From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f72.google.com (mail-ot1-f72.google.com [209.85.210.72]) (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 97EFE33E37A for ; Mon, 4 May 2026 21:12:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777929125; cv=none; b=rzA4yflKDYvxuBBLkHralH6IVQcjBL6Il2oG+j1vHmu1ftZpiR7wGHJTTy4fRodh1uBL0s9KvRWA0yAKGFdYjcO0rDwoyhyLCv5/Yzahqhg2X8WC+BjDAImX0U4UJFpFpGuSsiDsdRgriBrZrq+Sv4OW5igszdpjrcMi9f4BGMg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777929125; c=relaxed/simple; bh=piKeknRA0FM2ffTMiz94tMScAA1j4msi7rvBXo3BA+g=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; 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006d021491bc7-69697de88c3mr6094119eaf.59.1777929122596; Mon, 04 May 2026 14:12:02 -0700 (PDT) Date: Mon, 04 May 2026 14:12:02 -0700 In-Reply-To: <13bb1c13-98b6-4a4a-b03d-ba0f88680f1e@dev.snart.me> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69f90ba2.170a0220.bb392.0007.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): 40 a0 ce 2f 81 88 ff ff e0 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 6fa78c59): 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:5414 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 0xffff888100902c00 (size 512): comm "kthreadd", pid 2, jiffies 4294937340 hex dump (first 32 bytes): 70 09 2a 29 81 88 ff ff e0 13 ad 81 ff ff ff ff p.*)............ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 638a9d9a): 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:5427 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 0xffff888100f8fa00 (size 512): comm "kworker/1:1", pid 41, jiffies 4294937424 hex dump (first 32 bytes): 38 42 0d 30 81 88 ff ff e0 13 ad 81 ff ff ff ff 8B.0............ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 185e046f): 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:5761 free_to_pcs mm/slub.c:5814 [inline] slab_free mm/slub.c:6253 [inline] kfree+0x361/0x3a0 mm/slub.c:6565 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 0xffff88810255bc00 (size 512): comm "kworker/u8:2", pid 498, jiffies 4294937434 hex dump (first 32 bytes): 80 35 67 2e 81 88 ff ff e0 13 ad 81 ff ff ff ff .5g............. 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 804b7261): 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:5761 free_to_pcs mm/slub.c:5814 [inline] slab_free mm/slub.c:6253 [inline] kfree+0x361/0x3a0 mm/slub.c:6565 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 0xffff88810256da00 (size 512): comm "kworker/0:1", pid 10, jiffies 4294937506 hex dump (first 32 bytes): 40 40 38 2d 81 88 ff ff e0 13 ad 81 ff ff ff ff @@8-............ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc e83216dd): 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:5761 free_to_pcs mm/slub.c:5814 [inline] slab_free mm/slub.c:6253 [inline] kfree+0x361/0x3a0 mm/slub.c:6565 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 0xffff8881069d1400 (size 512): comm "kworker/0:1", pid 10, jiffies 4294937917 hex dump (first 32 bytes): 78 b7 d0 2f 81 88 ff ff e0 13 ad 81 ff ff ff ff x../............ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 927c2de1): 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:5761 free_to_pcs mm/slub.c:5814 [inline] slab_free mm/slub.c:6253 [inline] kfree+0x361/0x3a0 mm/slub.c:6565 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 connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF Tested on: commit: c7e4e4d5 Merge tag 'for-linus-7.1-2' of https://github.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16963a36580000 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=1650eb26580000