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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
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