d31638ff6c
Syzbot reports a slab out of bounds access in squashfs_readpage_block(). This is caused by an attempt to read page index 0x2000000000. This value (start_index) is stored in an integer loop variable which overflows producing a value of 0. This causes a loop which iterates over pages start_index -> end_index to iterate over 0 -> end_index, which ultimately causes an out of bounds page array access. Fix by changing variable to a loff_t, and rename to index to make it clearer it is a page index, and not a loop count. Link: https://lkml.kernel.org/r/20241020232200.837231-1-phillip@squashfs.org.uk Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk> Reported-by: "Lai, Yi" <yi1.lai@linux.intel.com> Closes: https://lore.kernel.org/all/ZwzcnCAosIPqQ9Ie@ly-workstation/ Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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| .. | ||
| block.c | ||
| cache.c | ||
| decompressor_multi_percpu.c | ||
| decompressor_multi.c | ||
| decompressor_single.c | ||
| decompressor.c | ||
| decompressor.h | ||
| dir.c | ||
| export.c | ||
| file_cache.c | ||
| file_direct.c | ||
| file.c | ||
| fragment.c | ||
| id.c | ||
| inode.c | ||
| Kconfig | ||
| lz4_wrapper.c | ||
| lzo_wrapper.c | ||
| Makefile | ||
| namei.c | ||
| page_actor.c | ||
| page_actor.h | ||
| squashfs_fs_i.h | ||
| squashfs_fs_sb.h | ||
| squashfs_fs.h | ||
| squashfs.h | ||
| super.c | ||
| symlink.c | ||
| xattr_id.c | ||
| xattr.c | ||
| xattr.h | ||
| xz_wrapper.c | ||
| zlib_wrapper.c | ||
| zstd_wrapper.c | ||