linux-kernel - Re: [syzbot] [ntfs3?] WARNING in indx_insert_into

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Message-ID: <0000000000006b25a7060ae67eae@google.com>
Date:   Fri, 24 Nov 2023 06:08:59 -0800
From:   syzbot <syzbot+c5b339d16ffa61fd512d@...kaller.appspotmail.com>
To:     linux-kernel@...r.kernel.org
Subject: Re: [syzbot] [ntfs3?] WARNING in indx_insert_into_buffer

For archival purposes, forwarding an incoming command email to
linux-kernel@...r.kernel.org.

***

Subject: [ntfs3?] WARNING in indx_insert_into_buffer
Author: eadavis@...com

please test WARNING in indx_insert_into_buffer

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 037266a5f723

diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
index cf92b2433f7a..92448d922aec 100644
--- a/fs/ntfs3/index.c
+++ b/fs/ntfs3/index.c
@@ -1909,6 +1909,10 @@ indx_insert_into_buffer(struct ntfs_index *indx, struct ntfs_inode *ni,
 		 * Undo critical operations.
 		 */
 		indx_mark_free(indx, ni, new_vbn >> indx->idx2vbn_bits);
+		printk("h1: %s\n", (char *)hdr1);
+		printk("h1s: %s\n", (char *)hdr1_saved);
+		if (!level && err == -ENOMEM)
+			goto out;
 		memcpy(hdr1, hdr1_saved, used1);
 		indx_write(indx, ni, n1, 0);
 	}