linux-kernel - memory leak in bcsp

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [day] [month] [year] [list]
Message-ID: <00000000000013d4880589b9c7d3@google.com>
Date:   Sat, 25 May 2019 10:38:05 -0700
From:   syzbot <syzbot+98162c885993b72f19c4@...kaller.appspotmail.com>
To:     johan.hedberg@...il.com, linux-bluetooth@...r.kernel.org,
        linux-kernel@...r.kernel.org, marcel@...tmann.org,
        syzkaller-bugs@...glegroups.com
Subject: memory leak in bcsp_recv

Hello,

syzbot found the following crash on:

HEAD commit:    c50bbf61 Merge tag 'platform-drivers-x86-v5.2-2' of git://..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=113f684ca00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=61dd9e15a761691d
dashboard link: https://syzkaller.appspot.com/bug?extid=98162c885993b72f19c4
compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=143fcb8aa00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=137bd84ca00000

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+98162c885993b72f19c4@...kaller.appspotmail.com

9 tx timeout
BUG: memory leak
unreferenced object 0xffff888123ccbc00 (size 224):
   comm "syz-executor717", pid 7249, jiffies 4295003727 (age 28.450s)
   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:
     [<00000000600479ed>] kmemleak_alloc_recursive  
include/linux/kmemleak.h:55 [inline]
     [<00000000600479ed>] slab_post_alloc_hook mm/slab.h:439 [inline]
     [<00000000600479ed>] slab_alloc_node mm/slab.c:3269 [inline]
     [<00000000600479ed>] kmem_cache_alloc_node+0x153/0x2a0 mm/slab.c:3579
     [<0000000059f3ba6b>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198
     [<0000000074e70f06>] alloc_skb include/linux/skbuff.h:1058 [inline]
     [<0000000074e70f06>] bt_skb_alloc include/net/bluetooth/bluetooth.h:339  
[inline]
     [<0000000074e70f06>] bcsp_recv+0x1c3/0x540  
drivers/bluetooth/hci_bcsp.c:685
     [<00000000edf8c323>] hci_uart_tty_receive+0xba/0x200  
drivers/bluetooth/hci_ldisc.c:607
     [<000000009051651a>] tiocsti drivers/tty/tty_io.c:2195 [inline]
     [<000000009051651a>] tty_ioctl+0x81c/0xa30 drivers/tty/tty_io.c:2571
     [<000000005695f2c9>] vfs_ioctl fs/ioctl.c:46 [inline]
     [<000000005695f2c9>] file_ioctl fs/ioctl.c:509 [inline]
     [<000000005695f2c9>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
     [<00000000be82d55d>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
     [<00000000d19fa7dc>] __do_sys_ioctl fs/ioctl.c:720 [inline]
     [<00000000d19fa7dc>] __se_sys_ioctl fs/ioctl.c:718 [inline]
     [<00000000d19fa7dc>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
     [<0000000051eaf016>] do_syscall_64+0x76/0x1a0  
arch/x86/entry/common.c:301
     [<000000000b0b6970>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888123ccbc00 (size 224):
   comm "syz-executor717", pid 7249, jiffies 4295003727 (age 30.380s)
   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:
     [<00000000600479ed>] kmemleak_alloc_recursive  
include/linux/kmemleak.h:55 [inline]
     [<00000000600479ed>] slab_post_alloc_hook mm/slab.h:439 [inline]
     [<00000000600479ed>] slab_alloc_node mm/slab.c:3269 [inline]
     [<00000000600479ed>] kmem_cache_alloc_node+0x153/0x2a0 mm/slab.c:3579
     [<0000000059f3ba6b>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198
     [<0000000074e70f06>] alloc_skb include/linux/skbuff.h:1058 [inline]
     [<0000000074e70f06>] bt_skb_alloc include/net/bluetooth/bluetooth.h:339  
[inline]
     [<0000000074e70f06>] bcsp_recv+0x1c3/0x540  
drivers/bluetooth/hci_bcsp.c:685
     [<00000000edf8c323>] hci_uart_tty_receive+0xba/0x200  
drivers/bluetooth/hci_ldisc.c:607
     [<000000009051651a>] tiocsti drivers/tty/tty_io.c:2195 [inline]
     [<000000009051651a>] tty_ioctl+0x81c/0xa30 drivers/tty/tty_io.c:2571
     [<000000005695f2c9>] vfs_ioctl fs/ioctl.c:46 [inline]
     [<000000005695f2c9>] file_ioctl fs/ioctl.c:509 [inline]
     [<000000005695f2c9>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
     [<00000000be82d55d>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
     [<00000000d19fa7dc>] __do_sys_ioctl fs/ioctl.c:720 [inline]
     [<00000000d19fa7dc>] __se_sys_ioctl fs/ioctl.c:718 [inline]
     [<00000000d19fa7dc>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
     [<0000000051eaf016>] do_syscall_64+0x76/0x1a0  
