linux-dev/arch/nios2/kernel/sys_nios2.c, branch linus/masterLinux kernel development work - see feature brancheshttps://git.zx2c4.com/linux-dev/atom/arch/nios2/kernel/sys_nios2.c?h=linus%2Fmaster2021-02-19T07:01:59ZTake mmap lock in cacheflush syscall2021-02-19T07:01:59ZJann Hornjannh@google.com2021-02-19T06:59:35Zurn:sha1: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>
nios2: System calls handling2014-12-08T04:55:58ZLey Foon Tanlftan@altera.com2014-11-06T07:19:57Zurn:sha1:1000197d801329804d30094aef5dba0265204d17
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>