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AKwUvBzKIGoADYpLPqscVCmL+Q36ULo5XH0xdnLEq/nNWvrg0ZgagdC0UzD6OzD0sANcAykY7Vqv4bE=@vger.kernel.org X-Gm-Message-State: AFq9FYLTMZ675vw1Zwjb2H3aQQIebv40svdHrgfOllBzxhM5+p2J38lQ ct74lUVc83ib8u0UhTXrwmD+FVQL/Lja3/vXNraMpbuzzWzjOkYBxvxtj2gB9L+dcHxRm5qVbuv a9F3CFyDDUrjKARnQl2wVEOre8SCToQPjc0BzWzTBDA2zjITzdxHnuQOpiXY= Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:1823:b0:4f3:e98f:fa1d with SMTP id 5614622812f47-53cc5b5ba97mr2414087b6e.9.1792233804872; Sat, 17 Oct 2026 03:43:24 -0700 (PDT) Date: Sat, 17 Oct 2026 03:43:24 -0700 In-Reply-To: <6aa95fe1.a211d2ce.1a5198.02af.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ad3514c.6814cce4.34c49f.0057.GAE@google.com> Subject: Re: [syzbot] [arm?] BUG: workqueue lockup in batadv_tt_purge From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, edumazet@kernel.org, fw@strlen.de, herbert@gondor.apana.org.au, horms@kernel.org, idosch@nvidia.com, kuba@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, netfilter-devel@vger.kernel.org, pabeni@redhat.com, pablo@netfilter.org, steffen.klassert@secunet.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable syzbot has found a reproducer for the following issue on: HEAD commit: 7a19f0cc94ad Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.g= it for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=3D16fb34e1580000 kernel config: https://syzkaller.appspot.com/x/.config?x=3D26d6221a572842a= c dashboard link: https://syzkaller.appspot.com/bug?extid=3D61b202fdc410840f0= 198 compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=3D11329bd158000= 0 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/296cd4b77dbf/disk-= 7a19f0cc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e57669ed895f/vmlinux-= 7a19f0cc.xz kernel image: https://storage.googleapis.com/syzbot-assets/c679c1ad76d4/Ima= ge-7a19f0cc.gz.xz IMPORTANT: if you fix the issue, please add the following tag to the commit= : Reported-by: syzbot+61b202fdc410840f0198@syzkaller.appspotmail.com bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) BUG: workqueue lockup - pool cpus=3D1 node=3D0 flags=3D0x0 nice=3D-20 stuck= for 32s! Showing busy workqueues and worker pools: workqueue events: flags=3D0x100 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D9 refcnt=3D10 pending: free_ipc, rht_deferred_worker, 2*nsim_dev_hwstats_traffic_work= , vmstat_shepherd, 2*psi_avgs_work, 2*ovs_dp_masks_rebalance pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D11 refcnt=3D12 in-flight: 1503:request_firmware_work_func for 147s pending: 3*nsim_dev_hwstats_traffic_work, 2*psi_avgs_work, drm_fb_helpe= r_damage_work, 4*ovs_dp_masks_rebalance workqueue events_unbound: flags=3D0x2 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D9 refcnt=3D10 in-flight: 5092:call_usermodehelper_exec_work for 84s ,13:nsim_dev_trap= _report_work for 17s ,5097:nsim_dev_trap_report_work for 5s ,196:cfg80211_w= iphy_work for 25s pending: 2*nsim_dev_trap_report_work, flush_memcg_stats_dwork, toggle_a= llocation_gate, nsim_dev_trap_report_work pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D13 refcnt=3D14 in-flight: 5096:cfg80211_wiphy_work for 85s cfg80211_wiphy_work ,5095:c= fg80211_wiphy_work for 90s cfg80211_wiphy_work ,49:cfg80211_wiphy_work for = 93s cfg80211_wiphy_work ,61:cfg80211_wiphy_work for 94s cfg80211_wiphy_work= ,12:linkwatch_event for 93s ,1428:cfg80211_wiphy_work for 93s cfg80211_wip= hy_work ,1214:cfg80211_wiphy_work for 91s cfg80211_wiphy_work workqueue events_power_efficient: flags=3D0x82 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D6 refcnt=3D7 in-flight: 1187:neigh_periodic_work for 2s pending: 2*neigh_managed_work, fb_flashcursor, gc_worker, wg_ratelimite= r_gc_entries workqueue events_dfl_long: flags=3D0x2 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D6 refcnt=3D7 pending: 6*defense_work_handler workqueue rcu_gp: flags=3D0x108 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D4 MAYDA= Y pending: process_srcu workqueue mm_percpu_wq: flags=3D0x108 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D3 MAYDA= Y pending: vmstat_update pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D4 MAYDA= Y pending: mayday_cursor_func, vmstat_update workqueue writeback: flags=3D0x4a pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D3 