From d2db60df1e7eb39cf0f378dfc4dd8813666d46ef Mon Sep 17 00:00:00 2001 From: Eric Sandeen Date: Thu, 11 Aug 2011 09:51:46 -0500 Subject: [PATCH] ext3: Properly count journal credits for long symlinks Commit ae54870a1dc9 ("ext3: Fix lock inversion in ext3_symlink()") recalculated the number of credits needed for a long symlink, in the process of splitting it into two transactions. However, the first credit calculation under-counted because if selinux is enabled, credits are needed to create the selinux xattr as well. Overrunning the reservation will result in an OOPS in journal_dirty_metadata() due to this assert: J_ASSERT_JH(jh, handle->h_buffer_credits > 0); Fix this by increasing the reservation size. Signed-off-by: Eric Sandeen Reviewed-by: Jan Kara Acked-by: "Theodore Ts'o" Cc: stable@kernel.org Signed-off-by: Linus Torvalds --- fs/ext3/namei.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c index 6e18a0b..5571708 100644 --- a/fs/ext3/namei.c +++ b/fs/ext3/namei.c @@ -2209,9 +2209,11 @@ static int ext3_symlink (struct inode * dir, /* * For non-fast symlinks, we just allocate inode and put it on * orphan list in the first transaction => we need bitmap, - * group descriptor, sb, inode block, quota blocks. + * group descriptor, sb, inode block, quota blocks, and + * possibly selinux xattr blocks. */ - credits = 4 + EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb); + credits = 4 + EXT3_MAXQUOTAS_INIT_BLOCKS(dir->i_sb) + + EXT3_XATTR_TRANS_BLOCKS; } else { /* * Fast symlink. We have to add entry to directory -- 2.7.4