From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D502A26F463 for ; Wed, 29 Oct 2025 07:01:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761721264; cv=none; b=J+R2Rnkz/lg1SPFafWrsR7RD9OyofLvNvPawiZ9AIf8wL8sKYXv5MjE82bTr6Jhe4y0hsUgS8AzAjTU4ja0Uyeo+VqW3ogCkpO5MWe2yeU4Mi2a0iepV/3c4TFxgGIQRrHFGh1np3XM2llqJyC2Pf8egYOzgyLRu3po2RxXuygo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761721264; c=relaxed/simple; bh=k1cukd7hbQXFTLWf0l4OLZDgi7dOOjKXqfolNpyt7uQ=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=pyzuxfK0MvLGurk93lJJVvW4mEblzvHFE8n136zYCi0caIOCf6ZMSYuJc1tRY71m0iPhIj4MK+aj+KcMoVYncG4jPCljEitemcJjJDQLkz1vlVueBgzJ6f+XbPFxBm4I7qoydm/57U5KpyAnM7mK96VTC88GRiBuf4Z8MrZ3uhw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.199 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f199.google.com with SMTP id e9e14a558f8ab-431d84fdb91so200677545ab.3 for ; Wed, 29 Oct 2025 00:01:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1761721262; x=1762326062; h=content-transfer-encoding:to:from:subject:message-id:in-reply-to :date:mime-version:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=kcrI9uNCC70IrglPKj0P6PuwObxX3vvMVlJlR7SDlk0=; b=nSNPx1GKAJTC05vwiUSJteUOAG+m7+7RxXnfBKsMs5iYtkFDQkNlj9jJ0dWN3cBo3l rFY/Bh5zYGa95qKQZ+C62xE3adQ8xITe8m2C0ipSSaSzcByQPBaD9d1z2OBeXuth7062 1gajGMeLeEQ5xSdCSCJzCfLhGmvcujWYYFZe2/TR/9vA96CmsG4ir07/i/ccKSCL036R 5uEZidvlWIAeFDNRQhrE7lc8J4ou68a3PPm3AJqknT9It5K/UMgG7AC80P3NEJ0fWCmI Jk01Ab0kgg1CPKhX2/zOtgkDYcQo4qrGpgygIaktNoEzoxrThqXGZgy5HVR2uAr/ZAnq U64w== X-Forwarded-Encrypted: i=1; AJvYcCW4TyI5tcAg54fQ2Q2tQleT+UgIxZOReplMGXdMmqCvZvx7mtM0AK0ufr3n+fsjE2zMYxmXvRqH5ToUKjo=@vger.kernel.org X-Gm-Message-State: AOJu0YyKMhQhcDr4GxtFHlnHgkJoCn0D+5LzAfn/DncE65PMp/Akj1Sp Ie4yhOhfk/+LJtJjXlfBrVo19Ya5RL0OAJtNQzbnhc6YcaY/iWcoMhRmJTmUIZ6yA5LN0Xwfzif n2RO5knw6J4WhG4+CmnRTzs/7H/V20/V0GXWOlWXh635KXF5+pQI8mHcl0QI= X-Google-Smtp-Source: AGHT+IGP2zMgnwCTd5mQkT4w6xaYo4KP+CdhVBbNypQKS77IuQgPaOTNJVWg5IIxqfo00veUfPrIGGuL8p7885hmjuonP53HweuQ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1805:b0:426:2f95:31a5 with SMTP id e9e14a558f8ab-432f9066ed8mr29192605ab.29.1761721262117; Wed, 29 Oct 2025 00:01:02 -0700 (PDT) Date: Wed, 29 Oct 2025 00:01:02 -0700 In-Reply-To: <20251029062151.JL5ts%dmantipov@yandex.ru> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6901bbae.050a0220.3344a1.0411.GAE@google.com> Subject: Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in ocfs2_claim_suballoc_bits From: syzbot To: dmantipov@yandex.ru, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Hello, syzbot tried to test the proposed patch but the build/boot failed: be fragmented on layer2 which could impact the performance. Setting the MT= U to 1560 would solve the problem. [ 50.603759][ T6071] batman_adv: batadv0: Not using interface batadv_slav= e_1 (retrying later): interface not active [ 50.628055][ T6071] device hsr_slave_0 entered promiscuous mode [ 50.634560][ T6071] device hsr_slave_1 entered promiscuous mode [ 50.690268][ T6071] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 50.700195][ T6071] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 50.709781][ T6071] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 50.722637][ T6071] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 50.757730][ T6071] 8021q: adding VLAN 0 to HW filter on device bond0 [ 50.772305][ T680] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes r= eady [ 50.781426][ T680] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes r= eady [ 50.789385][ T680] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes r= eady [ 50.801728][ T6071] 8021q: adding VLAN 0 to HW filter on device team0 [ 50.812600][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link= becomes ready [ 50.821807][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link = becomes ready [ 50.831543][ T495] bridge0: port 1(bridge_slave_0) entered blocking sta= te [ 50.838798][ T495] bridge0: port 1(bridge_slave_0) entered forwarding s= tate [ 50.847790][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes= ready [ 50.857308][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link= becomes ready [ 50.866275][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link = becomes ready [ 50.874998][ T495] bridge0: port 2(bridge_slave_1) entered blocking sta= te [ 50.882080][ T495] bridge0: port 2(bridge_slave_1) entered forwarding s= tate [ 50.908369][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link be= comes ready [ 50.917270][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link be= comes ready [ 50.926633][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link bec= omes ready [ 50.935710][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link bec= omes ready [ 50.945718][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes r= eady [ 50.954815][ T6071] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes re= ady [ 51.012168][ T843] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes = ready [ 51.020300][ T843] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes = ready [ 51.030927][ T6071] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 51.044963][ T843] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link= becomes ready [ 51.063818][ T843] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link beco= mes ready [ 51.073031][ T843] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes r= eady [ 51.080851][ T843] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes r= eady [ 51.090327][ T6071] device veth0_vlan entered promiscuous mode [ 51.100297][ T6071] device veth1_vlan entered promiscuous mode [ 51.115040][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link become= s ready [ 51.123244][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link become= s ready [ 51.131473][ T495] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link b= ecomes ready [ 51.141583][ T6071] device veth0_macvtap entered promiscuous mode [ 51.149837][ T6071] device veth1_macvtap entered promiscuous mode [ 51.162533][ T6071] batman_adv: batadv0: Interface activated: batadv_sla= ve_0 [ 51.170055][ T680] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link= becomes