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author | Haimin Zhang <tcs_kernel@tencent.com> | 2022-03-08 11:20:28 +0800 |
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committer | Steffen Klassert <steffen.klassert@secunet.com> | 2022-03-10 07:39:47 +0100 |
commit | 9a564bccb78a76740ea9d75a259942df8143d02c (patch) | |
tree | af80e6330dcdb8be70d1d8e8059ad2d537780815 /fs/locks.c | |
parent | 5f147476057832b8f87461ff6da35b5d2e1c2c29 (diff) | |
download | linux-9a564bccb78a76740ea9d75a259942df8143d02c.tar.gz |
af_key: add __GFP_ZERO flag for compose_sadb_supported in function pfkey_register
Add __GFP_ZERO flag for compose_sadb_supported in function pfkey_register to initialize the buffer of supp_skb to fix a kernel-info-leak issue. 1) Function pfkey_register calls compose_sadb_supported to request a sk_buff. 2) compose_sadb_supported calls alloc_sbk to allocate a sk_buff, but it doesn't zero it. 3) If auth_len is greater 0, then compose_sadb_supported treats the memory as a struct sadb_supported and begins to initialize. But it just initializes the field sadb_supported_len and field sadb_supported_exttype without field sadb_supported_reserved. Reported-by: TCS Robot <tcs_robot@tencent.com> Signed-off-by: Haimin Zhang <tcs_kernel@tencent.com> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'fs/locks.c')
0 files changed, 0 insertions, 0 deletions