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Jones" , Mark W , regressions@lists.linux.dev, Johannes Weiner , Yosry Ahmed , Nhat Pham , Chengming Zhou Subject: Re: [REGRESSION] Null pointer dereference while shrinking zswap Message-ID: References: <3iccc6vjl5gminut3lvpl4va2lbnsgku5ei2d7ylftoofy3n2v@gcfdvtsq6dx2> <20240416121804.a46c4174f6cec30ab51f18e5@linux-foundation.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="spwgmais55ecsdks" Content-Disposition: inline In-Reply-To: <20240416121804.a46c4174f6cec30ab51f18e5@linux-foundation.org> X-Provags-ID: V03:K1:VVNgfLCOO5Io105TxXnz7lw0tRYCRwFN0OllGFLpujKGjs8SlXc rGNZLRKb5sOWas5qlY05y9gNMecsR08+8EvVr8Y83oGaWmWfFdnJA9zg7RrX6ENZTTjUBq4 HjBURswxpXpjZsH8o4R8vMILQCJsEjeSQlJeSNUrhI5F/Uceg4UF2HYbV3xoV1GTi+CcCbH IeRXLxKyZ4WN7VXOrlVVA== UI-OutboundReport: notjunk:1;M01:P0:nQpl5GbXnRA=;ac2yIz8qu7+et/kUR7dF5BxvO+C ThCcUubLt+on/h7DGWuDKYrliAElyhgEHX8dTMOj71UfHzN1QXnBZTBIxXprifmsRqY9rFljg IvVnRcudze9sSVvhM3NpfsUZvTj0CoIMa3Rmii5Fo8KJsPwHEPk2BbCIDA1Yuudw8q/bvWe5E iUSatww3TvnTGmvJEXfB6ESLRZTyl9t5GulrxqiJzKaQdTqIgjlF6yuAnuJNjAidDHtSl6Me/ 4/9V46tv+EgMz7LJbFcgNCnF4u1WLPIOQXuA1IAACs3HrSbBUNDENvr/PxA5CWs58jZjs1l8d HI+YiLAd4RzOyBZpFyi/pxpFXcFTXjlEYFVm/yxtodRXQlJ+LyvzfPxarHDWHJ+PU2kzRzRAk chsOZG5J6IOMhSzGBybLZr5r3XRmMZsf2byE8mTOCeUoQwmJhhz65q/VdPRiMoJBjlPLCTqdk INjHA3MxbGevtIe+8pahffaPfwbAs/nuqP+xA14o81FO75XNAaRMirijzK+WHxDLd8gJfQoiX 1VO343F3O4c8xwkm2KLPRh4qRzq8dIepo1G5oHoLhQt9v60X8z+ohdVNY0apL81SIuT2bYuKY X8z07uHoElAWbDRSgkj0gZ+UghwEoYlo3PN2QfYVAmr7NpGNkXH31LlpRbnbXwG9RtAwZnSqc tX/CFtDHBlAfG8/f64RP5Vr0GVhyPr7WPnLBTBbhWoILQDxNzzAkRbhLOAzakNF86Lxqkg2TV pUnuN5oDyosaMprmCQbqgtYUkIK3pgna3v7ymLTNtewS9OMPaDmhzE= X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 9BDF0100014 X-Stat-Signature: 98bg5u9zsz1mdindzaoo6kacaepwd7da X-Rspam-User: X-HE-Tag: 1713297454-545512 X-HE-Meta: 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 zMs6pnqu WPybOxDK0eKv/ki6ci+yM3TDGe/T98xi6y8ZRs5EcvjgqXVlCjCbWDIT+0QjkueQin7uAH3fjmcSpevawgvLAfc71B2Xo4dSdcy0arIyYL9Qh0o3iB45C+iac8HM886ONZFdGWF4JpsShXU0I2EzApwfXF78CP3Kr709YwMpFyzFM5TcE5fEvl0QFw+Xw/AD+7aZ6OGVpyYZny9Wcto3x4lRfoXmpz8Eo/nbjxcaxN3Mm5x03zWZjNLpz374aONuU9QBY2NlTlEfNp//Sdv7bYbKqRVlk2R9RUj+rHuaDFa2cAfAnOeSea5QtpZkZWuGhCo6EHQuuQFHWNoQ= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: --spwgmais55ecsdks Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On 24/04/16 12:18PM, Andrew Morton wrote: > On Tue, 16 Apr 2024 14:19:24 +0200 Christian Heusel wrote: > > [ 218.738568] CPU: 0 PID: 167 Comm: guestfsd Not tainted 6.7.0-rc4-1-mainline-00158-gb5ba474f3f51 #1 bf39861cf50acae7a79c534e25532f28afe4e593^M > > (cc more zswap people) > > Fairly old kernel. We might have fixed it since then, but it would be > good to know what fixed this, for backporting reasons. Hey Andrew, I guess you must have missed the end of my previous mail, I have verified that the bug is still present with with the latest mainline release and bisected the issue down to a few commits. The trace I was posting above was just a random one from during the bisection. Sorry if my formatting was a bit confusing .. :) Cheers, Christian --spwgmais55ecsdks Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEb3ea3iR6a4oPcswTwEfU8yi1JYUFAmYe2CcACgkQwEfU8yi1 JYWu3g//XBsQJ0tXtI2lOeJhl6ka7DEcTV0Q0rACj5w3aKaxsHnaVmKAY353ERdS +FONEiz0KWk3UP9ie7+EsGVVcW6go1r8Wion4azXWTjp3SMMrlDg6+KqjJfjkvlZ 1BDy9+iPfbT5pZfLlW4rVYOTBcYdweA577NHzkBdI2t16FAJwCAlzHuV0vRkG/HZ Aq9X9HSizAYNdgc0NUPHcsXtxB45JZh9yFyo6eFO3qJyMik9HkK3JogqGMdSHw2R Z3liihM0eWpqCqkDrOJhg6OV68OD1KcYNhF/lKpBNboNjO2LNxQtkQisK+n1mdnt aXRXuuxhiThv2KWlSxnDDgNFPurCVil5mRVpEiOzoHrPNnB4lgoBYV8RR018kVol BVWFvnfR/mNN43XhgG82TOfdXMRg8xUWjvLC8ca8QrawtHwvNInCiB3C4Uey3VoU k0ZD+O8/wvNS1Y/Eomj0R3VcNKBghZJMRcvjgtwT5/rJC3GYeEc4djurEm0T9fnv rAvIQvyJgP0aGDl/SKxBHt8aVp07E9rSsxoebg7sIfVyGh515ja9hov/hhFIUwdc dAO/0LEM1BPXOLgHhY0XCcnJYR32HdFMubFWD97q5z5pacA7vRoLUhgbHTdYXiHW drxDaLwfRoegeFIGMhVOQx/44zIQ8vKiXCPthiKiV5zrv/WYprU= =K6Xl -----END PGP SIGNATURE----- --spwgmais55ecsdks--