diff options
| author | Dave Airlie <airlied@redhat.com> | 2023-06-19 15:59:52 +1000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2023-06-19 16:01:25 +1000 |
| commit | cce3b573a52a41dd7face9dbf745f10f9bf4632b (patch) | |
| tree | 4540c11587221cfb90ac9cfb7916b2d2c17c6127 /arch/m68k | |
| parent | bcbede6fbeb0e1eb85ccbb532faf06d3b31f0e73 (diff) | |
| parent | 45a3e24f65e90a047bef86f927ebdc4c710edaa1 (diff) | |
Backmerge tag 'v6.4-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-next
Linux 6.4-rc7
Need this to pull in the msm work.
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'arch/m68k')
| -rw-r--r-- | arch/m68k/kernel/signal.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c index b9f6908a31bc..ba468b5f3f0b 100644 --- a/arch/m68k/kernel/signal.c +++ b/arch/m68k/kernel/signal.c @@ -858,11 +858,17 @@ static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs * } static inline void __user * -get_sigframe(struct ksignal *ksig, size_t frame_size) +get_sigframe(struct ksignal *ksig, struct pt_regs *tregs, size_t frame_size) { unsigned long usp = sigsp(rdusp(), ksig); + unsigned long gap = 0; - return (void __user *)((usp - frame_size) & -8UL); + if (CPU_IS_020_OR_030 && tregs->format == 0xb) { + /* USP is unreliable so use worst-case value */ + gap = 256; + } + + return (void __user *)((usp - gap - frame_size) & -8UL); } static int setup_frame(struct ksignal *ksig, sigset_t *set, @@ -880,7 +886,7 @@ static int setup_frame(struct ksignal *ksig, sigset_t *set, return -EFAULT; } - frame = get_sigframe(ksig, sizeof(*frame) + fsize); + frame = get_sigframe(ksig, tregs, sizeof(*frame) + fsize); if (fsize) err |= copy_to_user (frame + 1, regs + 1, fsize); @@ -952,7 +958,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, return -EFAULT; } - frame = get_sigframe(ksig, sizeof(*frame)); + frame = get_sigframe(ksig, tregs, sizeof(*frame)); if (fsize) err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize); |