Skip to content
  1. Feb 05, 2022
  3. Feb 04, 2022
    • Mickaël Salaün's avatar
      printk: Fix incorrect __user type in proc_dointvec_minmax_sysadmin() · 1f2cfdd3
      Mickaël Salaün authored 
      The move of proc_dointvec_minmax_sysadmin() from kernel/sysctl.c to
kernel/printk/sysctl.c introduced an incorrect __user attribute to the
buffer argument.  I spotted this change in [1] as well as the kernel
test robot.  Revert this change to please sparse:

  kernel/printk/sysctl.c:20:51: warning: incorrect type in argument 3 (different address spaces)
  kernel/printk/sysctl.c:20:51:    expected void *
  kernel/printk/sysctl.c:20:51:    got void [noderef] __user *buffer

Fixes: faaa357a ("printk: move printk sysctl to printk/sysctl.c")
Link: https://lore.kernel.org/r/20220104155024.48023-2-mic@digikod.net

 [1]
Reported-by: default avatarkernel test robot <lkp@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: John Ogness <john.ogness@linutronix.de>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: default avatarMickaël Salaün <mic@linux.microsoft.com>
Link: https://lore.kernel.org/r/20220203145029.272640-1-mic@digikod.net


Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      1f2cfdd3
    • Igor Pylypiv's avatar
      Revert "module, async: async_synchronize_full() on module init iff async is used" · 67d6212a
      Igor Pylypiv authored 
      This reverts commit 774a1221.

We need to finish all async code before the module init sequence is
done.  In the reverted commit the PF_USED_ASYNC flag was added to mark a
thread that called async_schedule().  Then the PF_USED_ASYNC flag was
used to determine whether or not async_synchronize_full() needs to be
invoked.  This works when modprobe thread is calling async_schedule(),
but it does not work if module dispatches init code to a worker thread
which then calls async_schedule().

For example, PCI driver probing is invoked from a worker thread based on
a node where device is attached:

	if (cpu < nr_cpu_ids)
		error = work_on_cpu(cpu, local_pci_probe, &ddi);
	else
		error = local_pci_probe(&ddi);

We end up in a situation where a worker thread gets the PF_USED_ASYNC
flag set instead of the modprobe thread.  As a result,
async_synchronize_full() is not invoked and modprobe completes without...
      67d6212a
    • Linus Torvalds's avatar
      Merge branch 'for-5.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup · 305e6c42
      Linus Torvalds authored 
      Pull cgroup fixes from Tejun Heo:

 - Eric's fix for a long standing cgroup1 permission issue where it only
   checks for uid 0 instead of CAP which inadvertently allows
   unprivileged userns roots to modify release_agent userhelper

 - Fixes for the fallout from Waiman's recent cpuset work

* 'for-5.17-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup/cpuset: Fix "suspicious RCU usage" lockdep warning
  cgroup-v1: Require capabilities to set release_agent
  cpuset: Fix the bug that subpart_cpus updated wrongly in update_cpumask()
  cgroup/cpuset: Make child cpusets restrict parents on v1 hierarchy
      305e6c42
  5. Feb 03, 2022
  7. Feb 02, 2022
  9. Feb 01, 2022
  11. Jan 31, 2022
  13. Jan 30, 2022