* [PATCH AUTOSEL 6.1 09/17] s390/ptrace: fix PTRACE_GET_LAST_BREAK error handling
[not found] <20230406113211.648424-1-sashal@kernel.org>
@ 2023-04-06 11:32 ` Sasha Levin
0 siblings, 0 replies; only message in thread
From: Sasha Levin @ 2023-04-06 11:32 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Heiko Carstens, Sven Schnelle, Vasily Gorbik, Sasha Levin, oleg,
agordeev, linux-s390
From: Heiko Carstens <hca@linux.ibm.com>
[ Upstream commit f9bbf25e7b2b74b52b2f269216a92657774f239c ]
Return -EFAULT if put_user() for the PTRACE_GET_LAST_BREAK
request fails, instead of silently ignoring it.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/s390/kernel/ptrace.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 53e0209229f87..092b16b4dd4f6 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -474,9 +474,7 @@ long arch_ptrace(struct task_struct *child, long request,
}
return 0;
case PTRACE_GET_LAST_BREAK:
- put_user(child->thread.last_break,
- (unsigned long __user *) data);
- return 0;
+ return put_user(child->thread.last_break, (unsigned long __user *)data);
case PTRACE_ENABLE_TE:
if (!MACHINE_HAS_TE)
return -EIO;
@@ -824,9 +822,7 @@ long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
}
return 0;
case PTRACE_GET_LAST_BREAK:
- put_user(child->thread.last_break,
- (unsigned int __user *) data);
- return 0;
+ return put_user(child->thread.last_break, (unsigned int __user *)data);
}
return compat_ptrace_request(child, request, addr, data);
}
--
2.39.2
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