arch/x86/entry/common.c:301
     [<000000000b0b6970>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888123ccbc00 (size 224):
   comm "syz-executor717", pid 7249, jiffies 4295003727 (age 31.350s)
   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:
     [<00000000600479ed>] kmemleak_alloc_recursive  
include/linux/kmemleak.h:55 [inline]
     [<00000000600479ed>] slab_post_alloc_hook mm/slab.h:439 [inline]
     [<00000000600479ed>] slab_alloc_node mm/slab.c:3269 [inline]
     [<00000000600479ed>] kmem_cache_alloc_node+0x153/0x2a0 mm/slab.c:3579
     [<0000000059f3ba6b>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198
     [<0000000074e70f06>] alloc_skb include/linux/skbuff.h:1058 [inline]
     [<0000000074e70f06>] bt_skb_alloc include/net/bluetooth/bluetooth.h:339  
[inline]
     [<0000000074e70f06>] bcsp_recv+0x1c3/0x540  
drivers/bluetooth/hci_bcsp.c:685
     [<00000000edf8c323>] hci_uart_tty_receive+0xba/0x200  
drivers/bluetooth/hci_ldisc.c:607
     [<000000009051651a>] tiocsti drivers/tty/tty_io.c:2195 [inline]
     [<000000009051651a>] tty_ioctl+0x81c/0xa30 drivers/tty/tty_io.c:2571
     [<000000005695f2c9>] vfs_ioctl fs/ioctl.c:46 [inline]
     [<000000005695f2c9>] file_ioctl fs/ioctl.c:509 [inline]
     [<000000005695f2c9>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
     [<00000000be82d55d>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
     [<00000000d19fa7dc>] __do_sys_ioctl fs/ioctl.c:720 [inline]
     [<00000000d19fa7dc>] __se_sys_ioctl fs/ioctl.c:718 [inline]
     [<00000000d19fa7dc>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
     [<0000000051eaf016>] do_syscall_64+0x76/0x1a0  
arch/x86/entry/common.c:301
     [<000000000b0b6970>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888123ccbc00 (size 224):
   comm "syz-executor717", pid 7249, jiffies 4295003727 (age 31.400s)
   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:
     [<00000000600479ed>] kmemleak_alloc_recursive  
include/linux/kmemleak.h:55 [inline]
     [<00000000600479ed>] slab_post_alloc_hook mm/slab.h:439 [inline]
     [<00000000600479ed>] slab_alloc_node mm/slab.c:3269 [inline]
     [<00000000600479ed>] kmem_cache_alloc_node+0x153/0x2a0 mm/slab.c:3579
     [<0000000059f3ba6b>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198
     [<0000000074e70f06>] alloc_skb include/linux/skbuff.h:1058 [inline]
     [<0000000074e70f06>] bt_skb_alloc include/net/bluetooth/bluetooth.h:339  
[inline]
     [<0000000074e70f06>] bcsp_recv+0x1c3/0x540  
drivers/bluetooth/hci_bcsp.c:685
     [<00000000edf8c323>] hci_uart_tty_receive+0xba/0x200  
drivers/bluetooth/hci_ldisc.c:607
     [<000000009051651a>] tiocsti drivers/tty/tty_io.c:2195 [inline]
     [<000000009051651a>] tty_ioctl+0x81c/0xa30 drivers/tty/tty_io.c:2571
     [<000000005695f2c9>] vfs_ioctl fs/ioctl.c:46 [inline]
     [<000000005695f2c9>] file_ioctl fs/ioctl.c:509 [inline]
     [<000000005695f2c9>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
     [<00000000be82d55d>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
     [<00000000d19fa7dc>] __do_sys_ioctl fs/ioctl.c:720 [inline]
     [<00000000d19fa7dc>] __se_sys_ioctl fs/ioctl.c:718 [inline]
     [<00000000d19fa7dc>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
     [<0000000051eaf016>] do_syscall_64+0x76/0x1a0  
arch/x86/entry/common.c:301
     [<000000000b0b6970>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888123ccbc00 (size 224):
   comm "syz-executor717", pid 7249, jiffies 4295003727 (age 32.360s)
   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:
     [<00000000600479ed>] kmemleak_alloc_recursive  
include/linux/kmemleak.h:55 [inline]
     [<00000000600479ed>] slab_post_alloc_hook mm/slab.h:439 [inline]
     [<00000000600479ed>] slab_alloc_node mm/slab.c:3269 [inline]
     [<00000000600479ed>] kmem_cache_alloc_node+0x153/0x2a0 mm/slab.c:3579
     [<0000000059f3ba6b>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198
     [<0000000074e70f06>] alloc_skb include/linux/skbuff.h:1058 [inline]
     [<0000000074e70f06>] bt_skb_alloc include/net/bluetooth/bluetooth.h:339  
[inline]
     [<0000000074e70f06>] bcsp_recv+0x1c3/0x540  
drivers/bluetooth/hci_bcsp.c:685
     [<00000000edf8c323>] hci_uart_tty_receive+0xba/0x200  
drivers/bluetooth/hci_ldisc.c:607
