syzbot

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BUG: KCSAN: data-race in do_select / pollwake

write to 0xffffc9000146ba70 of 4 bytes by interrupt on cpu 0:
 __pollwake fs/select.c:198 [inline]
 pollwake+0xb9/0x110 fs/select.c:218
 __wake_up_common+0xbc/0x130 kernel/sched/wait.c:107
 __wake_up_common_lock kernel/sched/wait.c:137 [inline]
 __wake_up+0x80/0xc0 kernel/sched/wait.c:156
 ring_buffer_wakeup kernel/events/core.c:5972 [inline]
 perf_event_wakeup kernel/events/core.c:6407 [inline]
 perf_pending_event+0x2b2/0x3c0 kernel/events/core.c:6493
 irq_work_single kernel/irq_work.c:211 [inline]
 irq_work_run_list kernel/irq_work.c:242 [inline]
 irq_work_run+0xf1/0x2f0 kernel/irq_work.c:251
 __sysvec_irq_work+0x1e/0xb0 arch/x86/kernel/irq_work.c:22
 sysvec_irq_work+0x87/0xb0 arch/x86/kernel/irq_work.c:17
 asm_sysvec_irq_work+0x1b/0x20
 is_atomic kernel/kcsan/core.c:247 [inline]
 should_watch kernel/kcsan/core.c:275 [inline]
 check_access kernel/kcsan/core.c:741 [inline]
 __tsan_read8+0x11f/0x180 kernel/kcsan/core.c:1014
 folio_memcg_kmem include/linux/memcontrol.h:554 [inline]
 uncharge_folio+0x1d/0x350 mm/memcontrol.c:6770
 __mem_cgroup_uncharge_list+0x4c/0x90 mm/memcontrol.c:6843
 mem_cgroup_uncharge_list include/linux/memcontrol.h:710 [inline]
 release_pages+0xd27/0xd60 mm/swap.c:979
 __pagevec_release+0x5d/0x70 mm/swap.c:1000
 pagevec_release include/linux/pagevec.h:82 [inline]
 folio_batch_release include/linux/pagevec.h:146 [inline]
 truncate_inode_pages_range+0x442/0xae0 mm/truncate.c:373
 truncate_inode_pages+0x20/0x30 mm/truncate.c:452
 swap_inode_boot_loader fs/ext4/ioctl.c:405 [inline]
 __ext4_ioctl fs/ext4/ioctl.c:1335 [inline]
 ext4_ioctl+0x1edb/0x2740 fs/ext4/ioctl.c:1519
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xcb/0x140 fs/ioctl.c:856
 __x64_sys_ioctl+0x3f/0x50 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

read to 0xffffc9000146ba70 of 4 bytes by task 2371 on cpu 1:
 poll_schedule_timeout fs/select.c:243 [inline]
 do_select+0xf2e/0x1020 fs/select.c:607
 core_sys_select+0x368/0x520 fs/select.c:681
 do_pselect fs/select.c:763 [inline]
 __do_sys_pselect6+0x1f4/0x250 fs/select.c:804
 __se_sys_pselect6 fs/select.c:795 [inline]
 __x64_sys_pselect6+0x74/0x80 fs/select.c:795
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x46/0xb0

value changed: 0x00000000 -> 0x00000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 2371 Comm: syz-executor.1 Not tainted 5.18.0-syzkaller-02752-gfdaf9a5840ac-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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