For the first backtrace:
(gdb) print *cur
Cannot access memory at address 0xfffffffc
(gdb) print *ctx
$1 = {debug = 0, debug_fixed = 0, ctrl_pipe = {8, 9}, usb_devs = {prev =
0x9089010, next = 0x90899c0}, usb_devs_lock = {__data = {__lock = 0, __count =
0, __owner = 0, __kind = 0, __nusers = 0, {__spins = 0, __list = {__next =
0x0}}},
__size = '\000' <repeats 23 times>, __align = 0}, open_devs = {prev =
0x908916c, next = 0x908916c}, open_devs_lock = {__data = {__lock = 0, __count =
0, __owner = 0, __kind = 0, __nusers = 0, {__spins = 0, __list = {__next =
0x0}}},
__size = '\000' <repeats 23 times>, __align = 0}, flying_transfers = {prev
= 0xb660046c, next = 0xb660046c}, flying_transfers_lock = {__data = {__lock =
1, __count = 0, __owner = 899, __kind = 0, __nusers = 1, {__spins = 0,
__list = {__next = 0x0}}}, __size =
"\001\000\000\000\000\000\000\000\203\003\000\000\000\000\000\000\001\000\000\000\000\000\000",
__align = 1}, pollfds = {prev = 0x90899f8, next = 0x9088630}, pollfds_lock =
{__data = {
__lock = 0, __count = 0, __owner = 0, __kind = 0, __nusers = 0, {__spins
= 0, __list = {__next = 0x0}}}, __size = '\000' <repeats 23 times>, __align =
0}, pollfd_modify = 0, pollfd_modify_lock = {__data = {__lock = 0, __count = 0,
__owner = 0, __kind = 0, __nusers = 0, {__spins = 0, __list = {__next =
0x0}}}, __size = '\000' <repeats 23 times>, __align = 0}, fd_added_cb = 0,
fd_removed_cb = 0, fd_cb_user_data = 0x0, events_lock = {__data = {__lock = 0,
__count = 0, __owner = 0, __kind = 1, __nusers = 0, {__spins = 0, __list
= {__next = 0x0}}}, __size = '\000' <repeats 12 times>,
"\001\000\000\000\000\000\000\000\000\000\000", __align = 0},
event_handler_active = 0,
event_waiters_lock = {__data = {__lock = 0, __count = 0, __owner = 0, __kind
= 0, __nusers = 0, {__spins = 0, __list = {__next = 0x0}}}, __size = '\000'
<repeats 23 times>, __align = 0}, event_waiters_cond = {__data = {__lock = 0,
__futex = 0, __total_seq = 0, __wakeup_seq = 0, __woken_seq = 0, __mutex
= 0x0, __nwaiters = 0, __broadcast_seq = 0}, __size = '\000' <repeats 47
times>, __align = 0}, timerfd = 10}
(gdb) print ctx->flying_transfers
$2 = {prev = 0xb660046c, next = 0xb660046c}
For the second backtrace:
(gdb) print *cur
Cannot access memory at address 0xfffffffc
(gdb) print *ctx
$1 = {debug = 0, debug_fixed = 0, ctrl_pipe = {8, 9}, usb_devs = {prev =
0x8b64010, next = 0x8b649c0}, usb_devs_lock = {__data = {__lock = 0, __count =
0, __owner = 0, __kind = 0, __nusers = 0, {__spins = 0, __list = {__next =
0x0}}},
__size = '\000' <repeats 23 times>, __align = 0}, open_devs = {prev =
0x8b6416c, next = 0x8b6416c}, open_devs_lock = {__data = {__lock = 0, __count =
0, __owner = 0, __kind = 0, __nusers = 0, {__spins = 0, __list = {__next =
0x0}}},
__size = '\000' <repeats 23 times>, __align = 0}, flying_transfers = {prev
= 0x8b64a0c, next = 0x8b64a0c}, flying_transfers_lock = {__data = {__lock = 1,
__count = 0, __owner = 1913, __kind = 0, __nusers = 1, {__spins = 0, __list = {
__next = 0x0}}}, __size =
"\001\000\000\000\000\000\000\000y\a\000\000\000\000\000\000\001\000\000\000\000\000\000",
__align = 1}, pollfds = {prev = 0x8b649f8, next = 0x8b63630}, pollfds_lock =
{__data = {__lock = 0,
__count = 0, __owner = 0, __kind = 0, __nusers = 0, {__spins = 0, __list
= {__next = 0x0}}}, __size = '\000' <repeats 23 times>, __align = 0},
pollfd_modify = 0, pollfd_modify_lock = {__data = {__lock = 0, __count = 0,
__owner = 0, __kind = 0, __nusers = 0, {__spins = 0, __list = {__next =
0x0}}}, __size = '\000' <repeats 23 times>, __align = 0}, fd_added_cb = 0,
fd_removed_cb = 0, fd_cb_user_data = 0x0, events_lock = {__data = {__lock = 0,
__count = 0, __owner = 0, __kind = 1, __nusers = 0, {__spins = 0, __list
= {__next = 0x0}}}, __size = '\000' <repeats 12 times>,
"\001\000\000\000\000\000\000\000\000\000\000", __align = 0},
event_handler_active = 0,
event_waiters_lock = {__data = {__lock = 0, __count = 0, __owner = 0, __kind
= 0, __nusers = 0, {__spins = 0, __list = {__next = 0x0}}}, __size = '\000'
<repeats 23 times>, __align = 0}, event_waiters_cond = {__data = {__lock = 0,
__futex = 0, __total_seq = 0, __wakeup_seq = 0, __woken_seq = 0, __mutex
= 0x0, __nwaiters = 0, __broadcast_seq = 0}, __size = '\000' <repeats 47
times>, __align = 0}, timerfd = 10}
(gdb) print ctx->flying_transfers
$2 = {prev = 0x8b64a0c, next = 0x8b64a0c}
=========
Regards
Sebastian
=========
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