Commit-ID: aefd8933d445abf7ff0d4027c624737898827bcd Gitweb: http://git.kernel.org/tip/aefd8933d445abf7ff0d4027c624737898827bcd Author: Oleg Nesterov <[email protected]> AuthorDate: Sun, 29 Jul 2012 20:22:33 +0200 Committer: Ingo Molnar <[email protected]> CommitDate: Mon, 30 Jul 2012 11:27:21 +0200
uprobes: Fix overflow in vma_address()/find_active_uprobe() vma->vm_pgoff is "unsigned long", it should be promoted to loff_t before the multiplication to avoid the overflow. Signed-off-by: Oleg Nesterov <[email protected]> Acked-by: Srikar Dronamraju <srikar.vnet.ibm.com> Cc: Anton Arapov <[email protected]> Cc: Srikar Dronamraju <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]> --- kernel/events/uprobes.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 9db9cdf..fb961d5 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -117,7 +117,7 @@ static loff_t vma_address(struct vm_area_struct *vma, loff_t offset) loff_t vaddr; vaddr = vma->vm_start + offset; - vaddr -= vma->vm_pgoff << PAGE_SHIFT; + vaddr -= (loff_t)vma->vm_pgoff << PAGE_SHIFT; return vaddr; } @@ -1450,7 +1450,7 @@ static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp) inode = vma->vm_file->f_mapping->host; offset = bp_vaddr - vma->vm_start; - offset += (vma->vm_pgoff << PAGE_SHIFT); + offset += (loff_t)vma->vm_pgoff << PAGE_SHIFT; uprobe = find_uprobe(inode, offset); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
