From: syzbot <syzbot+f098d64cc684b8dbaf65@syzkaller.appspotmail.com>
To: eadavis@qq.com, linux-kernel@vger.kernel.org,
syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [bluetooth?] [usb?] memory leak in __hci_cmd_sync_sk
Date: Tue, 18 Nov 2025 19:47:05 -0800 [thread overview]
Message-ID: <691d3db9.a70a0220.2ea503.000b.GAE@google.com> (raw)
In-Reply-To: <tencent_9C661E3DE33650961836F04BB8759D765309@qq.com>
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
memory leak in __hci_cmd_sync_sk
BUG: memory leak
unreferenced object 0xffff8881195a5a00 (size 240):
comm "kworker/u9:1", pid 5135, jiffies 4294947360
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 5842d197):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5340
__alloc_skb+0x203/0x240 net/core/skbuff.c:660
alloc_skb include/linux/skbuff.h:1383 [inline]
bt_skb_alloc include/net/bluetooth/bluetooth.h:510 [inline]
hci_cmd_sync_alloc+0x30/0x140 net/bluetooth/hci_sync.c:58
hci_cmd_sync_add net/bluetooth/hci_sync.c:99 [inline]
__hci_cmd_sync_sk+0x84/0x290 net/bluetooth/hci_sync.c:168
__hci_cmd_sync_ev+0x3e/0x50 net/bluetooth/hci_sync.c:259
send_hci_cmd_sync+0x5e/0xf0 net/bluetooth/mgmt.c:2615
hci_cmd_sync_work+0xd5/0x160 net/bluetooth/hci_sync.c:341
process_one_work+0x26b/0x620 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x2c4/0x4f0 kernel/workqueue.c:3427
kthread+0x15b/0x310 kernel/kthread.c:463
ret_from_fork+0x210/0x240 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
BUG: memory leak
unreferenced object 0xffff8881099e1e40 (size 704):
comm "kworker/u9:1", pid 5135, jiffies 4294947360
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 4e765d9f):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5340
kmalloc_reserve+0xe6/0x180 net/core/skbuff.c:579
__alloc_skb+0xd4/0x240 net/core/skbuff.c:670
alloc_skb include/linux/skbuff.h:1383 [inline]
bt_skb_alloc include/net/bluetooth/bluetooth.h:510 [inline]
hci_cmd_sync_alloc+0x30/0x140 net/bluetooth/hci_sync.c:58
hci_cmd_sync_add net/bluetooth/hci_sync.c:99 [inline]
__hci_cmd_sync_sk+0x84/0x290 net/bluetooth/hci_sync.c:168
__hci_cmd_sync_ev+0x3e/0x50 net/bluetooth/hci_sync.c:259
send_hci_cmd_sync+0x5e/0xf0 net/bluetooth/mgmt.c:2615
hci_cmd_sync_work+0xd5/0x160 net/bluetooth/hci_sync.c:341
process_one_work+0x26b/0x620 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x2c4/0x4f0 kernel/workqueue.c:3427
kthread+0x15b/0x310 kernel/kthread.c:463
ret_from_fork+0x210/0x240 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
BUG: memory leak
unreferenced object 0xffff88810c1c2d00 (size 240):
comm "kworker/u9:3", pid 6291, jiffies 4294947641
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 310fcca):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5340
__alloc_skb+0x203/0x240 net/core/skbuff.c:660
alloc_skb include/linux/skbuff.h:1383 [inline]
bt_skb_alloc include/net/bluetooth/bluetooth.h:510 [inline]
hci_cmd_sync_alloc+0x30/0x140 net/bluetooth/hci_sync.c:58
hci_cmd_sync_add net/bluetooth/hci_sync.c:99 [inline]
__hci_cmd_sync_sk+0x84/0x290 net/bluetooth/hci_sync.c:168
__hci_cmd_sync_ev+0x3e/0x50 net/bluetooth/hci_sync.c:259
send_hci_cmd_sync+0x5e/0xf0 net/bluetooth/mgmt.c:2615
hci_cmd_sync_work+0xd5/0x160 net/bluetooth/hci_sync.c:341
process_one_work+0x26b/0x620 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x2c4/0x4f0 kernel/workqueue.c:3427
kthread+0x15b/0x310 kernel/kthread.c:463
ret_from_fork+0x210/0x240 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
BUG: memory leak
unreferenced object 0xffff888108e61080 (size 704):
comm "kworker/u9:3", pid 6291, jiffies 4294947641
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 4e765d9f):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5340
