This is a note to let you know that I've just added the patch titled
mm/memory: Use exception ip to search exception tables
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mm-memory-use-exception-ip-to-search-exception-table.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4b17d1b4ad82efdf7ac399920ce67ded22f50c16
Author: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Date: Fri Feb 2 12:30:28 2024 +0000
mm/memory: Use exception ip to search exception tables
[ Upstream commit 8fa5070833886268e4fb646daaca99f725b378e9 ]
On architectures with delay slot, instruction_pointer() may differ
from where exception was triggered.
Use exception_ip we just introduced to search exception tables to
get rid of the problem.
Fixes: 4bce37a68ff8 ("mips/mm: Convert to using lock_mm_and_find_vma()")
Reported-by: Xi Ruoyao <xry111@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/75e9fd7b08562ad9b456a5bdaacb7cc220311cc9.camel@xxxxxxxxxxx/
Suggested-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
Signed-off-by: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/mm/memory.c b/mm/memory.c
index 6e0712d06cd4..f941489d6041 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -5373,7 +5373,7 @@ static inline bool get_mmap_lock_carefully(struct mm_struct *mm, struct pt_regs
return true;
if (regs && !user_mode(regs)) {
- unsigned long ip = instruction_pointer(regs);
+ unsigned long ip = exception_ip(regs);
if (!search_exception_tables(ip))
return false;
}
@@ -5398,7 +5398,7 @@ static inline bool upgrade_mmap_lock_carefully(struct mm_struct *mm, struct pt_r
{
mmap_read_unlock(mm);
if (regs && !user_mode(regs)) {
- unsigned long ip = instruction_pointer(regs);
+ unsigned long ip = exception_ip(regs);
if (!search_exception_tables(ip))
return false;
}
