[PATCH bpf v2] riscv, bpf: fix incorrect usage of BPF_TRAMP_F_ORIG_STACK

[patchwork-bot+netdevbpf at kernel.org]

Hello:

This patch was applied to bpf/bpf.git (master)
by Andrii Nakryiko <andrii at kernel.org>:

On Fri, 19 Dec 2025 22:29:48 +0800 you wrote:
> The usage of BPF_TRAMP_F_ORIG_STACK in __arch_prepare_bpf_trampoline() is
> wrong, and it should be BPF_TRAMP_F_CALL_ORIG, which caused crash as
> Andreas reported:
> 
>   Insufficient stack space to handle exception!
>   Task stack:     [0xff20000000010000..0xff20000000014000]
>   Overflow stack: [0xff600000ffdad070..0xff600000ffdae070]
>   CPU: 1 UID: 0 PID: 1 Comm: systemd Not tainted 6.18.0-rc5+ #15 PREEMPT(voluntary)
>   Hardware name: riscv-virtio qemu/qemu, BIOS 2025.10 10/01/2025
>   epc : copy_from_kernel_nofault+0xa/0x198
>    ra : bpf_probe_read_kernel+0x20/0x60
>   epc : ffffffff802b732a ra : ffffffff801e6070 sp : ff2000000000ffe0
>    gp : ffffffff82262ed0 tp : 0000000000000000 t0 : ffffffff80022320
>    t1 : ffffffff801e6056 t2 : 0000000000000000 s0 : ff20000000010040
>    s1 : 0000000000000008 a0 : ff20000000010050 a1 : ff60000083b3d320
>    a2 : 0000000000000008 a3 : 0000000000000097 a4 : 0000000000000000
>    a5 : 0000000000000000 a6 : 0000000000000021 a7 : 0000000000000003
>    s2 : ff20000000010050 s3 : ff6000008459fc18 s4 : ff60000083b3d340
>    s5 : ff20000000010060 s6 : 0000000000000000 s7 : ff20000000013aa8
>    s8 : 0000000000000000 s9 : 0000000000008000 s10: 000000000058dcb0
>    s11: 000000000058dca7 t3 : 000000006925116d t4 : ff6000008090f026
>    t5 : 00007fff9b0cbaa8 t6 : 0000000000000016
>   status: 0000000200000120 badaddr: 0000000000000000 cause: 8000000000000005
>   Kernel panic - not syncing: Kernel stack overflow
>   CPU: 1 UID: 0 PID: 1 Comm: systemd Not tainted 6.18.0-rc5+ #15 PREEMPT(voluntary)
>   Hardware name: riscv-virtio qemu/qemu, BIOS 2025.10 10/01/2025
>   Call Trace:
>   [<ffffffff8001a1f8>] dump_backtrace+0x28/0x38
>   [<ffffffff80002502>] show_stack+0x3a/0x50
>   [<ffffffff800122be>] dump_stack_lvl+0x56/0x80
>   [<ffffffff80012300>] dump_stack+0x18/0x22
>   [<ffffffff80002abe>] vpanic+0xf6/0x328
>   [<ffffffff80002d2e>] panic+0x3e/0x40
>   [<ffffffff80019ef0>] handle_bad_stack+0x98/0xa0
>   [<ffffffff801e6070>] bpf_probe_read_kernel+0x20/0x60
> 
> [...]

Here is the summary with links:
  - [bpf,v2] riscv, bpf: fix incorrect usage of BPF_TRAMP_F_ORIG_STACK
    https://git.kernel.org/bpf/bpf/c/22cc16c04b78

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html