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Wed, 06 Aug 2025 13:27:34 -0700 (PDT) Date: Wed, 06 Aug 2025 13:27:34 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6893bab6.a70a0220.7865.0007.GAE@google.com> Subject: [moderation/CI] Re: xsk: fix immature cq descriptor production From: syzbot ci To: syzkaller-upstream-moderation@googlegroups.com Cc: syzbot@lists.linux.dev Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v3] xsk: fix immature cq descriptor production https://lore.kernel.org/all/20250806154127.2161434-1-maciej.fijalkowski@intel.com * [PATCH v3 bpf] xsk: fix immature cq descriptor production and found the following issue: WARNING in xsk_create Full report is available here: https://ci.syzbot.org/series/ed9b41fb-c772-4c8d-ab6b-07919dac7f3f *** WARNING in xsk_create tree: bpf URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf.git base: e8d780dcd957d80725ad5dd00bab53b856429bc0 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/ac640846-151f-4c3e-8a63-10a1d56881e1/config syz repro: https://ci.syzbot.org/findings/34ebabe4-f302-4e4b-9951-0a44d704970a/syz_repro ------------[ cut here ]------------ kmem_cache of name 'xsk_generic_xmit_cache' already exists WARNING: CPU: 1 PID: 6031 at mm/slab_common.c:110 kmem_cache_sanity_check mm/slab_common.c:109 [inline] WARNING: CPU: 1 PID: 6031 at mm/slab_common.c:110 __kmem_cache_create_args+0xa3/0x320 mm/slab_common.c:307 Modules linked in: CPU: 1 UID: 0 PID: 6031 Comm: syz.2.21 Not tainted 6.16.0-syzkaller-06699-ge8d780dcd957-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:kmem_cache_sanity_check mm/slab_common.c:109 [inline] RIP: 0010:__kmem_cache_create_args+0xa3/0x320 mm/slab_common.c:307 Code: 81 fc 58 a5 22 8e 74 26 49 8b 7c 24 f8 48 89 de e8 32 81 67 09 85 c0 75 e2 90 48 c7 c7 f2 e1 98 8d 48 89 de e8 5e 00 7f ff 90 <0f> 0b 90 90 48 89 df be 20 00 00 00 e8 cc 82 67 09 48 85 c0 0f 85 RSP: 0018:ffffc90002dffcc8 EFLAGS: 00010246 RAX: 2d59588130194a00 RBX: ffffffff8cb69260 RCX: ffff888105d20000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000002 RBP: 0000000000000010 R08: ffffc90002dff9e7 R09: 1ffff920005bff3c R10: dffffc0000000000 R11: fffff520005bff3d R12: ffff88801fde6928 R13: 0000607e5bfbe4c0 R14: ffffc90002dffd60 R15: 0000000000000098 FS: 00007f455d4c26c0(0000) GS:ffff8881a3c7e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f455c7b7dac CR3: 0000000106b38000 CR4: 00000000000006f0 Call Trace: __kmem_cache_create include/linux/slab.h:353 [inline] xsk_create+0x67e/0x8d0 net/xdp/xsk.c:1817 __sock_create+0x4b3/0x9f0 net/socket.c:1589 sock_create net/socket.c:1647 [inline] __sys_socket_create net/socket.c:1684 [inline] __sys_socket+0xd7/0x1b0 net/socket.c:1731 __do_sys_socket net/socket.c:1745 [inline] __se_sys_socket net/socket.c:1743 [inline] __x64_sys_socket+0x7a/0x90 net/socket.c:1743 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f455c58ebe9 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:00007f455d4c2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f455c7b5fa0 RCX: 00007f455c58ebe9 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 000000000000002c RBP: 00007f455c611e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f455c7b6038 R14: 00007f455c7b5fa0 R15: 00007ffd678e28c8 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com. The email will later be sent to: [aleksander.lobakin@intel.com andrii@kernel.org ast@kernel.org bpf@vger.kernel.org daniel@iogearbox.net e.kubanski@partner.samsung.com maciej.fijalkowski@intel.com magnus.karlsson@intel.com netdev@vger.kernel.org] If the report looks fine to you, reply with: #syz upstream