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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-11-22 15:14:23 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-11-25 09:15:42 +0100 |
| commit | 127581b64b432804948535d49847b36366b9ff64 (patch) | |
| tree | a80327504b911543d9a18e8a29d49a35ee8759d6 /arch/s390/kernel | |
| parent | 8adbf78ec4839c1dc4ff20c9a1f332a7bc99e6e6 (diff) | |
| download | linux-127581b64b432804948535d49847b36366b9ff64.tar.bz2 | |
s390/mm: handle asce-type exceptions as normal page fault
Git commit 9e34f2686bb088b211b6cac8772e1f644c6180f8
"s390/mm,tlb: tlb flush on page table upgrade fixup" removed the
exception handler for the asce-type exception. This is incorrect
as the user-copy with MVCOS can cause asce-type exceptions in
the kernel if a user pointer is too large. Those need to be
handled with do_no_context to branch to the fixup in the
user-copy code.
The simplest fix for this problem is to call do_dat_exception for
asce-type excpetions, as there is no vma for the address the code
will handle the exception correctly.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/pgm_check.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kernel/pgm_check.S b/arch/s390/kernel/pgm_check.S index 4a460c44e17e..813ec7260878 100644 --- a/arch/s390/kernel/pgm_check.S +++ b/arch/s390/kernel/pgm_check.S @@ -78,7 +78,7 @@ PGM_CHECK_DEFAULT /* 34 */ PGM_CHECK_DEFAULT /* 35 */ PGM_CHECK_DEFAULT /* 36 */ PGM_CHECK_DEFAULT /* 37 */ -PGM_CHECK_DEFAULT /* 38 */ +PGM_CHECK_64BIT(do_dat_exception) /* 38 */ PGM_CHECK_64BIT(do_dat_exception) /* 39 */ PGM_CHECK_64BIT(do_dat_exception) /* 3a */ PGM_CHECK_64BIT(do_dat_exception) /* 3b */ |