MAYDAY pending: wb_workfn workqueue kblockd: flags=3D0x118 pwq 7: cpus=3D1 node=3D0 flags=3D0x0 nice=3D-20 active=3D1 refcnt=3D2 pending: blk_mq_timeout_work workqueue mld: flags=3D0x40108 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D4 MAYDA= Y pending: mld_ifc_work inactive: mld_ifc_work pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D97 MAYD= AY in-flight: 2824(RESCUER):mld_ifc_work for 2s pending: mayday_cursor_func inactive: 3*mld_ifc_work, mld_dad_work, 5*mld_ifc_work, mld_dad_work, 5= *mld_ifc_work, mld_dad_work, 2*mld_ifc_work, mld_dad_work, 5*mld_ifc_work, = mld_dad_work, 10*mld_ifc_work, mld_dad_work, 3*mld_ifc_work, mld_dad_work, = 4*mld_ifc_work, 3*mld_dad_work, mld_ifc_work, mld_dad_work, 6*mld_ifc_work,= mld_dad_work, 5*mld_ifc_work, mld_dad_work, 11*mld_ifc_work, mld_dad_work,= 4*mld_ifc_work, mld_dad_work, 5*mld_ifc_work, 2*mld_dad_work, 4*mld_ifc_wo= rk, 2*mld_dad_work, mld_ifc_work workqueue ipv6_addrconf: flags=3D0x6000a pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D386 in-flight: 40:addrconf_dad_work for 94s inactive: 382*addrconf_dad_work workqueue bat_events: flags=3D0x6000a pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D40 MAYDAY in-flight: 2857(RESCUER):batadv_tt_purge for 0s pending: mayday_cursor_func inactive: 3*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_purge_o= rig, 2*batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, 6*bata= dv_iv_send_outstanding_bat_ogm_packet, 3*batadv_mcast_mla_update, 2*batadv_= dat_purge, 2*batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodi= c_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batad= v_bla_periodic_work, batadv_tt_purge, 2*batadv_mcast_mla_update, 2*batadv_p= urge_orig, 2*batadv_tt_purge workqueue wg-kex-wg0: flags=3D0x124 pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 in-flight: 4784:wg_packet_handshake_receive_worker for 47s workqueue wg-crypt-wg0: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D3 MAYDA= Y pending: wg_packet_encrypt_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D5 MAYDA= Y pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg1: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D3 MAYDA= Y pending: wg_packet_decrypt_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D5 MAYDA= Y pending: mayday_cursor_func, wg_packet_decrypt_worker, wg_packet_tx_wor= ker workqueue wg-kex-wg2: flags=3D0x124 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 in-flight: 5067:wg_packet_handshake_receive_worker for 30s pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 in-flight: 5074:wg_packet_handshake_receive_worker for 41s workqueue wg-kex-wg2: flags=3D0x6 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg2: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D4 MAYDA= Y pending: wg_packet_encrypt_worker, wg_packet_tx_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D3 refcnt=3D6 MAYDA= Y pending: wg_packet_tx_worker, wg_packet_encrypt_worker, wg_packet_decry= pt_worker workqueue wg-kex-wg0: flags=3D0x124 pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg0: flags=3D0x6 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg0: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D4 MAYDA= Y pending: wg_packet_tx_worker, wg_packet_encrypt_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D3 refcnt=3D6 MAYDA= Y pending: wg_packet_decrypt_worker, wg_packet_tx_worker, wg_packet_encry= pt_worker workqueue wg-kex-wg1: flags=3D0x124 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg1: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D4 MAYDA= Y pending: wg_packet_tx_worker, wg_packet_encrypt_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D3 refcnt=3D6 MAYDA= Y pending: mayday_cursor_func, wg_packet_decrypt_worker, wg_packet_encryp= t_worker, wg_packet_tx_worker workqueue wg-kex-wg2: flags=3D0x124 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 in-flight: 866:wg_packet_handshake_receive_worker for 31s pending: wg_packet_handshake_receive_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 in-flight: 24:wg_packet_handshake_receive_worker for 44s pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg0: flags=3D0x124 pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg0: flags=3D0x6 