lkml.org 
[lkml]   [2023]   [Jan]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCHv2] mm/vmalloc: replace BUG_ON to WARN_ON
As per the coding standards, in the event of an abnormal condition that should not occur under normal circumstances, the kernel should attempt recovery and proceed with execution, rather than halting the machine.
Specifically, in the alloc_vmap_area() function, use WARN_ON() and fail the request instead of using BUG_ON() to halt the machine.

Co-Developed-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Co-Developed-by: Jeungwoo Yoo <casionwoo@gmail.com>
Co-Developed-by: Sangyun Kim <sangyun.kim@snu.ac.kr>
Signed-off-by: Hyunmin Lee <hn.min.lee@gmail.com>
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Signed-off-by: Jeungwoo Yoo <casionwoo@gmail.com>
Signed-off-by: Sangyun Kim <sangyun.kim@snu.ac.kr>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
---
mm/vmalloc.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 74afa2208558..9f9dba3132c5 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1587,9 +1587,14 @@ static struct vmap_area *alloc_vmap_area(unsigned long size,
int purged = 0;
int ret;

- BUG_ON(!size);
- BUG_ON(offset_in_page(size));
- BUG_ON(!is_power_of_2(align));
+ if (WARN_ON(!size))
+ return ERR_PTR(-EINVAL);
+
+ if (WARN_ON(offset_in_page(size)))
+ return ERR_PTR(-EINVAL);
+
+ if (WARN_ON(!is_power_of_2(align)))
+ return ERR_PTR(-EINVAL);

if (unlikely(!vmap_initialized))
return ERR_PTR(-EBUSY);
--
2.25.1
\
 
 \ /
  Last update: 2023-03-27 00:00    [W:0.246 / U:0.504 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site