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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-12-28 16:12:23 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-12-28 16:12:23 -0800 |
| commit | 8735c7c84d1bc5c3e481c02b6b6163bdefe4132f (patch) | |
| tree | 0c2f39cf5a778ad0aa318ab2e8e9cf2e85e00243 | |
| parent | 505e701c0b2cfa9e34811020829759b7663a604c (diff) | |
| parent | d10c77873ba1e9e6b91905018e29e196fd5f863d (diff) | |
| download | linux-8735c7c84d1bc5c3e481c02b6b6163bdefe4132f.tar.gz | |
Merge tag '6.7rc7-smb3-srv-fix' of git://git.samba.org/ksmbd
Pull ksmbd server fix from Steve French:
- address possible slab out of bounds in parsing of open requests
* tag '6.7rc7-smb3-srv-fix' of git://git.samba.org/ksmbd:
ksmbd: fix slab-out-of-bounds in smb_strndup_from_utf16()
| -rw-r--r-- | fs/smb/server/smb2misc.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/fs/smb/server/smb2misc.c b/fs/smb/server/smb2misc.c index 23bd3d1209dfa5..03dded29a98042 100644 --- a/fs/smb/server/smb2misc.c +++ b/fs/smb/server/smb2misc.c @@ -106,16 +106,25 @@ static int smb2_get_data_area_len(unsigned int *off, unsigned int *len, break; case SMB2_CREATE: { + unsigned short int name_off = + le16_to_cpu(((struct smb2_create_req *)hdr)->NameOffset); + unsigned short int name_len = + le16_to_cpu(((struct smb2_create_req *)hdr)->NameLength); + if (((struct smb2_create_req *)hdr)->CreateContextsLength) { *off = le32_to_cpu(((struct smb2_create_req *) hdr)->CreateContextsOffset); *len = le32_to_cpu(((struct smb2_create_req *) hdr)->CreateContextsLength); - break; + if (!name_len) + break; + + if (name_off + name_len < (u64)*off + *len) + break; } - *off = le16_to_cpu(((struct smb2_create_req *)hdr)->NameOffset); - *len = le16_to_cpu(((struct smb2_create_req *)hdr)->NameLength); + *off = name_off; + *len = name_len; break; } case SMB2_QUERY_INFO: |