ready [ 51.179726][ T680] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link become= s ready [ 51.190174][ T6071] batman_adv: batadv0: Interface activated: batadv_sla= ve_1 [ 51.198081][ T680] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link= becomes ready [ 51.210537][ T6071] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 51.219647][ T6071] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 51.228883][ T6071] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 51.237581][ T6071] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 f= amily 0 port 6081 - 0 [ 51.286123][ C0] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D [ 51.295816][ C0] UBSAN: signed-integer-overflow in ./arch/x86/include= /asm/atomic.h:165:11 [ 51.304667][ C0] 1999955851 + 717459701 cannot be represented in type= 'int' [ 51.312050][ C0] CPU: 0 PID: 6087 Comm: modprobe Not tainted syzkalle= r #0 [ 51.319308][ C0] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 10/02/2025 [ 51.329714][ C0] Call Trace: [ 51.333454][ C0] [ 51.336393][ C0] dump_stack+0xfd/0x16e [ 51.340707][ C0] ubsan_epilogue+0xa/0x30 [ 51.345100][ C0] handle_overflow+0x192/0x1b0 [ 51.350225][ C0] ? prandom_u32+0x1d/0x1f0 [ 51.354817][ C0] ip_idents_reserve+0x14a/0x170 [ 51.359753][ C0] __ip_select_ident+0xe4/0x1c0 [ 51.364781][ C0] iptunnel_xmit+0x466/0x7b0 [ 51.369445][ C0] udp_tunnel_xmit_skb+0x1ba/0x290 [ 51.374631][ C0] geneve_xmit+0x1d05/0x2140 [ 51.379381][ C0] dev_hard_start_xmit+0x294/0x780 [ 51.384692][ C0] __dev_queue_xmit+0x1678/0x28b0 [ 51.390007][ C0] ip6_finish_output2+0x1020/0x1490 [ 51.395956][ C0] NF_HOOK+0x45/0x2c0 [ 51.400108][ C0] ? NF_HOOK+0x2c0/0x2c0 [ 51.404792][ C0] mld_sendpack+0x5f9/0xa70 [ 51.409535][ C0] mld_ifc_timer_expire+0x7e1/0x990 [ 51.415000][ C0] ? lock_acquire+0x78/0x310 [ 51.419746][ C0] ? lock_release+0x69/0x610 [ 51.424991][ C0] ? debug_object_deactivate+0x9b/0x250 [ 51.430534][ C0] ? mld_gq_timer_expire+0xe0/0xe0 [ 51.435630][ C0] call_timer_fn+0x105/0x440 [ 51.440234][ C0] ? mld_gq_timer_expire+0xe0/0xe0 [ 51.445680][ C0] __run_timers+0x5d8/0x7a0 [ 51.450943][ C0] ? __do_softirq+0x164/0x8ae [ 51.455910][ C0] run_timer_softirq+0x19/0x30 [ 51.460883][ C0] __do_softirq+0x23c/0x8ae [ 51.465518][ C0] ? asm_call_irq_on_stack+0xf/0x20 [ 51.471090][ C0] asm_call_irq_on_stack+0xf/0x20 [ 51.476189][ C0] [ 51.479317][ C0] do_softirq_own_stack+0x6d/0xb0 [ 51.484818][ C0] __irq_exit_rcu+0x1e1/0x1f0 [ 51.489844][ C0] irq_exit_rcu+0x5/0x20 [ 51.494403][ C0] sysvec_apic_timer_interrupt+0x9d/0xb0 [ 51.500226][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 51.506392][ C0] RIP: 0010:find_next_bit+0x4d/0x100 [ 51.512330][ C0] Code: 49 39 de 0f 83 c9 00 00 00 49 bd 00 00 00 00 0= 0 fc ff df 4c 89 f0 48 c1 e8 06 4d 8d 24 c7 4c 89 e0 48 c1 e8 03 42 80 3c 2= 8 00 <74> 08 4c 89 e7 e8 69 40 2b fe 4d 8b 24 24 44 89 f1 49 d3 ec 49 d3 [ 51.532540][ C0] RSP: 0000:ffffc9000197fb88 EFLAGS: 00000246 [ 51.539059][ C0] RAX: 1ffff1100369cd09 RBX: 0000000000000008 RCX: fff= f88802a750000 [ 51.548074][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 000= 