From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f69.google.com (mail-oo1-f69.google.com [209.85.161.69]) (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 61E6330C345 for ; Sat, 2 May 2026 12:02:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.69 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777723324; cv=none; b=cvgdI7miZWEWvB9WMoCNrbDQ81XTt65KNdHfhMQD34f0SIhU/4+FmGfV9DeY2Oh4pl5oNt47NPs9Fs0Co2KMvXIs9xdt+W8wXffDgM2E/7ekxJZ9l1//KXYyLn7m94JZjW1p0ufHW74tsmUp2GbORL4Q+tNeGi1RqNNIc8zjb9U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777723324; c=relaxed/simple; bh=akDHPI7Cy3eudsL06XR4CsclsWV6MxkoxIrpDIQxRPI=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=b36bvZd5FsTTFsyKE7X+XFpY0re60fBjB+CNhIQKM8BTNwwmdaHZBm8dC44Y0t07pgPwF1auF+Ic4tesf7DV8BuTO9MAsNd5TA/M76+9xSLzsTQn9G7Xa0ea2giR0Fq/TCqcSWVxLdKR7jt82152kvG2I8KDbdw8TPyrJDFMOE0= 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=209.85.161.69 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-oo1-f69.google.com with SMTP id 006d021491bc7-696906dddbbso1669909eaf.2 for ; Sat, 02 May 2026 05:02:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777723321; x=1778328121; 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=RK/bteRRks1dopE79lchtLVnVOXOinwm+cOFXDFRvS4=; b=A6B2LQrdFhDLEVbSOxZs3qQMArR/sCCmJ4WrlpElVjCRrvKWXveNEoqbjzgHngiJOY PGFQfJKB8hVvOi5o/b/mMrBbOqHulWX0ihYD1Dh2wCvc9WGLOWwrCbLyuJ27azVg7i6g Jb6CO07cMhFpGLKjuBz16Hr9aZR+sFJ0mrdrPrmr1fps6ewpFYWQ8JykZGEbsxoFN7d7 iEbIhNoklJ+2jxkYRgq3FsqHUL7SZr9HWj/9N1sSCLDCMnOObg0JxSvZh3+9W5H+Iudh mtsgKs0RXhtmAe4VhJq5PtLiAcX+SoMXUzghluRSdwPcJWGc9UhHOsH/5/alTvujCfta gCyQ== X-Forwarded-Encrypted: i=1; AFNElJ9JhQxZLivC2TlY/bi44Q8iWpo5SDFQxuIrNDssJO5BSGRr7Lf0LstDHkZSj4XMK0yXzWxZIWwbDZkmTAQ=@vger.kernel.org X-Gm-Message-State: AOJu0Ywyz1Y7YEE0iM4Na135wO0A6bO0ucO5diU5ZdHgJ/lrZ8Y6g+SM 9Iys4+Gu/WjS5oSr5KCmLghERLfy/gMzv6qOKPoXaOnzqo3bHCBh/drFQTMJ2EkNC/mqYH+Ri8Q nYmBlej7iFaVJOjZmMPrs/eMuOafHPyEA3A7mYuDy6WCm1D2un2llcWEy1C0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4b0f:b0:696:1860:8baf with SMTP id 006d021491bc7-696979d49d1mr1227227eaf.20.1777723321260; Sat, 02 May 2026 05:02:01 -0700 (PDT) Date: Sat, 02 May 2026 05:02:01 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69f5e7b9.050a0220.312cd3.0022.GAE@google.com> Subject: Re: [syzbot] [mm?] [exfat?] [f2fs?] memory leak in __kfree_rcu_sheaf From: syzbot To: dxdt@dev.snart.me, 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 __pcs_replace_empty_main BUG: memory leak unreferenced object 0xffff88810005f600 (size 512): comm "swapper/0", pid 0, jiffies 4294937296 hex dump (first 32 bytes): 00 3c e7 2c 81 88 ff ff 00 4c 90 00 81 88 ff ff .<.,.....L...... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 37d70d29): 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 0xffff888100904c00 (size 512): comm "kthreadd", pid 2, jiffies 4294937342 hex dump (first 32 bytes): 00 f6 05 00 81 88 ff ff 00 ea 3c 04 81 88 ff ff ..........<..... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 22dd8c01): 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_node_noprof+0x3e9/0x4d0 mm/slub.c:5423 kmalloc_node_noprof include/linux/slab.h:1077 [inline] __get_vm_area_node+0xc6/0x1d0 mm/vmalloc.c:3215 __vmalloc_node_range_noprof+0x1bc/0xdf0 mm/vmalloc.c:4024 __vmalloc_node_noprof+0x71/0x90 mm/vmalloc.c:4124 alloc_thread_stack_node kernel/fork.c:357 [inline] dup_task_struct kernel/fork.c:926 [inline] copy_process+0x51f/0x2c90 kernel/fork.c:2090 kernel_clone+0xde/0x700 kernel/fork.c:2721 kernel_thread+0x80/0xb0 kernel/fork.c:2782 create_kthread kernel/kthread.c:459 [inline] kthreadd+0x186/0x250 kernel/kthread.c:817 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 0xffff88810224cc00 (size 512): comm "kworker/1:1", pid 41, jiffies 4294937440 hex dump (first 32 bytes): 00 18 fd 2c 81 88 ff ff 00 e8 3c 04 81 88 ff ff ...,......<..... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 254b2b5e): 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 0xffff8881043cea00 (size 512): comm "kworker/0:1", pid 10, jiffies 4294937496 hex dump (first 32 bytes): 00 4c 90 00 81 88 ff ff 00 4a 73 11 81 88 ff ff .L.......Js..... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc c256e00a): 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 blk_free_flush_queue+0x28/0x40 block/blk-flush.c:514 srcu_invoke_callbacks+0x11a/0x1c0 kernel/rcu/srcutree.c:1917 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 0xffff8881043ce800 (size 512): comm "kworker/0:1", pid 10, jiffies 4294937496 hex dump (first 32 bytes): 00 cc 24 02 81 88 ff ff 00 d4 48 0b 81 88 ff ff ..$.......H..... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 98e15bd5): 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 0xffff88810b41a600 (size 512): comm "udevadm", pid 4977, jiffies 4294938322 hex dump (first 32 bytes): 00 cc 48 0b 81 88 ff ff 00 7e 23 28 81 88 ff ff ..H......~#(.... 00 12 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace (crc ccf4ae11): 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: f1a5e78a Merge tag 'drm-fixes-2026-05-02' of https://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10bff5ba580000 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=13270a36580000