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AJvYcCWRNbCroIFpqBLgctURldoEfnrtC7uID7HiqDKSeDNC7f8fHvpM+YdTAa8yaQJIdh9TY0Xc84G0Fg==@kvack.org X-Gm-Message-State: AOJu0YzPGOkH50VYwQAgmEEWdETJuA0VXJK3Nq41zffXS8wrUyfz8/mU s+W30ovc0UEYGs4oQxbU8xPotEXK7t4GSY+RkdO3rbRR+cstcDuXu9OIHXWWENgwd6SwrWHKSEP LhOMNcIDuPiX/fNSKyd9Zg4gj3wr6FIhAPH0+E+Z6rfL6cIB+6Ha59lTi2to= MIME-Version: 1.0 X-Received: by 2002:a4a:edc8:0:b0:662:f763:c539 with SMTP id 006d021491bc7-67b9bc6ad80mr8703060eaf.14.1773114843722; Mon, 09 Mar 2026 20:54:03 -0700 (PDT) Date: Mon, 09 Mar 2026 20:54:03 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69af95db.a00a0220.d013.0001.GAE@google.com> Subject: Re: [syzbot] [mm?] [f2fs?] [exfat?] memory leak in __kfree_rcu_sheaf From: syzbot To: akpm@linux-foundation.org, catalin.marinas@arm.com, chao@kernel.org, hao.li@linux.dev, harry.yoo@oracle.com, 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@kernel.org, vbabka@suse.cz, wangqing7171@gmail.com Content-Type: text/plain; charset="UTF-8" X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: C125980009 X-Stat-Signature: 9p891zjt4amib1wyr87o7hcqb39g3y7f X-Rspam-User: X-HE-Tag: 1773114844-177416 X-HE-Meta: U2FsdGVkX1/rr+wixMqakkR03sMqny42jvYFyM7er2/K1DWB0crEhXwrjtZ+GWYb8F9Jcr2rBETJTEhb98Kq8i6+C5b+BuwP3+wtG6OdFZqrdcJqx1d56RGOpwJnWUHrPNK2f9t1w7dlP2o62gPf+/rwzYhR5+sfW60GUBHVCXUxToLiz78oc8xFl0eaqZrUOwFMZJtCAzW6WIHyn4xF/PQQXb6968r7rjbcePx+eEjApOSEJmhA6E7+TnelV9lAYLHWumBYteIlNCRpQxddFcZbLiy2FA7oVM9kWCIhSlZDUsSC3wDFRkliAZzSHztj7KL+tYmOHz6CdLazVnzrBQQt58adKE9l4j+F13hKWpTEgpOtF19oPIzHuvdgG4lg8nMdravx/592tLHjSRxi4ce8xGzSice92mGOQqfmyVdx1sKrl0/9tlGSGW9XxhE8zcFQmsqGjIVOcSzr0UXbXnDXh0oFQycVFWMbjlgkGW+a/tmSJN51dgxZz1idN81lo5XCfoqLLpSBr+dMDuMU4vNF6X0aph1xyC3S8C4KranoK+ANo9CcnvLZ5C1XVFlIo/zwVl3Rx41sMrTqa2nZawjN/4ApC3fXkdSnXNiKvzhoyigwBtLac3N6ZdevB4fkTPmRa3GyqTJ+YQCipO4aGjubkD3Re6lgpCwrHivRKx4ydUIjR880sHZruW/VoaYop3bYGnvYsi2pj/aVm6cWkI0MfvSljtF1imczL/MaZUCcQS10FYSkovU7M6wpmk9OaG/2fGi8uk3j1rDBP1Id/T3YKhNb9utdjXk4cWA4eJFh78LIkJPJBjAhsRhyFoGJOg+sqgqNjJ1Oj5RdnA2gQB5lIQdG68eIqDhFMDCtVtDwMRSF8cGxAdOeI/wZiqRMRUmmd0q6ybqkgZf0OAmSlb545swzRlHQUGKs3aITPXYxRAlznrh9eCXxvswI4YjOXivqv5LulPSEJpZNCaV q7Up2Z1l 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 y07UE0pY cXYpmWgiGsAfyjcIwOgodjqkhicTTyi0ovhZrHmmdC7WQqFqtzvgtw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 0xffff888100b60200 (size 512): comm "kthreadd", pid 2, jiffies 4294937343 hex dump (first 32 bytes): 00 6c c3 09 81 88 ff ff 00 9a 9d 0a 81 88 ff ff .l.............. 00 16 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace (crc 8a95531e): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4552 [inline] slab_alloc_node mm/slub.c:4874 [inline] __do_kmalloc_node mm/slub.c:5267 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5280 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+0x1d2/0x260 mm/slub.c:4634 alloc_from_pcs mm/slub.c:4725 [inline] slab_alloc_node mm/slub.c:4859 [inline] __do_kmalloc_node mm/slub.c:5267 [inline] __kmalloc_node_noprof+0x57e/0x5d0 mm/slub.c:5274 kmalloc_node_noprof include/linux/slab.h:1081 [inline] __vmalloc_area_node mm/vmalloc.c:3855 [inline] __vmalloc_node_range_noprof+0x284/0xe50 mm/vmalloc.c:4064 __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:459 [inline] kthreadd+0x186/0x250 kernel/kthread.c:817 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 0xffff88810438c200 (size 512): comm "swapper/0", pid 1, jiffies 4294937794 hex dump (first 32 bytes): 00 02 10 0e 81 88 ff ff 00 56 c3 09 81 88 ff ff .........V...... 00 17 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 3e1bb722): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4552 [inline] slab_alloc_node mm/slub.c:4874 [inline] __do_kmalloc_node mm/slub.c:5267 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5280 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+0xe8/0x300 mm/slub.c:5730 free_to_pcs mm/slub.c:5783 [inline] slab_free mm/slub.c:6185 [inline] kfree+0x352/0x390 mm/slub.c:6498 v4l2_ctrl_handler_free drivers/media/v4l2-core/v4l2-ctrls-core.c:1756 [inline] v4l2_ctrl_handler_free+0x92/0x290 drivers/media/v4l2-core/v4l2-ctrls-core.c:1736 vivid_dev_release+0x26/0x90 drivers/media/test-drivers/vivid/vivid-core.c:857 v4l2_device_release drivers/media/v4l2-core/v4l2-device.c:51 [inline] kref_put include/linux/kref.h:65 [inline] v4l2_device_put+0x6b/0xa0 drivers/media/v4l2-core/v4l2-device.c:56 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:2070 [inline] vivid_probe.cold+0x55a/0x386d drivers/media/test-drivers/vivid/vivid-core.c:2095 platform_probe+0x86/0xf0 drivers/base/platform.c:1446 call_driver_probe drivers/base/dd.c:583 [inline] really_probe+0x12f/0x3a0 drivers/base/dd.c:661 __driver_probe_device+0xc7/0x160 drivers/base/dd.c:803 driver_probe_device+0x2a/0x120 drivers/base/dd.c:833 __driver_attach drivers/base/dd.c:1227 [inline] __driver_attach+0x10a/0x200 drivers/base/dd.c:1167 bus_for_each_dev+0xb8/0x120 drivers/base/bus.c:383 bus_add_driver+0x122/0x280 drivers/base/bus.c:715 driver_register+0xb1/0x140 drivers/base/driver.c:249 BUG: memory leak unreferenced object 0xffff888109c35c00 (size 512): comm "kworker/0:1", pid 10, jiffies 4294937868 hex dump (first 32 bytes): 00 68 d4 09 81 88 ff ff 00 9c de 09 81 88 ff ff .h.............. 00 16 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace (crc 9ab54a7c): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4552 [inline] slab_alloc_node mm/slub.c:4874 [inline] __do_kmalloc_node mm/slub.c:5267 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5280 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+0xe8/0x300 mm/slub.c:5730 free_to_pcs mm/slub.c:5783 [inline] slab_free mm/slub.c:6185 [inline] kfree+0x352/0x390 mm/slub.c:6498 vfree.part.0+0x1cd/0x4d0 mm/vmalloc.c:3484 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:436 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 0xffff88810a9d9a00 (size 512): comm "swapper/0", pid 1, jiffies 4294937887 hex dump (first 32 bytes): 00 02 b6 00 81 88 ff ff 00 98 9d 0a 81 88 ff ff ................ 00 16 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace (crc 368f6316): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4552 [inline] slab_alloc_node mm/slub.c:4874 [inline] __do_kmalloc_node mm/slub.c:5267 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5280 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+0xe8/0x300 mm/slub.c:5730 free_to_pcs mm/slub.c:5783 [inline] slab_free mm/slub.c:6185 [inline] kfree+0x352/0x390 mm/slub.c:6498 slab_sysfs_init+0xce/0xf0 mm/slub.c:9613 do_one_initcall+0x79/0x4c0 init/main.c:1382 do_initcall_level init/main.c:1444 [inline] do_initcalls init/main.c:1460 [inline] do_basic_setup init/main.c:1479 [inline] kernel_init_freeable+0x2a4/0x340 init/main.c:1692 kernel_init+0x1b/0x1d0 init/main.c:1582 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 0xffff88810a9d9600 (size 512): comm "swapper/0", pid 1, jiffies 4294937887 hex dump (first 32 bytes): 00 b6 34 0a 81 88 ff ff 00 6c c3 09 81 88 ff ff ..4......l...... 00 16 04 00 81 88 ff ff 00 00 00 00 00 00 00 00 ................ backtrace (crc d6fcd7dc): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4552 [inline] slab_alloc_node mm/slub.c:4874 [inline] __do_kmalloc_node mm/slub.c:5267 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5280 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+0xe8/0x300 mm/slub.c:5730 free_to_pcs mm/slub.c:5783 [inline] slab_free mm/slub.c:6185 [inline] kfree+0x352/0x390 mm/slub.c:6498 slab_sysfs_init+0xce/0xf0 mm/slub.c:9613 do_one_initcall+0x79/0x4c0 init/main.c:1382 do_initcall_level init/main.c:1444 [inline] do_initcalls init/main.c:1460 [inline] do_basic_setup init/main.c:1479 [inline] kernel_init_freeable+0x2a4/0x340 init/main.c:1692 kernel_init+0x1b/0x1d0 init/main.c:1582 ret_from_fork+0x23c/0x4b0 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: 1f318b96 Linux 7.0-rc3 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17bde806580000 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=1065375a580000