This series fixes some potential overflows in the ext4 code with invalid or malicious filesystems.
To assist with this and future work, it brings in overflow.h and part of limits.h from Linux. Changes in v3: - Split out into separate patches for easier review Changes in v2: - Add new patch to bring in linux/limits.h - Add new patch to bring in linux/overflow.h - Use Linux macros instead of gcc built-ins Simon Glass (10): Bring in linux/limits.h Bring in linux/overflow.h ext4: Avoid expr in declaration in ext4fs_get_bgdtable() ext4: Create a var for the number of blocks to allocate ext4: Check for overflow of block count ext4: Bail out of no_blk_pergdt() if there are no blocks ext4: Replace multiplication with an existing variable ext4: Set a max limit on block-size in ext4fs_init() ext4: Make sure there is at least one sector per block ext4: Check for overflow when allocating tables fs/ext4/ext4_write.c | 25 ++- include/limits.h | 2 + include/linux/kernel.h | 12 -- include/linux/limits.h | 21 ++ include/linux/overflow.h | 443 +++++++++++++++++++++++++++++++++++++++ 5 files changed, 487 insertions(+), 16 deletions(-) create mode 100644 include/linux/limits.h create mode 100644 include/linux/overflow.h -- 2.43.0 base-commit: c5a631df96de7421d10ee03dceed1b79db213026 branch: sec3
