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Thu, 30 Apr 2026 10:17:20 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 066/AjAs82kacwAAD6G6ig (envelope-from ) for ; Thu, 30 Apr 2026 10:17:20 +0000 Date: Thu, 30 Apr 2026 12:17:15 +0200 From: Thomas Bogendoerfer To: netdev@vger.kernel.org Subject: BUG: KASAN: slab-out-of-bounds in ice_start_xmit+0x57cc/0x5ef0 [ice] Message-ID: <20260430121715.2d306d73@samweis> X-Mailer: Claws Mail 4.4.0 (GTK 3.24.43; x86_64-suse-linux-gnu) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Spamd-Result: default: False [-4.01 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_RHS_NOT_FQDN(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,suse.de:dkim]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; MIME_TRACE(0.00)[0:+]; RCPT_COUNT_ONE(0.00)[1]; URIBL_BLOCKED(0.00)[suse.de:dkim,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[netdev@vger.kernel.org]; DKIM_TRACE(0.00)[suse.de:+] X-Rspamd-Action: no action X-Spam-Flag: NO X-Spam-Score: -4.01 X-Spam-Level: X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Rspamd-Queue-Id: 2A8106A803 While working on another ice issue, I've noticed a KASAN splat, when using xskxceiver test program. This is caused by eth =3D (struct ethhdr *)skb_mac_header(skb); ... eth->h_proto =3D=3D htons(ETH_P_LLDP)) && in ice_xmit_frame_ring(). It would be easy to check for the unset mac_header condition in ice driver (there are other drivers using skb_mac_header() in .ndo_start_xmit). But since __dev_queue_xmit() is doing a skb_reset_mac_header(), shouldn't __dev_direct_xmit() do the same ? Thomas. --=20 SUSE Software Solutions Germany GmbH__dev_queue_xmit HRB 36809 (AG N=C3=BCrnberg) Gesch=C3=A4ftsf=C3=BChrer: Jochen Jaser, Andrew McDonald, Werner Knoblich