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Vlastimil Babka authored
After upgrading build guests to v6.3, rpm started segfaulting for specific packages, which was bisected to commit 0503ea8f ("mm/mmap: remove __vma_adjust()"). rpm is doing many mremap() operations with file mappings of its db. The problem is that in vma_merge() case 3 (we merge with the next vma, expanding it downwards) vm_pgoff is not adjusted as it should when vm_start changes. As a result the rpm process most likely sees data from the wrong offset of the file. Fix the vm_pgoff calculation. For case 8 this is a non-functional change as the resulting vm_pgoff is the same. Reported-and-bisected-by:
Jiri Slaby <jirislaby@kernel.org> Reported-and-tested-by:
Fabian Vogt <fvogt@suse.com> Link: https://bugzilla.suse.com/show_bug.cgi?id=1210903 Fixes: 0503ea8f ("mm/mmap: remove __vma_adjust()") Signed-off-by:
Vlastimil Babka <vbabka@suse.cz> Cc: <stable@vger.kernel.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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