Hi Andrei, * Emeltchenko Andrei <Andrei.Emeltchenko.news@xxxxxxxxx> [2011-01-24 10:53:24 +0200]: > From: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx> > > Crash can happen when tasklet handling connect/disconnect requests > preempts socket accept. Can be reproduced with "l2test -r" on one > side and several "l2test -c -b 1000 -i hci0 -P 10 <bdaddr>" on the > other side. > > disable taskets in socket accept and change lock_sock and release_sock > to bh_lock_sock and bh_unlock_sock since we have to use spinlocks and > there is no need to mark sock as owned by user. > > ... > [ 3555.897247] Unable to handle kernel NULL pointer dereference at virtual > address 000000bc > [ 3555.915039] pgd = cab9c000 > [ 3555.917785] [000000bc] *pgd=8bf3d031, *pte=00000000, *ppte=00000000 > [ 3555.928314] Internal error: Oops: 17 [#1] PREEMPT > [ 3555.999786] CPU: 0 Not tainted (2.6.32.21-13874-g67918ef #65) > ... > [ 3556.005981] PC is at bt_accept_unlink+0x20/0x58 [bluetooth] > [ 3556.011627] LR is at bt_accept_dequeue+0x3c/0xe8 [bluetooth] > ... > [ 3556.161285] [<bf0007fc>] (bt_accept_unlink+0x20/0x58 [bluetooth]) from > [<bf000870>] (bt_accept_dequeue+0x3c/0xe8 [bluetooth]) > [ 3556.172729] [<bf000870>] (bt_accept_dequeue+0x3c/0xe8 [bluetooth]) from > [<bf324df8>] (l2cap_sock_accept+0x100/0x15c [l2cap]) > [ 3556.184082] [<bf324df8>] (l2cap_sock_accept+0x100/0x15c [l2cap]) from > [<c026a0a8>] (sys_accept4+0x120/0x1e0) > [ 3556.193969] [<c026a0a8>] (sys_accept4+0x120/0x1e0) from [<c002c9a0>] > (ret_fast_syscall+0x0/0x2c) > [ 3556.202819] Code: e5813000 e5901164 e580c160 e580c15c (e1d13bbc) > ... > > Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx> > --- > net/bluetooth/af_bluetooth.c | 13 +++++++++---- > 1 files changed, 9 insertions(+), 4 deletions(-) Patch is applied now. Thanks. -- Gustavo F. Padovan http://profusion.mobi -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
