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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: none client-ip=2607:f8b0:4864:20::c33; envelope-from=akihiko.odaki@daynix.com; helo=mail-oo1-xc33.google.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @daynix-com.20221208.gappssmtp.com) X-ZM-MESSAGEID: 1690960747816100001 Content-Type: text/plain; charset="utf-8" Linux 6.4.7 does nothing when a value smaller than the initial brk is specified. Fixes: 86f04735ac ("linux-user: Fix brk() to release pages") Reviewed-by: Helge Deller Signed-off-by: Akihiko Odaki --- linux-user/syscall.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/linux-user/syscall.c b/linux-user/syscall.c index ac429a185a..ebdc8c144c 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -820,14 +820,14 @@ abi_long do_brk(abi_ulong brk_val) =20 /* brk pointers are always untagged */ =20 - /* return old brk value if brk_val unchanged or zero */ - if (!brk_val || brk_val =3D=3D target_brk) { + /* return old brk value if brk_val unchanged */ + if (brk_val =3D=3D target_brk) { return target_brk; } =20 /* do not allow to shrink below initial brk value */ if (brk_val < initial_target_brk) { - brk_val =3D initial_target_brk; + return target_brk; } =20 new_brk =3D TARGET_PAGE_ALIGN(brk_val); --=20 2.41.0