6:18 p.m.
tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.10
head: 73dbeef4571d1037d5e03374fad31195f60956cf
commit: 264a61835373f3600e2eed6966ca6240a98af38f [114/1031] CHROMIUM: sysrq: Added Chrome
OS specific 'x' key
config: i386-randconfig-s001-20201217 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.3-184-g1b896707-dirty
git remote add chrome-os
https://chromium.googlesource.com/chromiumos/third_party/kernel
git fetch --no-tags chrome-os chromeos-5.10
git checkout 264a61835373f3600e2eed6966ca6240a98af38f
# save the attached .config to linux build tree
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
"sparse warnings: (new ones prefixed by >>)"
> drivers/tty/sysrq.c:456:40: sparse: sparse: incorrect type in
argument 1 (different address spaces) @@ expected char const *cs @@ got char
[noderef] __rcu * @@
drivers/tty/sysrq.c:456:40: sparse: expected char const
*cs
drivers/tty/sysrq.c:456:40: sparse: got char [noderef] __rcu *
drivers/tty/sysrq.c: note: in included file (through include/linux/rculist.h,
include/linux/sched/signal.h):
include/linux/rcupdate.h:693:9: sparse: sparse: context imbalance in
'sysrq_handle_crash' - unexpected unlock
vim +456 drivers/tty/sysrq.c
441
442 /* send a signal to a process named comm if it has a certain parent */
443 /* if parent is NULL, send to the first matching process */
444 static void sysrq_x_cros_signal_process(char *comm, char *parent, int sig)
445 {
446 struct task_struct *p;
447
448 read_lock(&tasklist_lock);
449 for_each_process(p) {
450 if (p->flags & (PF_KTHREAD | PF_EXITING))
451 continue;
452 if (is_global_init(p))
453 continue;
454 if (strncmp(p->comm, comm, TASK_COMM_LEN))
455 continue;
456 if (parent && strncmp(p->parent->comm, parent,
TASK_COMM_LEN))
457 continue;
458
459 printk(KERN_INFO "%s: signal %d %s pid %u tgid %u\n",
460 __func__, sig, comm, p->pid, p->tgid);
461 do_send_sig_info(sig, SEND_SIG_PRIV, p, true);
462 }
463 read_unlock(&tasklist_lock);
464 }
465
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org