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fixup: squashfs limits number of dirents to 256

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The kernel implementation BAILS if a directory header is followed by
more than a hard-coded maximum of entries (currently 256).

Signed-off-by: David Oberhollenzer <goliath@infraroot.at>
This commit is contained in:
David Oberhollenzer 2019-04-18 21:58:42 +02:00
parent 9402492c16
commit 75e169d06a
2 changed files with 4 additions and 0 deletions
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3
sqfs/meta.c
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@ -41,6 +41,9 @@ static int write_dir(meta_writer_t *dm, node_t *node)
count += 1; count += 1;
} }
if (count > SQFS_MAX_DIR_ENT)
count = SQFS_MAX_DIR_ENT;
hdr.count = htole32(count - 1); hdr.count = htole32(count - 1);
hdr.start_block = htole32(c->inode_ref >> 16); hdr.start_block = htole32(c->inode_ref >> 16);
hdr.inode_number = htole32(c->inode_num); hdr.inode_number = htole32(c->inode_num);

1
sqfs/squashfs.h
View file

@ -10,6 +10,7 @@
#define SQFS_META_BLOCK_SIZE 8192 #define SQFS_META_BLOCK_SIZE 8192
#define SQFS_DEFAULT_BLOCK_SIZE 131072 #define SQFS_DEFAULT_BLOCK_SIZE 131072
#define SQFS_DEVBLK_SIZE 4096 #define SQFS_DEVBLK_SIZE 4096
#define SQFS_MAX_DIR_ENT 256
typedef struct { typedef struct {
uint32_t magic; uint32_t magic;