[PATCH] ext4: fix NULL pointer dereference inprint_daily_error_info

From: Sergey Senozhatsky
Date: Wed Sep 15 2010 - 02:35:12 EST


Fix NULL pointer dereference in print_daily_error_info, when
called on unmounted fs (EXT4_SB(sb) returns NULL), by removing error
reporting timer in ext4_put_super.

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>

---

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 2614774..751997d 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -719,6 +719,7 @@ static void ext4_put_super(struct super_block *sb)
ext4_abort(sb, "Couldn't clean up the journal");
}

+ del_timer(&sbi->s_err_report);
ext4_release_system_zone(sb);
ext4_mb_release(sb);
ext4_ext_release(sb);


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