0000000000000 [ 51.557334][ C0] RBP: 00007fbce0785000 R08: dffffc0000000000 R09: fff= ffbfff1843df6 [ 51.565473][ C0] R10: fffffbfff1843df6 R11: 1ffffffff1843df5 R12: fff= f88801b4e6848 [ 51.573525][ C0] R13: dffffc0000000000 R14: 0000000000000000 R15: fff= f88801b4e6848 [ 51.581589][ C0] ? find_next_bit+0x23/0x100 [ 51.586345][ C0] ? cpumask_any_but+0x34/0x240 [ 51.591189][ C0] cpumask_any_but+0x4f/0x240 [ 51.596049][ C0] ? flush_tlb_mm_range+0x201/0x380 [ 51.601359][ C0] flush_tlb_mm_range+0x215/0x380 [ 51.606382][ C0] ptep_clear_flush+0x112/0x150 [ 51.611245][ C0] wp_page_copy+0x9d6/0x1460 [ 51.616083][ C0] handle_mm_fault+0xe2f/0x2930 [ 51.620923][ C0] ? lock_acquire+0x78/0x310 [ 51.625527][ C0] do_user_addr_fault+0x468/0xa50 [ 51.630531][ C0] ? asm_exc_page_fault+0x8/0x30 [ 51.635455][ C0] exc_page_fault+0x67/0x100 [ 51.640033][ C0] asm_exc_page_fault+0x1e/0x30 [ 51.644957][ C0] RIP: 0033:0x7fbce0a8d418 [ 51.649464][ C0] Code: fe ff ff 0f 1f 80 00 00 00 00 48 85 f6 0f 84 a= f 00 00 00 41 f6 85 56 03 00 00 20 0f 85 a1 00 00 00 49 8b 45 60 48 85 c0 7= 4 04 <48> 01 70 08 49 8b 45 58 48 85 c0 74 04 48 01 70 08 49 8b 45 68 48 [ 51.669510][ C0] RSP: 002b:00007fff1b7ea470 EFLAGS: 00010206 [ 51.675853][ C0] RAX: 00007fbce0784e48 RBX: 0000000000000030 RCX: 000= 07fbce0787100 [ 51.684075][ C0] RDX: 00007fbce0784f78 RSI: 00007fbce077d000 RDI: 000= 000006fffffff [ 51.692270][ C0] RBP: 00007fff1b7ea5c0 R08: 0000000000000006 R09: 000= 00000effffef5 [ 51.700403][ C0] R10: 0000000070000029 R11: 00007fff1b7ea6a8 R12: 000= 07fff1b7ea320 [ 51.708359][ C0] R13: 00007fbce07870c0 R14: 00007fff1b7ea660 R15: 000= 07fbce0786000 [ 51.716524][ C0] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D [ 51.726370][ C0] Kernel panic - not syncing: UBSAN: panic_on_warn set= ... [ 51.733553][ C0] CPU: 0 PID: 6087 Comm: modprobe Not tainted syzkalle= r #0 [ 51.741165][ C0] Hardware name: Google Google Compute Engine/Google C= ompute Engine, BIOS Google 10/02/2025 [ 51.751296][ C0] Call Trace: [ 51.754602][ C0] [ 51.757794][ C0] dump_stack+0xfd/0x16e [ 51.762149][ C0] panic+0x2f0/0x9c0 [ 51.766043][ C0] check_panic_on_warn+0x95/0xe0 [ 51.771275][ C0] handle_overflow+0x192/0x1b0 [ 51.776058][ C0] ? prandom_u32+0x1d/0x1f0 [ 51.780668][ C0] ip_idents_reserve+0x14a/0x170 [ 51.785686][ C0] __ip_select_ident+0xe4/0x1c0 [ 51.790861][ C0] iptunnel_xmit+0x466/0x7b0 [ 51.795429][ C0] udp_tunnel_xmit_skb+0x1ba/0x290 [ 51.800528][ C0] geneve_xmit+0x1d05/0x2140 [ 51.805139][ C0] dev_hard_start_xmit+0x294/0x780 [ 51.810503][ C0] __dev_queue_xmit+0x1678/0x28b0 [ 51.815601][ C0] ip6_finish_output2+0x1020/0x1490 [ 51.820885][ C0] NF_HOOK+0x45/0x2c0 [ 51.825036][ C0] ? NF_HOOK+0x2c0/0x2c0 [ 51.829388][ C0] mld_sendpack+0x5f9/0xa70 [ 51.833972][ C0] mld_ifc_timer_expire+0x7e1/0x990 [ 51.839158][ C0] ? lock_acquire+0x78/0x310 [ 51.843815][ C0] ? lock_release+0x69/0x610 [ 51.848385][ C0] ? debug_object_deactivate+0x9b/0x250 [ 51.854001][ C0] ? mld_gq_timer_expire+0xe0/0xe0 [ 51.859287][ C0] call_timer_fn+0x105/0x440 [ 51.863873][ C0] ? mld_gq_timer_expire+0xe0/0xe0 [ 51.869096][ C0] __run_timers+0x5d8/0x7a0 [ 51.873677][ C0] ? __do_softirq+0x164/0x8ae [ 51.878688][ C0] run_timer_softirq+0x19/0x30 [ 51.883527][ C0] __do_softirq+0x23c/0x8ae [ 51.888285][ C0] ? asm_call_irq_on_stack+0xf/0x20 [ 51.893620][ C0] asm_call_irq_on_stack+0xf/0x20 [ 51.898854][ C0] [ 51.901776][ C0] do_softirq_own_stack+0x6d/0xb0 [ 51.907074][ C0] __irq_exit_rcu+0x1e1/0x1f0 [ 51.911821][ C0] irq_exit_rcu+0x5/0x20 [ 51.916139][ C0] sysvec_apic_timer_interrupt+0x9d/0xb0 [ 51.922175][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 51.928546][ C0] RIP: 0010:find_next_bit+0x4d/0x100 [ 51.934285][ C0] Code: 49 39 de 0f 83 c9 00 00 00 49 bd 00 00 00 00 0= 0 fc ff df 4c 89 f0 48 c1 e8 06 4d 8d 24 c7 4c 89 e0 48 c1 e8 03 42 80 3c 2= 8 00 <74> 08 4c 89 e7 e8 69 40 2b fe 4d 8b 24 24 44 89 f1 49 d3 ec 49 d3 [ 51.954297][ C0] RSP: 0000:ffffc9000197fb88 EFLAGS: 00000246 [ 51.961947][ C0] RAX: 1ffff1100369cd09 RBX: 0000000000000008 RCX: fff= f88802a750000 [ 51.970379][ C0] RDX: 0000000000000000 RSI: 0000000000000008 RDI: 000= 0000000000000 [ 51.978484][ C0] RBP: 00007fbce0785000 R08: dffffc0000000000 R09: fff= ffbfff1843df6 [ 51.987016][ C0] R10: fffffbfff1843df6 R11: 1ffffffff1843df5 R12: fff= f88801b4e6848 [ 51.995520][ C0] R13: dffffc0000000000 R14: 0000000000000000 R15: fff= f88801b4e6848 [ 52.003868][ C0] ? find_next_bit+0x23/0x100 [ 52.008862][ C0] ? cpumask_any_but+0x34/0x240 [ 52.014719][ C0] cpumask_any_but+0x4f/0x240 [ 52.020280][ C0] ? flush_tlb_mm_range+0x201/0x380 [ 52.026063][ C0] flush_tlb_mm_range+0x215/0x380 [ 52.032125][ C0] ptep_clear_flush+0x112/0x150 [ 52.037062][ C0] wp_page_copy+0x9d6/0x1460 [ 52.041758][ C0] handle_mm_fault+0xe2f/0x2930 [ 52.046829][ C0] ? lock_acquire+0x78/0x310 [ 52.051409][ C0] do_user_addr_fault+0x468/0xa50 [ 52.056512][ C0] ? asm_exc_page_fault+0x8/0x30 [ 52.061484][ C0] exc_page_fault+0x67/0x100 [ 52.066226][ C0] asm_exc_page_fault+0x1e/0x30 [ 52.071050][ C0] RIP: 0033:0x7fbce0a8d418 [ 52.075555][ C0] Code: fe ff ff 0f 1f 80 00 00 00 00 48 85 f6 0f 84 a= f 00 00 00 41 f6 85 56 03 00 00 20 0f 85 a1 00 00 00 49 8b 45 60 48 85 c0 7= 4 04 <48> 01 70 08 49 8b 45 58 48 85 c0 74 04 48 01 70 08 49 8b 45 68 48 [ 52.095670][ C0] RSP: 002b:00007fff1b7ea470 EFLAGS: 00010206 [ 52.101714][ C0] RAX: 00007fbce0784e48 RBX: 0000000000000030 RCX: 000= 07fbce0787100 [ 52.109674][ C0] RDX: 00007fbce0784f78 RSI: 00007fbce077d000 RDI: 000= 000006fffffff [ 52.117882][ C0] RBP: 00007fff1b7ea5c0 R08: 0000000000000006 R09: 000= 00000effffef5 [ 52.126099][ C0] R10: 0000000070000029 R11: 00007fff1b7ea6a8 R12: 000= 07fff1b7ea320 [ 52.134305][ C0] R13: 00007fbce07870c0 R14: 00007fff1b7ea660 R15: 000= 07fbce0786000 [ 52.142669][ C0] Kernel Offset: disabled [ 52.147032][ C0] Rebooting in 86400 seconds.. syzkaller build log: go env (err=3D) AR=3D'ar' CC=3D'gcc' CGO_CFLAGS=3D'-O2 -g' CGO_CPPFLAGS=3D'' CGO_CXXFLAGS=3D'-O2 -g' CGO_ENABLED=3D'1' CGO_FFLAGS=3D'-O2 -g' CGO_LDFLAGS=3D'-O2 -g' CXX=3D'g++' GCCGO=3D'gccgo' GO111MODULE=3D'auto' GOAMD64=3D'v1' GOARCH=3D'amd64' GOAUTH=3D'netrc' GOBIN=3D'' GOCACHE=3D'/syzkaller/.cache/go-build' GOCACHEPROG=3D'' GODEBUG=3D'' GOENV=3D'/syzkaller/.config/go/env' GOEXE=3D'' GOEXPERIMENT=3D'' GOFIPS140=3D'off' GOFLAGS=3D'' GOGCCFLAGS=3D'-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=3D0= -ffile-prefix-map=3D/tmp/go-build2982762739=3D/tmp/go-build -gno-record-gc= c-switches' GOHOSTARCH=3D'amd64' GOHOSTOS=3D'linux' GOINSECURE=3D'' GOMOD=3D'/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.