SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 rcu: INFO: rcu_sched detected stalls on CPUs/tasks: rcu: (detected by 0, t=10502 jiffies, g=10709, q=18) rcu: All QSes seen, last rcu_sched kthread activity 10498 (4294988911-4294978413), jiffies_till_next_fqs=1, root ->qsmask 0x0 syz-executor.4 R running task 27168 28381 6836 0x00000000 Call Trace: sched_show_task kernel/sched/core.c:5338 [inline] sched_show_task.cold+0x2e2/0x343 kernel/sched/core.c:5313 print_other_cpu_stall kernel/rcu/tree.c:1430 [inline] check_cpu_stall kernel/rcu/tree.c:1557 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0xaf0/0xddc kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1638 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x2fc/0xd50 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_is_held_type+0x17a/0x210 kernel/locking/lockdep.c:3947 Code: 00 00 00 00 fc ff df c7 85 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 75 63 48 83 3d 75 62 83 07 00 74 2c 48 89 df 57 9d <0f> 1f 44 00 00 48 83 c4 08 44 89 e0 5b 5d 41 5c c3 48 83 c4 08 41 RSP: 0018:ffff8880453d70e0 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff11a4ac9 RBX: 0000000000000282 RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffffff88d92920 RDI: 0000000000000282 RBP: ffff888090814300 R08: ffff888090814300 R09: ffffed1015cc4733 R10: ffffed1015cc4732 R11: ffff8880ae623993 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88807ff72f18 R15: 000000000000044a lock_is_held include/linux/lockdep.h:344 [inline] rcu_read_lock_sched_held+0x10a/0x130 kernel/rcu/update.c:118 trace_block_touch_buffer include/trace/events/block.h:45 [inline] touch_buffer fs/buffer.c:58 [inline] __find_get_block+0xadc/0xda0 fs/buffer.c:1299 __getblk_gfp+0x33/0xa30 fs/buffer.c:1317 sb_getblk include/linux/buffer_head.h:325 [inline] __ext4_get_inode_loc+0x34d/0x1110 fs/ext4/inode.c:4608 ext4_get_inode_loc fs/ext4/inode.c:4721 [inline] ext4_reserve_inode_write+0xed/0x260 fs/ext4/inode.c:5924 ext4_mark_inode_dirty+0x15b/0x890 fs/ext4/inode.c:6091 ext4_dirty_inode+0x88/0xb0 fs/ext4/inode.c:6130 __mark_inode_dirty+0x8d8/0x1240 fs/fs-writeback.c:2176 mark_inode_dirty include/linux/fs.h:2083 [inline] __generic_write_end+0x28d/0x330 fs/buffer.c:2118 ext4_da_write_end+0x3d0/0xaa0 fs/ext4/inode.c:3193 generic_perform_write+0x2ae/0x4d0 mm/filemap.c:3173 __generic_file_write_iter+0x24c/0x610 mm/filemap.c:3287 ext4_file_write_iter+0x2fe/0xf90 fs/ext4/file.c:272 call_write_iter include/linux/fs.h:1821 [inline] do_iter_readv_writev+0x50c/0x790 fs/read_write.c:681 do_iter_write fs/read_write.c:960 [inline] do_iter_write+0x185/0x5e0 fs/read_write.c:941 vfs_iter_write+0x70/0xa0 fs/read_write.c:973 iter_file_splice_write+0x60c/0xb30 fs/splice.c:750 do_splice_from fs/splice.c:852 [inline] direct_splice_actor+0x115/0x160 fs/splice.c:1025 splice_direct_to_actor+0x33f/0x8d0 fs/splice.c:980 do_splice_direct+0x1a8/0x270 fs/splice.c:1068 do_sendfile+0x549/0xc10 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1502 [inline] __se_sys_sendfile64 fs/read_write.c:1494 [inline] __x64_sys_sendfile64+0x149/0x210 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c889 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc815c5dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fc815c5e6d4 RCX: 000000000045c889 RDX: 00000000200001c0 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 00008080fffffffe R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000008d6 R14: 00000000004cb7ee R15: 000000000076bfac rcu: rcu_sched kthread starved for 10498 jiffies! g10709 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_sched R running task 29744 11 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x4d1/0xf20 kernel/time/timer.c:1806 rcu_gp_kthread+0xcee/0x2060 kernel/rcu/tree.c:2202 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3694 rcu: (detected by 0, t=10561 jiffies, g=65873, q=76) systemd-udevd R running task 25344 3694 1 0x00000100 Call Trace: preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3742 retint_kernel+0x1b/0x2d RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100 Code: 2c 8e 87 4c 89 25 bc 72 26 0a 41 bc f4 ff ff ff e8 1a 1f eb ff 48 c7 05 a6 72 26 0a 00 00 00 00 e9 24 ec ff ff 90 48 8b 34 24 <65> 48 8b 04 25 40 ee 01 00 65 8b 15 1c 44 9a 7e 81 e2 00 01 1f 00 RSP: 0018:ffff888090887768 EFLAGS: 00000207 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff83135edb RDX: 0000000000000000 RSI: ffffffff83135db5 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffff888090878300 R09: ffffed1015ce4733 R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: 0000000000000005 R13: 0000000000800000 R14: ffff8880908878a0 R15: 0000000000000000 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:681 [inline] avc_has_perm_noaudit+0x325/0x520 