Revision 9a564bccb78a76740ea9d75a259942df8143d02c authored by Haimin Zhang on 08 March 2022, 03:20:28 UTC, committed by Steffen Klassert on 10 March 2022, 06:39:47 UTC
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>
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| File | Mode | Size |
|---|---|---|
| Kconfig | -rw-r--r-- | 285 bytes |
| Makefile | -rw-r--r-- | 137 bytes |
| mdev_core.c | -rw-r--r-- | 8.7 KB |
| mdev_driver.c | -rw-r--r-- | 1.8 KB |
| mdev_private.h | -rw-r--r-- | 1.6 KB |
| mdev_sysfs.c | -rw-r--r-- | 6.6 KB |
| vfio_mdev.c | -rw-r--r-- | 3.7 KB |
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