= mod' GOMODCACHE=3D'/syzkaller/jobs-2/linux/gopath/pkg/mod' GONOPROXY=3D'' GONOSUMDB=3D'' GOOS=3D'linux' GOPATH=3D'/syzkaller/jobs-2/linux/gopath' GOPRIVATE=3D'' GOPROXY=3D'https://proxy.golang.org,direct' GOROOT=3D'/usr/local/go' GOSUMDB=3D'sum.golang.org' GOTELEMETRY=3D'local' GOTELEMETRYDIR=3D'/syzkaller/.config/go/telemetry' GOTMPDIR=3D'' GOTOOLCHAIN=3D'auto' GOTOOLDIR=3D'/usr/local/go/pkg/tool/linux_amd64' GOVCS=3D'' GOVERSION=3D'go1.24.4' GOWORK=3D'' PKG_CONFIG=3D'pkg-config' git status (err=3D) HEAD detached at 7368264b463 nothing to commit, working tree clean tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contribut= ing.md#using-syz-env go list -f '{{.Stale}}' ./sys/syz-sysgen | grep -q false || go install ./sy= s/syz-sysgen make .descriptions tput: No value for $TERM and no -T specified tput: No value for $TERM and no -T specified Makefile:31: run command via tools/syz-env for best compatibility, see: Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contribut= ing.md#using-syz-env bin/syz-sysgen touch .descriptions GOOS=3Dlinux GOARCH=3Damd64 go build -ldflags=3D"-s -w -X github.com/google= /syzkaller/prog.GitRevision=3D7368264b463a401571d2eb381f50ea2a758e9d05 -X g= ithub.com/google/syzkaller/prog.gitRevisionDate=3D20250801-160258" -o ./bi= n/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog mkdir -p ./bin/linux_amd64 g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \ -m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wfr= ame-larger-than=3D16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-forma= t-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -= static-pie -std=3Dc++17 -I. -Iexecutor/_include -DGOOS_linux=3D1 -DGOARCH= _amd64=3D1 \ -DHOSTGOOS_linux=3D1 -DGIT_REVISION=3D\"7368264b463a401571d2eb381f50ea2a75= 8e9d05\" /usr/bin/ld: /tmp/ccSiEudZ.o: in function `Connection::Connect(char const*,= char const*)': executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEP= KcS1_]+0x104): warning: Using 'gethostbyname' in statically linked applicat= ions requires at runtime the shared libraries from the glibc version used f= or linking Error text is too large and was truncated, full error text is at: https://syzkaller.appspot.com/x/error.txt?x=3D14449c92580000 Tested on: commit: d3d0b4e2 Linux 5.10.245 git tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linu= x.git linux-5.10.y kernel config: https://syzkaller.appspot.com/x/.config?x=3D39182a54870857e= b dashboard link: https://syzkaller.appspot.com/bug?extid=3D5054473a31f78f735= 416 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-= 1~exp1~20250708183702.136), Debian LLD 20.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=3D145b67045800= 00