From: Konstantin Komarov almaz.alexandrovich@paragon-software.com
[ Upstream commit dcc852e509a4cba0ac6ac734077cef260e4e0fe6 ]
Signed-off-by: Konstantin Komarov almaz.alexandrovich@paragon-software.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ntfs3/super.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index 18a8bc73b8e2d..98545060580ac 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -838,7 +838,7 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, struct ntfs_sb_info *sbi = sb->s_fs_info; int err; u32 mb, gb, boot_sector_size, sct_per_clst, record_size; - u64 sectors, clusters, mlcn, mlcn2; + u64 sectors, clusters, mlcn, mlcn2, dev_size0; struct NTFS_BOOT *boot; struct buffer_head *bh; struct MFT_REC *rec; @@ -847,6 +847,9 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, u32 boot_off = 0; const char *hint = "Primary boot";
+ /* Save original dev_size. Used with alternative boot. */ + dev_size0 = dev_size; + sbi->volume.blocks = dev_size >> PAGE_SHIFT;
bh = ntfs_bread(sb, 0); @@ -1079,9 +1082,9 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, }
out: - if (err == -EINVAL && !bh->b_blocknr && dev_size > PAGE_SHIFT) { + if (err == -EINVAL && !bh->b_blocknr && dev_size0 > PAGE_SHIFT) { u32 block_size = min_t(u32, sector_size, PAGE_SIZE); - u64 lbo = dev_size - sizeof(*boot); + u64 lbo = dev_size0 - sizeof(*boot);
/* * Try alternative boot (last sector) @@ -1095,6 +1098,7 @@ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,
boot_off = lbo & (block_size - 1); hint = "Alternative boot"; + dev_size = dev_size0; /* restore original size. */ goto check_boot; } brelse(bh);