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authorJaegeuk Kim <jaegeuk@kernel.org>2019-01-25 12:05:25 -0800
committerJaegeuk Kim <jaegeuk@kernel.org>2019-02-15 20:59:45 -0800
commit11ac8ef8d8c575409dcce3bcf1dda3c9f8c7f5e9 (patch)
tree3d64d5f72e27fff19a744e1952078c38119e2c98 /fs/f2fs
parentb460866d27089ffaf915a5a3340b4d8c9f079d33 (diff)
f2fs: avoid null pointer exception in dcc_info
If dcc_info is not set yet, we can get null pointer panic. Reviewed-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/f2fs.h13
1 files changed, 10 insertions, 3 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index fe95abb05d40..8c928cd72b61 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -2161,10 +2161,17 @@ static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
get_pages(sbi, F2FS_RD_META) || get_pages(sbi, F2FS_WB_DATA) ||
get_pages(sbi, F2FS_WB_CP_DATA) ||
get_pages(sbi, F2FS_DIO_READ) ||
- get_pages(sbi, F2FS_DIO_WRITE) ||
- atomic_read(&SM_I(sbi)->dcc_info->queued_discard) ||
- atomic_read(&SM_I(sbi)->fcc_info->queued_flush))
+ get_pages(sbi, F2FS_DIO_WRITE))
return false;
+
+ if (SM_I(sbi) && SM_I(sbi)->dcc_info &&
+ atomic_read(&SM_I(sbi)->dcc_info->queued_discard))
+ return false;
+
+ if (SM_I(sbi) && SM_I(sbi)->fcc_info &&
+ atomic_read(&SM_I(sbi)->fcc_info->queued_flush))
+ return false;
+
return f2fs_time_over(sbi, type);
}