set_capacity_and_notify: 2 callbacks suppressed
loop9: detected capacity change from 0 to 764
==================================================================
BUG: KCSAN: data-race in copy_mm / percpu_counter_destroy_many

write to 0xffff888103a9f7e8 of 8 bytes by task 14030 on cpu 1:
 __list_del include/linux/list.h:203 [inline]
 __list_del_entry include/linux/list.h:226 [inline]
 list_del include/linux/list.h:237 [inline]
 percpu_counter_destroy_many+0xc7/0x2b0 lib/percpu_counter.c:244
 __mmdrop+0x25d/0x3f0 kernel/fork.c:735
 mmdrop include/linux/sched/mm.h:55 [inline]
 mmdrop_sched include/linux/sched/mm.h:83 [inline]
 mmdrop_lazy_tlb_sched include/linux/sched/mm.h:110 [inline]
 finish_task_switch+0x184/0x280 kernel/sched/core.c:5180
 context_switch kernel/sched/core.c:5301 [inline]
 __schedule+0x93c/0xd40 kernel/sched/core.c:6911
 preempt_schedule_irq+0x2d/0x50 kernel/sched/core.c:7238
 raw_irqentry_exit_cond_resched+0x4b/0x60 kernel/entry/common.c:196
 irqentry_exit+0x91/0x520 kernel/entry/common.c:239
 asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
 __sanitizer_cov_trace_pc+0x5c/0x70 kernel/kcov.c:233
 security_context_to_sid_core+0x37/0x440 security/selinux/ss/services.c:1555
 security_context_to_sid+0x2e/0x40 security/selinux/ss/services.c:1642
 selinux_inode_setxattr+0x4aa/0x6d0 security/selinux/hooks.c:3382
 security_inode_setxattr+0x12e/0x1a0 security/security.c:1915
 __vfs_setxattr_locked+0x8b/0x220 fs/xattr.c:286
 vfs_setxattr+0x12c/0x2a0 fs/xattr.c:321
 do_setxattr fs/xattr.c:636 [inline]
 filename_setxattr+0x1c4/0x410 fs/xattr.c:664
 path_setxattrat+0x2be/0x310 fs/xattr.c:708
 __do_sys_lsetxattr fs/xattr.c:749 [inline]
 __se_sys_lsetxattr fs/xattr.c:745 [inline]
 __x64_sys_lsetxattr+0x71/0x90 fs/xattr.c:745
 x64_sys_call+0x1300/0x3020 arch/x86/include/generated/asm/syscalls_64.h:190
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read to 0xffff888103a9f2c0 of 1664 bytes by task 25463 on cpu 0:
 dup_mm kernel/fork.c:1525 [inline]
 copy_mm+0xe1/0x370 kernel/fork.c:1583
 copy_process+0xe22/0x20b0 kernel/fork.c:2223
 kernel_clone+0x16b/0x5d0 kernel/fork.c:2653
 __do_sys_clone3 kernel/fork.c:2955 [inline]
 __se_sys_clone3+0x1f5/0x230 kernel/fork.c:2934
 __x64_sys_clone3+0x31/0x40 kernel/fork.c:2934
 x64_sys_call+0x580/0x3020 arch/x86/include/generated/asm/syscalls_64.h:436
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x12c/0x370 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 UID: 0 PID: 25463 Comm: syz.9.4663 Tainted: G        W           syzkaller #0 PREEMPT(full) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
==================================================================