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| author | Ingo Molnar <mingo@kernel.org> | 2016-05-07 07:00:07 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-05-07 07:00:07 +0200 |
| commit | 35dc9ec1076b79c31bf7ed538af008b7f23bb14d (patch) | |
| tree | f90affdd5dc45f47f8d5d84ea34c71e5e521e7a1 /include/rdma/ib.h | |
| parent | 0ec7ae928a9c19c2b7b8054507d5694a2597065e (diff) | |
| parent | 07837831047fb72856d1f61a726a4094397facd8 (diff) | |
| download | linux-35dc9ec1076b79c31bf7ed538af008b7f23bb14d.tar.gz linux-35dc9ec1076b79c31bf7ed538af008b7f23bb14d.tar.bz2 linux-35dc9ec1076b79c31bf7ed538af008b7f23bb14d.zip | |
Merge branch 'linus' into efi/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/rdma/ib.h')
| -rw-r--r-- | include/rdma/ib.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/rdma/ib.h b/include/rdma/ib.h index cf8f9e700e48..a6b93706b0fc 100644 --- a/include/rdma/ib.h +++ b/include/rdma/ib.h @@ -34,6 +34,7 @@ #define _RDMA_IB_H #include <linux/types.h> +#include <linux/sched.h> struct ib_addr { union { @@ -86,4 +87,19 @@ struct sockaddr_ib { __u64 sib_scope_id; }; +/* + * The IB interfaces that use write() as bi-directional ioctl() are + * fundamentally unsafe, since there are lots of ways to trigger "write()" + * calls from various contexts with elevated privileges. That includes the + * traditional suid executable error message writes, but also various kernel + * interfaces that can write to file descriptors. + * + * This function provides protection for the legacy API by restricting the + * calling context. + */ +static inline bool ib_safe_file_access(struct file *filp) +{ + return filp->f_cred == current_cred() && segment_eq(get_fs(), USER_DS); +} + #endif /* _RDMA_IB_H */ |