KCSAN: data-race in __dput_to_list / step

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KCSAN: data-race in __dput_to_list / step_into (2) fs				1	419d	419d	0/26	auto-obsoleted due to no activity on 2023/04/13 20:32

================================================================== BUG: KCSAN: data-race in __dput_to_list / step_into read-write to 0xffff8881353a7240 of 4 bytes by task 20537 on cpu 1: d_shrink_add fs/dcache.c:456 [inline] __dput_to_list+0x1eb/0x240 fs/dcache.c:928 shrink_dentry_list+0x19c/0x380 fs/dcache.c:1200 prune_dcache_sb+0x72/0xa0 fs/dcache.c:1282 super_cache_scan+0x24e/0x300 fs/super.c:104 do_shrink_slab+0x2ad/0x600 mm/vmscan.c:831 shrink_slab_memcg+0x1b9/0x440 mm/vmscan.c:900 shrink_slab+0x5c/0x1c0 mm/vmscan.c:979 shrink_node_memcgs+0x28a/0x470 mm/vmscan.c:3182 shrink_node+0x955/0x1200 mm/vmscan.c:3304 shrink_zones+0x2c1/0x5d0 mm/vmscan.c:3542 do_try_to_free_pages+0x195/0x760 mm/vmscan.c:3601 try_to_free_mem_cgroup_pages+0x1d1/0x420 mm/vmscan.c:3916 reclaim_high+0xcd/0x110 mm/memcontrol.c:2335 mem_cgroup_handle_over_high+0x75/0x120 mm/memcontrol.c:2520 resume_user_mode_work include/linux/resume_user_mode.h:58 [inline] exit_to_user_mode_loop+0xa5/0x130 kernel/entry/common.c:169 exit_to_user_mode_prepare kernel/entry/common.c:201 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x6a/0x90 kernel/entry/common.c:294 do_syscall_64+0x37/0x70 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff8881353a7240 of 4 bytes by task 20536 on cpu 0: __d_entry_type include/linux/dcache.h:384 [inline] d_is_symlink include/linux/dcache.h:414 [inline] step_into+0x121/0x7d0 fs/namei.c:1836 walk_component fs/namei.c:1999 [inline] link_path_walk+0x53e/0x8a0 fs/namei.c:2320 path_openat+0x19c/0x1b00 fs/namei.c:3687 do_filp_open+0x105/0x220 fs/namei.c:3718 do_sys_openat2+0xb5/0x2a0 fs/open.c:1311 do_sys_open fs/open.c:1327 [inline] __do_sys_openat fs/open.c:1343 [inline] __se_sys_openat fs/open.c:1338 [inline] __x64_sys_openat+0xef/0x110 fs/open.c:1338 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: 0x0020000c -> 0x0000800c Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 20536 Comm: syz-executor.3 Not tainted 6.0.0-rc3-syzkaller-00328-g42cf58c272ee-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 ==================================================================