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| author |   Andreas Schwab <schwab@suse.de> | 2020-12-21 23:52:00 +0100 |
|---|---|---|
| committer |   Palmer Dabbelt <palmerdabbelt@google.com> | 2021-01-07 18:01:34 -0800 |
| commit | cf7b2ae4d70432fa94ebba3fbaab825481ae7189 (patch) | |
| tree | d1a0f56d908ed2facbb45e6c70b2a95cd04e5781 /arch/riscv/kernel/entry.S | |
| parent | Linux 5.11-rc2 (diff) | |
| download | linux-dev-cf7b2ae4d70432fa94ebba3fbaab825481ae7189.tar.xz linux-dev-cf7b2ae4d70432fa94ebba3fbaab825481ae7189.zip | |
riscv: return -ENOSYS for syscall -1
Properly return -ENOSYS for syscall -1 instead of leaving the return value
uninitialized. This fixes the strace teststuite.
Fixes: 5340627e3fe0 ("riscv: add support for SECCOMP and SECCOMP_FILTER")
Cc: stable@vger.kernel.org
Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Tycho Andersen <tycho@tycho.pizza>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/kernel/entry.S')
| -rw-r--r-- | arch/riscv/kernel/entry.S | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/arch/riscv/kernel/entry.S b/arch/riscv/kernel/entry.S index 524d918f3601..d07763001eb0 100644 --- a/arch/riscv/kernel/entry.S +++ b/arch/riscv/kernel/entry.S @@ -186,14 +186,7 @@ check_syscall_nr: * Syscall number held in a7. * If syscall number is above allowed value, redirect to ni_syscall. */ - bge a7, t0, 1f - /* - * Check if syscall is rejected by tracer, i.e., a7 == -1. - * If yes, we pretend it was executed. - */ - li t1, -1 - beq a7, t1, ret_from_syscall_rejected - blt a7, t1, 1f + bgeu a7, t0, 1f /* Call syscall */ la s0, sys_call_table slli t0, a7, RISCV_LGPTR |