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg0: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D3 MAYDA= Y pending: wg_packet_tx_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D3 refcnt=3D6 MAYDA= Y pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker, wg_packet_= tx_worker workqueue wg-kex-wg1: flags=3D0x124 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 in-flight: 4794:wg_packet_handshake_receive_worker for 67s wg_packet_ha= ndshake_receive_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 in-flight: 4833:wg_packet_handshake_receive_worker for 47s pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=3D0x6 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg1: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D4 MAYDA= Y pending: wg_packet_decrypt_worker, wg_packet_tx_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D3 refcnt=3D6 MAYDA= Y pending: wg_packet_tx_worker, wg_packet_encrypt_worker, wg_packet_decry= pt_worker workqueue wg-kex-wg2: flags=3D0x124 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 in-flight: 5091:wg_packet_handshake_receive_worker for 22s pending: wg_packet_handshake_receive_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 in-flight: 4847:wg_packet_handshake_receive_worker for 41s pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg2: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D5 MAYDA= Y in-flight: 10:wg_packet_decrypt_worker for 1s pending: wg_packet_encrypt_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D4 MAYDA= Y pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker workqueue wg-kex-wg0: flags=3D0x124 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 in-flight: 4955:wg_packet_handshake_receive_worker for 5s pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg0: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D3 MAYDA= Y pending: wg_packet_encrypt_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D3 refcnt=3D6 MAYDA= Y pending: wg_packet_decrypt_worker, wg_packet_tx_worker, wg_packet_encry= pt_worker workqueue wg-kex-wg1: flags=3D0x124 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg1: flags=3D0x6 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg1: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D3 refcnt=3D5 MAYDA= Y pending: wg_packet_decrypt_worker, wg_packet_tx_worker, wg_packet_encry= pt_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D3 refcnt=3D6 MAYDA= Y pending: wg_packet_tx_worker, wg_packet_encrypt_worker, wg_packet_decry= pt_worker workqueue wg-kex-wg2: flags=3D0x124 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 in-flight: 9:wg_packet_handshake_receive_worker for 31s wg_packet_hands= hake_receive_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D3 in-flight: 26:wg_packet_handshake_receive_worker for 47s pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg2: flags=3D0x6 pwq 8: cpus=3D0-1 flags=3D0x6 nice=3D0 active=3D1 refcnt=3D2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg2: flags=3D0x128 pwq 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 active=3D1 refcnt=3D4 MAYDA= Y pending: wg_packet_decrypt_worker pwq 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 active=3D2 refcnt=3D4 MAYDA= Y pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker pool 2: cpus=3D0 node=3D0 flags=3D0x2 nice=3D0 hung=3D1s workers=3D8 manage= r: 5019 pool 6: cpus=3D1 node=3D0 flags=3D0x2 nice=3D0 hung=3D2s workers=3D8 manage= r: 1091 pool 8: cpus=3D0-1 flags=3D0x6 nice=3D0 hung=3D0s workers=3D14 manager: 509= 9 Showing backtraces of busy workers in stalled worker pools: pool 7: no worker in running state, cpu=3D1 is busy (nr_workers=3D2 nr_idle= =3D2) The pool might have trouble waking an idle worker. Backtrace of last woken worker: task:kworker/1:1H state:R running task stack:0 pid:4356 tgid:4= 356 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: 0x0 (kblockd) Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T) context_switch kernel/sched/core.c:5533 [inline] __schedule+0x135c/0x2b00 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7376 worker_thread+0x924/0xbd0 kernel/workqueue.c:3575 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 2857 Comm: kworker/R-bat_e Not tainted syzkaller #0 PREE= MPT=20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Goo= gle 09/23/2026 Workqueue: bat_events