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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: 8220 Comm: syz-fuzzer Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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
 </IRQ>
 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: 0000:ffff888130077520 EFLAGS: 00000206
RAX: ffff8880bb45a050 RBX: ffff88810005a050 RCX: 00000000bb85a050
RDX: ffff8880bb85a050 RSI: 0000000000000200 RDI: ffff88810005a050
RBP: ffff888130077538 R08: ffffea000000000f R09: ffff88813fffa000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88810005a050
R13: ffff88812dcd8a88 R14: 00000000063b0005 R15: 0000000000000200
 spin_unlock_irqrestore include/linux/spinlock.h:409 [inline]
 unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1516 [inline]
 __pagevec_lru_add+0x65c/0x760 mm/swap.c:1064
 lru_cache_add+0x3c3/0x400 mm/swap.c:475
 add_to_page_cache_lru+0x4b8/0x530 mm/filemap.c:983
 page_cache_ra_unbounded+0x6b3/0xec0 mm/readahead.c:221
 do_page_cache_ra+0x289/0x2a0 mm/readahead.c:267
 do_sync_mmap_readahead+0xab7/0xc50 mm/filemap.c:2903
 filemap_fault+0x5e8/0x1fa0 mm/filemap.c:2990
 ext4_filemap_fault+0xbb/0x130 fs/ext4/inode.c:6194
 __do_fault mm/memory.c:3723 [inline]
 do_read_fault+0x9f6/0x11e0 mm/memory.c:4027
 do_fault mm/memory.c:4155 [inline]
 handle_pte_fault mm/memory.c:4414 [inline]
 __handle_mm_fault mm/memory.c:4549 [inline]
 handle_mm_fault+0x3be2/0x4ef0 mm/memory.c:4647
 do_user_addr_fault+0x1597/0x2650 arch/x86/mm/fault.c:1403
 handle_page_fault arch/x86/mm/fault.c:1488 [inline]
 __exc_page_fault+0xe0/0x340 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: 0033:0x45476a
Code: 50 48 8b 5c 24 20 48 89 de 48 29 d3 48 89 da 48 c1 eb 0c 48 8d 1c 9b 48 c1 e3 02 48 03 58 48 48 81 e2 ff 0f 00 00 48 c1 ea 08 <8b> 3b 48 83 fa 10 0f 83 18 01 00 00 0f b6 54 13 04 01 fa 48 8b 48
RSP: 002b:000000c000009878 EFLAGS: 00010203
RAX: 0000000000ba1880 RBX: 0000000000998b68 RCX: 0000000000ba1880
RDX: 000000000000000d RSI: 00000000006abd8b RDI: 000000c000009ac0
RBP: 000000c000009888 R08: 000000c01b2737e0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000003
R13: 0000000001857600 R14: 000002c71d499eb8 R15: 000000c005f91a00

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
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