From: Luis Henriques (SUSE) <luis.henriques@xxxxxxxxx> commit dd589b0f1445e1ea1085b98edca6e4d5dedb98d0 upstream. Function ext4_wait_for_tail_page_commit() assumes that '0' is not a valid value for transaction IDs, which is incorrect. Don't assume that and invoke jbd2_log_wait_commit() if the journal had a committing transaction instead. Signed-off-by: Luis Henriques (SUSE) <luis.henriques@xxxxxxxxx> Reviewed-by: Jan Kara <jack@xxxxxxx> Link: https://patch.msgid.link/20240724161119.13448-2-luis.henriques@xxxxxxxxx Signed-off-by: Theodore Ts'o <tytso@xxxxxxx> Cc: stable@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/ext4/inode.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5545,8 +5545,9 @@ static void ext4_wait_for_tail_page_comm struct page *page; unsigned offset; journal_t *journal = EXT4_SB(inode->i_sb)->s_journal; - tid_t commit_tid = 0; + tid_t commit_tid; int ret; + bool has_transaction; offset = inode->i_size & (PAGE_SIZE - 1); /* @@ -5571,12 +5572,14 @@ static void ext4_wait_for_tail_page_comm put_page(page); if (ret != -EBUSY) return; - commit_tid = 0; + has_transaction = false; read_lock(&journal->j_state_lock); - if (journal->j_committing_transaction) + if (journal->j_committing_transaction) { commit_tid = journal->j_committing_transaction->t_tid; + has_transaction = true; + } read_unlock(&journal->j_state_lock); - if (commit_tid) + if (has_transaction) jbd2_log_wait_commit(journal, commit_tid); } } Patches currently in stable-queue which might be from luis.henriques@xxxxxxxxx are queue-4.19/ext4-fix-incorrect-tid-assumption-in-ext4_wait_for_tail_page_commit.patch queue-4.19/ext4-fix-incorrect-tid-assumption-in-__jbd2_log_wait_for_space.patch
