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badblocks: add error checking for command-line arguments for -b and -c

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Also remove a dead assignment (the value of try is overwritten after
the continue statement).

Addresses-Coverity-Bug: 1297515
Addresses-Coverity-Bug: 1464573
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2021-02-12 11:53:23 -05:00
parent 46fcf7087b
commit 10f9b11b76
1 changed files with 13 additions and 1 deletions
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14
misc/badblocks.c
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@ -892,7 +892,6 @@ static unsigned int test_nd (int dev, blk_t last_block,
test_ptr += got * block_size;
currently_testing += got;
if (got != try) {
try = 1;
if (recover_block == ~0U)
recover_block = currently_testing -
got + blocks_at_once;
@ -1201,6 +1200,19 @@ int main (int argc, char ** argv)
exit(1);
}
}
if ((block_size <= 0) || (block_size > (1 << 24)) ||
(block_size & (block_size - 1))) {
com_err(program_name, 0, _("Invalid block size: %d\n"),
block_size);
exit(1);
}
if ((blocks_at_once <= 0) ||
(((unsigned long long) block_size * blocks_at_once) > 0xFFFFFFFF)) {
com_err(program_name, 0, _("Invalid blocks_at_once: %d\n"),
blocks_at_once);
exit(1);
}
if (optind > argc - 1)
usage();
device_name = argv[optind++];