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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-08-18 19:19:24 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-03 15:01:12 +0100 |
| commit | debf122c777f361137a3114db7be8aecc65f6af2 (patch) | |
| tree | 65321e7665869322ebbeef3dc8ca47e962d9d00a /arch/powerpc/kernel/signal_32.c | |
| parent | powerpc/signal: Refactor bad frame logging (diff) | |
| download | linux-debf122c777f361137a3114db7be8aecc65f6af2.tar.xz linux-debf122c777f361137a3114db7be8aecc65f6af2.zip | |
powerpc/signal32: Simplify logging in handle_rt_signal32()
If something is bad in the frame, there is no point in
knowing which part of the frame exactly is wrong as it
got allocated as a single block.
Always print the root address of the frame in case of
failed user access, just like handle_signal32().
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/691895bd31fee89a2d8370befd66ad4eff5b63f2.1597770847.git.christophe.leroy@csgroup.eu
Diffstat (limited to '')
| -rw-r--r-- | arch/powerpc/kernel/signal_32.c | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index deb729c8b79d..44a46911ff98 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -754,7 +754,6 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset, struct rt_sigframe __user *rt_sf; struct mcontext __user *frame; struct mcontext __user *tm_frame = NULL; - void __user *addr; unsigned long newsp = 0; int sigret; unsigned long tramp; @@ -767,7 +766,6 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset, /* Set up Signal Frame */ /* Put a Real Time Context onto stack */ rt_sf = get_sigframe(ksig, tsk, sizeof(*rt_sf), 1); - addr = rt_sf; if (!access_ok(rt_sf, sizeof(*rt_sf))) goto badframe; @@ -782,7 +780,6 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset, /* Save user registers on the stack */ frame = &rt_sf->uc.uc_mcontext; - addr = frame; if (vdso32_rt_sigtramp && tsk->mm->context.vdso_base) { sigret = 0; tramp = tsk->mm->context.vdso_base + vdso32_rt_sigtramp; @@ -818,7 +815,6 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset, /* create a stack frame for the caller of the handler */ newsp = ((unsigned long)rt_sf) - (__SIGNAL_FRAMESIZE + 16); - addr = (void __user *)regs->gpr[1]; if (put_user(regs->gpr[1], (u32 __user *)newsp)) goto badframe; @@ -835,7 +831,7 @@ int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset, return 0; badframe: - signal_fault(tsk, regs, "handle_rt_signal32", addr); + signal_fault(tsk, regs, "handle_rt_signal32", rt_sf); return 1; } |