batadv_tt_purge pstate: 43400005 (nZcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=3D--) pc : check_kcov_mode+0x30/0x54 kernel/kcov.c:179 lr : __sanitizer_cov_trace_pc+0x28/0x5c kernel/kcov.c:213 sp : ffff80008f7f6480 x29: ffff80008f7f6480 x28: ffff0000d7c37cdf x27: dfff800000000000 x26: 1fffe0001af86f99 x25: 0000000000000000 x24: 0000000000000001 x23: 0000000000000003 x22: ffff0000d7c37cc8 x21: 00000000fffffffd x20: ffff0000c989bb00 x19: ffff800085770458 x18: ffff80011b89c000 x17: 0000000000020010 x16: 0038dd8600000000 x15: 0000000000000001 x14: 000000000453af90 x13: 0000000000000002 x12: 0000000000000000 x11: ffff80008f7f6740 x10: 000000000000003f x9 : 0000000000000101 x8 : 0000000000000000 x7 : ffff80008f7f6750 x6 : 0000000000000003 x5 : ffff80008f7f6750 x4 : ffff80008f7f6740 x3 : ffff800085770444 x2 : 00000000fffffffd x1 : ffff0000c989bb00 x0 : 0000000000000002 Call trace: check_kcov_mode+0x30/0x54 kernel/kcov.c:179 (P) find_match+0x1b4/0xacc net/ipv6/route.c:790 __find_rr_leaf+0x1d8/0x634 net/ipv6/route.c:873 find_rr_leaf net/ipv6/route.c:894 [inline] rt6_select net/ipv6/route.c:938 [inline] fib6_table_lookup+0x3a4/0x8e8 net/ipv6/route.c:2261 ip6_pol_route+0x224/0xec4 net/ipv6/route.c:2298 ip6_pol_route_input+0x74/0x98 net/ipv6/route.c:2357 pol_lookup_func include/net/ip6_fib.h:670 [inline] fib6_rule_lookup+0x1a0/0x474 net/ipv6/fib6_rules.c:123 ip6_route_input_lookup+0xa8/0xdc net/ipv6/route.c:2369 ip6_route_input+0x578/0x860 net/ipv6/route.c:2672 ip6_rcv_finish_core+0x200/0x3a4 net/ipv6/ip6_input.c:106 ip6_rcv_finish+0x120/0x204 net/ipv6/ip6_input.c:117 ip_sabotage_in+0x1bc/0x220 net/bridge/br_netfilter_hooks.c:988 nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline] nf_hook_slow+0xc8/0x224 net/netfilter/core.c:619 nf_hook include/linux/netfilter.h:280 [inline] NF_HOOK+0x1f0/0x398 include/linux/netfilter.h:323 ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:351 __netif_receive_skb_one_core+0xc8/0x110 net/core/dev.c:6297 __netif_receive_skb+0x34/0x128 net/core/dev.c:6410 netif_receive_skb_internal net/core/dev.c:6496 [inline] netif_receive_skb+0x1e0/0x888 net/core/dev.c:6555 br_netif_receive_skb+0x138/0x184 net/bridge/br_input.c:30 NF_HOOK+0xa8/0x3a0 include/linux/netfilter.h:325 br_pass_frame_up+0x28c/0x41c net/bridge/br_input.c:70 br_handle_frame_finish+0xed0/0x14c4 net/bridge/br_input.c:-1 br_nf_hook_thresh+0x344/0x3e8 net/bridge/br_netfilter_hooks.c:-1 br_nf_pre_routing_finish_ipv6+0x7ac/0xaa4 net/bridge/br_netfilter_ipv6.c:-= 1 NF_HOOK include/linux/netfilter.h:325 [inline] br_nf_pre_routing_ipv6+0x2c4/0x5f8 net/bridge/br_netfilter_ipv6.c:183 br_nf_pre_routing+0x6e0/0x1168 net/bridge/br_netfilter_hooks.c:513 nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline] nf_hook_bridge_pre net/bridge/br_input.c:291 [inline] br_handle_frame+0xeb0/0x10dc net/bridge/br_input.c:451 __netif_receive_skb_core+0x848/0x2a3c net/core/dev.c:6184 __netif_receive_skb_one_core+0x70/0x110 net/core/dev.c:6295 __netif_receive_skb+0x34/0x128 net/core/dev.c:6410 process_backlog+0x588/0x14e0 net/core/dev.c:6761 __napi_poll+0xb4/0x328 net/core/dev.c:7830 napi_poll net/core/dev.c:7893 [inline] net_rx_action+0x5b0/0xc14 net/core/dev.c:8050 handle_softirqs+0x324/0xcbc kernel/softirq.c:645 __do_softirq+0x14/0x20 kernel/softirq.c:679 ____do_softirq+0x10/0x1c arch/arm64/kernel/irq.c:78 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:901 do_softirq_own_stack+0x1c/0x28 arch/arm64/kernel/irq.c:83 do_softirq+0x90/0xf8 kernel/softirq.c:546 __local_bh_enable_ip+0x190/0x234 kernel/softirq.c:473 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:237 [inline] _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:245 spin_unlock_bh include/linux/spinlock.h:407 [inline] batadv_tt_local_purge+0x274/0x2f0 net/batman-adv/translation-table.c:1402 batadv_tt_purge+0x44/0x7b4 net/batman-adv/translation-table.c:3753 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479 rescuer_thread+0x68c/0xd90 kernel/workqueue.c:3703 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854 net_ratelimit: 106525 callbacks suppressed bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) bridge0: received packet on bridge_slave_1 with own address as source addre= ss (addr:aa:aa:aa:aa:aa:1c, vlan:0) --- If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing.