syzbot

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BUG: KCSAN: data-race in list_lru_add / list_lru_count_node

read-write to 0xffff888103adb260 of 8 bytes by task 1777 on cpu 1:
 list_lru_add+0x2a1/0x2d0 mm/list_lru.c:134
 d_lru_add+0xa5/0xe0 fs/dcache.c:431
 retain_dentry+0x153/0x190 fs/dcache.c:685
 dput+0x10e/0x1f0 fs/dcache.c:908
 do_unlinkat+0x288/0x510 fs/namei.c:4263
 __do_sys_unlink fs/namei.c:4308 [inline]
 __se_sys_unlink fs/namei.c:4306 [inline]
 __x64_sys_unlink+0x2c/0x30 fs/namei.c:4306
 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+0x63/0xcd

read to 0xffff888103adb260 of 8 bytes by task 19414 on cpu 0:
 list_lru_count_node+0x28/0x30 mm/list_lru.c:201
 list_lru_count include/linux/list_lru.h:131 [inline]
 shrink_dcache_sb+0x1cd/0x2b0 fs/dcache.c:1322
 reconfigure_super+0x146/0x540 fs/super.c:888
 do_remount fs/namespace.c:2702 [inline]
 path_mount+0x984/0xb60 fs/namespace.c:3362
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x281/0x2d0 fs/namespace.c:3568
 __x64_sys_mount+0x63/0x70 fs/namespace.c:3568
 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+0x63/0xcd

value changed: 0x0000000000000000 -> 0x0000000000000001

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 19414 Comm: syz-executor.5 Not tainted 5.19.0-rc6-syzkaller-00115-g4a57a8400075-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
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