===================================================== BUG: KMSAN: uninit-value in do_profile_hits kernel/profile.c:308 [inline] BUG: KMSAN: uninit-value in profile_hits+0xbd1/0x12f0 kernel/profile.c:398 CPU: 0 PID: 922 Comm: kworker/u4:15 Not tainted 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x24c/0x2e0 lib/dump_stack.c:120 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:121 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197 do_profile_hits kernel/profile.c:308 [inline] profile_hits+0xbd1/0x12f0 kernel/profile.c:398 profile_hit include/linux/profile.h:63 [inline] profile_tick+0x215/0x220 kernel/profile.c:408 tick_sched_handle kernel/time/tick-sched.c:227 [inline] tick_sched_timer+0x472/0x5b0 kernel/time/tick-sched.c:1374 __run_hrtimer+0x48b/0xd20 kernel/time/hrtimer.c:1537 __hrtimer_run_queues kernel/time/hrtimer.c:1601 [inline] hrtimer_interrupt+0x6e2/0x1b50 kernel/time/hrtimer.c:1663 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0xfd/0x470 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0xc1/0xf0 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:665 RIP: 0010:_raw_spin_unlock_irqrestore+0x62/0x80 kernel/locking/spinlock.c:192 Code: 00 00 41 c6 04 24 00 81 e3 00 02 00 00 41 81 e7 00 02 00 00 48 85 db 74 0a f7 d3 44 21 fb 48 85 db 74 16 4d 85 ff 74 01 fb 5b <41> 5c 41 5e 41 5f 5d c3 e8 51 d9 a5 f2 eb be 44 89 f7 e8 47 d9 a5 RSP: 0018:ffff888104a8b9a8 EFLAGS: 00000206 RAX: ffff888134c77af4 RBX: ffff888135477a90 RCX: 0000000135077af4 RDX: ffff888135077af4 RSI: 0000000000000260 RDI: ffff888135477af4 RBP: ffff888104a8b9c0 R08: ffffea000000000f R09: ffff88813fffa000 R10: 0000000012fa336f R11: 0000000000000000 R12: ffff888135477af4 R13: ffff888135477a98 R14: 0000000000000000 R15: 0000000000000200 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] ext4_finish_bio+0xe06/0x1050 fs/ext4/page-io.c:140 ext4_release_io_end+0x18b/0x620 fs/ext4/page-io.c:158 ext4_end_io_end fs/ext4/page-io.c:192 [inline] ext4_do_flush_completed_IO fs/ext4/page-io.c:257 [inline] ext4_end_io_rsv_work+0x97b/0xb80 fs/ext4/page-io.c:271 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2276 worker_thread+0x10ec/0x2340 kernel/workqueue.c:2422 kthread+0x521/0x560 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Local variable ----es@ext4_map_blocks created at: ext4_map_blocks+0x9e/0x3820 fs/ext4/inode.c:505 ext4_map_blocks+0x9e/0x3820 fs/ext4/inode.c:505 =====================================================