From: syzbot <syzbot+cae7809e9dc1459e4e63@syzkaller.appspotmail.com>
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
Subject: Re: [syzbot] [mm?] [f2fs?] [exfat?] memory leak in __kfree_rcu_sheaf
Date: Tue, 17 Mar 2026 22:02:01 -0700 [thread overview]
Message-ID: <69ba31c9.050a0220.3077e3.0002.GAE@google.com> (raw)
In-Reply-To: <abolyGbAyynUANDB@hyeyoo>
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
next prev parent reply other threads:[~2026-03-18 5:02 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-09 18:26 [syzbot] [mm?] [f2fs?] [exfat?] memory leak in __kfree_rcu_sheaf syzbot
2026-03-02 3:41 ` Qing Wang
2026-03-02 3:57 ` syzbot
2026-03-02 8:39 ` Vlastimil Babka (SUSE)
2026-03-04 1:30 ` Harry Yoo
2026-03-04 13:39 ` Vlastimil Babka (SUSE)
2026-03-06 19:35 ` Catalin Marinas
2026-03-08 11:02 ` Catalin Marinas
2026-03-08 12:31 ` syzbot
2026-03-08 11:04 ` Catalin Marinas
2026-03-08 12:42 ` syzbot
2026-03-09 10:46 ` Harry Yoo
2026-03-09 11:11 ` syzbot
2026-03-09 12:17 ` Harry Yoo
2026-03-09 20:31 ` Catalin Marinas
2026-03-11 3:04 ` Harry Yoo
2026-03-11 3:20 ` Harry Yoo
2026-03-10 3:39 ` Harry Yoo
2026-03-10 3:54 ` syzbot
2026-03-10 6:11 ` Harry Yoo
2026-03-10 6:29 ` syzbot
2026-03-10 8:10 ` Harry Yoo
2026-03-10 9:40 ` syzbot
2026-03-18 2:34 ` Harry Yoo
2026-03-18 3:08 ` syzbot
2026-03-18 4:10 ` Harry Yoo
2026-03-18 5:02 ` syzbot [this message]
2026-03-11 9:57 ` Qing Wang
2026-03-11 10:17 ` syzbot
2026-03-11 10:48 ` Qing Wang
2026-03-11 11:03 ` syzbot
2026-03-11 11:23 ` Harry Yoo
2026-03-20 0:06 ` Harry Yoo
2026-03-20 10:34 ` syzbot
2026-03-20 11:20 ` Harry Yoo
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=69ba31c9.050a0220.3077e3.0002.GAE@google.com \
--to=syzbot+cae7809e9dc1459e4e63@syzkaller.appspotmail.com \
--cc=akpm@linux-foundation.org \
--cc=catalin.marinas@arm.com \
--cc=chao@kernel.org \
--cc=hao.li@linux.dev \
--cc=harry.yoo@oracle.com \
--cc=jaegeuk@kernel.org \
--cc=jannh@google.com \
--cc=liam.howlett@oracle.com \
--cc=linkinjeon@kernel.org \
--cc=linux-f2fs-devel@lists.sourceforge.net \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=lorenzo.stoakes@oracle.com \
--cc=pfalcato@suse.de \
--cc=sj1557.seo@samsung.com \
--cc=syzkaller-bugs@googlegroups.com \
--cc=vbabka@kernel.org \
--cc=vbabka@suse.cz \
--cc=wangqing7171@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox