5.15-stable review patch. If anyone has any objections, please let me know.
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From: Huacai Chen chenhuacai@loongson.cn
commit 2fef55d8f78383c8e6d6d4c014b9597375132696 upstream.
If an NTFS file system is mounted to another system with different PAGE_SIZE from the original system, log->page_size will change in log_replay(), but log->page_{mask,bits} don't change correspondingly. This will cause a panic because "u32 bytes = log->page_size - page_off" will get a negative value in the later read_log_page().
Cc: stable@vger.kernel.org Fixes: b46acd6a6a627d876898e ("fs/ntfs3: Add NTFS journal") Signed-off-by: Huacai Chen chenhuacai@loongson.cn Signed-off-by: Konstantin Komarov almaz.alexandrovich@paragon-software.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/ntfs3/fslog.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/fs/ntfs3/fslog.c +++ b/fs/ntfs3/fslog.c @@ -3935,6 +3935,9 @@ init_log_instance: goto out; }
+ log->page_mask = log->page_size - 1; + log->page_bits = blksize_bits(log->page_size); + /* If the file size has shrunk then we won't mount it. */ if (l_size < le64_to_cpu(ra2->l_size)) { err = -EINVAL;