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BUG: KCSAN: data-race in autofs_wait / autofs_wait

read to 0xffffffff87005910 of 4 bytes by task 29671 on cpu 0:
 autofs_wait+0x8ac/0xbc0 fs/autofs/waitq.c:399
 autofs_mount_wait+0xc2/0x100 fs/autofs/root.c:256
 autofs_d_automount+0x3fd/0x570 fs/autofs/root.c:410
 follow_automount fs/namei.c:1565 [inline]
 __traverse_mounts+0x256/0x420 fs/namei.c:1618
 traverse_mounts fs/namei.c:1647 [inline]
 handle_mounts fs/namei.c:1749 [inline]
 step_into_slowpath+0x2d5/0x4c0 fs/namei.c:2104
 step_into fs/namei.c:2152 [inline]
 walk_component fs/namei.c:2288 [inline]
 link_path_walk+0x953/0xde0 fs/namei.c:-1
 path_parentat fs/namei.c:2860 [inline]
 __filename_parentat+0x1ad/0x460 fs/namei.c:2884
 filename_parentat fs/namei.c:2902 [inline]
 filename_create+0x78/0x220 fs/namei.c:5083
 filename_mkdirat+0x81/0x300 fs/namei.c:5448
 __do_sys_mkdirat fs/namei.c:5476 [inline]
 __se_sys_mkdirat+0x32/0xf0 fs/namei.c:5473
 __x64_sys_mkdirat+0x43/0x50 fs/namei.c:5473
 x64_sys_call+0x368/0x2550 arch/x86/include/generated/asm/syscalls_64.h:259
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

write to 0xffffffff87005910 of 4 bytes by task 29674 on cpu 1:
 autofs_wait+0x8d7/0xbc0 fs/autofs/waitq.c:-1
 autofs_mount_wait+0xc2/0x100 fs/autofs/root.c:256
 autofs_d_automount+0x3fd/0x570 fs/autofs/root.c:410
 follow_automount fs/namei.c:1565 [inline]
 __traverse_mounts+0x256/0x420 fs/namei.c:1618
 traverse_mounts fs/namei.c:1647 [inline]
 handle_mounts fs/namei.c:1749 [inline]
 step_into_slowpath+0x2d5/0x4c0 fs/namei.c:2104
 step_into fs/namei.c:2152 [inline]
 walk_component fs/namei.c:2288 [inline]
 lookup_last fs/namei.c:2789 [inline]
 path_lookupat+0x2eb/0x4c0 fs/namei.c:2813
 filename_lookup+0x18f/0x390 fs/namei.c:2842
 user_path_at+0x3e/0x100 fs/namei.c:3641
 ksys_umount fs/namespace.c:2123 [inline]
 __do_sys_umount fs/namespace.c:2131 [inline]
 __se_sys_umount fs/namespace.c:2129 [inline]
 __x64_sys_umount+0x85/0xe0 fs/namespace.c:2129
 x64_sys_call+0x225e/0x2550 arch/x86/include/generated/asm/syscalls_64.h:167
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x112/0x360 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x0000d67f -> 0x0000d680

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 UID: 0 PID: 29674 Comm: syz.3.7197 Not tainted syzkaller #0 PREEMPT(lazy) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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