ext4: no need to continue when the number of entries is 1
commit1a00a393d6upstream. Fixes:ac27a0ec11("[PATCH] ext4: initial copy of files from ext3") Reported-by: syzbot+ae688d469e36fb5138d0@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=ae688d469e36fb5138d0 Signed-off-by: Edward Adam Davis <eadavis@qq.com> Reported-and-tested-by: syzbot+ae688d469e36fb5138d0@syzkaller.appspotmail.com Link: https://patch.msgid.link/tencent_BE7AEE6C7C2D216CB8949CE8E6EE7ECC2C0A@qq.com Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Greg Kroah-Hartman
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9cdf65c6c3
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2d64e7dada
+1
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@@ -2047,7 +2047,7 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
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split = count/2;
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hash2 = map[split].hash;
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continued = hash2 == map[split - 1].hash;
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continued = split > 0 ? hash2 == map[split - 1].hash : 0;
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dxtrace(printk(KERN_INFO "Split block %lu at %x, %i/%i\n",
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(unsigned long)dx_get_block(frame->at),
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hash2, split, count-split));
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