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authorAlexey Dobriyan <adobriyan@gmail.com>2020-03-05 21:17:19 +0300
committerBorislav Petkov <bp@suse.de>2021-02-05 10:37:39 +0100
commit4f63b320afdd9af406f4426b0ff1a2cdb23e5b8d (patch)
tree3099f93aeeedab9c2de5eabcf6413e13774e18fa
parentf22fecaf39c30acce701ffc3e9875020ba31f1f5 (diff)
x86/asm: Fixup TASK_SIZE_MAX comment
Comment says "by preventing anything executable" which is not true. Even PROT_NONE mapping can't be installed at (1<<47 - 4096). mmap(0x7ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = -1 ENOMEM [ bp: Fixup to the moved location in page_64_types.h. ] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Andy Lutomirski <luto@kernel.org> Link: https://lkml.kernel.org/r/20200305181719.GA5490@avx2
-rw-r--r--arch/x86/include/asm/page_64_types.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h
index 645bd1d0ee07..64297eabad63 100644
--- a/arch/x86/include/asm/page_64_types.h
+++ b/arch/x86/include/asm/page_64_types.h
@@ -66,7 +66,7 @@
* On Intel CPUs, if a SYSCALL instruction is at the highest canonical
* address, then that syscall will enter the kernel with a
* non-canonical return address, and SYSRET will explode dangerously.
- * We avoid this particular problem by preventing anything executable
+ * We avoid this particular problem by preventing anything
* from being mapped at the maximum canonical address.
*
* On AMD CPUs in the Ryzen family, there's a nasty bug in which the