==================================================================
BUG: KCSAN: data-race in can_receive / can_receive

read-write to 0xffff888126999b88 of 8 bytes by interrupt on cpu 1:
 can_receive+0x4e/0x1f0 net/can/af_can.c:649
 canfd_rcv+0xe7/0x180 net/can/af_can.c:702
 __netif_receive_skb_one_core net/core/dev.c:5452 [inline]
 __netif_receive_skb+0x90/0x1b0 net/core/dev.c:5566
 process_backlog+0x21f/0x380 net/core/dev.c:5894
 __napi_poll+0x60/0x3b0 net/core/dev.c:6460
 napi_poll net/core/dev.c:6527 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6660
 __do_softirq+0xc1/0x265 kernel/softirq.c:553
 run_ksoftirqd+0x17/0x20 kernel/softirq.c:921
 smpboot_thread_fn+0x30a/0x4a0 kernel/smpboot.c:164
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read-write to 0xffff888126999b88 of 8 bytes by interrupt on cpu 0:
 can_receive+0x4e/0x1f0 net/can/af_can.c:649
 canfd_rcv+0xe7/0x180 net/can/af_can.c:702
 __netif_receive_skb_one_core net/core/dev.c:5452 [inline]
 __netif_receive_skb+0x90/0x1b0 net/core/dev.c:5566
 process_backlog+0x21f/0x380 net/core/dev.c:5894
 __napi_poll+0x60/0x3b0 net/core/dev.c:6460
 napi_poll net/core/dev.c:6527 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6660
 __do_softirq+0xc1/0x265 kernel/softirq.c:553
 do_softirq+0x5e/0x90 kernel/softirq.c:454
 __local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 release_sock net/core/sock.c:3518 [inline]
 sockopt_release_sock+0x130/0x140 net/core/sock.c:1070
 do_ip_getsockopt+0xa5d/0x1010 net/ipv4/ip_sockglue.c:1775
 ip_getsockopt+0x5c/0x170 net/ipv4/ip_sockglue.c:1808
 tcp_getsockopt+0xa7/0xd0 net/ipv4/tcp.c:4301
 sock_common_getsockopt+0x57/0x70 net/core/sock.c:3659
 __sys_getsockopt+0x17b/0x1e0 net/socket.c:2307
 __do_sys_getsockopt net/socket.c:2322 [inline]
 __se_sys_getsockopt net/socket.c:2319 [inline]
 __x64_sys_getsockopt+0x66/0x80 net/socket.c:2319
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x0000000000004d31 -> 0x0000000000004d32

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3078 Comm: syz-executor.5 Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
==================================================================
==================================================================
BUG: KCSAN: data-race in can_receive / can_receive

read-write to 0xffff888126999be8 of 8 bytes by interrupt on cpu 1:
 can_receive+0x62/0x1f0 net/can/af_can.c:650
 canfd_rcv+0xe7/0x180 net/can/af_can.c:702
 __netif_receive_skb_one_core net/core/dev.c:5452 [inline]
 __netif_receive_skb+0x90/0x1b0 net/core/dev.c:5566
 process_backlog+0x21f/0x380 net/core/dev.c:5894
 __napi_poll+0x60/0x3b0 net/core/dev.c:6460
 napi_poll net/core/dev.c:6527 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6660
 __do_softirq+0xc1/0x265 kernel/softirq.c:553
 do_softirq+0x5e/0x90 kernel/softirq.c:454
 __local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:823 [inline]
 nsim_dev_trap_report_work+0x4cf/0x5a0 drivers/net/netdevsim/dev.c:853
 process_one_work+0x434/0x860 kernel/workqueue.c:2597
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read-write to 0xffff888126999be8 of 8 bytes by interrupt on cpu 0:
 can_receive+0x62/0x1f0 net/can/af_can.c:650
 canfd_rcv+0xe7/0x180 net/can/af_can.c:702
 __netif_receive_skb_one_core net/core/dev.c:5452 [inline]
 __netif_receive_skb+0x90/0x1b0 net/core/dev.c:5566
 process_backlog+0x21f/0x380 net/core/dev.c:5894
 __napi_poll+0x60/0x3b0 net/core/dev.c:6460
 napi_poll net/core/dev.c:6527 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6660
 __do_softirq+0xc1/0x265 kernel/softirq.c:553
 do_softirq+0x5e/0x90 kernel/softirq.c:454
 __local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 batadv_purge_orig_ref+0xb89/0xbf0 net/batman-adv/originator.c:1259
 batadv_purge_orig+0x19/0x40 net/batman-adv/originator.c:1272
 process_one_work+0x434/0x860 kernel/workqueue.c:2597
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

value changed: 0x00000000000018bb -> 0x00000000000018bc

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 274 Comm: kworker/u4:3 Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Workqueue: bat_events batadv_purge_orig
==================================================================
==================================================================
BUG: KCSAN: data-race in can_receive / can_receive

read-write to 0xffff8881266b88e8 of 8 bytes by interrupt on cpu 1:
 can_receive+0x62/0x1f0 net/can/af_can.c:650
 canfd_rcv+0xe7/0x180 net/can/af_can.c:702
 __netif_receive_skb_one_core net/core/dev.c:5452 [inline]
 __netif_receive_skb+0x90/0x1b0 net/core/dev.c:5566
 process_backlog+0x21f/0x380 net/core/dev.c:5894
 __napi_poll+0x60/0x3b0 net/core/dev.c:6460
 napi_poll net/core/dev.c:6527 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6660
 __do_softirq+0xc1/0x265 kernel/softirq.c:553
 do_softirq+0x5e/0x90 kernel/softirq.c:454
 __local_bh_enable_ip+0x64/0x70 kernel/softirq.c:381
 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline]
 _raw_spin_unlock_bh+0x36/0x40 kernel/locking/spinlock.c:210
 spin_unlock_bh include/linux/spinlock.h:395 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:823 [inline]
 nsim_dev_trap_report_work+0x4cf/0x5a0 drivers/net/netdevsim/dev.c:853
 process_one_work+0x434/0x860 kernel/workqueue.c:2597
 worker_thread+0x5f2/0xa10 kernel/workqueue.c:2748
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

read-write to 0xffff8881266b88e8 of 8 bytes by interrupt on cpu 0:
 can_receive+0x62/0x1f0 net/can/af_can.c:650
 canfd_rcv+0xe7/0x180 net/can/af_can.c:702
 __netif_receive_skb_one_core net/core/dev.c:5452 [inline]
 __netif_receive_skb+0x90/0x1b0 net/core/dev.c:5566
 process_backlog+0x21f/0x380 net/core/dev.c:5894
 __napi_poll+0x60/0x3b0 net/core/dev.c:6460
 napi_poll net/core/dev.c:6527 [inline]
 net_rx_action+0x32b/0x750 net/core/dev.c:6660
 __do_softirq+0xc1/0x265 kernel/softirq.c:553
 run_ksoftirqd+0x17/0x20 kernel/softirq.c:921
 smpboot_thread_fn+0x30a/0x4a0 kernel/smpboot.c:164
 kthread+0x1d7/0x210 kernel/kthread.c:389
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

value changed: 0x0000000000004561 -> 0x0000000000004563

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
==================================================================