security/selinux/avc.c:1159 selinux_inode_permission+0x3bc/0x640 security/selinux/hooks.c:3222 security_inode_permission+0xae/0xf0 security/security.c:704 inode_permission+0x11b/0x550 fs/namei.c:459 may_lookup fs/namei.c:1697 [inline] link_path_walk.part.0+0x1a0/0x1210 fs/namei.c:2085 link_path_walk fs/namei.c:2270 [inline] path_lookupat.isra.0+0xe3/0x8d0 fs/namei.c:2318 filename_lookup+0x1b0/0x410 fs/namei.c:2349 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x113/0x1e0 fs/stat.c:185 vfs_lstat include/linux/fs.h:3134 [inline] __do_sys_newlstat+0x96/0x120 fs/stat.c:350 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f2474e98335 Code: Bad RIP value. RSP: 002b:00007ffed3a04088 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 RAX: ffffffffffffffda RBX: 0000562a7c9141d0 RCX: 00007f2474e98335 RDX: 00007ffed3a040c0 RSI: 00007ffed3a040c0 RDI: 0000562a7c9131d0 RBP: 00007ffed3a04180 R08: 00007f2475157208 R09: 0000000000001010 R10: 0000000000000040 R11: 0000000000000246 R12: 0000562a7c9131d0 R13: 0000562a7c9131fe R14: 0000562a7c90ab37 R15: 0000562a7c90ab3e systemd-udevd R running task 25344 3694 1 0x00000100 Call Trace: preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:3742 retint_kernel+0x1b/0x2d RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100 Code: 2c 8e 87 4c 89 25 bc 72 26 0a 41 bc f4 ff ff ff e8 1a 1f eb ff 48 c7 05 a6 72 26 0a 00 00 00 00 e9 24 ec ff ff 90 48 8b 34 24 <65> 48 8b 04 25 40 ee 01 00 65 8b 15 1c 44 9a 7e 81 e2 00 01 1f 00 RSP: 0018:ffff888090887768 EFLAGS: 00000207 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff83135edb RDX: 0000000000000000 RSI: ffffffff83135db5 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffff888090878300 R09: ffffed1015ce4733 R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: 0000000000000005 R13: 0000000000800000 R14: ffff8880908878a0 R15: 0000000000000000 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:681 [inline] avc_has_perm_noaudit+0x325/0x520 security/selinux/avc.c:1159 selinux_inode_permission+0x3bc/0x640 security/selinux/hooks.c:3222 security_inode_permission+0xae/0xf0 security/security.c:704 inode_permission+0x11b/0x550 fs/namei.c:459 may_lookup fs/namei.c:1697 [inline] link_path_walk.part.0+0x1a0/0x1210 fs/namei.c:2085 link_path_walk fs/namei.c:2270 [inline] path_lookupat.isra.0+0xe3/0x8d0 fs/namei.c:2318 filename_lookup+0x1b0/0x410 fs/namei.c:2349 user_path_at include/linux/namei.h:57 [inline] vfs_statx+0x113/0x1e0 fs/stat.c:185 vfs_lstat include/linux/fs.h:3134 [inline] __do_sys_newlstat+0x96/0x120 fs/stat.c:350 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f2474e98335 Code: Bad RIP value. RSP: 002b:00007ffed3a04088 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 RAX: ffffffffffffffda RBX: 0000562a7c9141d0 RCX: 00007f2474e98335 RDX: 00007ffed3a040c0 RSI: 00007ffed3a040c0 RDI: 0000562a7c9131d0 RBP: 00007ffed3a04180 R08: 00007f2475157208 R09: 0000000000001010 R10: 0000000000000040 R11: 0000000000000246 R12: 0000562a7c9131d0 R13: 0000562a7c9131fe R14: 0000562a7c90ab37 R15: 0000562a7c90ab3e rcu: rcu_preempt kthread starved for 10561 jiffies! g65873 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29136 10 2 0x80000000 Call Trace: sched: RT throttling activated schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x4d1/0xf20 kernel/time/timer.c:1806 rcu_gp_kthread+0xcee/0x2060 kernel/rcu/tree.c:2202 audit: type=1804 audit(1587197339.162:78): pid=28411 uid=0 auid=0 ses=4 subj=system_u:system_r:kernel_t:s0 op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir033738307/syzkaller.fVBrIQ/1028/file0/file0" dev="sda1" ino=17007 res=1 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=28377 comm=syz-executor.0 Left network mode IPVS: ftp: loaded support on port[0] = 21 chnl_net:caif_netlink_parms(): no params data found bridge0: port 1(bridge_slave_0) entered blocking state bridge0: port 1(bridge_slave_0) entered disabled state device bridge_slave_0 entered promiscuous mode bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered disabled state device bridge_slave_1 entered promiscuous mode bond0: Enslaving bond_slave_0 as an active interface with an up link bond0: Enslaving bond_slave_1 as an active interface with an up link IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready team0: Port device team_slave_0 added IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready team0: Port device team_slave_1 added batman_adv: batadv0: Adding interface: batadv_slave_0 batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active batman_adv: batadv0: Adding interface: batadv_slave_1 batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 device hsr_slave_0 entered promiscuous mode device hsr_slave_1 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready