===================================================== 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: 1 PID: 8205 Comm: syz-fuzzer Not tainted 5.12.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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:64 [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:1369 __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:650 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 21 ca b6 f2 eb be 44 89 f7 e8 17 ca b6 RSP: 0000:ffff88812a343510 EFLAGS: 00000206 RAX: ffff888140e7c050 RBX: 000000000000000f RCX: 000000014127c050 RDX: ffff88814127c050 RSI: 0000000000000280 RDI: ffff88814167c050 RBP: ffff88812a343528 R08: ffffea000000000f R09: ffff88813fffa000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88814167c050 R13: 0000000000000000 R14: 0000000006a80005 R15: 0000000000000200 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline] unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1468 [inline] __pagevec_lru_add+0x59b/0x6a0 mm/swap.c:1015 lru_cache_add+0x36d/0x390 mm/swap.c:462 add_to_page_cache_lru+0x4b8/0x530 mm/filemap.c:956 page_cache_ra_unbounded+0x7c3/0xf40 mm/readahead.c:222 do_page_cache_ra+0x289/0x2a0 mm/readahead.c:267 do_sync_mmap_readahead+0xa8b/0xc10 mm/filemap.c:2810 filemap_fault+0x5da/0x2520 mm/filemap.c:2898 ext4_filemap_fault+0xbb/0x130 fs/ext4/inode.c:6196 __do_fault mm/memory.c:3639 [inline] do_read_fault+0x9f6/0x11e0 mm/memory.c:3941 do_fault mm/memory.c:4069 [inline] handle_pte_fault mm/memory.c:4320 [inline] __handle_mm_fault mm/memory.c:4455 [inline] handle_mm_fault+0x3be2/0x4ef0 mm/memory.c:4553 do_user_addr_fault+0x159a/0x2650 arch/x86/mm/fault.c:1403 handle_page_fault arch/x86/mm/fault.c:1488 [inline] __exc_page_fault+0xe3/0x340 arch/x86/mm/fault.c:1544 exc_page_fault+0x45/0x50 arch/x86/mm/fault.c:1500 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x455709 Code: 24 40 8b 44 24 60 85 c0 7d 1b c7 44 24 70 ff ff ff ff 48 c7 44 24 78 00 00 00 00 48 8b 6c 24 40 48 83 c4 48 c3 48 8b 4c 24 50 <39> 41 20 7e db 48 8d 51 27 48 63 c0 48 8d 04 82 48 8d 40 01 8b 00 RSP: 002b:000000c00056f848 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 000000000099b420 RCX: 0000000000a5aae0 RDX: 00000000005931ed RSI: 00000000005931ed RDI: 00000000005932a0 RBP: 000000c00056f888 R08: 0000000000000c6f R09: 000000c00103dc70 R10: 000000000077789b R11: 000000000000c000 R12: 000000c00d62e000 R13: 000000000000016d R14: 000000000000016c R15: 0000000000000200 Local variable ----blocks@ext4_mpage_readpages created at: ext4_mpage_readpages+0x10e/0x4130 fs/ext4/readpage.c:237 ext4_mpage_readpages+0x10e/0x4130 fs/ext4/readpage.c:237 =====================================================