AuxXxilium/linux_dsm_epyc7002
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250dbf5151
linux_dsm_epyc7002/fs/f2fs
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Chao Yu 250dbf5151 f2fs: fix to avoid race during access gc_thread pointer 
Thread A			Thread B
- f2fs_remount
 - stop_gc_thread
				- f2fs_sbi_store
   sbi->gc_thread = NULL;
				  access sbi->gc_thread->gc_*

Previously, we allocate memory for sbi->gc_thread based on background
gc thread mount option, the memory can be released if we turn off
that mount option, but still there are several places access gc_thread
pointer without considering race condition, result in NULL point
dereference.

In order to fix this issue, use sb->s_umount to exclude those operations.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2018-05-31 11:31:52 -07:00
..
acl.c posix_acl: convert posix_acl.a_refcount from atomic_t to refcount_t 2018-01-02 19:27:28 -08:00
acl.h f2fs: remove dead code f2fs_check_acl 2016-09-14 16:52:36 -07:00
checkpoint.c f2fs: clean up with is_valid_blkaddr() 2018-05-31 11:31:50 -07:00
data.c f2fs: clean up with clear_radix_tree_dirty_tag 2018-05-31 11:31:52 -07:00
debug.c f2fs: avoid stucking GC due to atomic write 2018-05-31 11:31:51 -07:00
dir.c f2fs: clean up with clear_radix_tree_dirty_tag 2018-05-31 11:31:52 -07:00
extent_cache.c f2fs: remove redundant initialization of pointer 'p' 2018-03-13 08:05:45 +09:00
f2fs.h f2fs: clean up with clear_radix_tree_dirty_tag 2018-05-31 11:31:52 -07:00
file.c f2fs: avoid stucking GC due to atomic write 2018-05-31 11:31:51 -07:00
gc.c f2fs: avoid stucking GC due to atomic write 2018-05-31 11:31:51 -07:00
gc.h f2fs: introduce sbi->gc_mode to determine the policy 2018-05-31 11:31:51 -07:00
hash.c f2fs: check entire encrypted bigname when finding a dentry 2017-05-04 11:44:35 -04:00
inline.c f2fs: clean up with clear_radix_tree_dirty_tag 2018-05-31 11:31:52 -07:00
inode.c f2fs: avoid stucking GC due to atomic write 2018-05-31 11:31:51 -07:00
Kconfig fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at 2018-01-01 12:45:37 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
namei.c f2fs: fix to initialize i_current_depth according to inode type 2018-05-31 11:31:50 -07:00
node.c f2fs: clean up with clear_radix_tree_dirty_tag 2018-05-31 11:31:52 -07:00
node.h f2fs: don't track new nat entry in nat set 2018-03-27 20:10:29 -07:00
recovery.c f2fs: clean up with is_valid_blkaddr() 2018-05-31 11:31:50 -07:00
segment.c f2fs: fix to don't trigger writeback during recovery 2018-05-31 11:31:52 -07:00
segment.h f2fs: avoid stucking GC due to atomic write 2018-05-31 11:31:51 -07:00
shrinker.c f2fs: obsolete ALLOC_NID_LIST list 2017-10-10 12:49:53 -07:00
super.c f2fs: keep migration IO order in LFS mode 2018-05-31 11:31:51 -07:00
sysfs.c f2fs: fix to avoid race during access gc_thread pointer 2018-05-31 11:31:52 -07:00
trace.c f2fs: fix potential hangtask in f2fs_trace_pid 2018-01-02 19:27:30 -08:00
trace.h f2fs: add sbi and page pointer in f2fs_io_info 2015-05-28 15:41:32 -07:00
xattr.c f2fs: correct removexattr behavior for null valued extended attribute 2018-01-22 14:56:57 -08:00
xattr.h f2fs: guard macro variables with braces 2017-04-10 19:48:10 -07:00