[syzbot] [net?] [wireless?] memory leak in regulatory_init_db

From: syzbot
Date: Thu Oct 05 2023 - 11:48:51 EST

Hello,

syzbot found the following issue on:

HEAD commit: 3b517966c561 Merge tag 'dma-mapping-6.6-2023-09-30' of git..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=130dac2a680000
kernel config: https://syzkaller.appspot.com/x/.config?x=aa96152f5a3192e3
dashboard link: https://syzkaller.appspot.com/bug?extid=39ec16ff6cc18b1d066d
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=1695bd3e680000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16ae8c4e680000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/cb67ab976a91/disk-3b517966.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/21326eb3ef67/vmlinux-3b517966.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0a95555fe120/bzImage-3b517966.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+39ec16ff6cc18b1d066d@xxxxxxxxxxxxxxxxxxxxxxxxx

executing program
BUG: memory leak
unreferenced object 0xffff888108f880c0 (size 64):
comm "swapper/0", pid 1, jiffies 4294938895 (age 68.260s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
ff ff ff ff 00 00 00 00 00 00 00 00 30 30 00 00 ............00..
backtrace:
[<ffffffff81574195>] kmalloc_trace+0x25/0x90 mm/slab_common.c:1114
[<ffffffff875a3f05>] kmalloc include/linux/slab.h:599 [inline]
[<ffffffff875a3f05>] kzalloc include/linux/slab.h:720 [inline]
[<ffffffff875a3f05>] regulatory_hint_core net/wireless/reg.c:3218 [inline]
[<ffffffff875a3f05>] regulatory_init_db+0xe5/0x1d0 net/wireless/reg.c:4290
[<ffffffff81001cb6>] do_one_initcall+0x76/0x430 init/main.c:1232
[<ffffffff874d86ea>] do_initcall_level init/main.c:1294 [inline]
[<ffffffff874d86ea>] do_initcalls init/main.c:1310 [inline]
[<ffffffff874d86ea>] do_basic_setup init/main.c:1329 [inline]
[<ffffffff874d86ea>] kernel_init_freeable+0x25a/0x460 init/main.c:1547
[<ffffffff84b3928b>] kernel_init+0x1b/0x290 init/main.c:1437
[<ffffffff81149f25>] ret_from_fork+0x45/0x50 arch/x86/kernel/process.c:147
[<ffffffff81002be1>] ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304

BUG: memory leak
unreferenced object 0xffff88814490d800 (size 2048):
comm "syz-executor220", pid 5026, jiffies 4294943369 (age 23.530s)
hex dump (first 32 bytes):
d8 4c a8 0d 81 88 ff ff 22 01 00 00 00 00 ad de .L......".......
00 00 00 00 ff ff ff ff ff ff 00 aa aa aa aa aa ................
backtrace:
[<ffffffff81574195>] kmalloc_trace+0x25/0x90 mm/slab_common.c:1114
[<ffffffff84527e6f>] kmalloc include/linux/slab.h:599 [inline]
[<ffffffff84527e6f>] kzalloc include/linux/slab.h:720 [inline]
[<ffffffff84527e6f>] hci_conn_add+0x4f/0x5e0 net/bluetooth/hci_conn.c:957
[<ffffffff84528668>] hci_connect_acl+0x198/0x1b0 net/bluetooth/hci_conn.c:1632
[<ffffffff8452b4cb>] hci_connect_sco+0x4b/0x520 net/bluetooth/hci_conn.c:1685
[<ffffffff8459d6b3>] sco_connect net/bluetooth/sco.c:266 [inline]
[<ffffffff8459d6b3>] sco_sock_connect+0x1c3/0x520 net/bluetooth/sco.c:591
[<ffffffff83e96b01>] __sys_connect_file+0x91/0xb0 net/socket.c:2033
[<ffffffff83e96c06>] __sys_connect+0xe6/0x110 net/socket.c:2050
[<ffffffff83e96c4c>] __do_sys_connect net/socket.c:2060 [inline]
[<ffffffff83e96c4c>] __se_sys_connect net/socket.c:2057 [inline]
[<ffffffff83e96c4c>] __x64_sys_connect+0x1c/0x20 net/socket.c:2057
[<ffffffff84b33fc8>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
[<ffffffff84b33fc8>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
[<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd

BUG: memory leak
unreferenced object 0xffff8881091dc400 (size 512):
comm "kworker/u5:2", pid 5022, jiffies 4294943869 (age 18.530s)
hex dump (first 32 bytes):
00 d8 90 44 81 88 ff ff c0 b9 e2 0c 81 88 ff ff ...D............
fd 03 00 00 00 00 00 00 00 06 0c 00 00 00 00 00 ................
backtrace:
[<ffffffff81574195>] kmalloc_trace+0x25/0x90 mm/slab_common.c:1114
[<ffffffff845627dd>] kmalloc include/linux/slab.h:599 [inline]
[<ffffffff845627dd>] kzalloc include/linux/slab.h:720 [inline]
[<ffffffff845627dd>] l2cap_conn_add.part.0+0x3d/0x340 net/bluetooth/l2cap_core.c:7845
[<ffffffff845703b4>] l2cap_conn_add net/bluetooth/l2cap_core.c:71 [inline]
[<ffffffff845703b4>] l2cap_connect_cfm+0x264/0x740 net/bluetooth/l2cap_core.c:8242
[<ffffffff8452ba43>] hci_connect_cfm include/net/bluetooth/hci_core.h:1935 [inline]
[<ffffffff8452ba43>] hci_conn_failed+0xa3/0x120 net/bluetooth/hci_conn.c:1251
[<ffffffff84594cc6>] hci_abort_conn_sync+0x4d6/0x6d0 net/bluetooth/hci_sync.c:5435
[<ffffffff8452560d>] abort_conn_sync+0x7d/0xa0 net/bluetooth/hci_conn.c:2894
[<ffffffff8458b3ad>] hci_cmd_sync_work+0xcd/0x150 net/bluetooth/hci_sync.c:306
[<ffffffff812c8d9d>] process_one_work+0x23d/0x530 kernel/workqueue.c:2630
[<ffffffff812c99c7>] process_scheduled_works kernel/workqueue.c:2703 [inline]
[<ffffffff812c99c7>] worker_thread+0x327/0x590 kernel/workqueue.c:2784
[<ffffffff812d6d9b>] kthread+0x12b/0x170 kernel/kthread.c:388
[<ffffffff81149f25>] ret_from_fork+0x45/0x50 arch/x86/kernel/process.c:147
[<ffffffff81002be1>] ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304



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