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BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu

read-write to 0xffff888237c1fd14 of 4 bytes by interrupt on cpu 0:
 hrtimer_interrupt+0x72/0x4a0 kernel/time/hrtimer.c:1842
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x5c/0x1d0 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1049
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 check_kcov_mode kernel/kcov.c:183 [inline]
 __sanitizer_cov_trace_pc+0x31/0x70 kernel/kcov.c:217
 idr_get_free+0x1d6/0x550 lib/radix-tree.c:1514
 idr_alloc_u32+0xcb/0x180 lib/idr.c:46
 idr_alloc_cyclic+0x85/0x140 lib/idr.c:125
 __kernfs_new_node+0xb9/0x380 fs/kernfs/dir.c:630
 kernfs_new_node+0xc8/0x140 fs/kernfs/dir.c:700
 __kernfs_create_file+0x49/0x180 fs/kernfs/file.c:1034
 sysfs_add_file_mode_ns+0x136/0x1c0 fs/sysfs/file.c:313
 create_files fs/sysfs/group.c:76 [inline]
 internal_create_group+0x462/0xa20 fs/sysfs/group.c:183
 internal_create_groups fs/sysfs/group.c:223 [inline]
 sysfs_create_groups+0x3c/0xe0 fs/sysfs/group.c:249
 setup_port drivers/infiniband/core/sysfs.c:1258 [inline]
 ib_setup_port_attrs+0x951/0x1340 drivers/infiniband/core/sysfs.c:1444
 add_one_compat_dev+0x2e6/0x3e0 drivers/infiniband/core/device.c:959
 rdma_dev_init_net+0x183/0x210 drivers/infiniband/core/device.c:1175
 ops_init+0x1c9/0x260 net/core/net_namespace.c:138
 setup_net+0x14d/0x600 net/core/net_namespace.c:362
 copy_net_ns+0x290/0x430 net/core/net_namespace.c:516
 create_new_namespaces+0x228/0x430 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xe6/0x120 kernel/nsproxy.c:228
 ksys_unshare+0x3c9/0x6e0 kernel/fork.c:3331
 __do_sys_unshare kernel/fork.c:3402 [inline]
 __se_sys_unshare kernel/fork.c:3400 [inline]
 __x64_sys_unshare+0x1f/0x30 kernel/fork.c:3400
 x64_sys_call+0x1a3e/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:273
 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 0xffff888237c1fd14 of 4 bytes by task 22342 on cpu 1:
 print_cpu+0x348/0x670 kernel/time/timer_list.c:135
 timer_list_show+0x115/0x180 kernel/time/timer_list.c:295
 seq_read_iter+0x2d1/0x930 fs/seq_file.c:230
 proc_reg_read_iter+0x118/0x190 fs/proc/inode.c:299
 copy_splice_read+0x383/0x5b0 fs/splice.c:365
 do_splice_read fs/splice.c:985 [inline]
 splice_direct_to_actor+0x269/0x670 fs/splice.c:1089
 do_splice_direct_actor fs/splice.c:1207 [inline]
 do_splice_direct+0xd7/0x150 fs/splice.c:1233
 do_sendfile+0x398/0x660 fs/read_write.c:1363
 __do_sys_sendfile64 fs/read_write.c:1424 [inline]
 __se_sys_sendfile64 fs/read_write.c:1410 [inline]
 __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1410
 x64_sys_call+0xfbd/0x2dc0 arch/x86/include/generated/asm/syscalls_64.h:41
 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: 0x001deb6a -> 0x001deb6c

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 22342 Comm: +}[@ Not tainted 6.13.0-syzkaller-08265-g9c5968db9e62 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
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