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d37f50e190
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@nokia.com> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> |
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| .. | ||
| bnep | ||
| cmtp | ||
| hidp | ||
| rfcomm | ||
| af_bluetooth.c | ||
| hci_conn.c | ||
| hci_core.c | ||
| hci_event.c | ||
| hci_sock.c | ||
| hci_sysfs.c | ||
| Kconfig | ||
| l2cap.c | ||
| lib.c | ||
| Makefile | ||
| mgmt.c | ||
| sco.c | ||