On Thu, Dec 18, 2025 at 10:45 PM Andreas Schwab <[email protected]> wrote: > > On Nov 18 2025, Menglong Dong wrote: > > > Some places calculate the origin_call by checking if > > BPF_TRAMP_F_SKIP_FRAME is set. However, it should use > > BPF_TRAMP_F_ORIG_STACK for this propose. Just fix them. > > > > Signed-off-by: Menglong Dong <[email protected]> > > Acked-by: Alexei Starovoitov <[email protected]> > > This breaks RISC-V:
It's weird, as the 2 flags should be set together all the time in RISC-V. Sorry that I'm already in bed, I'll check it tomorrow morning. Thanks! Menglong Dong > > [ 8.584381][ T1] systemd[1]: bpf-restrict-fs: LSM BPF program attached > [ 8.588359][ T1] Insufficient stack space to handle exception! > [ 8.588823][ T1] Task stack: > [0xff20000000010000..0xff20000000014000] > [ 8.589219][ T1] Overflow stack: > [0xff600000ffdad070..0xff600000ffdae070] > [ 8.590133][ T1] CPU: 1 UID: 0 PID: 1 Comm: systemd Not tainted > 6.18.0-rc5+ #15 PREEMPT(voluntary) c900881ed1c1988ec5cf3e914d0edeb1b4d83ca3 > [ 8.590898][ T1] Hardware name: riscv-virtio qemu/qemu, BIOS 2025.10 > 10/01/2025 > [ 8.591494][ T1] epc : copy_from_kernel_nofault+0xa/0x198 > [ 8.592292][ T1] ra : bpf_probe_read_kernel+0x20/0x60 > [ 8.592658][ T1] epc : ffffffff802b732a ra : ffffffff801e6070 sp : > ff2000000000ffe0 > [ 8.593121][ T1] gp : ffffffff82262ed0 tp : 0000000000000000 t0 : > ffffffff80022320 > [ 8.593566][ T1] t1 : ffffffff801e6056 t2 : 0000000000000000 s0 : > ff20000000010040 > [ 8.593997][ T1] s1 : 0000000000000008 a0 : ff20000000010050 a1 : > ff60000083b3d320 > [ 8.594446][ T1] a2 : 0000000000000008 a3 : 0000000000000097 a4 : > 0000000000000000 > [ 8.594940][ T1] a5 : 0000000000000000 a6 : 0000000000000021 a7 : > 0000000000000003 > [ 8.595396][ T1] s2 : ff20000000010050 s3 : ff6000008459fc18 s4 : > ff60000083b3d340 > [ 8.595831][ T1] s5 : ff20000000010060 s6 : 0000000000000000 s7 : > ff20000000013aa8 > [ 8.596215][ T1] s8 : 0000000000000000 s9 : 0000000000008000 s10: > 000000000058dcb0 > [ 8.596641][ T1] s11: 000000000058dca7 t3 : 000000006925116d t4 : > ff6000008090f026 > [ 8.597065][ T1] t5 : 00007fff9b0cbaa8 t6 : 0000000000000016 > [ 8.597363][ T1] status: 0000000200000120 badaddr: 0000000000000000 > cause: 8000000000000005 > [ 8.598033][ T1] Kernel panic - not syncing: Kernel stack overflow > [ 8.598597][ T1] CPU: 1 UID: 0 PID: 1 Comm: systemd Not tainted > 6.18.0-rc5+ #15 PREEMPT(voluntary) c900881ed1c1988ec5cf3e914d0edeb1b4d83ca3 > [ 8.599244][ T1] Hardware name: riscv-virtio qemu/qemu, BIOS 2025.10 > 10/01/2025 > [ 8.599659][ T1] Call Trace: > [ 8.600117][ T1] [<ffffffff8001a1f8>] dump_backtrace+0x28/0x38 > [ 8.600517][ T1] [<ffffffff80002502>] show_stack+0x3a/0x50 > [ 8.600844][ T1] [<ffffffff800122be>] dump_stack_lvl+0x56/0x80 > [ 8.601176][ T1] [<ffffffff80012300>] dump_stack+0x18/0x22 > [ 8.601518][ T1] [<ffffffff80002abe>] vpanic+0xf6/0x328 > [ 8.601819][ T1] [<ffffffff80002d2e>] panic+0x3e/0x40 > [ 8.602088][ T1] [<ffffffff80019ef0>] handle_bad_stack+0x98/0xa0 > [ 8.602395][ T1] [<ffffffff801e6070>] bpf_probe_read_kernel+0x20/0x60 > > -- > Andreas Schwab, [email protected] > GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 > "And now for something completely different."
