Commit 872e9a20 authored by Wetp Zhang's avatar Wetp Zhang Committed by Linus Torvalds

mm, memory_failure: don't send BUS_MCEERR_AO for action required error

Some processes dont't want to be killed early, but in "Action Required"
case, those also may be killed by BUS_MCEERR_AO when sharing memory with
other which is accessing the fail memory.  And sending SIGBUS with
BUS_MCEERR_AO for action required error is strange, so ignore the
non-current processes here.
Suggested-by: default avatarNaoya Horiguchi <naoya.horiguchi@nec.com>
Signed-off-by: default avatarWetp Zhang <wetp.zy@linux.alibaba.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Acked-by: default avatarNaoya Horiguchi <naoya.horiguchi@nec.com>
Acked-by: default avatarPankaj Gupta <pankaj.gupta.linux@gmail.com>
Link: http://lkml.kernel.org/r/1590817116-21281-1-git-send-email-wetp.zy@linux.alibaba.comSigned-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 6972f55c
...@@ -210,14 +210,17 @@ static int kill_proc(struct to_kill *tk, unsigned long pfn, int flags) ...@@ -210,14 +210,17 @@ static int kill_proc(struct to_kill *tk, unsigned long pfn, int flags)
{ {
struct task_struct *t = tk->tsk; struct task_struct *t = tk->tsk;
short addr_lsb = tk->size_shift; short addr_lsb = tk->size_shift;
int ret; int ret = 0;
if ((t->mm == current->mm) || !(flags & MF_ACTION_REQUIRED))
pr_err("Memory failure: %#lx: Sending SIGBUS to %s:%d due to hardware memory corruption\n", pr_err("Memory failure: %#lx: Sending SIGBUS to %s:%d due to hardware memory corruption\n",
pfn, t->comm, t->pid); pfn, t->comm, t->pid);
if ((flags & MF_ACTION_REQUIRED) && t->mm == current->mm) { if (flags & MF_ACTION_REQUIRED) {
ret = force_sig_mceerr(BUS_MCEERR_AR, (void __user *)tk->addr, if (t->mm == current->mm)
addr_lsb); ret = force_sig_mceerr(BUS_MCEERR_AR,
(void __user *)tk->addr, addr_lsb);
/* send no signal to non-current processes */
} else { } else {
/* /*
* Don't use force here, it's convenient if the signal * Don't use force here, it's convenient if the signal
......
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