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AJvYcCWprbHeEBl5PAZmqnA3TllcfbCyddFccD7ZO6XbKGBuHS8aQxBhAqAnEmFkmCiGvbyo6lu+mpwFbQFXc3Sgq7471xMMYg==@lists.linux.dev X-Gm-Message-State: AOJu0YwXh0WTLM6nolmD/xM4Athfl9lLp/zTMF1sUG++wNEEepIc/JyK EEzDUbEZr+Num52QkbCZ0PvBWyDYJsRzwCreJLrHZw42Gd5kAsi72kyNev6bw56M99pnAKCWg2W Pzk6rnkYOKM2oXJPaY1I6eHXQOB722GFhwx4wpis8KwrRG8eyAjAIQxZsc/Q= X-Google-Smtp-Source: AGHT+IEd/oncA/FTQ3xxathOMJeMCYJEWzy4cGnbIk3x3fjeiD+6SI5m7RkWUytuXSqiwf2BFl3ZqdfXSsjZbKz6mJfmz5DmDXci Precedence: bulk X-Mailing-List: linux-kernel-mentees@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:2d94:b0:87c:4609:d10a with SMTP id ca18e2360f4ac-87c4609d9c6mr1354451639f.9.1753202431060; Tue, 22 Jul 2025 09:40:31 -0700 (PDT) Date: Tue, 22 Jul 2025 09:40:31 -0700 Reply-To: <20250722071508.12497-1-suchitkarunakaran@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <687fbeff.a70a0220.21b99c.0011.GAE@google.com> Subject: [syzbot ci] Re: net: Revert tx queue length on partial failure in dev_qdisc_change_tx_queue_len() From: syzbot ci To: aleksander.lobakin@intel.com, davem@davemloft.net, edumazet@google.com, horms@kernel.org, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, kuniyu@google.com, linux-kernel-mentees@lists.linux.dev, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, sdf@fomichev.me, skhan@linuxfoundation.org, suchitkarunakaran@gmail.com, xiyou.wangcong@gmail.com Cc: syzbot@lists.linux.dev Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] net: Revert tx queue length on partial failure in dev_qdisc_change_tx_queue_len() https://lore.kernel.org/all/<20250722071508.12497-1-suchitkarunakaran@gmail.com> * [PATCH] net: Revert tx queue length on partial failure in dev_qdisc_change_tx_queue_len() and found the following issue: BUG: unable to handle kernel paging request in dev_qdisc_change_tx_queue_len Full report is available here: https://ci.syzbot.org/series/75b0a15e-cca4-4e46-8bf9-595c0dd34915 *** BUG: unable to handle kernel paging request in dev_qdisc_change_tx_queue_len tree: netdev URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/netdev/net.git base: 81e0db8e839822b8380ce4716cd564a593ccbfc5 arch: amd64 compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7 config: https://ci.syzbot.org/builds/2ee305f2-ddb8-45c6-8f47-2a150dc6dd22/config syz repro: https://ci.syzbot.org/findings/1e75a6d3-11ac-48da-af27-60753abb61c7/syz_repro netlink: 'syz.2.18': attribute type 13 has an invalid length. netlink: 'syz.2.18': attribute type 17 has an invalid length. BUG: unable to handle page fault for address: ffffed4821fa6a4b #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 13ffee067 P4D 13ffee067 PUD 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 5980 Comm: syz.2.18 Not tainted 6.16.0-rc6-syzkaller-00128-g81e0db8e8398-dirty #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:dev_qdisc_change_tx_queue_len+0x542/0x640 Code: be 7f 05 00 00 48 c7 c2 20 d2 95 8c e8 27 db 27 f8 44 89 e0 48 69 c0 c0 01 00 00 49 8d 1c 06 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 1f af ab f8 48 8b 1b 4c 8d 73 18 RSP: 0018:ffffc900024beaa0 EFLAGS: 00010a06 RAX: 1ffff14821fa6a4b RBX: ffff8a410fd35258 RCX: ffff888020f2d640 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900024beb90 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade R10: dffffc0000000000 R11: fffffbfff1f43adf R12: 00000000ffffffff R13: dffffc0000000000 R14: ffff88810fd35400 R15: ffff88810ffe2018 FS: 00007fa854ede6c0(0000) GS:ffff8881a3c23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed4821fa6a4b CR3: 00000000295fa000 CR4: 00000000000006f0 Call Trace: netif_change_tx_queue_len+0x167/0x270 do_setlink+0xdfb/0x41c0 rtnl_newlink+0x149f/0x1c70 rtnetlink_rcv_msg+0x7cf/0xb70 netlink_rcv_skb+0x208/0x470 netlink_unicast+0x75c/0x8e0 netlink_sendmsg+0x805/0xb30 __sock_sendmsg+0x21c/0x270 ____sys_sendmsg+0x505/0x830 ___sys_sendmsg+0x21f/0x2a0 __x64_sys_sendmsg+0x19b/0x260 do_syscall_64+0xfa/0x3b0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa853f8e9a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa854ede038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fa8541b5fa0 RCX: 00007fa853f8e9a9 RDX: 0000000000000000 RSI: 0000200000000180 RDI: 0000000000000003 RBP: 00007fa854010d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fa8541b5fa0 R15: 00007ffe5a5f8288 Modules linked in: CR2: ffffed4821fa6a4b ---[ end trace 0000000000000000 ]--- RIP: 0010:dev_qdisc_change_tx_queue_len+0x542/0x640 Code: be 7f 05 00 00 48 c7 c2 20 d2 95 8c e8 27 db 27 f8 44 89 e0 48 69 c0 c0 01 00 00 49 8d 1c 06 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 1f af ab f8 48 8b 1b 4c 8d 73 18 RSP: 0018:ffffc900024beaa0 EFLAGS: 00010a06 RAX: 1ffff14821fa6a4b RBX: ffff8a410fd35258 RCX: ffff888020f2d640 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc900024beb90 R08: ffffffff8fa1d6f7 R09: 1ffffffff1f43ade R10: dffffc0000000000 R11: fffffbfff1f43adf R12: 00000000ffffffff R13: dffffc0000000000 R14: ffff88810fd35400 R15: ffff88810ffe2018 FS: 00007fa854ede6c0(0000) GS:ffff8881a3c23000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffed4821fa6a4b CR3: 00000000295fa000 CR4: 00000000000006f0 --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com.