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 3E973342CA9; Tue, 11 Nov 2025 01:21:16 +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=1762824076; cv=none; b=icBeZpfr9cVCvi1pMsxWMU93NC0rsS2afL9cplQlMxwJHO5ycoi28q7tnPTNQi0q/j9XF2oLFZHlceB97Pd+dc4VDhj49BVon02JyLApxXZNA9USdQax4CT9sX7uhzC37YUH0hYLl41batkPzpTJaSLVjX9Ksqv+Qu2/1OIHEaM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762824076; c=relaxed/simple; bh=9TL6bp5v3KwUkLsavePNwzxOVN0TUhm1Uv0na+YW/oc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RS3g/PnvF9XnxOmGG7xVuX4chbfaKcD6zb2Hv+0Nl5+TceOR9lSaG0RvPa2IMT37wEYm8r0WZXJmomJeppeKrO2ItQ9Uw7ns/A7Sgme6nahtHzX84xWOM4BAiCc2mnEUd0uoojR38HbRjNCshKiNUOZPflQBG0MVhSmcFTv9yJc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=zE/iOjs8; 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="zE/iOjs8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C9573C4CEF5; Tue, 11 Nov 2025 01:21:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1762824076; bh=9TL6bp5v3KwUkLsavePNwzxOVN0TUhm1Uv0na+YW/oc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zE/iOjs86r0Pqhk4GGpjnadoXmxlPGvUc4v4SJ9U5TQwlLLy9LkVB8PxanVEHrRNm HTXBXy7+0SRanouMn2IbtWHBCzi3i2XK+vlZOMZLlQBFReYb5zuD9JWF02HOhGqR52 7cgDzki3q/djmZQK2GASXfwYt69wuimy9Gn0yZjc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, wangzijie , Chao Yu , Jaegeuk Kim , Sasha Levin Subject: [PATCH 6.12 383/565] f2fs: fix infinite loop in __insert_extent_tree() Date: Tue, 11 Nov 2025 09:43:59 +0900 Message-ID: <20251111004535.486124435@linuxfoundation.org> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251111004526.816196597@linuxfoundation.org> References: <20251111004526.816196597@linuxfoundation.org> User-Agent: quilt/0.69 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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: wangzijie [ Upstream commit 23361bd54966b437e1ed3eb1a704572f4b279e58 ] When we get wrong extent info data, and look up extent_node in rb tree, it will cause infinite loop (CONFIG_F2FS_CHECK_FS=n). Avoiding this by return NULL and print some kernel messages in that case. Signed-off-by: wangzijie Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/extent_cache.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c index 2ccc868750994..fe5e91c6e910d 100644 --- a/fs/f2fs/extent_cache.c +++ b/fs/f2fs/extent_cache.c @@ -561,7 +561,13 @@ static struct extent_node *__insert_extent_tree(struct f2fs_sb_info *sbi, p = &(*p)->rb_right; leftmost = false; } else { + f2fs_err_ratelimited(sbi, "%s: corrupted extent, type: %d, " + "extent node in rb tree [%u, %u, %u], age [%llu, %llu], " + "extent node to insert [%u, %u, %u], age [%llu, %llu]", + __func__, et->type, en->ei.fofs, en->ei.blk, en->ei.len, en->ei.age, + en->ei.last_blocks, ei->fofs, ei->blk, ei->len, ei->age, ei->last_blocks); f2fs_bug_on(sbi, 1); + return NULL; } } -- 2.51.0