249 [inline] kfree+0x361/0x3a0 mm/slub.c:6561 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+0x219/0x490 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 BUG: memory leak unreferenced object 0xffff8881035a7400 (size 512): comm "udevadm", pid 4981, jiffies 4294938333 hex dump (first 32 bytes): 00 88 b7 2a 81 88 ff ff 00 4e d0 01 81 88 ff ff ...*.....N...... 00 12 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace (crc 82d289ee): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4574 [inline] slab_alloc_node mm/slub.c:4898 [inline] __do_kmalloc_node mm/slub.c:5294 [inline] __kmalloc_noprof+0x3b7/0x550 mm/slub.c:5307 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2768 alloc_empty_sheaf mm/slub.c:2783 [inline] __pcs_replace_empty_main+0x22a/0x2a0 mm/slub.c:4646 alloc_from_pcs mm/slub.c:4749 [inline] slab_alloc_node mm/slub.c:4883 [inline] __kmalloc_cache_noprof+0x3a6/0x480 mm/slub.c:5410 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+0x4f4/0x580 fs/kernfs/file.c:718 do_dentry_open+0x1fc/0x8c0 fs/open.c:947 vfs_open+0x3d/0x1b0 fs/open.c:1079 do_open fs/namei.c:4699 [inline] path_openat+0x154d/0x1e20 fs/namei.c:4858 do_file_open+0x121/0x200 fs/namei.c:4887 do_sys_openat2+0xa5/0x140 fs/open.c:1364 do_sys_open fs/open.c:1370 [inline] __do_sys_openat fs/open.c:1386 [inline] __se_sys_openat fs/open.c:1381 [inline] __x64_sys_openat+0x82/0xf0 fs/open.c:1381 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xee/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: 66edb901 Merge tag 'v7.1-p3' of git://git.kernel.org/p.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13db0ad2580000 kernel config: https://syzkaller.appspot.com/x/.config?x=9645c21cfd1d3e8f 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=153b7ece580000