From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C9EC01922D0; Tue, 10 Sep 2024 10:23:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725963784; cv=none; b=NsQ1Q+4p2wa7xJfEfZX/B88PlQEt+20F+SFeDJtIruCUqHSRxE2X28Ru3J3bGSwpYP6Xxk73LkqwBdQlzJSyJv0jfPoIgUg7DQ2hrXGm8i51guAtoa+4KA3CzLigB5n73iymJYpto/oTRHz9Pj32jC9cT7NfNdhKoXbHdF2GK74= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725963784; c=relaxed/simple; bh=L5G1G4swjlcGrlBxZKZDrU6jDVKhSBgnVjFLdWHiNt0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=l4DfAr2tbD9HLZbnReVzt46mCgF9DykZytmzv9ThFSRC3VAVMuXIPznugzNxm730W+9H0rkmEgbfqSiBfnb366BEcQ2eEw8ghoN+AdKQpwTUi4CBLmm7o/0XMt9KW+VU7HkosgLvWeUpThcsQyTI4oRnyGBVw2+KMMkitmamtMo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=vFDNUmlP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="vFDNUmlP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50706C4CEC3; Tue, 10 Sep 2024 10:23:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1725963784; bh=L5G1G4swjlcGrlBxZKZDrU6jDVKhSBgnVjFLdWHiNt0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vFDNUmlPzGyxlChRgDDnFpAYfDrw1GBWUh26vj3iTFtVAqNlRmvHXqKELsd1L4Pki kKqSl8js7xqkxnFqNIfkQIYuaZg6K5ll4jR+MZpUQc4NQrRr/IqNaZpMY2icNAMU46 eIAmIPxawk4GnYw06A7mXGJx7u23h+rb9yLInLdQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Luis Henriques (SUSE)" , Jan Kara , Harshad Shirwadkar , Theodore Tso , Sasha Levin Subject: [PATCH 5.15 148/214] ext4: fix possible tid_t sequence overflows Date: Tue, 10 Sep 2024 11:32:50 +0200 Message-ID: <20240910092604.789144459@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240910092558.714365667@linuxfoundation.org> References: <20240910092558.714365667@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Luis Henriques (SUSE) [ Upstream commit 63469662cc45d41705f14b4648481d5d29cf5999 ] In the fast commit code there are a few places where tid_t variables are being compared without taking into account the fact that these sequence numbers may wrap. Fix this issue by using the helper functions tid_gt() and tid_geq(). Signed-off-by: Luis Henriques (SUSE) Reviewed-by: Jan Kara Reviewed-by: Harshad Shirwadkar Link: https://patch.msgid.link/20240529092030.9557-3-luis.henriques@linux.dev Signed-off-by: Theodore Ts'o Signed-off-by: Sasha Levin --- fs/ext4/fast_commit.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/ext4/fast_commit.c b/fs/ext4/fast_commit.c index e81b886d9c67..62255b3eb1b4 100644 --- a/fs/ext4/fast_commit.c +++ b/fs/ext4/fast_commit.c @@ -325,7 +325,7 @@ void ext4_fc_mark_ineligible(struct super_block *sb, int reason, handle_t *handl read_unlock(&sbi->s_journal->j_state_lock); } spin_lock(&sbi->s_fc_lock); - if (sbi->s_fc_ineligible_tid < tid) + if (tid_gt(tid, sbi->s_fc_ineligible_tid)) sbi->s_fc_ineligible_tid = tid; spin_unlock(&sbi->s_fc_lock); WARN_ON(reason >= EXT4_FC_REASON_MAX); @@ -1206,7 +1206,7 @@ int ext4_fc_commit(journal_t *journal, tid_t commit_tid) if (ret == -EALREADY) { /* There was an ongoing commit, check if we need to restart */ if (atomic_read(&sbi->s_fc_subtid) <= subtid && - commit_tid > journal->j_commit_sequence) + tid_gt(commit_tid, journal->j_commit_sequence)) goto restart_fc; ext4_fc_update_stats(sb, EXT4_FC_STATUS_SKIPPED, 0, 0); return 0; @@ -1278,7 +1278,7 @@ static void ext4_fc_cleanup(journal_t *journal, int full, tid_t tid) list_del_init(&iter->i_fc_list); ext4_clear_inode_state(&iter->vfs_inode, EXT4_STATE_FC_COMMITTING); - if (iter->i_sync_tid <= tid) + if (tid_geq(tid, iter->i_sync_tid)) ext4_fc_reset_inode(&iter->vfs_inode); /* Make sure EXT4_STATE_FC_COMMITTING bit is clear */ smp_mb(); @@ -1308,7 +1308,7 @@ static void ext4_fc_cleanup(journal_t *journal, int full, tid_t tid) list_splice_init(&sbi->s_fc_q[FC_Q_STAGING], &sbi->s_fc_q[FC_Q_MAIN]); - if (tid >= sbi->s_fc_ineligible_tid) { + if (tid_geq(tid, sbi->s_fc_ineligible_tid)) { sbi->s_fc_ineligible_tid = 0; ext4_clear_mount_flag(sb, EXT4_MF_FC_INELIGIBLE); } -- 2.43.0