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author | David S. Miller | 2018-05-21 22:01:54 +0200 |
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committer | David S. Miller | 2018-05-21 22:01:54 +0200 |
commit | 6f6e434aa267a6030477876d89444fe3a6b7a48d (patch) | |
tree | 67755c422f1e85451aa646eae21d4c6f3f389d9f /arch/x86/include/asm/pkeys.h | |
parent | vmcore: move get_vmcore_size out of __init (diff) | |
parent | Merge tag 'mips_fixes_4.17_2' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
download | kernel-qcow2-linux-6f6e434aa267a6030477876d89444fe3a6b7a48d.tar.gz kernel-qcow2-linux-6f6e434aa267a6030477876d89444fe3a6b7a48d.tar.xz kernel-qcow2-linux-6f6e434aa267a6030477876d89444fe3a6b7a48d.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
S390 bpf_jit.S is removed in net-next and had changes in 'net',
since that code isn't used any more take the removal.
TLS data structures split the TX and RX components in 'net-next',
put the new struct members from the bug fix in 'net' into the RX
part.
The 'net-next' tree had some reworking of how the ERSPAN code works in
the GRE tunneling code, overlapping with a one-line headroom
calculation fix in 'net'.
Overlapping changes in __sock_map_ctx_update_elem(), keep the bits
that read the prog members via READ_ONCE() into local variables
before using them.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/x86/include/asm/pkeys.h')
-rw-r--r-- | arch/x86/include/asm/pkeys.h | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/arch/x86/include/asm/pkeys.h b/arch/x86/include/asm/pkeys.h index a0ba1ffda0df..851c04b7a092 100644 --- a/arch/x86/include/asm/pkeys.h +++ b/arch/x86/include/asm/pkeys.h @@ -2,6 +2,8 @@ #ifndef _ASM_X86_PKEYS_H #define _ASM_X86_PKEYS_H +#define ARCH_DEFAULT_PKEY 0 + #define arch_max_pkey() (boot_cpu_has(X86_FEATURE_OSPKE) ? 16 : 1) extern int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, @@ -15,7 +17,7 @@ extern int __execute_only_pkey(struct mm_struct *mm); static inline int execute_only_pkey(struct mm_struct *mm) { if (!boot_cpu_has(X86_FEATURE_OSPKE)) - return 0; + return ARCH_DEFAULT_PKEY; return __execute_only_pkey(mm); } @@ -49,13 +51,21 @@ bool mm_pkey_is_allocated(struct mm_struct *mm, int pkey) { /* * "Allocated" pkeys are those that have been returned - * from pkey_alloc(). pkey 0 is special, and never - * returned from pkey_alloc(). + * from pkey_alloc() or pkey 0 which is allocated + * implicitly when the mm is created. */ - if (pkey <= 0) + if (pkey < 0) return false; if (pkey >= arch_max_pkey()) return false; + /* + * The exec-only pkey is set in the allocation map, but + * is not available to any of the user interfaces like + * mprotect_pkey(). + */ + if (pkey == mm->context.execute_only_pkey) + return false; + return mm_pkey_allocation_map(mm) & (1U << pkey); } |