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| author | Colin Ian King <colin.king@canonical.com> | 2020-10-16 16:33:51 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-10-16 17:28:45 +0200 |
| commit | a48faebe65b0db55a73b9220c3d919eee849bb79 (patch) | |
| tree | 0cfe505940239ea23f57eca478376dd0ec3b9f72 /drivers | |
| parent | nbd: make the config put is called before the notifying the waiter (diff) | |
| download | linux-a48faebe65b0db55a73b9220c3d919eee849bb79.tar.xz linux-a48faebe65b0db55a73b9220c3d919eee849bb79.zip | |
lightnvm: fix out-of-bounds write to array devices->info[]
There is an off-by-one array check that can lead to a out-of-bounds
write to devices->info[i]. Fix this by checking by using >= rather
than > for the size check. Also replace hard-coded array size limit
with ARRAY_SIZE on the array.
Addresses-Coverity: ("Out-of-bounds write")
Fixes: cd9e9808d18f ("lightnvm: Support for Open-Channel SSDs")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/lightnvm/core.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/lightnvm/core.c b/drivers/lightnvm/core.c index fe78bf0fdce5..c1bcac71008c 100644 --- a/drivers/lightnvm/core.c +++ b/drivers/lightnvm/core.c @@ -1311,8 +1311,9 @@ static long nvm_ioctl_get_devices(struct file *file, void __user *arg) strlcpy(info->bmname, "gennvm", sizeof(info->bmname)); i++; - if (i > 31) { - pr_err("max 31 devices can be reported.\n"); + if (i >= ARRAY_SIZE(devices->info)) { + pr_err("max %zd devices can be reported.\n", + ARRAY_SIZE(devices->info)); break; } } |