kmalloc_reserve+0xe6/0x180 net/core/skbuff.c:579
__alloc_skb+0xd4/0x240 net/core/skbuff.c:670
alloc_skb include/linux/skbuff.h:1383 [inline]
bt_skb_alloc include/net/bluetooth/bluetooth.h:510 [inline]
hci_cmd_sync_alloc+0x30/0x140 net/bluetooth/hci_sync.c:58
hci_cmd_sync_add net/bluetooth/hci_sync.c:99 [inline]
__hci_cmd_sync_sk+0x84/0x290 net/bluetooth/hci_sync.c:168
__hci_cmd_sync_ev+0x3e/0x50 net/bluetooth/hci_sync.c:259
send_hci_cmd_sync+0x5e/0xf0 net/bluetooth/mgmt.c:2615
hci_cmd_sync_work+0xd5/0x160 net/bluetooth/hci_sync.c:341
process_one_work+0x26b/0x620 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x2c4/0x4f0 kernel/workqueue.c:3427
kthread+0x15b/0x310 kernel/kthread.c:463
ret_from_fork+0x210/0x240 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
BUG: memory leak
unreferenced object 0xffff88810c1c2300 (size 240):
comm "kworker/u9:3", pid 6291, jiffies 4294947776
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc 6674b3fb):
kmemleak_alloc_recursive include/linux/kmemleak.h:44 [inline]
slab_post_alloc_hook mm/slub.c:4983 [inline]
slab_alloc_node mm/slub.c:5288 [inline]
kmem_cache_alloc_node_noprof+0x36f/0x5e0 mm/slub.c:5340
__alloc_skb+0x203/0x240 net/core/skbuff.c:660
alloc_skb include/linux/skbuff.h:1383 [inline]
bt_skb_alloc include/net/bluetooth/bluetooth.h:510 [inline]
hci_cmd_sync_alloc+0x30/0x140 net/bluetooth/hci_sync.c:58
hci_cmd_sync_add net/bluetooth/hci_sync.c:99 [inline]
__hci_cmd_sync_sk+0x84/0x290 net/bluetooth/hci_sync.c:168
__hci_cmd_sync_ev+0x3e/0x50 net/bluetooth/hci_sync.c:259
send_hci_cmd_sync+0x5e/0xf0 net/bluetooth/mgmt.c:2615
hci_cmd_sync_work+0xd5/0x160 net/bluetooth/hci_sync.c:341
process_one_work+0x26b/0x620 kernel/workqueue.c:3263
process_scheduled_works kernel/workqueue.c:3346 [inline]
worker_thread+0x2c4/0x4f0 kernel/workqueue.c:3427
kthread+0x15b/0x310 kernel/kthread.c:463
ret_from_fork+0x210/0x240 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: 8b690556 Merge tag 'for-linus' of git://git.kernel.org..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15e54e0a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f30cc590c4f6da44
dashboard link: https://syzkaller.appspot.com/bug?extid=f098d64cc684b8dbaf65
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=12ede692580000
next prev parent reply other threads:[~2025-11-19 3:47 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-17 14:24 [syzbot] [bluetooth?] [usb?] memory leak in __hci_cmd_sync_sk syzbot
2025-11-18 2:53 ` Edward Adam Davis
2025-11-18 3:24 ` syzbot
2025-11-18 3:40 ` Edward Adam Davis
2025-11-18 3:54 ` syzbot
2025-11-18 3:56 ` Edward Adam Davis
2025-11-18 4:24 ` syzbot
2025-11-19 2:46 ` shaurya
2025-11-19 3:22 ` Edward Adam Davis
2025-11-19 3:47 ` syzbot [this message]
2025-11-19 18:45 ` shaurya
2025-11-19 19:32 ` syzbot
2025-11-20 13:27 ` Edward Adam Davis
2025-11-20 13:59 ` syzbot
2025-11-20 14:11 ` Edward Adam Davis
2025-11-20 14:45 ` syzbot
2025-11-20 14:54 ` Edward Adam Davis
2025-11-20 15:27 ` syzbot
2025-11-21 0:05 ` Edward Adam Davis
2025-11-21 0:34 ` syzbot
2025-11-21 0:55 ` Edward Adam Davis
2025-11-21 2:14 ` syzbot
2025-11-21 0:57 ` Edward Adam Davis
2025-11-21 2:32 ` syzbot
2025-11-21 6:17 ` Edward Adam Davis
2025-11-21 8:08 ` syzbot
2025-11-21 9:06 ` Edward Adam Davis
2025-11-21 14:36 ` syzbot
2025-11-22 7:09 ` Edward Adam Davis
2025-11-22 10:23 ` syzbot
2025-11-22 14:14 ` Edward Adam Davis
2025-11-22 14:39 ` syzbot
2025-11-23 14:05 ` Edward Adam Davis
2025-11-23 15:23 ` syzbot
2025-11-23 14:33 ` Edward Adam Davis
2025-11-23 16:09 ` syzbot
2025-11-23 15:08 ` Edward Adam Davis
2025-11-23 16:30 ` syzbot
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