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id 006d021491bc7-67c0da588ddmr1007794eaf.8.1773810121701; Tue, 17 Mar 2026 22:02:01 -0700 (PDT) Date: Tue, 17 Mar 2026 22:02:01 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69ba31c9.050a0220.3077e3.0002.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" 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 0xffff888129413800 (size 512): comm "kworker/u8:3", pid 58, jiffies 4294947638 hex dump (first 32 bytes): 00 ac 98 1c 81 88 ff ff 00 18 6b 0a 81 88 ff ff ..........k..... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 10da2a4f): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4543 [inline] slab_alloc_node mm/slub.c:4866 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2764 alloc_empty_sheaf mm/slub.c:2779 [inline] alloc_full_sheaf mm/slub.c:2829 [inline] __pcs_replace_empty_main+0x1e0/0x2f0 mm/slub.c:4626 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x4c5/0x560 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] cfg80211_inform_single_bss_data+0x21d/0xa70 net/wireless/scan.c:2344 cfg80211_inform_bss_data+0x13f/0x1dc0 net/wireless/scan.c:3226 cfg80211_inform_bss_frame_data+0x108/0x340 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x13a/0x320 net/mac80211/scan.c:230 ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1575 [inline] ieee80211_ibss_rx_queued_mgmt+0xb75/0x1230 net/mac80211/ibss.c:1602 ieee80211_iface_process_skb net/mac80211/iface.c:1748 [inline] ieee80211_iface_work+0x6af/0x9b0 net/mac80211/iface.c:1802 cfg80211_wiphy_work+0x1db/0x280 net/wireless/core.c:440 process_one_work+0x277/0x5f0 kernel/workqueue.c:3276 process_scheduled_works kernel/workqueue.c:3359 [inline] worker_thread+0x255/0x4a0 kernel/workqueue.c:3440 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 0xffff88812a621a00 (size 512): comm "kworker/u8:3", pid 58, jiffies 4294950606 hex dump (first 32 bytes): 00 18 62 2a 81 88 ff ff 00 d6 04 00 81 88 ff ff ..b*............ 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 231cde90): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4543 [inline] slab_alloc_node mm/slub.c:4866 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2764 alloc_empty_sheaf mm/slub.c:2779 [inline] alloc_full_sheaf mm/slub.c:2829 [inline] __pcs_replace_empty_main+0x1e0/0x2f0 mm/slub.c:4626 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x4c5/0x560 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] cfg80211_inform_single_bss_data+0x21d/0xa70 net/wireless/scan.c:2344 cfg80211_inform_bss_data+0x13f/0x1dc0 net/wireless/scan.c:3226 cfg80211_inform_bss_frame_data+0x108/0x340 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x13a/0x320 net/mac80211/scan.c:230 ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1575 [inline] ieee80211_ibss_rx_queued_mgmt+0xb75/0x1230 net/mac80211/ibss.c:1602 ieee80211_iface_process_skb net/mac80211/iface.c:1748 [inline] ieee80211_iface_work+0x6af/0x9b0 net/mac80211/iface.c:1802 cfg80211_wiphy_work+0x1db/0x280 net/wireless/core.c:440 process_one_work+0x277/0x5f0 kernel/workqueue.c:3276 process_scheduled_works kernel/workqueue.c:3359 [inline] worker_thread+0x255/0x4a0 kernel/workqueue.c:3440 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 0xffff88812a621800 (size 512): comm "kworker/u8:6", pid 932, jiffies 4294950638 hex dump (first 32 bytes): 00 18 6b 0a 81 88 ff ff 00 1a 62 2a 81 88 ff ff ..k.......b*.... 00 12 04 00 81 88 ff ff 3c 00 00 00 00 00 00 00 ........<....... backtrace (crc 9a0f4a55): kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline] slab_post_alloc_hook mm/slub.c:4543 [inline] slab_alloc_node mm/slub.c:4866 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x3bd/0x560 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] __alloc_empty_sheaf+0x35/0x50 mm/slub.c:2764 alloc_empty_sheaf mm/slub.c:2779 [inline] alloc_full_sheaf mm/slub.c:2829 [inline] __pcs_replace_empty_main+0x1e0/0x2f0 mm/slub.c:4626 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] __do_kmalloc_node mm/slub.c:5259 [inline] __kmalloc_noprof+0x4c5/0x560 mm/slub.c:5272 kmalloc_noprof include/linux/slab.h:954 [inline] kzalloc_noprof include/linux/slab.h:1188 [inline] cfg80211_inform_single_bss_data+0x21d/0xa70 net/wireless/scan.c:2344 cfg80211_inform_bss_data+0x13f/0x1dc0 net/wireless/scan.c:3226 cfg80211_inform_bss_frame_data+0x108/0x340 net/wireless/scan.c:3317 ieee80211_bss_info_update+0x13a/0x320 net/mac80211/scan.c:230 ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1575 [inline] ieee80211_ibss_rx_queued_mgmt+0xb75/0x1230 net/mac80211/ibss.c:1602 ieee80211_iface_process_skb net/mac80211/iface.c:1748 [inline] ieee80211_iface_work+0x6af/0x9b0 net/mac80211/iface.c:1802 cfg80211_wiphy_work+0x1db/0x280 net/wireless/core.c:440 process_one_work+0x277/0x5f0 kernel/workqueue.c:3276 process_scheduled_works kernel/workqueue.c:3359 [inline] worker_thread+0x255/0x4a0 kernel/workqueue.c:3440 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 connection error: failed to recv *flatrpc.ExecutorMessageRawT: EOF Tested on: commit: a989fde7 Merge tag 'libnvdimm-fixes-7.0-rc5' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15c4974a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e2bba615ee79faa5 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=178fc216580000