Commit 556f47ac authored by David Abdurachmanov's avatar David Abdurachmanov Committed by Paul Walmsley

riscv: reject invalid syscalls below -1

Running "stress-ng --enosys 4 -t 20 -v" showed a large number of kernel oops
with "Unable to handle kernel paging request at virtual address" message. This
happens when enosys stressor starts testing random non-valid syscalls.

I forgot to redirect any syscall below -1 to sys_ni_syscall.

With the patch kernel oops messages are gone while running stress-ng enosys
stressor.
Signed-off-by: default avatarDavid Abdurachmanov <david.abdurachmanov@sifive.com>
Fixes: 5340627e ("riscv: add support for SECCOMP and SECCOMP_FILTER")
Signed-off-by: default avatarPaul Walmsley <paul.walmsley@sifive.com>
parent 4d47ce15
...@@ -246,6 +246,7 @@ check_syscall_nr: ...@@ -246,6 +246,7 @@ check_syscall_nr:
*/ */
li t1, -1 li t1, -1
beq a7, t1, ret_from_syscall_rejected beq a7, t1, ret_from_syscall_rejected
blt a7, t1, 1f
/* Call syscall */ /* Call syscall */
la s0, sys_call_table la s0, sys_call_table
slli t0, a7, RISCV_LGPTR slli t0, a7, RISCV_LGPTR
......
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