github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-19 00:58:02 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph
185a4caeec
linux/arch/powerpc/kernel/ptrace
History
Mukesh Kumar Chaurasiya (IBM) 263e5159e0 powerpc: Fix exit_flags field placement in pt_regs for ptrace 
Commit d7a6797e0b ("powerpc: add exit_flags field in pt_regs") added
the exit_flags field to struct pt_regs to pass internal exit control
flags (e.g. _TIF_RESTOREALL) from syscall_exit_prepare() to the
low-level assembly exit path.

However, the field was placed in a way that was visible to userspace
tools such as strace via PTRACE_GETREGS, or caused a struct layout or
size regression observable through ptrace. The field is purely
kernel-internal and must not be exposed beyond the user_pt_regs
boundary.

Move exit_flags into struct thread_info where it is only accessible to
the kernel, and keep it out of the ptrace-visible register window
entirely.

Fixes: d7a6797e0b ("powerpc: add exit_flags field in pt_regs")
Reported-by: Dmitry V. Levin <ldv@strace.io>
Closes: https://lore.kernel.org/all/20260722070155.GA11808@strace.io/
Signed-off-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260723194809.4046600-1-mkchauras@gmail.com
2026-07-28 10:23:31 +05:30
..
Makefile powerpc/ptrace: Don't return error when getting/setting FP regs without CONFIG_PPC_FPU_REGS 2021-04-02 00:15:37 +11:00
ptrace-adv.c powerpc/64s: avoid reloading (H)SRR registers if they are still valid 2021-06-25 00:06:55 +10:00
ptrace-altivec.c powerpc: switch to ->regset_get() 2020-07-27 14:31:07 -04:00
ptrace-decl.h powerpc/ptrace: Expose HASHKEYR register to ptrace 2023-06-19 17:36:27 +10:00
ptrace-fpu.c powerpc/32: Fix overread/overwrite of thread_struct via ptrace 2022-06-09 23:32:56 +10:00
ptrace-noadv.c powerpc/64s: avoid reloading (H)SRR registers if they are still valid 2021-06-25 00:06:55 +10:00
ptrace-novsx.c powerpc/ptrace: Don't return error when getting/setting FP regs without CONFIG_PPC_FPU_REGS 2021-04-02 00:15:37 +11:00
ptrace-spe.c powerpc: switch to ->regset_get() 2020-07-27 14:31:07 -04:00
ptrace-tm.c powerpc: Fix typos 2024-05-08 00:21:30 +10:00
ptrace-view.c powerpc/ptrace: Convert gpr32_set_common_user() to scoped user access 2026-04-01 09:21:07 +05:30
ptrace-vsx.c powerpc: Fix all occurences of duplicate words 2022-07-25 12:05:15 +10:00
ptrace.c powerpc: Fix exit_flags field placement in pt_regs for ptrace 2026-07-28 10:23:31 +05:30
ptrace32.c powerpc: remove partial register save logic 2021-04-14 23:04:44 +10:00