INFO: task syz.2.1123:6295 blocked for more than 143 seconds. Not tainted 6.1.112-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.2.1123 state:D stack:24352 pid:6295 ppid:3647 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5241 [inline] __schedule+0x143f/0x4570 kernel/sched/core.c:6558 schedule+0xbf/0x180 kernel/sched/core.c:6634 xlog_grant_head_wait+0x3b6/0xa00 fs/xfs/xfs_log.c:307 xlog_grant_head_check+0x295/0x480 xfs_log_reserve+0x3e1/0xc30 fs/xfs/xfs_log.c:486 xfs_trans_reserve+0x239/0x6a0 fs/xfs/xfs_trans.c:194 xfs_trans_alloc+0x41b/0x870 fs/xfs/xfs_trans.c:283 xfs_trans_alloc_inode+0x129/0x450 fs/xfs/xfs_trans.c:1198 xfs_attr_set+0xa4e/0x1660 fs/xfs/libxfs/xfs_attr.c:1024 xfs_attr_change fs/xfs/xfs_xattr.c:106 [inline] xfs_xattr_set+0x227/0x3a0 fs/xfs/xfs_xattr.c:151 __vfs_setxattr+0x3e7/0x420 fs/xattr.c:182 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:216 vfs_setxattr+0x21d/0x420 fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x250/0x2b0 fs/xattr.c:617 path_setxattr+0x1bc/0x2a0 fs/xattr.c:636 __do_sys_setxattr fs/xattr.c:652 [inline] __se_sys_setxattr fs/xattr.c:648 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:648 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f682e37dff9 RSP: 002b:00007f682f195038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 00007f682e535f80 RCX: 00007f682e37dff9 RDX: 0000000020000880 RSI: 0000000020000240 RDI: 0000000020000300 RBP: 00007f682e3f0296 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ff27 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f682e535f80 R15: 00007ffc8d75c978 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d32b1d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d32b9d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:517 5 locks held by ksoftirqd/1/21: 1 lock held by khungtaskd/27: #0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline] #0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline] #0: ffffffff8d32b000 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494 2 locks held by getty/3412: #0: ffff88802e37a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2198 3 locks held by kworker/1:4/3692: #0: ffff888017c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #1: ffffc900045efd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #2: ffffffff8d3305f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline] #2: ffffffff8d3305f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962 1 lock held by syz-executor/4640: #0: ffffffff8d3305f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline] #0: ffffffff8d3305f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x930 kernel/rcu/tree_exp.h:962 2 locks held by kworker/1:11/5169: #0: ffff888017c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #1: ffffc9000ab1fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 3 locks held by syz.2.1123/6295: #0: ffff88805585a460 (sb_writers#29){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393 #1: ffff8880756c6038 (&inode->i_sb->s_type->i_mutex_dir_key#2){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff8880756c6038 (&inode->i_sb->s_type->i_mutex_dir_key#2){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308 #2: ffff88805585a650 (sb_internal#6){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0x129/0x450 fs/xfs/xfs_trans.c:1198 3 locks held by syz.4.1758/7809: #0: ffff88802990e460 (sb_writers#29){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393 #1: ffff88805891f778 (&inode->i_sb->s_type->i_mutex_dir_key#2){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline] #1: ffff88805891f778 (&inode->i_sb->s_type->i_mutex_dir_key#2){++++}-{3:3}, at: vfs_setxattr+0x1dd/0x420 fs/xattr.c:308 #2: ffff88802990e650 (sb_internal#6){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0x129/0x450 fs/xfs/xfs_trans.c:1198 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.1.112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1ae/0x3f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xf88/0xfd0 kernel/hung_task.c:377 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.1.112-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:__find_rr_leaf+0x146/0x8e0 net/ipv6/route.c:804 Code: 89 84 24 98 00 00 00 48 89 5c 24 40 4c 89 74 24 48 4d 85 f6 74 3d 49 8d 9c 24 80 00 00 00 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 0f 85 9b 04 00 00 44 8b 2b 44 89 ef 8b 5c 24 74 89 de e8 91 RSP: 0018:ffffc90000146200 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffff888059144080 RCX: ffff888017f53b80 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000146378 R08: ffffffff8966dd4c R09: ffffc900001464b0 R10: ffffc900001464a0 R11: dffffc0000000001 R12: ffff888059144000 R13: 0000000000000000 R14: ffffc90000146480 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ef73a39690 CR3: 000000007e5e7000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: find_rr_leaf net/ipv6/route.c:856 [inline] rt6_select net/ipv6/route.c:900 [inline] fib6_table_lookup+0x40f/0xbb0 net/ipv6/route.c:2189 ip6_pol_route+0x207/0x14e0 net/ipv6/route.c:2225 pol_lookup_func include/net/ip6_fib.h:579 [inline] __fib6_rule_action net/ipv6/fib6_rules.c:233 [inline] fib6_rule_action+0x1bf/0x740 net/ipv6/fib6_rules.c:271 fib_rules_lookup+0x431/0xd00 net/core/fib_rules.c:318 fib6_rule_lookup+0x1f9/0x620 net/ipv6/fib6_rules.c:108 ip6_route_input_lookup net/ipv6/route.c:2294 [inline] ip6_route_input+0x830/0xd90 net/ipv6/route.c:2590 ip6_rcv_finish+0x140/0x230 net/ipv6/ip6_input.c:77 ip_sabotage_in+0x1f3/0x270 net/bridge/br_netfilter_hooks.c:997 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:614 nf_hook include/linux/netfilter.h:257 [inline] NF_HOOK+0x29a/0x450 include/linux/netfilter.h:300 __netif_receive_skb_one_core net/core/dev.c:5528 [inline] __netif_receive_skb+0x1c6/0x530 net/core/dev.c:5642 netif_receive_skb_internal net/core/dev.c:5728 [inline] netif_receive_skb+0x1f4/0x890 net/core/dev.c:5787 NF_HOOK+0x96/0x3f0 include/linux/netfilter.h:302 br_handle_frame_finish+0x1601/0x1bf0 net/bridge/br_input.c:204 br_nf_hook_thresh+0x46a/0x580 net/bridge/br_netfilter_hooks.c:1180 br_nf_pre_routing_finish_ipv6+0xa92/0xdc0 NF_HOOK include/linux/netfilter.h:302 [inline] br_nf_pre_routing_ipv6+0x354/0x740 net/bridge/br_netfilter_ipv6.c:243 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline] nf_hook_bridge_pre net/bridge/br_input.c:260 [inline] br_handle_frame+0x991/0x1340 net/bridge/br_input.c:406 __netif_receive_skb_core+0x13dd/0x41d0 net/core/dev.c:5422 __netif_receive_skb_one_core net/core/dev.c:5526 [inline] __netif_receive_skb+0x11c/0x530 net/core/dev.c:5642 process_backlog+0x381/0x760 net/core/dev.c:5970 __napi_poll+0xc7/0x470 net/core/dev.c:6537 napi_poll net/core/dev.c:6604 [inline] net_rx_action+0x70f/0xeb0 net/core/dev.c:6718 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:571 run_ksoftirqd+0xc6/0x120 kernel/softirq.c:938 smpboot_thread_fn+0x52c/0xa30 kernel/smpboot.c:164 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 net_ratelimit: 8195 callbacks suppressed bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:1a:50:ad:5f:4c:b9, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)