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| author | Eric W. Biederman <ebiederm@xmission.com> | 2018-04-20 03:09:59 +0300 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2018-04-25 18:44:05 +0300 |
| commit | c2b0e0d33b5573d4cb426e9c3ddbf2aad5e1d8a7 (patch) | |
| tree | d16f0bed4ca02e15b2e46d133f2f73577b82cda6 /arch/parisc/mm/fault.c | |
| parent | 75bfb9a1c89ae1f28cd09f7ae0d236ebde9b97ec (diff) | |
| download | linux-c2b0e0d33b5573d4cb426e9c3ddbf2aad5e1d8a7.tar.xz | |
signal/parisc: Use force_sig_mceerr where appropriate
In do_page_fault where an mceerr is generated stop and call force_sig_mceerr.
Keeping the mcerr handling logic out of the force_sig_info call below.
This ensures that only and always in the mcerr case is lsb interesting.
This ensures setting set si_lsb in the future won't accidentally
stomp another siginfo field in the non mcerr case.
Cc: James Bottomley <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: linux-parisc@vger.kernel.org
Acked-by: Helge Deller <deller@gmx.de> # parisc
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'arch/parisc/mm/fault.c')
| -rw-r--r-- | arch/parisc/mm/fault.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c index 657b35096bd8..51215b0048ef 100644 --- a/arch/parisc/mm/fault.c +++ b/arch/parisc/mm/fault.c @@ -354,7 +354,6 @@ bad_area: if (user_mode(regs)) { struct siginfo si; - unsigned int lsb = 0; clear_siginfo(&si); switch (code) { @@ -391,26 +390,27 @@ bad_area: #ifdef CONFIG_MEMORY_FAILURE if (fault & (VM_FAULT_HWPOISON|VM_FAULT_HWPOISON_LARGE)) { + unsigned int lsb = 0; printk(KERN_ERR "MCE: Killing %s:%d due to hardware memory corruption fault at %08lx\n", tsk->comm, tsk->pid, address); - si.si_signo = SIGBUS; - si.si_code = BUS_MCEERR_AR; + /* + * Either small page or large page may be poisoned. + * In other words, VM_FAULT_HWPOISON_LARGE and + * VM_FAULT_HWPOISON are mutually exclusive. + */ + if (fault & VM_FAULT_HWPOISON_LARGE) + lsb = hstate_index_to_shift(VM_FAULT_GET_HINDEX(fault)); + else if (fault & VM_FAULT_HWPOISON) + lsb = PAGE_SHIFT; + + force_sig_mceerr(BUS_MCEERR_AR, (void __user *) address, + lsb, current); + return; } #endif - /* - * Either small page or large page may be poisoned. - * In other words, VM_FAULT_HWPOISON_LARGE and - * VM_FAULT_HWPOISON are mutually exclusive. - */ - if (fault & VM_FAULT_HWPOISON_LARGE) - lsb = hstate_index_to_shift(VM_FAULT_GET_HINDEX(fault)); - else if (fault & VM_FAULT_HWPOISON) - lsb = PAGE_SHIFT; - else - show_signal_msg(regs, code, address, tsk, vma); - si.si_addr_lsb = lsb; + show_signal_msg(regs, code, address, tsk, vma); si.si_errno = 0; si.si_addr = (void __user *) address; |