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Message-ID: <20241028010818.2487581-4-andrii@kernel.org>
Date: Sun, 27 Oct 2024 18:08:17 -0700
From: Andrii Nakryiko <andrii@...nel.org>
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Andrii Nakryiko <andrii@...nel.org>
Subject: [PATCH v4 tip/perf/core 3/4] uprobes: simplify find_active_uprobe_rcu() VMA checks
At the point where find_active_uprobe_rcu() is used we know that VMA in
question has triggered software breakpoint, so we don't need to validate
vma->vm_flags. Keep only vma->vm_file NULL check.
Acked-by: Oleg Nesterov <oleg@...hat.com>
Suggested-by: Oleg Nesterov <oleg@...hat.com>
Signed-off-by: Andrii Nakryiko <andrii@...nel.org>
---
kernel/events/uprobes.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 4ef4b51776eb..290c445768fa 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -2084,7 +2084,7 @@ static struct uprobe *find_active_uprobe_rcu(unsigned long bp_vaddr, int *is_swb
mmap_read_lock(mm);
vma = vma_lookup(mm, bp_vaddr);
if (vma) {
- if (valid_vma(vma, false)) {
+ if (vma->vm_file) {
struct inode *inode = file_inode(vma->vm_file);
loff_t offset = vaddr_to_offset(vma, bp_vaddr);
--
2.43.5
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