lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:   Fri,  7 Aug 2020 10:29:38 +0800
From:   Qianli Zhao <>
Subject: [PATCH] timer: mask unnecessary set of flags in do_init_timer

From: Qianli Zhao <>

do_init_timer can specify flags of timer_list,
but this function does not expect to specify the CPU or idx.
If user invoking do_init_timer and specify CPU,
The result may not what we expected.

do_init_timer invoked in core2,and specify flags 0x1
final result flags is 0x3.If the specified CPU number
exceeds the actual number,more serious problems will happen

Signed-off-by: Qianli Zhao <>
 kernel/time/timer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 026ac01..17e3737 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -789,7 +789,7 @@ static void do_init_timer(struct timer_list *timer,
 	timer->entry.pprev = NULL;
 	timer->function = func;
-	timer->flags = flags | raw_smp_processor_id();
+	timer->flags = (flags & ~TIMER_BASEMASK & ~TIMER_ARRAYMASK) | raw_smp_processor_id();
 	lockdep_init_map(&timer->lockdep_map, name, key, 0);

Powered by blists - more mailing lists