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| author | Sven Schnelle <svens@stackframe.org> | 2019-10-30 09:17:18 +0100 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2019-10-30 21:24:40 +0100 |
| commit | 3d252454edd0fe88c8250cb7f9dfb9ec12d208d7 (patch) | |
| tree | 251da25272b1694124dc2a7ec2dd98e0dbf6544f /arch | |
| parent | 320000e72ec0613e164ce9608d865396fb2da278 (diff) | |
| download | linux-3d252454edd0fe88c8250cb7f9dfb9ec12d208d7.tar.gz | |
parisc: fix frame pointer in ftrace_regs_caller()
The current code in ftrace_regs_caller() doesn't assign %r3 to contain the address of the current frame. This is hidden if the kernel is compiled with FRAME_POINTER, but without it just crashes because it tries to dereference an arbitrary address. Fix this by always setting %r3 to the current stack frame. Signed-off-by: Sven Schnelle <svens@stackframe.org> Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/parisc/kernel/entry.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index 1d1d748c227f..b96d74496977 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -2125,7 +2125,7 @@ ftrace_regs_caller: copy %rp, %r26 LDREG -FTRACE_FRAME_SIZE-PT_SZ_ALGN(%sp), %r25 ldo -8(%r25), %r25 - copy %r3, %arg2 + ldo -FTRACE_FRAME_SIZE(%r1), %arg2 b,l ftrace_function_trampoline, %rp copy %r1, %arg3 /* struct pt_regs */ |