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Red Hat Bugzilla – Attachment 272781 Details for
Bug 404201
remap_file_pages02 system call fails on FC8GA
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Patch for invalid pgoff
Patch_for_Invalid_pgoff (text/plain), 828 bytes, created by
IBM Bug Proxy
on 2007-11-29 10:50:34 UTC
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Description:
Patch for invalid pgoff
Filename:
MIME Type:
Creator:
IBM Bug Proxy
Created:
2007-11-29 10:50:34 UTC
Size:
828 bytes
patch
obsolete
>Signed-off-by: Supriya Kannery <supriyak@in.ibm.com> > >--- linux-2.6.23/mm/fremap.c.orig 2007-11-22 00:56:09.000000000 -0600 >+++ linux-2.6.23/mm/fremap.c 2007-11-26 03:08:55.000000000 -0600 >@@ -124,6 +124,7 @@ asmlinkage long sys_remap_file_pages(uns > struct vm_area_struct *vma; > int err = -EINVAL; > int has_write_lock = 0; >+ unsigned long f_size = 0; > > if (__prot) > return err; >@@ -181,6 +182,14 @@ asmlinkage long sys_remap_file_pages(uns > goto retry; > } > mapping = vma->vm_file->f_mapping; >+ >+ f_size = i_size_read(mapping->host) + PAGE_CACHE_SIZE - 1; >+ f_size = f_size >> PAGE_CACHE_SHIFT; >+ if ((pgoff + size >> PAGE_CACHE_SHIFT) > f_size) { >+ err = -EINVAL; >+ goto out; >+ } >+ > /* > * page_mkclean doesn't work on nonlinear vmas, so if > * dirty pages need to be accounted, emulate with linear
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bug 404201
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