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882a2a724e
linux/arch/parisc
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Guenter Roeck 882a2a724e parisc: Fix stack unwinder 
Debugging shows a large number of unaligned access traps in the unwinder
code. Code analysis reveals a number of issues with this code:

- handle_interruption is passed twice through
  dereference_kernel_function_descriptor()
- ret_from_kernel_thread, syscall_exit, intr_return,
  _switch_to_ret, and _call_on_stack are passed through
  dereference_kernel_function_descriptor() even though they are
  not declared as function pointers.

To fix the problems, drop one of the calls to
dereference_kernel_function_descriptor() for handle_interruption,
and compare the other pointers directly.

Fixes: 6414b30b39 ("parisc: unwind: Avoid missing prototype warning for handle_interruption()")
Fixes: 8e0ba125c2 ("parisc/unwind: fix unwinder when CONFIG_64BIT is enabled")
Cc: Helge Deller <deller@gmx.de>
Cc: Sven Schnelle <svens@stackframe.org>
Cc: John David Anglin <dave.anglin@bell.net>
Cc: Charlie Jenkins <charlie@rivosinc.com>
Cc: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Helge Deller <deller@gmx.de>
2024-02-19 21:55:22 +01:00
..
boot parisc: Allow building uncompressed Linux kernel 2023-10-30 14:54:40 +01:00
configs staging: qlge: Retire the driver 2023-10-21 11:52:54 +02:00
include parisc/kprobes: always include asm-generic/kprobes.h 2024-02-16 20:18:03 +01:00
kernel parisc: Fix stack unwinder 2024-02-19 21:55:22 +01:00
lib parisc: ucmpdi2: Fix no previous prototype for '__ucmpdi2' warning 2023-08-10 18:34:05 +02:00
math-emu parisc: math-emu: Avoid compiler warnings with W=1 2023-07-03 18:56:03 +02:00
mm parisc: Fix random data corruption from exception handler 2024-01-30 17:18:58 +01:00
net parisc: Add eBPF JIT compiler glue code and Makefile 2023-08-22 10:24:47 +02:00
video arch/parisc: Detect primary video device from device instance 2024-01-12 12:38:37 +01:00
defpalo.conf
install.sh kbuild: factor out the common installation code into scripts/install.sh 2022-05-11 21:45:53 +09:00
Kbuild parisc: Wire up eBPF JIT compiler 2023-08-22 10:24:47 +02:00
Kconfig parisc: Fix random data corruption from exception handler 2024-01-30 17:18:58 +01:00
Kconfig.debug parisc: Use page table locks only if DEBUG_KERNEL is enabled 2023-08-20 20:23:46 +02:00
Makefile kbuild: Replace tabs with spaces when followed by conditionals 2024-01-31 23:24:27 +09:00