f2fs: avoid to access NULL pointer in issue_flush_thread
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=75861
Denis 2014-05-10 11:28:59 UTC reported:
"F2FS-fs (mmcblk0p28): mounting..
Unable to handle kernel NULL pointer dereference at virtual address
00000018
...
[<
c0a2f678>] (_raw_spin_lock+0x3c/0x70) from [<
c03a0330>] (issue_flush_thread+0x50/0x17c)
[<
c03a0330>] (issue_flush_thread+0x50/0x17c) from [<
c01b4064>] (kthread+0x98/0xa4)
[<
c01b4064>] (kthread+0x98/0xa4) from [<
c0108060>] (kernel_thread_exit+0x0/0x8)"
This patch assign cmd_control_info in sm_info before issue_flush_thread is being
created, so this make sure that issue flush thread will have no chance to access
invalid info in fcc.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Reviewed-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>