Message-ID: <000000000000ab9af106150da113@google.com>
Date: Mon, 01 Apr 2024 12:02:31 -0700
From: syzbot <syzbot+e1c69cadec0f1a078e3d@...kaller.appspotmail.com>
To: johan.hedberg@...il.com, linux-bluetooth@...r.kernel.org, 
	linux-kernel@...r.kernel.org, luiz.dentz@...il.com, marcel@...tmann.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bluetooth?] memory leak in corrupted (2)

Hello,

syzbot found the following issue on:

HEAD commit:    39cd87c4eb2b Linux 6.9-rc2
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1605e039180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=25b176ce9d4c8dbf
dashboard link: https://syzkaller.appspot.com/bug?extid=e1c69cadec0f1a078e3d
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10c59af9180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/69179c757379/disk-39cd87c4.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/adff5d3652af/vmlinux-39cd87c4.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b614bf284a7d/bzImage-39cd87c4.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e1c69cadec0f1a078e3d@...kaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888109ffe280 (size 640):
  comm "syz-executor.0", pid 5071, jiffies 4294942273
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 01 1a 0c 01 02 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc d037fcd3):
    [<ffffffff8165cfec>] kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]
    [<ffffffff8165cfec>] slab_post_alloc_hook mm/slub.c:3802 [inline]
    [<ffffffff8165cfec>] slab_alloc_node mm/slub.c:3845 [inline]
    [<ffffffff8165cfec>] kmem_cache_alloc_node+0x28c/0x330 mm/slub.c:3888
    [<ffffffff84337006>] kmalloc_reserve+0xe6/0x180 net/core/skbuff.c:577
    [<ffffffff8433aa85>] __alloc_skb+0xd5/0x220 net/core/skbuff.c:668
    [<ffffffff84a79b1b>] alloc_skb include/linux/skbuff.h:1313 [inline]
    [<ffffffff84a79b1b>] bt_skb_alloc include/net/bluetooth/bluetooth.h:489 [inline]
    [<ffffffff84a79b1b>] hci_prepare_cmd+0x2b/0xb0 net/bluetooth/hci_request.c:219
    [<ffffffff84a7a147>] hci_req_add_ev net/bluetooth/hci_request.c:253 [inline]
    [<ffffffff84a7a147>] hci_req_add+0x57/0xe0 net/bluetooth/hci_request.c:273
    [<ffffffff84a0c231>] hci_scan_req+0x41/0x70 net/bluetooth/hci_core.c:73
    [<ffffffff84a79550>] __hci_req_sync+0x70/0x3c0 net/bluetooth/hci_request.c:128
    [<ffffffff84a79aa7>] hci_req_sync+0x67/0xa0 net/bluetooth/hci_request.c:204
    [<ffffffff84a117d3>] hci_dev_cmd+0x3f3/0x550 net/bluetooth/hci_core.c:790
    [<ffffffff84a5436c>] hci_sock_ioctl+0x3ec/0x6f0 net/bluetooth/hci_sock.c:1153
    [<ffffffff843227d2>] sock_do_ioctl+0x82/0x1a0 net/socket.c:1222
    [<ffffffff843249fe>] sock_ioctl+0x14e/0x480 net/socket.c:1341
    [<ffffffff817356f6>] vfs_ioctl fs/ioctl.c:51 [inline]
    [<ffffffff817356f6>] __do_sys_ioctl fs/ioctl.c:904 [inline]
    [<ffffffff817356f6>] __se_sys_ioctl fs/ioctl.c:890 [inline]
    [<ffffffff817356f6>] __x64_sys_ioctl+0xf6/0x150 fs/ioctl.c:890
    [<ffffffff85089f05>] do_syscall_x64 arch/x86/entry/common.c:52 [inline]
    [<ffffffff85089f05>] do_syscall_64+0xa5/0x1e0 arch/x86/entry/common.c:83
    [<ffffffff8520012b>] entry_SYSCALL_64_after_hwframe+0x72/0x7a

BUG: memory leak
unreferenced object 0xffff88810c96b300 (size 240):
  comm "kworker/u9:1", pid 4479, jiffies 4294942273
  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 b92bbddd):
    [<ffffffff8165c6c1>] kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]
    [<ffffffff8165c6c1>] slab_post_alloc_hook mm/slub.c:3802 [inline]
    [<ffffffff8165c6c1>] slab_alloc_node mm/slub.c:3845 [inline]
    [<ffffffff8165c6c1>] kmem_cache_alloc+0x271/0x310 mm/slub.c:3852
    [<ffffffff84341f6a>] skb_clone+0xaa/0x190 net/core/skbuff.c:2063
    [<ffffffff84a0cbdb>] hci_send_cmd_sync net/bluetooth/hci_core.c:4220 [inline]
    [<ffffffff84a0cbdb>] hci_cmd_work+0x1db/0x200 net/bluetooth/hci_core.c:4240
    [<ffffffff812ec200>] process_one_work+0x290/0x630 kernel/workqueue.c:3254
    [<ffffffff812ed22d>] process_scheduled_works kernel/workqueue.c:3335 [inline]
    [<ffffffff812ed22d>] worker_thread+0x2bd/0x510 kernel/workqueue.c:3416
    [<ffffffff812fb36c>] kthread+0xfc/0x140 kernel/kthread.c:388
    [<ffffffff811582b5>] ret_from_fork+0x45/0x60 arch/x86/kernel/process.c:147
    [<ffffffff81002efa>] ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243



---
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