Searched hist:aded024a (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/drivers/char/ |
| H A D | virtio_console.c | aded024a Mon Jan 21 17:20:26 CST 2013 Sjur Brændeland <sjur.brandeland@stericsson.com> virtio_console: Don't access uninitialized data.
Don't access uninitialized work-queue when removing device.
The work queue is initialized only if the device multi-queue.
So don't call cancel_work unless this is a multi-queue device.
This fixes the following panic:
Kernel panic - not syncing: BUG!
Call Trace:
62031b28: [<6026085d>] panic+0x16b/0x2d3
62031b30: [<6004ef5e>] flush_work+0x0/0x1d7
62031b60: [<602606f2>] panic+0x0/0x2d3
62031b68: [<600333b0>] memcpy+0x0/0x140
62031b80: [<6002d58a>] unblock_signals+0x0/0x84
62031ba0: [<602609c5>] printk+0x0/0xa0
62031bd8: [<60264e51>] __mutex_unlock_slowpath+0x13d/0x148
62031c10: [<6004ef5e>] flush_work+0x0/0x1d7
62031c18: [<60050234>] try_to_grab_pending+0x0/0x17e
62031c38: [<6004e984>] get_work_gcwq+0x71/0x8f
62031c48: [<60050539>] __cancel_work_timer+0x5b/0x115
62031c78: [<628acc85>] unplug_port+0x0/0x191 [virtio_console]
62031c98: [<6005061c>] cancel_work_sync+0x12/0x14
62031ca8: [<628ace96>] virtcons_remove+0x80/0x15c [virtio_console]
62031ce8: [<628191de>] virtio_dev_remove+0x1e/0x7e [virtio]
62031d08: [<601cf242>] __device_release_driver+0x75/0xe4
62031d28: [<601cf2dd>] device_release_driver+0x2c/0x40
62031d48: [<601ce0dd>] driver_unbind+0x7d/0xc6
62031d88: [<601cd5d9>] drv_attr_store+0x27/0x29
62031d98: [<60115f61>] sysfs_write_file+0x100/0x14d
62031df8: [<600b737d>] vfs_write+0xcb/0x184
62031e08: [<600b58b8>] filp_close+0x88/0x94
62031e38: [<600b7686>] sys_write+0x59/0x88
62031e88: [<6001ced1>] handle_syscall+0x5d/0x80
62031ea8: [<60030a74>] userspace+0x405/0x531
62031f08: [<600d32cc>] sys_dup+0x0/0x5e
62031f28: [<601b11d6>] strcpy+0x0/0x18
62031f38: [<600be46c>] do_execve+0x10/0x12
62031f48: [<600184c7>] run_init_process+0x43/0x45
62031fd8: [<60019a91>] new_thread_handler+0xba/0xbc
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Cc: stable@kernel.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
aded024a Mon Jan 21 17:20:26 CST 2013 Sjur Brændeland <sjur.brandeland@stericsson.com> virtio_console: Don't access uninitialized data.
Don't access uninitialized work-queue when removing device.
The work queue is initialized only if the device multi-queue.
So don't call cancel_work unless this is a multi-queue device.
This fixes the following panic:
Kernel panic - not syncing: BUG!
Call Trace:
62031b28: [<6026085d>] panic+0x16b/0x2d3
62031b30: [<6004ef5e>] flush_work+0x0/0x1d7
62031b60: [<602606f2>] panic+0x0/0x2d3
62031b68: [<600333b0>] memcpy+0x0/0x140
62031b80: [<6002d58a>] unblock_signals+0x0/0x84
62031ba0: [<602609c5>] printk+0x0/0xa0
62031bd8: [<60264e51>] __mutex_unlock_slowpath+0x13d/0x148
62031c10: [<6004ef5e>] flush_work+0x0/0x1d7
62031c18: [<60050234>] try_to_grab_pending+0x0/0x17e
62031c38: [<6004e984>] get_work_gcwq+0x71/0x8f
62031c48: [<60050539>] __cancel_work_timer+0x5b/0x115
62031c78: [<628acc85>] unplug_port+0x0/0x191 [virtio_console]
62031c98: [<6005061c>] cancel_work_sync+0x12/0x14
62031ca8: [<628ace96>] virtcons_remove+0x80/0x15c [virtio_console]
62031ce8: [<628191de>] virtio_dev_remove+0x1e/0x7e [virtio]
62031d08: [<601cf242>] __device_release_driver+0x75/0xe4
62031d28: [<601cf2dd>] device_release_driver+0x2c/0x40
62031d48: [<601ce0dd>] driver_unbind+0x7d/0xc6
62031d88: [<601cd5d9>] drv_attr_store+0x27/0x29
62031d98: [<60115f61>] sysfs_write_file+0x100/0x14d
62031df8: [<600b737d>] vfs_write+0xcb/0x184
62031e08: [<600b58b8>] filp_close+0x88/0x94
62031e38: [<600b7686>] sys_write+0x59/0x88
62031e88: [<6001ced1>] handle_syscall+0x5d/0x80
62031ea8: [<60030a74>] userspace+0x405/0x531
62031f08: [<600d32cc>] sys_dup+0x0/0x5e
62031f28: [<601b11d6>] strcpy+0x0/0x18
62031f38: [<600be46c>] do_execve+0x10/0x12
62031f48: [<600184c7>] run_init_process+0x43/0x45
62031fd8: [<60019a91>] new_thread_handler+0xba/0xbc
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Cc: stable@kernel.org
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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