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Unverified Commit f81393a5 authored by Jisheng Zhang's avatar Jisheng Zhang Committed by Palmer Dabbelt
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riscv: extable: fix err reg writing in dedicated uaccess handler



Mayuresh reported commit 20802d8d ("riscv: extable: add a dedicated
uaccess handler") breaks the writev02 test case in LTP. This is due to
the err reg isn't correctly set with the errno(-EFAULT in writev02
case). First of all, the err and zero regs are reg numbers rather than
reg offsets in struct pt_regs; Secondly, regs_set_gpr() should write
the regs when offset isn't zero(zero means epc)

Fix it by correcting regs_set_gpr() logic and passing the correct reg
offset to it.

Reported-by: default avatarMayuresh Chitale <mchitale@ventanamicro.com>
Fixes: 20802d8d ("riscv: extable: add a dedicated uaccess handler")
Signed-off-by: default avatarJisheng Zhang <jszhang@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent ca0cb9a6
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