================================================================== BUG: KCSAN: data-race in __d_lookup / __d_rehash write to 0xffff8881068ba250 of 8 bytes by task 3301 on cpu 0: hlist_bl_add_head_rcu include/linux/rculist_bl.h:81 [inline] __d_rehash+0xa9/0x210 fs/dcache.c:2431 __d_add+0x373/0x4a0 fs/dcache.c:2646 d_splice_alias+0xd6/0x270 fs/dcache.c:3037 proc_sys_lookup+0x386/0x440 fs/proc/proc_sysctl.c:545 lookup_open fs/namei.c:3627 [inline] open_last_lookups fs/namei.c:3748 [inline] path_openat+0xd40/0x1fa0 fs/namei.c:3984 do_filp_open+0x107/0x230 fs/namei.c:4014 do_sys_openat2+0xab/0x120 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1428 x64_sys_call+0x2b30/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f read to 0xffff8881068ba250 of 8 bytes by task 3302 on cpu 1: hlist_bl_unhashed include/linux/list_bl.h:54 [inline] d_unhashed include/linux/dcache.h:354 [inline] __d_lookup+0xf1/0x370 fs/dcache.c:2341 lookup_fast+0x4c/0x2a0 fs/namei.c:1749 lookup_fast_for_open fs/namei.c:3686 [inline] open_last_lookups fs/namei.c:3719 [inline] path_openat+0x41e/0x1fa0 fs/namei.c:3984 do_filp_open+0x107/0x230 fs/namei.c:4014 do_sys_openat2+0xab/0x120 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1428 x64_sys_call+0x2b30/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0xffff88823743e778 -> 0xffff8881068bac08 Reported by Kernel Concurrency Sanitizer on: CPU: 1 UID: 0 PID: 3302 Comm: syz-executor Not tainted 6.13.0-rc4-syzkaller-00069-g8379578b11d5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ================================================================== 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 bridge_slave_0: entered allmulticast mode bridge_slave_0: entered promiscuous mode bridge0: port 2(bridge_slave_1) entered blocking state bridge0: port 2(bridge_slave_1) entered disabled state bridge_slave_1: entered allmulticast mode bridge_slave_1: entered promiscuous mode bond0: (slave bond_slave_0): Enslaving as an active interface with an up link bond0: (slave bond_slave_1): Enslaving as an active interface with an up link team0: Port device team_slave_0 added 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 hsr_slave_0: entered promiscuous mode hsr_slave_1: entered promiscuous mode debugfs: Directory 'hsr0' with parent 'hsr' already present! Cannot create hsr debugfs directory netdevsim netdevsim4 netdevsim0: renamed from eth0 netdevsim netdevsim4 netdevsim1: renamed from eth1 netdevsim netdevsim4 netdevsim2: renamed from eth2 netdevsim netdevsim4 netdevsim3: renamed from eth3 8021q: adding VLAN 0 to HW filter on device bond0 8021q: adding VLAN 0 to HW filter on device team0 hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network 8021q: adding VLAN 0 to HW filter on device batadv0 veth0_vlan: entered promiscuous mode veth1_vlan: entered promiscuous mode veth0_macvtap: entered promiscuous mode veth1_macvtap: entered promiscuous mode batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: batadv0: Interface activated: batadv_slave_0 batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! batman_adv: batadv0: Interface activated: batadv_slave_1 netdevsim netdevsim4 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim4 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim4 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 netdevsim netdevsim4 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0