Kernel/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2025-01-06 05:06:29 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

maple_tree: fix potential rcu issue

Browse Source 
Ensure the node isn't dead after reading the node end.

Link: https://lkml.kernel.org/r/20230120162650.984577-3-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Liam R. Howlett 2023-01-20 11:26:03 -05:00 committed by Andrew Morton
parent e7f43ca99f
commit 65be6f058b
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lib/maple_tree.c
View File

@ -4655,13 +4655,13 @@ static inline void *mas_next_nentry(struct ma_state *mas,
pivots = ma_pivots(node, type);
slots = ma_slots(node, type);
mas->index = mas_safe_min(mas, pivots, mas->offset);
count = ma_data_end(node, type, pivots, mas->max);
if (ma_dead_node(node))
return NULL;
if (mas->index > max)
return NULL;
count = ma_data_end(node, type, pivots, mas->max);
if (mas->offset > count)
return NULL;