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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-05-13 18:26:06 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-06-30 02:04:09 -0400 |
| commit | a2c841d94209f5775d354b563f4dccd76b876dc0 (patch) | |
| tree | e838a845c2ac99e84b7390a90ec18203a3df8306 /net/ipv4 | |
| parent | 43727da90ec8955f1351ad582c6bc8f1c1ab8ab8 (diff) | |
| download | linux-a2c841d94209f5775d354b563f4dccd76b876dc0.tar.gz | |
do_ip_setsockopt(): don't open-code memdup_user()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/ip_sockglue.c | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index ec4fe3d4b5c9..ecc4b4a2413e 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -934,14 +934,9 @@ static int do_ip_setsockopt(struct sock *sk, int level, err = -ENOBUFS; break; } - msf = kmalloc(optlen, GFP_KERNEL); - if (!msf) { - err = -ENOBUFS; - break; - } - err = -EFAULT; - if (copy_from_user(msf, optval, optlen)) { - kfree(msf); + msf = memdup_user(optval, optlen); + if (IS_ERR(msf)) { + err = PTR_ERR(msf); break; } /* numsrc >= (1G-4) overflow in 32 bits */ @@ -1090,14 +1085,11 @@ static int do_ip_setsockopt(struct sock *sk, int level, err = -ENOBUFS; break; } - gsf = kmalloc(optlen, GFP_KERNEL); - if (!gsf) { - err = -ENOBUFS; + gsf = memdup_user(optval, optlen); + if (IS_ERR(gsf)) { + err = PTR_ERR(gsf); break; } - err = -EFAULT; - if (copy_from_user(gsf, optval, optlen)) - goto mc_msf_out; /* numsrc >= (4G-140)/128 overflow in 32 bits */ if (gsf->gf_numsrc >= 0x1ffffff || |