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authorEric W. Biederman <ebiederm@xmission.com>2017-08-02 13:51:22 -0500
committerEric W. Biederman <ebiederm@xmission.com>2018-01-23 12:17:48 -0600
commitc0f45555b82450a56c0da11866163b764aeb1a21 (patch)
treef83742a8c53945acfc83a96ce4861712b38967b6 /mm/memory-failure.c
parentmm/memory_failure: Remove unused trapno from memory_failure (diff)
downloadlinux-dev-c0f45555b82450a56c0da11866163b764aeb1a21.tar.xz
linux-dev-c0f45555b82450a56c0da11866163b764aeb1a21.zip
signal/memory-failure: Use force_sig_mceerr and send_sig_mceerr
Delegate filling out struct siginfo to functions in kernel/signal.c to simplify the code. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to '')
-rw-r--r--mm/memory-failure.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index c5f5f31bd979..4b80ccee4535 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -181,19 +181,16 @@ EXPORT_SYMBOL_GPL(hwpoison_filter);
static int kill_proc(struct task_struct *t, unsigned long addr,
unsigned long pfn, struct page *page, int flags)
{
- struct siginfo si;
+ short addr_lsb;
int ret;
pr_err("Memory failure: %#lx: Killing %s:%d due to hardware memory corruption\n",
pfn, t->comm, t->pid);
- si.si_signo = SIGBUS;
- si.si_errno = 0;
- si.si_addr = (void *)addr;
- si.si_addr_lsb = compound_order(compound_head(page)) + PAGE_SHIFT;
+ addr_lsb = compound_order(compound_head(page)) + PAGE_SHIFT;
if ((flags & MF_ACTION_REQUIRED) && t->mm == current->mm) {
- si.si_code = BUS_MCEERR_AR;
- ret = force_sig_info(SIGBUS, &si, current);
+ ret = force_sig_mceerr(BUS_MCEERR_AR, (void __user *)addr,
+ addr_lsb, current);
} else {
/*
* Don't use force here, it's convenient if the signal
@@ -201,8 +198,8 @@ static int kill_proc(struct task_struct *t, unsigned long addr,
* This could cause a loop when the user sets SIGBUS
* to SIG_IGN, but hopefully no one will do that?
*/
- si.si_code = BUS_MCEERR_AO;
- ret = send_sig_info(SIGBUS, &si, t); /* synchronous? */
+ ret = send_sig_mceerr(BUS_MCEERR_AO, (void __user *)addr,
+ addr_lsb, t); /* synchronous? */
}
if (ret < 0)
pr_info("Memory failure: Error sending signal to %s:%d: %d\n",