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| author | Naveen N Rao <naveen@kernel.org> | 2023-11-30 07:59:47 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-12-05 04:14:12 +0100 |
| commit | 4b3338aaa74d7d4ec5b6734dc298f0db94ec83d2 (patch) | |
| tree | e78e6589cc56016d61abbee8b1874a57848b3955 /arch | |
| parent | KVM: PPC: Book3S HV: Fix KVM_RUN clobbering FP/VEC user registers (diff) | |
| download | linux-4b3338aaa74d7d4ec5b6734dc298f0db94ec83d2.tar.xz linux-4b3338aaa74d7d4ec5b6734dc298f0db94ec83d2.zip | |
powerpc/ftrace: Fix stack teardown in ftrace_no_trace
Commit 41a506ef71eb ("powerpc/ftrace: Create a dummy stackframe to fix
stack unwind") added use of a new stack frame on ftrace entry to fix
stack unwind. However, the commit missed updating the offset used while
tearing down the ftrace stack when ftrace is disabled. Fix the same.
In addition, the commit missed saving the correct stack pointer in
pt_regs. Update the same.
Fixes: 41a506ef71eb ("powerpc/ftrace: Create a dummy stackframe to fix stack unwind")
Cc: stable@vger.kernel.org # v6.5+
Signed-off-by: Naveen N Rao <naveen@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231130065947.2188860-1-naveen@kernel.org
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/trace/ftrace_entry.S | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/trace/ftrace_entry.S b/arch/powerpc/kernel/trace/ftrace_entry.S index 90701885762c..40677416d7b2 100644 --- a/arch/powerpc/kernel/trace/ftrace_entry.S +++ b/arch/powerpc/kernel/trace/ftrace_entry.S @@ -62,7 +62,7 @@ .endif /* Save previous stack pointer (r1) */ - addi r8, r1, SWITCH_FRAME_SIZE + addi r8, r1, SWITCH_FRAME_SIZE+STACK_FRAME_MIN_SIZE PPC_STL r8, GPR1(r1) .if \allregs == 1 @@ -182,7 +182,7 @@ ftrace_no_trace: mflr r3 mtctr r3 REST_GPR(3, r1) - addi r1, r1, SWITCH_FRAME_SIZE + addi r1, r1, SWITCH_FRAME_SIZE+STACK_FRAME_MIN_SIZE mtlr r0 bctr #endif |