================================================================== BUG: KCSAN: data-race in hrtimer_interrupt / print_cpu write to 0xffff888237d1ffa0 of 8 bytes by interrupt on cpu 1: hrtimer_interrupt+0x18c/0x7b0 kernel/time/hrtimer.c:1810 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline] __sysvec_apic_timer_interrupt+0x5c/0x1a0 arch/x86/kernel/apic/apic.c:1049 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x6e/0x80 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 crc32_body lib/crc32.c:110 [inline] crc32_le_generic lib/crc32.c:179 [inline] __crc32c_le_base+0xac/0x520 lib/crc32.c:201 chksum_update+0x32/0x50 crypto/crc32c_generic.c:88 crypto_shash_update+0x4a/0x60 crypto/shash.c:70 jbd2_chksum include/linux/jbd2.h:1801 [inline] jbd2_block_tag_csum_set fs/jbd2/commit.c:334 [inline] jbd2_journal_commit_transaction+0x1238/0x33d0 fs/jbd2/commit.c:684 kjournald2+0x243/0x430 fs/jbd2/journal.c:201 kthread+0x1d1/0x210 kernel/kthread.c:388 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 read to 0xffff888237d1ffa0 of 8 bytes by task 26976 on cpu 0: print_cpu+0x2fb/0x670 kernel/time/timer_list.c:133 timer_list_show+0x115/0x180 kernel/time/timer_list.c:295 seq_read_iter+0x65b/0x940 fs/seq_file.c:272 proc_reg_read_iter+0x11e/0x190 fs/proc/inode.c:299 call_read_iter include/linux/fs.h:2104 [inline] copy_splice_read+0x3a4/0x5d0 fs/splice.c:365 do_splice_read fs/splice.c:985 [inline] splice_direct_to_actor+0x26c/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+0x3b9/0x970 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64 fs/read_write.c:1348 [inline] __x64_sys_sendfile64+0x110/0x150 fs/read_write.c:1348 x64_sys_call+0x2c67/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:41 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f value changed: 0x00000088777709da -> 0x0000008877797200 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 26976 Comm: syz-executor.2 Tainted: G W 6.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 ==================================================================