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

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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: Naoya Horiguchi <[email protected]>
Signed-off-by: Wetp Zhang <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Acked-by: Naoya Horiguchi <[email protected]>
Acked-by: Pankaj Gupta <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Wetp Zhang authored and Linus Torvalds committed 2020-06-02 10:59:10 -07:00
1 parent 6972f55c41
commit 872e9a205c
1 file changed
+9 -6
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mm/memory-failure.c
+9 -6
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@@ -210,14 +210,17 @@ static int kill_proc(struct to_kill *tk, unsigned long pfn, int flags)
{
struct task_struct *t = tk->tsk;
short addr_lsb = tk->size_shift;
int ret;
int ret = 0;
pr_err("Memory failure: %#lx: Sending SIGBUS to %s:%d due to hardware memory corruption\n",
pfn, t->comm, t->pid);
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",
pfn, t->comm, t->pid);
if ((flags & MF_ACTION_REQUIRED) && t->mm == current->mm) {
ret = force_sig_mceerr(BUS_MCEERR_AR, (void __user *)tk->addr,
addr_lsb);
if (flags & MF_ACTION_REQUIRED) {
if (t->mm == current->mm)
ret = force_sig_mceerr(BUS_MCEERR_AR,
(void __user *)tk->addr, addr_lsb);
/* send no signal to non-current processes */
} else {
/*
* Don't use force here, it's convenient if the signal