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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-26 06:53:50 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-26 06:53:50 +0100 |
| commit | a560a5672826fc1e057068bda93b3d4c98d037a2 (patch) | |
| tree | 7bc3774f7ec5fa2346a86b7158f975b9a762697a /arch/x86/mm/maccess.c | |
| parent | e89fbb5bc21a10a0de2bb878d4df09f538dc523b (diff) | |
| parent | d206a76d7d2726f3b096037f2079ce0bd3ba329b (diff) | |
| download | linux-a560a5672826fc1e057068bda93b3d4c98d037a2.tar.gz linux-a560a5672826fc1e057068bda93b3d4c98d037a2.tar.bz2 linux-a560a5672826fc1e057068bda93b3d4c98d037a2.zip | |
Merge v6.8-rc6 into usb-next
We need it here for the USB fixes, and it resolves a merge conflict as
reported in linux-next in drivers/usb/roles/class.c
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86/mm/maccess.c')
| -rw-r--r-- | arch/x86/mm/maccess.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/mm/maccess.c b/arch/x86/mm/maccess.c index 6993f026adec..42115ac079cf 100644 --- a/arch/x86/mm/maccess.c +++ b/arch/x86/mm/maccess.c @@ -3,6 +3,8 @@ #include <linux/uaccess.h> #include <linux/kernel.h> +#include <asm/vsyscall.h> + #ifdef CONFIG_X86_64 bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) { @@ -16,6 +18,14 @@ bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size) return false; /* + * Reading from the vsyscall page may cause an unhandled fault in + * certain cases. Though it is at an address above TASK_SIZE_MAX, it is + * usually considered as a user space address. + */ + if (is_vsyscall_vaddr(vaddr)) + return false; + + /* * Allow everything during early boot before 'x86_virt_bits' * is initialized. Needed for instruction decoding in early * exception handlers. |