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U2FsdGVkX1+338lPNKtG0F75PksE1pR9/CFm5v2biypSOs1ic5VU95XBz1Dsd0E95WXCkZFTzmvpAAiMrBtjWDeIlHd5J+eNYTRjRFKnJEPTGvdXKIV5RwSL3JIPA8gRAgOA4/Ty+UzvPfA/R418Mg6SEH9J894jjPaoB3eKY9jtBeqS7mBFSxxhoQr0F5yQx8UIqiM6kLueCf99G4cZdXQSD8sYMPhvnD+I07CbMh4l9s7K0MmkTZhdpmuXpflUWczMmyo007cCAMg9ke17O8WGyEu0sjg3MMrDV1JjyY9HBLUOx0bXwacMPRLzyL1al44gRCW8k3GTJ8PSha2IMIyy34rd6lT6mP4dII8vNtMVUhHDQ3QXf5jqMPjvyi77kFsW60gwzT2D7lEyATMiJlKJRMOPiiP6e/GplqZQIBcNrbTcqM3iZG3oINF5k7IqVhZCJpqAze10txRvNr/PDjTLV+QfAbDGGE6+Ee5BSO8uJEur7jm5M1Q1EZziIomF7iP5cBzvwcqkoem+m4OQ0dq477AroWs5SZK2Tp80A80T23jTEjGYjEtUHaJ1OfIiDeXyByNaCgD+J91Cpxh+gKagsRLas2/YlyumkffdwiJKiZ3RNiItDe2pLjAqkb73rRqhqd/tPMFR6iBTtsxuTGoTz+6nNkcu9AfPZqaItMf8n/V3iqkLzACdldOvU40+cUqLPPjCOvcQbTtMsWVObQgzhYCpUKC0qAedZtGeSLin1Ssf39FTrb2bXKj5dQNf72NNped5HqVwpy9lTiHe0xBod+yJBoCRHrjR0H2FGakuOYWGJBI4i02bJLN2H/iyk2kAi0JnaEIDcTQVG4pPuel4V3UCgRBN8gyQJFuL2OVpg+9xJNNQ6sPTdHT0oN9ZpGc4sCZWXOdgb62g4mhKTswcDrokrgIexjHlorG5LvVqmbnVU9QAcBKuTYw8331FFbpTAV8aHek02BF8T6V RFjSUNfu 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000001, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Mar 05, 2025 at 06:27:56PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann > > The 'err' variable is set in a conditinal branch and is not > set otherwise: > > mm/mremap.c:1017:7: error: variable 'err' is used uninitialized whenever 'if' condition is false [-Werror,-Wsometimes-uninitialized] > 1017 | if (vma->vm_start != old_addr) > > Set it to zero before the initial value is set. > > Fixes: 3129f7896afb ("mm/mremap: initial refactor of move_vma()") > Signed-off-by: Arnd Bergmann Thanks for this, however this has already been fixed via Andrew doing a fix-patch which should land in mm-unstable,-next soon (possibly tmr?). This is entirely my bad btw, for some reason my compiler locally didn't catch this even with CONFIG_WERROR on which _really_ surprises me... > --- > mm/mremap.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/mm/mremap.c b/mm/mremap.c > index 456849b9e7bd..9c51a2360d84 100644 > --- a/mm/mremap.c > +++ b/mm/mremap.c > @@ -1014,6 +1014,7 @@ static unsigned long prep_move_vma(struct vma_remap_struct *vrm) > return -ENOMEM; > > if (vma->vm_ops && vma->vm_ops->may_split) { > + err = 0; > if (vma->vm_start != old_addr) > err = vma->vm_ops->may_split(vma, old_addr); > if (!err && vma->vm_end != old_addr + old_len) > -- > 2.39.5 >