diff options
| author | Nikita Zhandarovich <n.zhandarovich@fintech.ru> | 2025-01-15 08:42:20 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-02-08 09:57:25 +0100 |
| commit | d08f4074f9c69f7e95502587eb1b258a965ba7f0 (patch) | |
| tree | dd61bead86a54ba0143927134728c4b31e768abf | |
| parent | a0753466f01c3645b85e7186048c426de2ec2fca (diff) | |
net/rose: prevent integer overflows in rose_setsockopt()
[ Upstream commit d640627663bfe7d8963c7615316d7d4ef60f3b0b ]
In case of possible unpredictably large arguments passed to
rose_setsockopt() and multiplied by extra values on top of that,
integer overflows may occur.
Do the safest minimum and fix these issues by checking the
contents of 'opt' and returning -EINVAL if they are too large. Also,
switch to unsigned int and remove useless check for negative 'opt'
in ROSE_IDLE case.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
Link: https://patch.msgid.link/20250115164220.19954-1-n.zhandarovich@fintech.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/rose/af_rose.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c index 59050caab65c..72c65d938a15 100644 --- a/net/rose/af_rose.c +++ b/net/rose/af_rose.c @@ -397,15 +397,15 @@ static int rose_setsockopt(struct socket *sock, int level, int optname, { struct sock *sk = sock->sk; struct rose_sock *rose = rose_sk(sk); - int opt; + unsigned int opt; if (level != SOL_ROSE) return -ENOPROTOOPT; - if (optlen < sizeof(int)) + if (optlen < sizeof(unsigned int)) return -EINVAL; - if (copy_from_sockptr(&opt, optval, sizeof(int))) + if (copy_from_sockptr(&opt, optval, sizeof(unsigned int))) return -EFAULT; switch (optname) { @@ -414,31 +414,31 @@ static int rose_setsockopt(struct socket *sock, int level, int optname, return 0; case ROSE_T1: - if (opt < 1) + if (opt < 1 || opt > UINT_MAX / HZ) return -EINVAL; rose->t1 = opt * HZ; return 0; case ROSE_T2: - if (opt < 1) + if (opt < 1 || opt > UINT_MAX / HZ) return -EINVAL; rose->t2 = opt * HZ; return 0; case ROSE_T3: - if (opt < 1) + if (opt < 1 || opt > UINT_MAX / HZ) return -EINVAL; rose->t3 = opt * HZ; return 0; case ROSE_HOLDBACK: - if (opt < 1) + if (opt < 1 || opt > UINT_MAX / HZ) return -EINVAL; rose->hb = opt * HZ; return 0; case ROSE_IDLE: - if (opt < 0) + if (opt > UINT_MAX / (60 * HZ)) return -EINVAL; rose->idle = opt * 60 * HZ; return 0; |