https://github.com/torvalds/linux
Revision 9609dad263f8bea347f41fddca29353dbf8a7d37 authored by Young Xiao on 29 May 2019, 08:10:59 UTC, committed by David S. Miller on 30 May 2019, 19:32:47 UTC
The TCP option parsing routines in tcp_parse_options function could
read one byte out of the buffer of the TCP options.
1 while (length > 0) {
2 int opcode = *ptr++;
3 int opsize;
4
5 switch (opcode) {
6 case TCPOPT_EOL:
7 return;
8 case TCPOPT_NOP: /* Ref: RFC 793 section 3.1 */
9 length--;
10 continue;
11 default:
12 opsize = *ptr++; //out of bound access
If length = 1, then there is an access in line2.
And another access is occurred in line 12.
This would lead to out-of-bound access.
Therefore, in the patch we check that the available data length is
larger enough to pase both TCP option code and size.
Signed-off-by: Young Xiao <92siuyang@gmail.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent 62851d7
Tip revision: 9609dad263f8bea347f41fddca29353dbf8a7d37 authored by Young Xiao on 29 May 2019, 08:10:59 UTC
ipv4: tcp_input: fix stack out of bounds when parsing TCP options.
ipv4: tcp_input: fix stack out of bounds when parsing TCP options.
Tip revision: 9609dad
| File | Mode | Size |
|---|---|---|
| 9p | ||
| adfs | ||
| affs | ||
| afs | ||
| autofs | ||
| befs | ||
| bfs | ||
| btrfs | ||
| cachefiles | ||
| ceph | ||
| cifs | ||
| coda | ||
| configfs | ||
| cramfs | ||
| crypto | ||
| debugfs | ||
| devpts | ||
| dlm | ||
| ecryptfs | ||
| efivarfs | ||
| efs | ||
| exportfs | ||
| ext2 | ||
| ext4 | ||
| f2fs | ||
| fat | ||
| freevxfs | ||
| fscache | ||
| fuse | ||
| gfs2 | ||
| hfs | ||
| hfsplus | ||
| hostfs | ||
| hpfs | ||
| hugetlbfs | ||
| isofs | ||
| jbd2 | ||
| jffs2 | ||
| jfs | ||
| kernfs | ||
| lockd | ||
| minix | ||
| nfs | ||
| nfs_common | ||
| nfsd | ||
| nilfs2 | ||
| nls | ||
| notify | ||
| ntfs | ||
| ocfs2 | ||
| omfs | ||
| openpromfs | ||
| orangefs | ||
| overlayfs | ||
| proc | ||
| pstore | ||
| qnx4 | ||
| qnx6 | ||
| quota | ||
| ramfs | ||
| reiserfs | ||
| romfs | ||
| squashfs | ||
| sysfs | ||
| sysv | ||
| tracefs | ||
| ubifs | ||
| udf | ||
| ufs | ||
| unicode | ||
| xfs | ||
| Kconfig | -rw-r--r-- | 7.6 KB |
| Kconfig.binfmt | -rw-r--r-- | 7.2 KB |
| Makefile | -rw-r--r-- | 4.3 KB |
| aio.c | -rw-r--r-- | 56.1 KB |
| anon_inodes.c | -rw-r--r-- | 4.5 KB |
| attr.c | -rw-r--r-- | 9.7 KB |
| bad_inode.c | -rw-r--r-- | 5.3 KB |
| binfmt_aout.c | -rw-r--r-- | 8.3 KB |
| binfmt_elf.c | -rw-r--r-- | 63.8 KB |
| binfmt_elf_fdpic.c | -rw-r--r-- | 47.3 KB |
| binfmt_em86.c | -rw-r--r-- | 2.8 KB |
| binfmt_flat.c | -rw-r--r-- | 27.7 KB |
| binfmt_misc.c | -rw-r--r-- | 18.4 KB |
| binfmt_script.c | -rw-r--r-- | 4.4 KB |
| block_dev.c | -rw-r--r-- | 54.7 KB |
| buffer.c | -rw-r--r-- | 90.3 KB |
| char_dev.c | -rw-r--r-- | 16.5 KB |
| compat.c | -rw-r--r-- | 3.4 KB |
| compat_binfmt_elf.c | -rw-r--r-- | 3.4 KB |
| compat_ioctl.c | -rw-r--r-- | 31.0 KB |
| coredump.c | -rw-r--r-- | 21.2 KB |
| d_path.c | -rw-r--r-- | 11.2 KB |
| dax.c | -rw-r--r-- | 45.9 KB |
| dcache.c | -rw-r--r-- | 82.4 KB |
| dcookies.c | -rw-r--r-- | 7.1 KB |
| direct-io.c | -rw-r--r-- | 41.0 KB |
| drop_caches.c | -rw-r--r-- | 1.8 KB |
| eventfd.c | -rw-r--r-- | 11.1 KB |
| eventpoll.c | -rw-r--r-- | 64.8 KB |
| exec.c | -rw-r--r-- | 46.9 KB |
| fcntl.c | -rw-r--r-- | 23.3 KB |
| fhandle.c | -rw-r--r-- | 6.8 KB |
| file.c | -rw-r--r-- | 24.2 KB |
| file_table.c | -rw-r--r-- | 10.2 KB |
| filesystems.c | -rw-r--r-- | 6.4 KB |
| fs-writeback.c | -rw-r--r-- | 71.7 KB |
| fs_context.c | -rw-r--r-- | 18.7 KB |
| fs_parser.c | -rw-r--r-- | 10.9 KB |
| fs_pin.c | -rw-r--r-- | 2.0 KB |
| fs_struct.c | -rw-r--r-- | 3.3 KB |
| fs_types.c | -rw-r--r-- | 2.5 KB |
| fsopen.c | -rw-r--r-- | 11.3 KB |
| inode.c | -rw-r--r-- | 56.8 KB |
| internal.h | -rw-r--r-- | 5.4 KB |
| io_uring.c | -rw-r--r-- | 75.7 KB |
| ioctl.c | -rw-r--r-- | 17.7 KB |
| iomap.c | -rw-r--r-- | 54.8 KB |
| libfs.c | -rw-r--r-- | 32.4 KB |
| locks.c | -rw-r--r-- | 77.2 KB |
| mbcache.c | -rw-r--r-- | 12.0 KB |
| mount.h | -rw-r--r-- | 3.9 KB |
| mpage.c | -rw-r--r-- | 21.1 KB |
| namei.c | -rw-r--r-- | 122.9 KB |
| namespace.c | -rw-r--r-- | 96.2 KB |
| no-block.c | -rw-r--r-- | 688 bytes |
| nsfs.c | -rw-r--r-- | 6.1 KB |
| open.c | -rw-r--r-- | 29.3 KB |
| pipe.c | -rw-r--r-- | 27.6 KB |
| pnode.c | -rw-r--r-- | 15.1 KB |
| pnode.h | -rw-r--r-- | 1.9 KB |
| posix_acl.c | -rw-r--r-- | 21.5 KB |
| proc_namespace.c | -rw-r--r-- | 7.8 KB |
| read_write.c | -rw-r--r-- | 50.0 KB |
| readdir.c | -rw-r--r-- | 11.3 KB |
| select.c | -rw-r--r-- | 35.3 KB |
| seq_file.c | -rw-r--r-- | 24.4 KB |
| signalfd.c | -rw-r--r-- | 9.0 KB |
| splice.c | -rw-r--r-- | 40.1 KB |
| stack.c | -rw-r--r-- | 2.5 KB |
| stat.c | -rw-r--r-- | 19.4 KB |
| statfs.c | -rw-r--r-- | 9.9 KB |
| super.c | -rw-r--r-- | 46.3 KB |
| sync.c | -rw-r--r-- | 10.4 KB |
| timerfd.c | -rw-r--r-- | 13.4 KB |
| userfaultfd.c | -rw-r--r-- | 50.9 KB |
| utimes.c | -rw-r--r-- | 7.4 KB |
| xattr.c | -rw-r--r-- | 23.5 KB |
Computing file changes ...
