Hello:
This patch was applied to riscv/linux.git (fixes)
by Palmer Dabbelt <palmer@xxxxxxxxxxxx>:
On Thu, 27 Jun 2024 22:23:39 +0800 you wrote:
> Otherwise when the tracer changes syscall number to -1, the kernel fails
> to initialize a0 with -ENOSYS and subsequently fails to return the error
> code of the failed syscall to userspace. For example, it will break
> strace syscall tampering.
>
> Fixes: 52449c17bdd1 ("riscv: entry: set a0 = -ENOSYS only when syscall != -1")
> Reported-by: "Dmitry V. Levin" <ldv@xxxxxxxxx>
> Reviewed-by: Björn Töpel <bjorn@xxxxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Celeste Liu <CoelacanthusHex@xxxxxxxxx>
>
> [...]
Here is the summary with links:
- [v2] riscv: entry: always initialize regs->a0 to -ENOSYS
https://git.kernel.org/riscv/c/61119394631f
You are awesome, thank you!
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