linux-toradex.git/arch/nios2/kernel/sys_nios2.c, branch v6.3 Linux kernel for Apalis and Colibri modules Take mmap lock in cacheflush syscall 2021-02-19T07:01:59+00:00 Jann Horn jannh@google.com 2021-02-19T06:59:35+00:00 c26958cb5a0d9053d1358258827638773f3d36ed We need to take the mmap lock around find_vma() and subsequent use of the VMA. Otherwise, we can race with concurrent operations like munmap(), which can lead to use-after-free accesses to freed VMAs. Fixes: 1000197d8013 ("nios2: System calls handling") Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com> 
We need to take the mmap lock around find_vma() and subsequent use of the
VMA. Otherwise, we can race with concurrent operations like munmap(), which
can lead to use-after-free accesses to freed VMAs.

Fixes: 1000197d8013 ("nios2: System calls handling")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
nios2: System calls handling 2014-12-08T04:55:58+00:00 Ley Foon Tan lftan@altera.com 2014-11-06T07:19:57+00:00 1000197d801329804d30094aef5dba0265204d17 This patch adds support for system calls from userspaces. It uses the asm-generic/unistd.h definitions with architecture spcific syscall. The sys_call_table is just an array defined in a C file and it contains pointers to the syscall functions. Signed-off-by: Ley Foon Tan <lftan@altera.com> 
This patch adds support for system calls from userspaces. It uses the
asm-generic/unistd.h definitions with architecture spcific syscall.
The sys_call_table is just an array defined in a C file and it contains
pointers to the syscall functions.

Signed-off-by: Ley Foon Tan <lftan@altera.com>