tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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[PATCH] Fix MADV_REMOVE protection checking

madvise_remove needs to respect file and mmap protections.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
[ Will the real CVE-2006-1524 stand up, please.. ]
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

authored by

Hugh Dickins and committed by
Linus Torvalds 69cf0fac e14d95f7

+3
+3
mm/madvise.c
··· 168 168 return -EINVAL; 169 169 } 170 170 171 + if ((vma->vm_flags & (VM_SHARED|VM_WRITE)) != (VM_SHARED|VM_WRITE)) 172 + return -EACCES; 173 + 171 174 mapping = vma->vm_file->f_mapping; 172 175 173 176 offset = (loff_t)(start - vma->vm_start)