Re: [PATCH] fbcon: Fix OOB access in font allocation

/-/issues/15020 > Cc: Samasth Norway Ananda > Cc: Thomas Zimmermann > Cc: George Kennedy > Cc: Greg Kroah-Hartman > Cc: Simona Vetter > Cc: Helge Deller > Cc: "Ville Syrjälä" > Cc: Sam Ravnborg > Cc: Qianqiang Liu > Cc: Shixiong Ou > Cc: Kees Cook > Cc:

Re: [PATCH v2 3/9] crash_core: use panic_try_start() in crash_kexec()

panic()/crash_kexec() >* call. > */ > - atomic_set(&panic_cpu, PANIC_CPU_INVALID); > + panic_reset(); > } > } > > -- > 2.43.0 -- Best, Qianqiang Liu

Re: [PATCH 2/9] fbdev: Use panic_in_progress() helper

return (info->skip_panic && unlikely(oops_in_progress)); > -#else > - return (info->skip_panic && unlikely(atomic_read(&panic_cpu) != > PANIC_CPU_INVALID)); > -#endif > + return (info->skip_panic && unlikely(panic_in_progress())); > } > > static inline bool fbcon_is_active(struct vc_data *vc, struct fb_info *info) > -- > 2.43.0 Acked-by Qianqiang Liu -- Best, Qianqiang Liu

[PATCH] fbcon: break earlier in search_fb_in_map and search_for_mapped_con

Break the for loop immediately upon finding the target, making the process more efficient. Signed-off-by: Qianqiang Liu --- drivers/video/fbdev/core/fbcon.c | 8 ++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core

[PATCH v3] fbcon: Fix a NULL pointer dereference issue in fbcon_putcs

/syzkaller.appspot.com/bug?extid=3d613ae53c031502687a Tested-by: syzbot+3d613ae53c0315026...@syzkaller.appspotmail.com Signed-off-by: Qianqiang Liu --- Changes since v2: - Document the commit message in more detail --- Changes since v1: - Initialize ops->putcs by calling set_blitting_type()

[PATCH v2] fbcon: Fix a NULL pointer dereference issue in fbcon_putcs

87a Tested-by: syzbot+3d613ae53c0315026...@syzkaller.appspotmail.com Signed-off-by: Qianqiang Liu --- Changes since v1: - Initialize ops->putcs by calling set_blitting_type() --- drivers/video/fbdev/core/fbcon.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/video/fbdev/core/f

Re: [PATCH] fbcon: Fix a NULL pointer dereference issue in fbcon_putcs

&con2fb); return 0; } But I still need time to debug the kernel code.. -- Best, Qianqiang Liu

[PATCH] fbcon: Fix a NULL pointer dereference issue in fbcon_putcs

 > I think this patch just hides the real problem. > How could putcs have become NULL ? > > Helge Oh, you are right! I will figure it out. Best, Qianqiang Liu

[PATCH] fbcon: Fix a NULL pointer dereference issue in fbcon_putcs

bot+3d613ae53c0315026...@syzkaller.appspotmail.com Signed-off-by: Qianqiang Liu --- drivers/video/fbdev/core/fbcon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index 3f7333dca508..96c1262cc981 100644 --- a/driv