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| author | Helge Deller <deller@gmx.de> | 2017-07-02 22:00:41 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2017-07-02 22:27:08 +0200 |
| commit | 247462316f85a9e0479445c1a4223950b68ffac1 (patch) | |
| tree | e50629d8faf711ee6eb415e48fa40f1dccffc76c | |
| parent | b0f94efd5aa8daa8a07d7601714c2573266cd4c9 (diff) | |
| download | linux-247462316f85a9e0479445c1a4223950b68ffac1.tar.bz2 | |
parisc: Report SIGSEGV instead of SIGBUS when running out of stack
When a process runs out of stack the parisc kernel wrongly faults with SIGBUS
instead of the expected SIGSEGV signal.
This example shows how the kernel faults:
do_page_fault() command='a.out' type=15 address=0xfaac2000 in libc-2.24.so[f8308000+16c000]
trap #15: Data TLB miss fault, vm_start = 0xfa2c2000, vm_end = 0xfaac2000
The vma->vm_end value is the first address which does not belong to the vma, so
adjust the check to include vma->vm_end to the range for which to send the
SIGSEGV signal.
This patch unbreaks building the debian libsigsegv package.
Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller <deller@gmx.de>
| -rw-r--r-- | arch/parisc/mm/fault.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c index 41448f7b2b2a..5b101f6a5607 100644 --- a/arch/parisc/mm/fault.c +++ b/arch/parisc/mm/fault.c @@ -359,7 +359,7 @@ bad_area: case 15: /* Data TLB miss fault/Data page fault */ /* send SIGSEGV when outside of vma */ if (!vma || - address < vma->vm_start || address > vma->vm_end) { + address < vma->vm_start || address >= vma->vm_end) { si.si_signo = SIGSEGV; si.si_code = SEGV_MAPERR; break; |