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| Filename | Latest commit message | Latest commit date |
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ca0dec6564
[ Upstream commit 3a9d54b1947ecea8eea9a902c0b7eb58a98add8a ] Currently l2cap_chan_set_defaults() reset chan->conf_state to zero. However, there is a flag CONF_NOT_COMPLETE which is set when creating the l2cap_chan. It is suggested that the flag should be cleared when l2cap_chan is ready, but when l2cap_chan_set_defaults() is called, l2cap_chan is not yet ready. Therefore, we must set this flag as the default. Example crash call trace: __dump_stack lib/dump_stack.c:15 [inline] dump_stack+0xc4/0x118 lib/dump_stack.c:56 panic+0x1c6/0x38b kernel/panic.c:117 __warn+0x170/0x1b9 kernel/panic.c:471 warn_slowpath_fmt+0xc7/0xf8 kernel/panic.c:494 debug_print_object+0x175/0x193 lib/debugobjects.c:260 debug_object_assert_init+0x171/0x1bf lib/debugobjects.c:614 debug_timer_assert_init kernel/time/timer.c:629 [inline] debug_assert_init kernel/time/timer.c:677 [inline] del_timer+0x7c/0x179 kernel/time/timer.c:1034 try_to_grab_pending+0x81/0x2e5 kernel/workqueue.c:1230 cancel_delayed_work+0x7c/0x1c4 kernel/workqueue.c:2929 l2cap_clear_timer+0x1e/0x41 include/net/bluetooth/l2cap.h:834 l2cap_chan_del+0x2d8/0x37e net/bluetooth/l2cap_core.c:640 l2cap_chan_close+0x532/0x5d8 net/bluetooth/l2cap_core.c:756 l2cap_sock_shutdown+0x806/0x969 net/bluetooth/l2cap_sock.c:1174 l2cap_sock_release+0x64/0x14d net/bluetooth/l2cap_sock.c:1217 __sock_release+0xda/0x217 net/socket.c:580 sock_close+0x1b/0x1f net/socket.c:1039 __fput+0x322/0x55c fs/file_table.c:208 ____fput+0x17/0x19 fs/file_table.c:244 task_work_run+0x19b/0x1d3 kernel/task_work.c:115 exit_task_work include/linux/task_work.h:21 [inline] do_exit+0xe4c/0x204a kernel/exit.c:766 do_group_exit+0x291/0x291 kernel/exit.c:891 get_signal+0x749/0x1093 kernel/signal.c:2396 do_signal+0xa5/0xcdb arch/x86/kernel/signal.c:737 exit_to_usermode_loop arch/x86/entry/common.c:243 [inline] prepare_exit_to_usermode+0xed/0x235 arch/x86/entry/common.c:277 syscall_return_slowpath+0x3a7/0x3b3 arch/x86/entry/common.c:348 int_ret_from_sys_call+0x25/0xa3 Signed-off-by: Archie Pusaka <apusaka@chromium.org> Reported-by: syzbot+338f014a98367a08a114@syzkaller.appspotmail.com Reviewed-by: Alain Michaud <alainm@chromium.org> Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org> Reviewed-by: Guenter Roeck <groeck@chromium.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.