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Description: Prevent integer overflow in ZISO code
Author: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
Forwarded: not-needed
Last-Update: 2024-09-16
--- a/src/isofs.c
+++ b/src/isofs.c
@@ -1618,6 +1618,10 @@
};
static int isofs_real_read_zf(isofs_inode *inode, char *out_buf, size_t size, off_t offset) {
+ if( inode->zf_block_shift > 17 ) {
+ fprintf(stderr, "isofs_real_read_zf: can't handle ZF block size of 2^%d\n", inode->zf_block_shift);
+ return -EIO;
+ }
int zf_block_size = 1 << inode->zf_block_shift;
int zf_start = offset / zf_block_size;
int zf_end = (offset + size) / zf_block_size;
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