memory leak in bcsp_recv

From: syzbot
Date: Sat May 25 2019 - 13:41:16 EST

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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@xxxxxxxxxxxxxxxxxxxxxxxxx

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

---
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