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uprobes: simplify find_active_uprobe_rcu() VMA checks

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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.

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Link: https://lkml.kernel.org/r/20241122035922.3321100-2-andrii@kernel.org
This commit is contained in:
Andrii Nakryiko 2024-11-21 19:59:21 -08:00 committed by Peter Zijlstra
parent 03a001b156
commit 83e3dc9a5d
1 changed files with 1 additions and 1 deletions
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2
kernel/events/uprobes.c
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@ -2304,7 +2304,7 @@ 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);