     [<000000009051651a>] tiocsti drivers/tty/tty_io.c:2195 [inline]
     [<000000009051651a>] tty_ioctl+0x81c/0xa30 drivers/tty/tty_io.c:2571
     [<000000005695f2c9>] vfs_ioctl fs/ioctl.c:46 [inline]
     [<000000005695f2c9>] file_ioctl fs/ioctl.c:509 [inline]
     [<000000005695f2c9>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
     [<00000000be82d55d>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
     [<00000000d19fa7dc>] __do_sys_ioctl fs/ioctl.c:720 [inline]
     [<00000000d19fa7dc>] __se_sys_ioctl fs/ioctl.c:718 [inline]
     [<00000000d19fa7dc>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
     [<0000000051eaf016>] do_syscall_64+0x76/0x1a0  
arch/x86/entry/common.c:301
     [<000000000b0b6970>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888123ccbc00 (size 224):
   comm "syz-executor717", pid 7249, jiffies 4295003727 (age 33.320s)
   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:
     [<00000000600479ed>] kmemleak_alloc_recursive  
include/linux/kmemleak.h:55 [inline]
     [<00000000600479ed>] slab_post_alloc_hook mm/slab.h:439 [inline]
     [<00000000600479ed>] slab_alloc_node mm/slab.c:3269 [inline]
     [<00000000600479ed>] kmem_cache_alloc_node+0x153/0x2a0 mm/slab.c:3579
     [<0000000059f3ba6b>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198
     [<0000000074e70f06>] alloc_skb include/linux/skbuff.h:1058 [inline]
     [<0000000074e70f06>] bt_skb_alloc include/net/bluetooth/bluetooth.h:339  
[inline]
     [<0000000074e70f06>] bcsp_recv+0x1c3/0x540  
drivers/bluetooth/hci_bcsp.c:685
     [<00000000edf8c323>] hci_uart_tty_receive+0xba/0x200  
drivers/bluetooth/hci_ldisc.c:607
     [<000000009051651a>] tiocsti drivers/tty/tty_io.c:2195 [inline]
     [<000000009051651a>] tty_ioctl+0x81c/0xa30 drivers/tty/tty_io.c:2571
     [<000000005695f2c9>] vfs_ioctl fs/ioctl.c:46 [inline]
     [<000000005695f2c9>] file_ioctl fs/ioctl.c:509 [inline]
     [<000000005695f2c9>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
     [<00000000be82d55d>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
     [<00000000d19fa7dc>] __do_sys_ioctl fs/ioctl.c:720 [inline]
     [<00000000d19fa7dc>] __se_sys_ioctl fs/ioctl.c:718 [inline]
     [<00000000d19fa7dc>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
     [<0000000051eaf016>] do_syscall_64+0x76/0x1a0  
arch/x86/entry/common.c:301
     [<000000000b0b6970>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff888123ccbc00 (size 224):
   comm "syz-executor717", pid 7249, jiffies 4295003727 (age 33.370s)
   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:
     [<00000000600479ed>] kmemleak_alloc_recursive  
include/linux/kmemleak.h:55 [inline]
     [<00000000600479ed>] slab_post_alloc_hook mm/slab.h:439 [inline]
     [<00000000600479ed>] slab_alloc_node mm/slab.c:3269 [inline]
     [<00000000600479ed>] kmem_cache_alloc_node+0x153/0x2a0 mm/slab.c:3579
     [<0000000059f3ba6b>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198
     [<0000000074e70f06>] alloc_skb include/linux/skbuff.h:1058 [inline]
     [<0000000074e70f06>] bt_skb_alloc include/net/bluetooth/bluetooth.h:339  
[inline]
     [<0000000074e70f06>] bcsp_recv+0x1c3/0x540  
drivers/bluetooth/hci_bcsp.c:685
     [<00000000edf8c323>] hci_uart_tty_receive+0xba/0x200  
drivers/bluetooth/hci_ldisc.c:607
     [<000000009051651a>] tiocsti drivers/tty/tty_io.c:2195 [inline]
     [<000000009051651a>] tty_ioctl+0x81c/0xa30 drivers/tty/tty_io.c:2571
     [<000000005695f2c9>] vfs_ioctl fs/ioctl.c:46 [inline]
     [<000000005695f2c9>] file_ioctl fs/ioctl.c:509 [inline]
     [<000000005695f2c9>] do_vfs_ioctl+0x62a/0x810 fs/ioctl.c:696
     [<00000000be82d55d>] ksys_ioctl+0x86/0xb0 fs/ioctl.c:713
     [<00000000d19fa7dc>] __do_sys_ioctl fs/ioctl.c:720 [inline]
     [<00000000d19fa7dc>] __se_sys_ioctl fs/ioctl.c:718 [inline]
     [<00000000d19fa7dc>] __x64_sys_ioctl+0x1e/0x30 fs/ioctl.c:718
     [<0000000051eaf016>] do_syscall_64+0x76/0x1a0  
arch/x86/entry/common.c:301
     [<000000000b0b6970>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

executing program


---
This bug is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.

syzbot will keep track of this bug report. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this bug, for details see:
https://goo.gl/tpsmEJ#testing-patches