diff options
| author | Dan Carpenter <[email protected]> | 2022-01-21 14:55:05 +0300 |
|---|---|---|
| committer | Miquel Raynal <[email protected]> | 2022-01-25 10:32:07 +0100 |
| commit | 3e3765875b1b8864898603768fd5c93eeb552211 (patch) | |
| tree | cc469397df15bc29a8360eb14a716788f3935090 /net/unix/sysctl_net_unix.c | |
| parent | 4cd335dae3cf25412427938d8abbaf04d46e63b5 (diff) | |
mtd: phram: Prevent divide by zero bug in phram_setup()
The problem is that "erasesize" is a uint64_t type so it might be
non-zero but the lower 32 bits are zero so when it's truncated,
"(uint32_t)erasesize", then that value is zero. This leads to a
divide by zero bug.
Avoid the bug by delaying the divide until after we have validated
that "erasesize" is non-zero and within the uint32_t range.
Fixes: dc2b3e5cbc80 ("mtd: phram: use div_u64_rem to stop overwrite len in phram_setup")
Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: Miquel Raynal <[email protected]>
Link: https://lore.kernel.org/linux-mtd/20220121115505.GI1978@kadam
Diffstat (limited to 'net/unix/sysctl_net_unix.c')
0 files changed, 0 insertions, 0 deletions