vxcan1 speed is unknown, defaulting to 1000
==================================================================
BUG: KCSAN: data-race in data_push_tail / number

write to 0xffffffff86d999f5 of 1 bytes by task 7104 on cpu 1:
 number+0x8ca/0xb60 lib/vsprintf.c:556
 vsnprintf+0xb6d/0xed0 lib/vsprintf.c:2871
 vscnprintf+0x29/0x80 lib/vsprintf.c:2908
 printk_sprint kernel/printk/printk.c:2076 [inline]
 vprintk_store+0x638/0xbb0 kernel/printk/printk.c:2186
 vprintk_emit+0xac/0x3c0 kernel/printk/printk.c:2229
 vprintk_default+0x22/0x30 kernel/printk/printk.c:2256
 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50
 _printk+0x76/0x97 kernel/printk/printk.c:2266
 ib_get_eth_speed+0x22f/0x2d0 drivers/infiniband/core/verbs.c:1913
 siw_query_port+0x39/0x250 drivers/infiniband/sw/siw/siw_verbs.c:171
 iw_query_port drivers/infiniband/core/device.c:2048 [inline]
 ib_query_port+0x34f/0x380 drivers/infiniband/core/device.c:2089
 ib_setup_port_attrs+0x14f/0x1290 drivers/infiniband/core/sysfs.c:1430
 add_one_compat_dev+0x2e4/0x3e0 drivers/infiniband/core/device.c:968
 rdma_dev_init_net+0x187/0x210 drivers/infiniband/core/device.c:1184
 ops_init+0x1e7/0x230 net/core/net_namespace.c:140
 setup_net+0x1fb/0x740 net/core/net_namespace.c:326
 copy_net_ns+0x2a9/0x450 net/core/net_namespace.c:470
 create_new_namespaces+0x231/0x560 kernel/nsproxy.c:110
 copy_namespaces+0x116/0x160 kernel/nsproxy.c:178
 copy_process+0x1583/0x2fd0 kernel/fork.c:2194
 kernel_clone+0x15c/0x6a0 kernel/fork.c:2582
 __do_sys_clone kernel/fork.c:2699 [inline]
 __se_sys_clone kernel/fork.c:2683 [inline]
 __x64_sys_clone+0xc6/0xf0 kernel/fork.c:2683
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffffffff86d999f0 of 8 bytes by task 7107 on cpu 0:
 data_make_reusable kernel/printk/printk_ringbuffer.c:587 [inline]
 data_push_tail+0x138/0x470 kernel/printk/printk_ringbuffer.c:672
 data_alloc+0xbc/0x2b0 kernel/printk/printk_ringbuffer.c:1043
 prb_reserve+0x920/0xbf0 kernel/printk/printk_ringbuffer.c:1549
 vprintk_store+0x560/0xbb0 kernel/printk/printk.c:2176
 vprintk_emit+0xac/0x3c0 kernel/printk/printk.c:2229
 vprintk_default+0x22/0x30 kernel/printk/printk.c:2256
 vprintk+0x7f/0x90 kernel/printk/printk_safe.c:50
 _printk+0x76/0x97 kernel/printk/printk.c:2266
 ib_get_eth_speed+0x22f/0x2d0 drivers/infiniband/core/verbs.c:1913
 rxe_query_port+0x4e/0xf0 drivers/infiniband/sw/rxe/rxe_verbs.c:38
 __ib_query_port drivers/infiniband/core/device.c:2059 [inline]
 ib_query_port+0x10e/0x380 drivers/infiniband/core/device.c:2091
 ib_setup_port_attrs+0x14f/0x1290 drivers/infiniband/core/sysfs.c:1430
 add_one_compat_dev+0x2e4/0x3e0 drivers/infiniband/core/device.c:968
 rdma_dev_init_net+0x187/0x210 drivers/infiniband/core/device.c:1184
 ops_init+0x1e7/0x230 net/core/net_namespace.c:140
 setup_net+0x1fb/0x740 net/core/net_namespace.c:326
 copy_net_ns+0x2a9/0x450 net/core/net_namespace.c:470
 create_new_namespaces+0x231/0x560 kernel/nsproxy.c:110
 copy_namespaces+0x116/0x160 kernel/nsproxy.c:178
 copy_process+0x1583/0x2fd0 kernel/fork.c:2194
 kernel_clone+0x15c/0x6a0 kernel/fork.c:2582
 __do_sys_clone kernel/fork.c:2699 [inline]
 __se_sys_clone kernel/fork.c:2683 [inline]
 __x64_sys_clone+0xc6/0xf0 kernel/fork.c:2683
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x00000000ffffe8a8 -> 0x000000206f742067

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7107 Comm: syz-executor.1 Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
lo speed is unknown, defaulting to 1000